Hazardous Materials: Miscellaneous Amendments Pertaining to DOT-Specification Cylinders (RRR), 48977-49022 [2016-16689]

Download as PDF Vol. 81 Tuesday, No. 143 July 26, 2016 Part III Department of Transportation asabaliauskas on DSK3SPTVN1PROD with PROPOSALS Pipeline and Hazardous Materials Safety Administration 49 CFR Parts 107, 171, 172, et al. Hazardous Materials: Miscellaneous Amendments Pertaining to DOTSpecification Cylinders (RRR); Proposed Rule VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 PO 00000 Frm 00001 Fmt 4717 Sfmt 4717 E:\FR\FM\26JYP2.SGM 26JYP2 48978 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules DEPARTMENT OF TRANSPORTATION Pipeline and Hazardous Materials Safety Administration 49 CFR Parts 107, 171, 172, 173, 178 and 180 [Docket No. PHMSA–2011–0140 (HM–234)] RIN 2137–AE80 Hazardous Materials: Miscellaneous Amendments Pertaining to DOTSpecification Cylinders (RRR) Pipeline and Hazardous Materials Safety Administration (PHMSA), DOT. ACTION: Notice of proposed rulemaking (NPRM). AGENCY: The Pipeline and Hazardous Materials Safety Administration (PHMSA) is proposing to amend the Hazardous Materials Regulations to revise certain requirements applicable to the manufacture, use, and requalification of DOT-specification cylinders. PHMSA is taking this action in response to petitions for rulemaking submitted by stakeholders and to agency review of the compressed gas cylinders regulations. Specifically, PHMSA is proposing to incorporate by reference or update the references to several Compressed Gas Association publications, amend the filling requirements for compressed and liquefied gases, expand the use of salvage cylinders, and revise and clarify the manufacture and requalification requirements for cylinders. DATES: Comments must be submitted by September 26, 2016. To the extent possible, PHMSA will consider latefiled comments as a final rule is developed. SUMMARY: You may submit comments identified by the docket number PHMSA–2011–0140 (HM–234) by any of the following methods: • Federal eRulemaking Portal: https:// www.regulations.gov. Follow the instructions for submitting comments. • Fax: 1–202–493–2251. • Mail: Docket Management System; U.S. Department of Transportation, West Building, Ground Floor, Room W12–140, Routing Symbol M–30, 1200 New Jersey Avenue SE., Washington, DC 20590. • Hand Delivery: To the Docket Management System; Room W12–140 on the ground floor of the West Building, 1200 New Jersey Avenue SE., Washington, DC 20590, between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. asabaliauskas on DSK3SPTVN1PROD with PROPOSALS ADDRESSES: VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 Instructions: All submissions must include the agency name and docket number for this NPRM at the beginning of the comment. To avoid duplication, please use only one of these four methods. All comments received will be posted without change to the Federal Docket Management System (FDMS), including any personal information. Docket: For access to the dockets to read background documents or comments received, go to https:// www.regulations.gov or DOT’s Docket Operations Office (see ADDRESSES). To access and review the ASME material proposed for incorporation by reference in this rulemaking, please refer to the following Web site: https://go.asme.org/ PHMSA-ASME-PRM. To access and review the CGA materials proposed for incorporation by reference in this rulemaking, please refer to the following Web site: https://www.cganet.com/ customer/dot.aspx. Privacy Act: Anyone is able to search the electronic form of any written communications and comments received into any of our dockets by the name of the individual submitting the document (or signing the document, if submitted on behalf of an association, business, labor union, etc.). You may review DOT’s complete Privacy Act Statement in the Federal Register published on April 11, 2000 (65 FR 19477), or you may visit https:// www.regulations.gov. FOR FURTHER INFORMATION CONTACT: Eileen Edmonson, Standards and Rulemaking Division, and Mark Toughiry, Mechanical Engineer, Engineering and Research Division, Pipeline and Hazardous Materials Safety Administration, U.S. Department of Transportation, 1200 New Jersey Avenue SE., Washington, DC 20590, at (202) 366–8553. SUPPLEMENTARY INFORMATION: I. Executive Summary II. ANPRM Background III. Petitions for Rulemaking and Comments Received IV. Special Permits V. Agency Initiated Editorial Corrections VI. Section-by-Section Review VII. Regulatory Analyses and Notices A. Statutory/Legal Authority for This NPRM B. Executive Order 12866, Executive Order 13563, and DOT Regulatory Policies and Procedures C. Executive Order 13132 D. Executive Order 13175 E. Regulatory Flexibility Act, Executive Order 13272, and DOT Procedures and Policies F. Paperwork Reduction Act G. Regulation Identifier Number (RIN) H. Unfunded Mandates Reform Act of 1995 I. Environmental Assessment PO 00000 Frm 00002 Fmt 4701 Sfmt 4702 J. Privacy Act K. International Trade Analysis I. Executive Summary Cylinders filled with a Class 2 hazardous material (gas) and offered for transportation must comply with various subparts of the Hazardous Materials Regulations (HMR; 49 CFR parts 171–180). These include 49 CFR part 173, subpart G, which sets forth the requirements for preparing and packaging gases; 49 CFR part 178, subpart C, which sets forth the specifications for cylinders (i.e., how they should be constructed); and 49 CFR part 180, subpart C, which sets forth the requirements for continued qualification, maintenance, and periodic requalification of cylinders. Additionally, cylinders must meet other requirements in the HMR, such as regulations that address the modal effects on cylinders in transportation including general handling, loading, unloading, and stowage. PHMSA (also ‘‘we’’ or ‘‘us’’), in response to petitions for rulemaking submitted by stakeholders and an agency initiated review of the regulations, is proposing changes to the HMR, including but not limited to the following: Incorporating by reference or updating references to several Compressed Gas Association (CGA) publications; amending the filling requirements for compressed and liquefied gases; expanding the use of salvage cylinders; revising and clarifying the manufacture and requalification requirements for cylinders; and adopting a special permit (DOT–SP 14237). This NPRM is also presenting minor and miscellaneous regulatory editorial corrections. Further, PHMSA is addressing the comments received from a previous Advance Notice of Proposed Rulemaking (ANPRM; 77 FR 31551), and proposing additional revisions that have been requested in petitions received since the ANPRM’s 2012 publication. These proposed revisions intend to reduce regulatory burdens while maintaining or enhancing the existing level of safety. In this NPRM, PHMSA is responding to 20 petitions for rulemaking submitted by stakeholders. II. ANPRM Background On May 29, 2012 [77 FR 31551], PHMSA published an ANPRM to obtain public comment from those likely to be affected by the possible incorporation of 10 petitions for rulemaking and 3 special permits into the HMR. These include cylinder manufacturers (approximately 568 companies); cylinder requalifiers; independent E:\FR\FM\26JYP2.SGM 26JYP2 48979 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules inspection agencies; commercial establishments that own and use DOTspecification cylinders and UN pressure receptacles; and individuals who export non-UN/ISO compressed gas cylinders. Incorporating these petitions for rulemaking and special permits would update and expand the use of currently authorized industry consensus standards; revise the construction, marking, and testing requirements of DOT–4 series cylinders; clarify the filling requirements for cylinders; discuss the handling of cylinders used in fire suppression system; and revise the requalification and condemnation requirements for cylinders. The ANPRM comment period closed on August 27, 2012. PHMSA received comments from 13 stakeholders, including compressed gas and/or cylinder manufacturers, cylinder testers, and trade associations representing the compressed gas industry or shippers of hazardous materials. Most comments either answered questions PHMSA posed in the ANPRM or responded to multiple petitions and/or special permits. Regarding the petitions, the comments received were mostly supporting for all but one—P–1515. PHMSA received four comments regarding special permits, and all supported their adoption into the HMR. A list of the commenters, along with the related Docket ID Number, is shown in Table 1 below: TABLE 1—ANPRM COMMENTERS AND ASSOCIATED COMMENTS DOCKET NOS. Company Docket ID No. Air Products and Chemicals, Inc .................................................................................................................................... Bancroft Hinchley ............................................................................................................................................................ Barlen and Associates, Inc ............................................................................................................................................. City Carbonic, LLC ......................................................................................................................................................... Compressed Gas Association ........................................................................................................................................ Council on Safe Transportation of Hazardous Articles, Inc ........................................................................................... CTC Certified Training .................................................................................................................................................... HMT Associates .............................................................................................................................................................. Hydro-Test Products, Inc ................................................................................................................................................ Manchester Tank ............................................................................................................................................................ Norris Cylinder ................................................................................................................................................................ SodaStream USA, Inc .................................................................................................................................................... Worthington Cylinder Corporation .................................................................................................................................. III. Petitions for Rulemaking and Comments Received Table 2 lists the petitions included in the docket for this proceeding. This NPRM addresses 20 total petitions. Ten petitions are associated with the ANPRM, and 10 additional petitions have been included since its publication. This table provides the petition number, the petitioner’s name, PHMSA–2011–0140–0004 PHMSA–2011–0140–0008 PHMSA–2011–0140–0018 PHMSA–2011–0149–0024 PHMSA–2011–0140–0019 PHMSA–2011–0140–0029 PHMSA–2011–0140–0005 PHMSA–2011–0140–0012 PHMSA–2011–0140–0013 PHMSA–2011–0140–0020 PHMSA–2011–0140–0026 PHMSA–2011–0140–0001 PHMSA–2011–0140–0023 PHMSA–2011–0140–0030 PHMSA–2011–0140–0002 PHMSA–2011–0140–0021 PHMSA–2011–0140–0017 PHMSA–2011–0140–0016 PHMSA–2011–0140–0025 PHMSA–2011–0140–0027 PHMSA–2011–0140–0028 the docket number on www.regulations.gov, a brief summary of the petitioner’s requests, the affected sections, and whether or not we are proposing to adopt the petition: TABLE 2—PETITION SUMMARY Petition No. Petitioner Docket No. Compressed Gas Association. PHMSA–2007–28485 P–1501 ............ asabaliauskas on DSK3SPTVN1PROD with PROPOSALS P–1499 ............ Compressed Gas Association. PHMSA–2007–28759 P–1515 ............ Certified Training Company PHMSA–2008–0101 ... VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 PO 00000 Frm 00003 Summary Proposed affected sections Replace the incorporated by reference (IBR) Seventh Edition of the CGA C–6 Standards for Visual Inspection of Steel Compressed Gas Cylinders with the revised Tenth Edition and update the appropriate references throughout the HMR. Revise the specification requirements for 4B, 4BA, 4BW, and 4E cylinders to provide clarity. Adopt changes to the requalification process designed to clarify the regulations in the event CGA Standard C–1, Methods of Pressure Testing Compressed Gas Cylinders, is not incorporated. §§ 171.7; 172.102 (SP 338); 173.3(d)(9); 173.198(a); 180.205(f)(1); 180.209(c), (b)(1)(iii), (d), (f), (g), (m); 180.211(d)(1)(ii); 180.411(b); 180.510(c). Yes. §§ 178.50, 178.51, 178.61, 178.68. Yes, in part. §§ 180.203, 180.205, 180.207, 180.209, 180.211, 180.212, 180.213, 180.215, appendix C to part 180, appendix E to part 180. Yes, except those changes not necessary because of IBR of CGA C–1 under P– 1626. Fmt 4701 Sfmt 4702 E:\FR\FM\26JYP2.SGM 26JYP2 Proposing to adopt? 48980 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules TABLE 2—PETITION SUMMARY—Continued Petition No. Petitioner Docket No. Summary Proposed affected sections Allow the use of labels described in CGA C–7–2004 on a cylinder contained in an overpack. Allow § 173.306(a)(1) to permit camping stove cylinders containing liquefied petroleum gas in amounts less than four (4) ounces to be shipped as consumer commodity (ORM– D). Define ‘‘capacity’’ in § 171.8. Allow DOT 3A, 3AA, 3AL cylinders in Division 2.2 Services to be retested every 15 years. Allow DOT 3A, 3AA, and 3AL cylinders packaged with Division 2.1 materials to be requalified every 10 years.. Require newly manufactured DOT 4B, 4BA, 4BW, and 4E cylinders to be marked with the mass weight, tare weight, and water capacity. Allow cylinders used as a component of a fixed fire suppression system to be transported under the exceptions applicable to fire extinguishers. Modify the maximum permitted filling densities for carbon dioxide and nitrous oxide to include 70.3%, 73.2%, and 74.5% in DOT 3A, 3AA, 3AX, 3AAX, and 3T cylinders. Authorize an ‘‘overpack’’ as a strong outer package for cylinders listed in the section, except aerosols ‘‘2P’’ and ‘‘2Q,’’ marked with the phrase ‘‘inner packagings conform to the prescribed specifications’’. Revise the filling ratio for liquefied compressed gases in MEGCs consistent with Packing Instruction (P200) of the United Nations (UN)—Model Regulations (17th ed. 2011), as specified in § 173.304b; and prohibit liquefied compressed gases in manifolded DOT cylinders from exceeding the filling densities specified in § 173.304a(a)(2). Require the burst pressure of the rupture disc on a cylinder ‘‘shall not exceed 80% of the minimum cylinder burst pressure and shall not be less than 105% of the cylinder test pressure’’. Revise the limited quantity exception for water pump system tanks to authorize transport of tanks manufactured to American National Standards Institute’s Water Systems Council Standard PST–2000– 2005(2009). § 172.400a(a)(1)(i) ............... Yes. §§ 171.8, 173.306(a)(1) ....... No. § 180.209(a) ......................... No. § 178.35(f) ............................ Yes. § 173.309(a) ......................... Yes. § 173.304a(a)(2) .................. No. Addressed by revisions made under rulemaking HM–233F [81 FR 3635]. § 173.301 (a)(9) ................... Uncertain. We are asking for further comment. §§ 173.301(g)(1)(ii) and 173.312. Yes, in part. §§ 173.301(f)(4), 173.302(f)(2), 173.304(f)(2). Yes. § 173.306(g) ......................... Yes. Compressed Gas Association. PHMSA–2008–0152 ... P–1538 ............ The Wicks Group, representing Jetboil Inc. PHMSA–2009–0138 ... P–1539 ............ Matheson Tri-Gas ................ PHMSA–2009–0140 ... P–1540 ............ Compressed Gas Association. PHMSA–2009–0146 ... P–1546 ............ GSI Training Services, Inc. PHMSA–2009–0250 ... P–1560 ............ Air Products and Chemicals, Inc. PHMSA–2010–0176 ... P–1563 ............ Regulatory Affairs Management Center—3M Package Engineering, Global Dangerous Goods. PHMSA–2010–0208 ... P–1572 ............ Barlen and Associates, Inc. PHMSA–2011–0017 ... P–1580 ............ asabaliauskas on DSK3SPTVN1PROD with PROPOSALS P–1521 ............ HMT Associates .................. PHMSA–2011–0123 ... P–1582 ............ Water Systems Council ....... PHMSA–2011–0135 ... VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 PO 00000 Frm 00004 Fmt 4701 Sfmt 4702 E:\FR\FM\26JYP2.SGM 26JYP2 Proposing to adopt? 48981 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules TABLE 2—PETITION SUMMARY—Continued Docket No. Summary P–1592 ............ Petition No. Compressed Gas Association. Petitioner PHMSA–2012–0173 ... P–1596 ............ Chemically Speaking, LLC. PHMSA–2012–0200 ... P–1622 ............ Worthington Cylinders Corporation. PHMSA–2013–0210 ... P–1626 ............ Compressed Gas Association. PHMSA–2013–0265 ... P–1628 ............ Compressed Gas Association. PHMSA–2013–0278 ... P–1629 ............ Compressed Gas Association. PHMSA–2014–0012 ... P–1630 ............ Compressed Gas Association. PHMSA–2014–0027 ... IBR CGA S–1.1, 2011 Pressure Relief Device Standards, Part 1, Cylinder for Compressed Gas, Fourteenth Edition. Add Class 4 and Class 5 hazardous materials to the hazard classes in an authorized salvage cylinders. Restrict the internal volume of hazardous materials shipped in a DOT-specification 39 cylinder to not exceed 75 cubic inches. IBR CGA C–1–2009, Methods for Pressure Testing Compressed Gas Cylinders, Tenth Edition (C– 1, 2009) as a reference in 49 CFR, and provide for specific language for sections affected. IBR CGA C–3–2005, Reaffirmed 2011, Standards for Welding on ThinWalled, Steel Cylinders, Seventh Edition. IBR CGA C–14–2005, Reaffirmed 2010, Procedures for Fire Testing of DOT Cylinder Pressure Relief Device Systems, Fourth Edition, as a reference in 49 CFR. Add the term ‘‘recondition’’ for DOT–4L welded insulated cylinders and revise language to clarify when a hydrostatic test must be performed on the inner containment vessel after the DOT–4L welded insulated cylinder has undergone repair. asabaliauskas on DSK3SPTVN1PROD with PROPOSALS P–1499 The CGA submitted P–1499 requesting that PHMSA replace the currently incorporated by reference C–6 Standards for Visual Inspection of Steel Compressed Gas Cylinders, Seventh Edition with the revised Tenth Edition and update the appropriate references throughout the HMR. The Tenth Edition provides enhanced guidance for cylinder requalifiers—including guidance on the inspection of MultipleElement Gas Containers (MEGCs) and the requirements for thread inspection for cylinders used in corrosive gas service—and clarifies maximum allowable depths and measuring techniques for various types of corrosion. PHMSA identified approximately 5,000 companies that would be subject to this standard, with the majority being classified as small businesses using the Small Business Administration (SBA) size standards (<500 employees). This revision would impose a one-time cost VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 Proposed affected sections Yes. § 173.3(d)(2) ........................ Yes. §§ 173.304a and 173.304a(a)(3). Yes. §§ 171.7, 178.36, 178.37, 178.38, 178.39, 178.42, 178.44, 178.45, 178.46, 178.47, 178.50, 178.51, 178.53, 178.55, 178.56, 178.57, 178.58, 178.59, 178.60, 178.61, 178.65, 178.68, 180.205, 180.209. §§ 171.7, 178.47, 178.50, 178.51, 178.53, 178.55, 178.56, 178.57, 178.58, 178.59, 178.60, 178.61, 178.65, 178.68, 180.211. §§ 171.7, 173.301, 173.323 Yes. §§ 180.203, 180.211(c), and 180.211(e). Yes. of between $78 and $142 per document depending on the document format (electronic or hard copy) and the purchaser’s CGA membership. Air Products and Chemicals, City Carbonic, CGA, Hydro-Test Products, and Worthington Cylinders support the proposal as discussed in the May 29, 2012 ANPRM. No commenters objected to the proposal. PHMSA agrees that the Tenth Edition provides improved and updated guidance on inspecting MEGCs. While there were no comments opposed to the incorporation, subsequent to the submission of this petition, a more current updated version of CGA C–6 has been made available (i.e., an eleventh edition). Therefore, in this NPRM, PHMSA is proposing to update the IBR of CGA C–6 to the 2013 Eleventh Edition. We invite comment on this course of action. P–1501 The CGA submitted P–1501 requesting that PHMSA revise the PO 00000 Frm 00005 Fmt 4701 Sfmt 4702 Proposing to adopt? §§ 173.301(c), (f) and (g), 173.304a(e), 178.75(f). Yes. Yes. manufacturing requirements for DOT 4B, 4BA, 4BW, and 4E cylinders. According to the petition, the current DOT–4 series welded cylinder manufacturing requirements are unclear in some respects and result in varied interpretation by manufacturers and enforcement personnel. The CGA states that although the proposed changes do not present a significant economic impact to any single manufacturer or user, they will enhance regulatory clarity, promote consistent manufacturing practices, and create greater uniformity between the specifications for DOT–4 series cylinders and the requirements for welded cylinders found in International Organization for Standardization (ISO) Standard 4706–1, Gas cylinders— Refillable welded steel cylinders—Part 1: Test pressure 60 bar and below, which is referenced in the UN Model Regulations. E:\FR\FM\26JYP2.SGM 26JYP2 asabaliauskas on DSK3SPTVN1PROD with PROPOSALS 48982 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules Summary of the changes proposed by P–1501 and the comments received are detailed below: (1) Revise the requirements for DOTspecification 4B, 4BA, 4BW, and 4E cylinders in §§ 178.50(b), 178.51(b), 178.61(b), and 178.68(b), respectively, to ensure material compositions and the heat treatment are within the specified tolerances and are of uniform quality as follows: (1) Require a record of intentionally-added alloying elements, and (2) require materials manufactured outside of the United States to have a ladle analysis confirmed by a check analysis. Norris Cylinder sought clarification on the requirement to report intentionally added alloying elements. Specifically, Norris Cylinder inquired if PHMSA would require the manufacturer to maintain documents other than the mill certificate and the DOT Test Report. PHMSA has decided that the proposed revisions to §§ 178.50(b), 178.51(b), 178.61(b), and 178.68(b) with respect to proposed measure (2) above is not necessary based on the required duties of inspectors in § 178.35(c)(2) to verify the material of construction meets the requirements of the applicable specification by (1) making a chemical analysis of each heat of material; (2) obtaining a certified chemical analysis from the material manufacturer for each heat of material (a ladle analysis is acceptable); or (3) if an analysis is not provided for each heat of material by the material manufacturer, by making a check analysis of a sample from each coil, sheet, or tube. However, we do believe a record of intentionally added alloying elements will be useful for ensuring material compositions are within the specified tolerances. As pointed out by Norris cylinder, the regulatory text proposed by CGA does not specify who must maintain the document. In this NPRM, we specify that the cylinder manufacturer must maintain the record of intentionally added alloying elements. Further, we are not proposing to require a check analysis to confirm the ladle analysis for materials manufactured outside of the United States because we believe this is already addressed by requiring domestic performance of required check analyses under § 178.35(b) of the HMR. We invite comment on this course of action. (2) Revise the pressure tests for DOTspecification 4B, 4BA, 4BW, and 4E cylinders in §§ 178.50(i), 178.51(i), 178.61(i), and 178.68(h), respectively, to permit use of the volumetric expansion test, a hydrostatic proof pressure test or a pneumatic proof pressure test. VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 Hydro-Test Products and Manchester Tank expressed concern that PHMSA would allow a pneumatic pressure test. Because the potential release of energy in the event of a cylinder rupture during a pneumatic test is much greater than that released if a cylinder ruptured during a hydrostatic test, the commenters state that the person conducting the test must take additional precautions to safeguard against injury, such as erecting a safety barrier to protect personnel. Worthington Cylinders noted that it had extensive experience conducting proof pressure tests with gas but further stated that each company’s safety considerations of the testing equipment will be different. Given the added risk associated with pneumatic testing and the fact that there are suitable alternatives to determine the leakproofness of a cylinder at the time of manufacture, PHMSA is not proposing to permit the use of pneumatic proof pressure testing in this NPRM. (3) Revise the physical and flattening tests and retest criteria for DOTspecification 4B, 4BA, 4BW, and 4E cylinders in §§ 178.50, 178.51, 178.61, and 178.68, respectively, for consistency. These revisions would clarify the location on the cylinder from which the test specimens are removed. Manchester Tank requested that the specific proposed wording, or more detailed information, be made available for comment. Readers may review the specific changes to these sections at the end of this document. (4) Revise §§ 178.50(n), 178.51(n), and 178.61(o), and 178.68, respectively, for DOT-specification 4B, 4BA, 4BW, and 4E cylinders to permit marking on the footring for cylinders with water capacities up to 30 pounds, instead of 25 pounds. Manchester Tank and Worthington Cylinders support the CGA proposal that would allow markings to be applied to the footring on cylinders up to 30pounds water capacity, instead of the current capacity limit of 25 pounds. The commenters state that this revision would not impose any cost and would expand upon existing options. In this NPRM, PHMSA is proposing this revision as stated in the petition. (5) Add requirements for the location of markings on DOT 4E cylinders in § 178.68. Manchester Tank and Worthington Cylinders support the proposed modification to permit marking of the valve protection collar of DOT 4E cylinders. In this NPRM, PHMSA is proposing the revision as stated in the petition. PO 00000 Frm 00006 Fmt 4701 Sfmt 4702 P–1515 The Certified Training Company (CTC) submitted P–1515 requesting that PHMSA make numerous revisions to the requirements for the requalification of DOT-specification cylinders found in 49 CFR part 180, subpart C. These requirements include definitions for terms used in the subpart, references to CGA publications for the visual inspection of cylinders, and requirements for hydrostatically testing cylinders including methods to ensure the accuracy of test equipment. The CTC states that the current requirements create confusion for requalifiers and enforcement officials. In the ANPRM, PHMSA requested comments on two possible methods of responding to this petition. The first, as was suggested by CTC in P–1515, was to modify the specific HMR provisions in §§ 180.203 through 180.215 for requalification of cylinders. The second was to IBR into § 180.205 CGA C–1, Methods for Pressure Testing Compressed Gas Cylinders, Tenth Edition (2009), which contains most of the provisions and additions specified in P–1515, including revisions to definitions in § 180.203, appropriate procedures for conducting the hydraulic pressure tests, and marking and recordkeeping requirements. PHMSA identified 980 entities that conduct hydrostatic retesting. Incorporation of CGA C–1 would impose a one-time cost of between $102 and $186 per document depending on the document format (electronic or hard copy) and the purchaser’s CGA membership. We received eight comments on this petition. Air Products and Chemicals, CGA, Bancroft Hinchley, and Worthington Cylinders support adoption of the CGA C–1 standard. Conversely, Hydro-Test Products stated that the proposals in P–1515 and the CGA C–1 impose stricter requirements on accuracy, pressure drop, and verification, therefore imposing an unnecessary burden on the industry. SodaStream requested PHMSA modify the appropriate sections of 49 CFR part 180, subpart C, instead, as adoption of CGA C–1 would limit their ability to conduct volumetric expansion tests and would result in a need to obtain a special permit. As indicated by Worthington Cylinders, several commenters stated similar concerns to those shared regarding the option to IBR CGA C–1, with Worthington Cylinders further stating that CGA C–1 ‘‘represents the best testing practices for the industry.’’ Moreover, as indicated by CGA, the E:\FR\FM\26JYP2.SGM 26JYP2 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules asabaliauskas on DSK3SPTVN1PROD with PROPOSALS changes proposed in P–1515 would not resolve the confusion of requalifiers and enforcement officials that the petition seeks to address. For these reasons, in this NPRM, PHMSA is proposing to IBR CGA C–1, Methods for Pressure Testing Compressed Gas Cylinders, at § 171.7 and into § 180.205 and numerous other sections (see discussion of Petition P– 1626). However, subsequent to the submission of this petition, an eleventh edition of CGA C–1 has been made available. Therefore, in this NPRM, PHMSA is proposing to update the IBR of CGA C–1 to the 2016 Eleventh Edition. We invite comment on this course of action. The CTC further requests that PHMSA correct and reissue two letters of interpretation (Reference Nos. 00–0309 and 05–0087), as well as provide formal interpretation on six additional issues identified in its petition. PHMSA invites public comment on the questions, recommendations, and proposed responses detailed below: (1) Existing Clarification Letter Reference No. 00–0309 On March 15, 2001, PHMSA responded to an inquiry from Vallen Technical Services (VTS) pertaining to the pressure retest of DOT-specification cylinders (Reference No. 00–0309). Citing that former § 173.34(e)(4)(v)— currently § 180.205(g)(5)—states, ‘‘In the case of a malfunction of the test equipment, the test may be repeated at a pressure increased by 10 percent or 100 [pounds per square inch] psi, whichever is less,’’ VTS stated its understanding that only one repeat test is permitted. PHMSA responded with the following: ‘‘Your understanding of this requirement is correct. Section 173.34(e)(4)(v) permits only one repeat test in the case of a malfunction of the test equipment. With regards to your reference to the Compressed Gas Association (CGA) pamphlet C–1, currently the HMR do not incorporate the pamphlet by reference. However, we proposed in a notice of proposed rulemaking to reference certain pressure test procedures contained in the CGA pamphlet. (Docket No. HM–98–3684 (HM–220); October 30, 1998).’’ The CTC states that § 180.205(g)(5) ‘‘permits only one repeated test’’ and further posits that this letter’s response directly contradicts language PHMSA previously issued in a final rule [Docket No. HM–220A (61 FR 26750); February 28, 1996)] that states: ‘‘A commenter specifically asks how many repeated tests are allowed before condemning the cylinder, and the response is that the cylinder is to be condemned when it exceeds its permanent expansion limit. VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 It even specifies, ‘. . . Thus when this limit [Perm. Expan.] is exceeded . . .’ [i.e., no limit to the number of repeats is given, even when the specific question was asked.]’’ Although the CTC states it favors limiting the number of repeat tests of this type, it believes PHMSA’s statement on this matter in Reference No. 00–0309 ‘‘constitutes a rulechange, not an interpretation.’’ The CTC believes requiring only one repeat test ‘‘may be overly restrictive in some cases, such as small aircraft cylinders, and certain composite cylinders,’’ and suggests allowing two repeated tests, as permitted in special permits DOT–SPs 10915, 10945, and 11194, would be ‘‘more in line with current industry procedure.’’ On August 8, 2002, PHMSA’s predecessor agency, the Research and Special Programs Administration, issued a final rule under Docket No. HM–220D that consolidated the requirements for qualification, use, and maintenance of cylinders in 49 CFR part 180, subpart C. As a result, the regulatory sections referred to in Reference No. 00–0309 are no longer correct. Further, not all the requirements previously codified in § 173.34 have parallel requirements in 49 CFR [art 180, subpart C. See § 180.205(g)(5) for additional information. However, PHMSA agrees with the CTC that the language in Reference No. 00–0309 may be misleading and believes the IBR of CGA C–1 into § 180.205 will resolve any issue the CTC may have with this letter of interpretation. We invite comment on this conclusion. PHMSA also plans to retract Reference No. 00–0309. (2) Existing Clarification Letter Reference No. 05–0087 On May 10, 2005, PHMSA responded to an inquiry from G&C Kinney, Inc., concerning calibration verification of equipment used for volumetric expansion tests for DOT-specification cylinders (Reference No. 05–0087). The company asked whether the maximum pressure at which the verification test is being conducted (for example, 3,000 pounds) must be maintained at the final pressure for 30 seconds or whether the pressure may be allowed to drop between 2 psi and 10 psi. PHMSA responded by stating, ‘‘Overall, for any pressure test (calibration or production retest), the 30-second hold time begins only when the cylinder has completed its expansion. If the cylinder pressure drops by any measurable amount (such as 2 psi) during the recorded 30-second hold time, the hold time must be PO 00000 Frm 00007 Fmt 4701 Sfmt 4702 48983 restarted, or the test would be considered invalid.’’ The CTC requests that PHMSA retract its Reference No. 05–0087 response because it contradicts regulatory text found in § 180.205(g)(2), (g)(3)(i), and (g)(5); DOT–SPs 10915 and 10945; standards in CGA C–1, Seventh Edition (1996); and some manuals of manufacturers of hydrostatic test equipment. Specifically, the CTC states the following: Paragraph 180.205(g)(5) states, ‘‘Minimum test pressure must be maintained for at least 30 seconds, and as long as necessary for complete expansion of the cylinder.’’ [Emphasis added.] This statement tells us that the cylinder may be expanding during the 30 second hold time, and if the cylinder is still expanding at the end of the 30 seconds, we must hold even longer than the minimum 30 seconds. As the cylinder expands, its volume increases, and pressure will drop. Therefore, the statement ‘‘as long as necessary for complete expansion of the cylinder’’ is equivalent to saying ‘‘until the pressure ceases to drop’’. The regulations state that this may occur during the 30 second hold time; the regulations do not specify the hold time begins after the cylinder has completed its expansion. Therefore, this ‘‘interpretation’’ directly contradicts § 180.205(g)(5), and constitutes a rule change. Paragraph 180.205(g)(2) states, ‘‘[t]he pressure indicating device of the testing apparatus must permit reading of pressures to within 1% of the minimum prescribed test pressure of each cylinder tested.’’ Paragraph 180.205(g)(3)(i) states, ‘‘[t]he pressureindicating device, as part of the retest apparatus, is accurate within ±1.0% of the prescribed test pressure of any cylinder tested that day.’’ This interpretation attempts to declare a test invalid due to a 2 psi drop in pressure at 3000 psi. The pressure indicating device has already been defined as having a 1% resolution and ±1% accuracy. According to the definition of the device, it can deviate by ±30 psi at 3000 psi (30 psi = 1% of 3000 psi). This interpretation violates the definition of the device as stated in these two paragraphs. Furthermore, many special permits, such as DOT–SP 10915 and 10945, recognize that different materials (such as the carbon-fiber wrapped, aluminum lined cylinders referenced in these special permits) take even longer than 30 seconds to completely deform under the load of test pressure, and therefore require a hold time of 60 seconds. According to this interpretation, these special permits would require a hold time of 60 seconds (or longer), until the cylinder completed its expansion, and then an additional 60 seconds of hold time, wherein the pressure could not drop by even 2 psi. This, obviously, is not the intention of these special permits when they state, ‘‘. . . for a minimum test time of one minute.’’ Industry standard CGA C–1, Seventh Edition 1996, ‘‘Methods for Hydrostatic Testing of Compressed Gas Cylinders,’’ in paragraph 4.4(g) states, ‘‘[w]hen the desired E:\FR\FM\26JYP2.SGM 26JYP2 48984 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules value is reached, stop the pressurization and hold for 30 seconds.’’ And, ‘‘[t]he expansion and pressure should remain stable during the entire 30 seconds. If either the pressure or expansion do not stabilize within ±1%, see 4.5 [Troubleshooting].’’ Thus, the 30-second hold begins when the pump stops, and deviation during the hold time is allowed up to the defined accuracy of the device, that is, ±1% of the test pressure, and ±1% of the total expansion. Manufacturers of hydrostatic test equipment specify in their manuals and the software controlling automated equipment that the 30-second hold time begins when the test pressure is reached and the pump is turned off. asabaliauskas on DSK3SPTVN1PROD with PROPOSALS The CTC further states: ‘‘This interpretation declares virtually every test performed on cylinders in the past century to be invalid, since every cylinder tested (as well as the hoses on the machine) will continue to expand after the pump is stopped. Therefore the pressure will drop. The only issue is whether or not the device is capable of detecting such a minute drop in pressure.’’ The CTC believes this interpretation is based on two misunderstandings: 1. Closed loop hydraulics vs. open system. In a closed loop hydraulic system (such as the controls on an aircraft), any drop in pressure is unacceptable. This does not apply to an open system where the pressure will drop (e.g., a cylinder expanding during a test). 2. Higher precision digital devices vs. analog devices. There has always been a slight drop in pressure during the hold time. On an analog device, it was not visible. It is now visible on a digital device, but that does not simply invalidate the test. PHMSA agrees with the CTC that the language in Reference No. 05–0087 is misleading and believes the IBR of CGA C–1 into § 180.205, in conjunction with additional changes to the regulations proposed consistent with petition P– 1626, will resolve any issue the CTC may have with this letter of interpretation. We invite comment on this conclusion. PHMSA also plans to retract Reference No. 05–0087. P–1521 The CGA submitted P–1521 requesting that PHMSA modify the provision in § 172.400a(a)(1)(i) to remove the limitation that only allows the use of the neckring markings if a cylinder is not overpacked. The petition would still require the overpack to display the labels in conformance with 49 CFR part 172, subpart E. The HMR permit the use of a neckring marking, under certain conditions, in conformance with the CGA C–7, Guide VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 to Preparation of Precautionary Labeling and Marking of Compressed Gas Containers, Appendix A, Eighth Edition (2004) under § 172.400a. This neckring marking identifies the contents of a cylinder by displaying the proper shipping name, the UN identification number, and the hazard class or division label within a single marking. Section 172.400a(a)(1) permits the use of this marking in lieu of required labels on a Dewar flask meeting the requirements in § 173.320 or a cylinder containing Division 2.1, 2.2, and 2.3 material that is not overpacked. This requirement should provide flexibility in hazard communication for cylinders, especially small cylinders. The marking prescribed in appendix A to CGA C–7 provides useful information in a clear and consistent manner, and its widespread use on cylinders has enhanced its recognition. CGA’s proposed change would provide greater flexibility for shipments of overpacked cylinders while ensuring adequate hazard communication. If cylinders are contained in an overpack, the overpack must display the appropriate markings and labels. PHMSA identified approximately 86 entities engaged in Industrial Gas Manufacturing, of which 74 are classed as small entities (<500 employees). Other potentially impacted entities include wholesalers of medical equipment, service establishment equipment and supplies, and other miscellaneous durable goods. In the ANPRM, PHMSA asked for comments on the potential implications of this change, specifically regarding its necessity and the potential safety and economic impacts. PHMSA also sought data concerning the breadth of shipments to be impacted by the proposal. PHMSA received no responses to these questions from commenters to the ANPRM. Both Air Products and Chemicals and Worthington Cylinders support CGA’s petition to revise § 172.400a(a)(1)(i). Therefore, in this NPRM, PHMSA is proposing to revise § 172.400a(a)(1)(i) to remove the limitation that would only allow the use of the neckring markings if the cylinders are not overpacked, as proposed in P–1521. The petition would still require the overpack to display the required labels in conformance with 49 CFR part 172, subpart E. P–1538 On behalf of Jetboil, Inc., The Wicks Group submitted P–1538 requesting that PHMSA revise § 173.306(a)(1) to permit camping stove cylinders containing liquefied petroleum gas (LPG) in amounts less than 4 ounces but in a PO 00000 Frm 00008 Fmt 4701 Sfmt 4702 container exceeding 4 fluid ounce capacity to be shipped as consumer commodity (ORM–D). Section 173.306 prescribes requirements for transporting compressed gases as a limited quantity and a consumer commodity. Paragraph (a)(1) of § 173.306 requires a container of only compressed gas to be limited to a capacity of 4 fluid ounces or less except cigarette lighters, which are required to meet rigorous performance design standards and packaging requirements prescribed in § 173.308. The Wicks Group states if more than 4 fluid ounces of the liquefied portion of the gas were enclosed in the cylinder, ‘‘there would be insufficient space remaining for the gaseous portion of the liquefied gas, as required by [§§ 173.304(b) and 173.304a(d)(1)]. In other words, [§§ 173.304(b) and 173.304a(d)(1)] together limit the percentage of space [emphasis added] that the liquefied portion of a liquefied gas may take up in a cylinder. Thus, since the canisters at issue here could not safely or legally hold more than four (4) fluid ounces of LPG while complying with the HMR filling limits and filling density requirements, they can reasonably be said to have a capacity of four (4) fluid ounces.’’ The petitioner included a certificate from the manufacturer of the ‘‘Jetpower’’ 100G canister of cooking fuel, Taeyang Ind., Co., LTD, of Seoul, Korea, certifying ‘‘that the capacity of the 100G canister is less than 4 oz. because the capacity of the canister should be measured by the amount of liquefied gas contents in a fluid condition that it can hold, still leaving room for the portion in a gas condition. The 100G canisters must have less than 4 oz. of liquefied gas to meet that requirement. The capacity of the 100G canisters ‘Jetpower’ should be considered less than 4 ounces. These canisters are safe for transportation as ORM–D.1 We are unaware of any problems occurring with these canisters in transportation.’’ PHMSA seeks public comment on the safety issues associated with this proposal, especially those regarding the safe performance of containers of this type in transportation. The Wicks Group further states on behalf of Jetboil, Inc., that ‘‘. . . 49 CFR 173.306(a)(1) is ambiguous as currently drafted. In brief, the HMR do not define the term capacity, but do define the term ‘maximum capacity,’ at 49 CFR 171.8, as meaning ‘the maximum inner volume of receptacles or packagings.’ If PHMSA interprets ‘capacity’ as meaning the total volume of the container, then 1 Note that the ORM–D class will be completely phased out for all modes of transportation by December 31, 2020. E:\FR\FM\26JYP2.SGM 26JYP2 asabaliauskas on DSK3SPTVN1PROD with PROPOSALS Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules the word ‘maximum’ would be rendered meaningless. This violates the longestablished rule of statutory and regulatory interpretation that courts must give effect to every clause and word of a legal text whenever possible. Indeed, the omission of a word in one section of a text can be telling where that word issued in another section of the same act or regulation.’’ In addition, the petitioner states providing industry an opportunity to comment on this issue in a rulemaking will give them the chance ‘‘to explain why these containers present a reduced safety risk, and to demonstrate that there have been no transportation safety incidents involving these containers.’’ PHMSA has limited the amount of compressed gas in limited quantity packagings to reduce the opportunity and speed of the gaseous product’s reaction to an activating event, having found that including non-gaseous materials in the same container with the gas—such as foodstuffs, soap, etc.— slowed this reaction. The petitioner requested that PHMSA define the word ‘‘capacity’’ in the HMR to add meaning to the maximum capacity definition in § 171.8. The Interstate Commerce Commission first adopted the provision for § 173.306(a)(1) (previously § 73.306(a)(1)) in a final rule published July 1, 1966 (31 FR 9067). The provision provided an ‘‘exemption’’ (i.e., an exception) from regulations for shipping of compressed gases ‘‘when in containers of not more than 4 fluid ounce water capacity.’’ Thus, historically, the provision applies to the capacity of the container and not to the quantity of its contents. This is consistent with design requirements for the capacity of packagings found in part 178 that includes a specification for the water capacity of the packaging (e.g., Specification 3A and 3AX seamless steel cylinders in § 178.36); however, the publication of a final rule on April 15, 1976 (41 FR 15972) inadvertently dropped the term ‘‘water’’ from paragraph (a)(1) regardless of there having been no express discussion of the intent to do so or to change the size standard from the originally adopted water capacity to the quantity of the contents. Furthermore, the definition ‘‘maximum capacity’’ was introduced as part of a harmonization effort with international regulations and standards in a final rule published December 21, 1990 (55 FR 52402) for consistency with use of terminology internationally for UN performance oriented packaging. See the part 178, subpart L non-bulk performance oriented packaging sections. Therefore, based on the VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 historical context of capacity as its use in § 173.306(a)(1) to mean water capacity and the adoption of the term ‘‘maximum capacity’’ in association with the adoption of UN performanceoriented packaging, we are not proposing to amend § 173.306(a)(1) to accommodate this petition for rulemaking. P–1539 Matheson-TriGas submitted P–1539 requesting that PHMSA revise § 180.209, which prescribes requirements for requalifying cylinders. Paragraph (a) of § 180.209 requires each DOT-specification cylinder listed in ‘‘table 1 of this paragraph’’ to be requalified and marked in conformance with requirements specified in § 180.209. The petitioner requests that PHMSA extend the 10-year retest period prescribed in this table for DOT 3A, 3AA, and 3AL specification cylinders in Division 2.2 (non-flammable) gas service to once every 15 years. Matheson-TriGas also requests in its petition that PHMSA extend the 5-year retest period prescribed in this table for DOT 3A, 3AA, and 3AL specification cylinders in Division 2.1 (flammable) gas service to once every 10 years. The petitioner states: ‘‘Historically over 99.4% of cylinders in the above[-mentioned] services that were [subjected] to the water jacket test pass the test,’’ and ‘‘it is more likely . . . the cylinder failed the external or internal visual [test] rather than failing the water jacket test.’’ Matheson-TriGas notes PHMSA’s statement from an earlier rulemaking regarding the history of the plus rating for steel cylinders resulting from the steel shortage of World War II, which resulted in changes ‘‘that benefitted the industry with no compromise of public safety down to this day.’’ MathesonTriGas extrapolates that we face similar metal shortage challenges in today’s economy. Upon further consideration of this petition based on our concern of increasing the risk of cylinder failure by lengthening the timeframe between periodic qualifications, PHMSA is electing not to propose to revise the 10year requalification period for DOT 3A, 3AA, and 3AL specification cylinders in Division 2.2 (non-flammable) gas service to once every 15 years, nor to revise the 5-year requalification period for DOT 3A, 3AA, and 3AL specification cylinders in Division 2.1 (flammable) gas service to once every 10 years. We invite comment on this decision and request detailed information in support or opposition to this decision. PO 00000 Frm 00009 Fmt 4701 Sfmt 4702 48985 P–1540 The CGA submitted P–1540 requesting that PHMSA require newly manufactured DOT 4B, 4BA, 4BW, and 4E cylinders to be marked with the mass weight, tare weight, and water capacity. As specified in § 178.35(f), the HMR require DOT-specification cylinders to be permanently marked with specific information including the DOTspecification, the service pressure, a serial number, an inspector’s mark, and the date manufacturing tests were completed. These marks provide vital information to fillers and uniquely identify the cylinder. Certain DOT 4-series specification cylinders contain liquefied gases filled by weight, so the tare weight (i.e., the weight of the empty cylinder and appurtenances) or the mass weight (i.e., the weight of the empty cylinder), and the water capacity must be known by the filler to properly fill the cylinder. This information is essential for cylinders filled by weight, as cylinders overfilled with a liquefied gas can become liquid full as the ambient temperature increases. If temperatures continue to rise, pressure in the overfilled cylinder will rise disproportionately, potentially leading to leakage or a violent rupture of the cylinder after only a small rise in temperature. Despite these risks, the HMR do not require tare weight, mass weight, or water capacity markings on DOT-specification cylinders. To address this, the CGA petitioned PHMSA to require tare weight or mass weight, and water capacity to be marked on newly constructed DOT 4B, 4BA, 4BW, and 4E specification cylinders. The petition also requests that PHMSA provide guidance on the accuracy of these markings and define the party responsible for applying them. In its petition, CGA notes that PHMSA IBRs the National Fire Protection Association’s 58-Liquefied Petroleum Gas Code (NFPA 58), which requires cylinders used for liquefied petroleum gases to be marked with the tare weight and water capacity; 2 however, as stated in the petition, NFPA 58 gives no guidance as to the accuracy of these markings or the party required to provide them. The CGA states that this lack of guidance can lead to the overfilling of a cylinder and the potential for unsafe conditions. While DOT 4B, 4BA, 4BW, and 4E cylinders are often used to transport liquefied compressed gas, we noted in 2 Note that IBR of NFPA 58 is not for marking purposes but for purposes of equipping storage tanks containing LPG or propane with safety devices. See § 173.315(j). E:\FR\FM\26JYP2.SGM 26JYP2 asabaliauskas on DSK3SPTVN1PROD with PROPOSALS 48986 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules the ANPRM that these are not the only cylinder types used for liquefied compressed gas transport. For that reason, in the ANPRM, PHMSA asked for comment regarding the potential revision of § 178.35 to require all DOTspecification cylinders suitable for the transport of liquefied gases to be marked with the cylinder’s tare weight or water capacity. PHMSA understands that many in the compressed gas industry, especially the liquefied petroleum gas industry, already request manufacturers mark cylinders with this additional information as an added safety measure. Based on this assumption, PHMSA estimates the impact on the liquefied compressed gas industry will be minimal as many in the industry are already voluntarily applying these markings. In the ANPRM, we requested comment on this assertion. PHMSA identified six U.S. based manufacturers of the cylinders identified in the petition, of which five are classified as small businesses using SBA size standards (< 500 employees). PHMSA requested comments and supporting data regarding the increased safety benefits and the economic impact of this proposal. With regards to the cost associated with this modification, in the ANPRM, PHMSA asked the following specific questions: • What is the average total cost per cylinder to complete these markings (i.e., is an estimated cost of $0.10 per character for new markings accurate)? • What is the estimated quantity of newly manufactured 4B, 4BA, 4BW and 4E cylinders each year? Furthermore, how many of these cylinders already display tare weight and water capacity markings in compliance with NFPA 58 or other codes? • How many manufacturers of the cylinders mentioned above are considered small businesses by the SBA? PHMSA sought to identify: (1) The frequency of which the mass weight or tare weight, and water capacity markings are already permissively applied to cylinders, (2) the costs associated with applying these marks, (3) the safety benefits associated with the additional markings, and (4) the alternate methods or safeguards against overfilling of cylinders currently being implemented. Air Products and Chemicals supports the petition with no additional comments. The CGA supports the inclusions of tare weight, mass weight, and water capacity requirements on newly constructed DOT 4B, 4BA, 4BW, and 4E specification cylinders at the time of manufacture but does not support—and strongly disagrees with— VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 PHMSA’s consideration of modifying § 178.35 to require all DOT-specification cylinders suitable for the transport of liquefied gases to be marked with the cylinder’s tare weight and water capacity. The CGA also believes that the 49 CFR must further clarify that no cylinder must be filled with a liquefied gas unless a mass or tare weight is marked on the cylinder, providing the following justification: • At the time of manufacture, the manufacturer would not know whether the DOT 3 series cylinders are or are not be used in a liquefied gas service; • Marking all cylinders, as suggested by DOT, would include every cylinder manufactured in conformance with the specifications set forth in the HMR, which would therefore require cylinders that have been designed and manufactured for a specific permanent gas application be marked for tare weight and water capacity just because the cylinder could be used (at some time) for liquefiable gas; • There would be instances on small 3-series cylinders where the additional marking would not fit onto the dome of the cylinder; and • The economic impact estimated for marking all cylinders is significantly greater than the estimates submitted by PHMSA. Manchester Tank expresses concern that numerous variations in stamped weights could cause confusion in the field among fillers. They state that adding mass weight stamping to a cylinder that already has tare weight stamped could lead to incorrect filling if the wrong figure is used. They ask PHMSA for specific clarification of the language to assign the duty to mark tare weight to the valve installer and indicate that there are many cylinders that are not valved by the manufacturer, further declared that those cylinders can be marked correctly with mass weight— but not with tare weight, since the weight of the appurtenance may not be known to the manufacturer of the vessel. In addition, Manchester Tank notes that available space for stamping is limited on some vessels and increased stamping will not allow significant space for retest marking information. In this NPRM, PHMSA is proposing to revise § 178.35(f) to require that tare weight or mass weight, and water capacity be marked on certain DOT 4series specification cylinders used for the transport of liquefied gases as petitioned by the CGA. We stress that while cylinder markings are important to ensure the safe filling of liquefied compressed gas, they do not take the place of adequate personnel training, procedures to ensure proper filling, and PO 00000 Frm 00010 Fmt 4701 Sfmt 4702 continued requalification and maintenance of cylinders in preventing incidents. PHMSA seeks additional comment on expanding this marking requirement to other DOT-specification cylinders and the costs and benefits as well as the safety implications of doing so. P–1546 GSI Training Services submitted P– 1546 requesting that PHMSA allow cylinders that form a component of fire suppression systems to use the proper shipping name ‘‘Fire extinguishers’’ when offered for transportation. The Hazardous Materials Table (HMT) in § 172.101 provides a shipping description for cylinders used as fire extinguishers (i.e., ‘‘UN1044, Fire extinguishers, 2.2’’) and references § 173.309 for exceptions and non-bulk packaging requirements. Fire extinguishers charged with a limited quantity of compressed gas are excepted from labeling, placarding, and shipping paper requirements under certain conditions if the cylinder is packaged and offered for transportation in conformance with § 173.309.3 Additionally, fire extinguishers filled in conformance with the requirements of § 173.309 may use non-specification cylinders (i.e., cylinders not manufactured to specifications in part 178). Part 180 also provides special requirements for cylinders used as fire extinguishers (e.g., § 180.209(j) includes different requalification intervals). PHMSA has written several letters of clarification regarding the applicability of § 173.309 to fire extinguishers. Notably on March 9, 2005, PHMSA wrote a letter (Reference No. 04–0202) to Safecraft Safety Equipment regarding non-specification stainless steel cylinders used as a component in a fire suppression system for installation in vehicles and stated that the cylinders used in the fire suppression system appeared to meet the requirements of § 173.309. PHMSA issued another letter (Reference No. 06–0101) on May 30, 2008, to Buckeye Fire Equipment stating that the company could not use the shipping name ‘‘Fire extinguishers’’ for their cylinders, which served as a component of a kitchen fire suppression system, and must use the proper shipping name that best describes the material contained in the cylinder since these cylinders were not equipped to function as fire extinguishers. This latter clarification effectively required 3 Note that the format of § 173.309 was changed under a final rule published January 7, 2013 (HM– 215K; 78 FR 1101) such that the exceptions for limited quantities has been relocated to paragraph (d) of § 173.309. E:\FR\FM\26JYP2.SGM 26JYP2 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules asabaliauskas on DSK3SPTVN1PROD with PROPOSALS cylinders that are part of a fixed fire suppression system to meet an appropriate DOT-specification. In response to Reference No. 06–0101, GSI Training Services submitted a petition for rulemaking requesting PHMSA to allow cylinders that form a component of fire suppression systems to use the proper shipping name ‘‘Fire extinguishers’’ when offered for transportation, stating that: (1) At least one company manufactured over 39,000 non-specification cylinders for use in fire suppression systems based on the information provided in the March 9, 2005 letter; and (2) the May 30, 2008 clarification effectively placed this company out of compliance. GSI Training Services further suggests that cylinders comprising a component of a fixed fire suppression system will provide an equal or greater level of safety than portable fire extinguishers since cylinders in fire suppression systems are typically installed in buildings where they are protected from damage and not handled on a regular basis. In this NPRM, PHMSA is proposing to revise the § 173.309 introductory text to include cylinders used as part of a fire suppression system as a cylinder type authorized for transport in accordance with the HMT entry for fire extinguishers. The controls detailed in § 173.309 provide an acceptable level of safety regardless of whether the cylinder is equipped for use as a handheld fire extinguisher or as a component of a fixed fire suppression system. P–1563 3M Corporation submitted P–1563 requesting that PHMSA address the regulatory confusion between marking requirements for overpacks in § 173.25 and outside packages for certain thinwalled cylinders specified in § 173.301(a)(9). The petitioner notes that the differing marking requirements in §§ 173.25 and 173.301(a)(9) create confusion and make training difficult. This petition requests modification of the HMR to permit materials packaged in conformance with § 173.301(a)(9)— except aerosols ‘‘2P’’ and ‘‘2Q’’—to display the ‘‘OVERPACK’’ marking described in § 173.25, in lieu of the current requirement for ‘‘an indication that the inner packaging conforms to prescribed specifications.’’ In accordance with § 173.301(a)(9), DOT-specification 2P, 2Q, 3E, 3HT, spherical 4BA, 4D, 4DA, 4DS, and 39 cylinders must be packed in strong nonbulk outer packagings. This configuration meets the definition of a combination package as indicated in paragraph (a)(9) and further, as defined VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 in § 171.8 of the HMR. Paragraph (a)(9) requires the outside of this combination packaging to be marked with an indication that the inner packagings conform to the prescribed specifications. The completed combination package is subject to marking and labeling, as appropriate; however, the inner packagings do not have to be marked or labeled. These combination packages cannot also then be considered ‘‘overpacks.’’ For each completed package bearing required marking(s) and label(s) that is placed in an overpack, for consolidation or ease of handling, the overpack must also display the appropriate marking(s) and label(s) unless visible through the overpack [see § 173.25(a)(2)]. The ‘‘OVERPACK’’ mark must be applied when specification packagings are required by the HMR to communicate that the overpack contains specification packagings in conformance with the HMR. The marking ‘‘inside (inner) packages comply with the prescribed specifications’’ for overpacks in § 173.25 was changed in 2004 to ‘‘OVERPACK’’ in an effort to better align with global overpack requirements. The 3M Corporation accurately states that prior to 2004 both the overpack requirements in § 173.25 and the requirement in § 173.301(a)(9) to package certain DOTspecification cylinders in strong, nonbulk outer packagings used very similar language intended to inform package handlers that although not visible, the inner packages contained specification packagings that conformed to appropriate DOT or UN standards. PHMSA recognizes that differing marking requirements in §§ 173.25 and 173.301(a)(9) to communicate the same intended meaning may be causing confusion without enhancing safety. In order to address the petition and provide for greater clarity, PHMSA is proposing to revise § 173.301(a)(9) to authorize use of the ‘‘OVERPACK’’ marking as specified in § 173.25(a)(3) as a method to satisfy the current requirement in paragraph (a)(1) to mark the completed package with an indication that the inner packagings conform to prescribed specifications for the listed cylinders. We agree with 3M that the issue is more complex for 2P and 2Q containers as specified in §§ 173.304, 173.305, and 173.306 and, therefore, are not including 2P and 2Q in the allowance for the ‘‘OVERPACK’’ marking. The revision will also include instructional language that the combination package is not to be considered an ‘‘overpack.’’ PHMSA welcomes comments from affected entities regarding the following: PO 00000 Frm 00011 Fmt 4701 Sfmt 4702 48987 potential consequences, safety and economic impacts, current level of difficulty and unnecessary confusion, need for change, quantity of shipments per year to be impacted, etc. P–1572 Barlen and Associates submitted P– 1572 requesting that PHMSA explicitly state in § 173.312 that for liquefied compressed gases in Multiple-Element Gas Containers (MEGCs), the filling density of each pressure receptacle must not exceed the values contained in Packing Instruction P200 of the UN Model Regulations, as specified in § 173.304b, and the contents of each DOT-specification cylinder cannot exceed the densities specified in § 173.304a(a)(2).4 Requirements for shipping MEGCs are specified in § 173.312. Specifically, § 173.312(b) details the filling requirements for MEGCs and states,’’ [a] MEGC may not be filled to a pressure greater than the lowest marked working pressure of any pressure receptacle [and a] MEGC may not be filled above its marked maximum permissible gross mass.’’ The requirement that each pressure receptacle contained in the MEGC may not be filled above the working pressure of the lowest marked working pressure of any pressure receptacle is clear for permanent (nonliquefied compressed) gases, which are generally filled by pressure; however, § 173.312(b) does not contain a corresponding requirement addressing pressure receptacles containing a liquefied compressed gas, which are most often filled by weight. This lack of specificity for MEGCs containing liquefied compressed gas has led to some confusion on methods for their proper filling. Therefore, in this NPRM, we propose to specify the filling ratio requirements for pressure receptacles. PHMSA does not anticipate this provision will impose any new burden, as this proposal would only emphasize an important safety requirement already stated in § 173.304a for DOTspecification cylinders and § 173.304b for UN pressure receptacles. PHMSA invites comments from affected entities regarding the following: Safety and economic impacts, level of difficulty and unnecessary confusion, need for change, etc. 4 Note that the petition specifically referenced the 17th ed. of the UN Model Regulations, however, we will propose a change that references the edition currently incorporated by reference in § 171.7 because we biennially update the edition for harmonization with international standards. E:\FR\FM\26JYP2.SGM 26JYP2 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules P–1580 asabaliauskas on DSK3SPTVN1PROD with PROPOSALS 48988 In this NPRM, PHMSA proposes to revise § 173.301(f) as it applies to DOT 39 cylinders to alleviate any confusion and conflict between the PRD requirements in § 173.301(f) and those in §§ 173.302(f)(2) and 173.304(f)(2) with respect to minimum burst pressure of pressure relief devices on a DOT 39 cylinder used for the transport of compressed and liquified oxidizing gases by air. PHMSA notes that the revision made to § 173.301(f) was based on option 2 presented in HMT Associates comment to rulemaking HM– 218F and submitted as petition P–1580. PHMSA requests comments from the compressed gas industry regarding this course of action. HMT Associates submitted P–1580 requesting that PHMSA revise §§ 173.302(f)(2) and 173.304(f)(2) to require that the burst pressure of a rupture disc coincide with CGA S–1.1 for DOT 39 cylinders offered for transportation after October 1, 2008; other DOT-specification cylinders with the first requalification due after October 1, 2008; and UN pressure receptacles prior to initial use. Specifically, as prescribed in 4.2.2 of CGA S–1.1, the required burst pressure of the rupture disc ‘‘shall not exceed 80% of the minimum cylinder burst pressure and shall not be less than 105% of the cylinder test pressure.’’ Section 173.301(f) states that a cylinder filled with a compressed gas and offered for transportation ‘‘must be equipped with one or more [pressure relief devices (PRDs)] sized and selected as to type, location and quantity and tested in conformance with CGA S–1.1 [Pressure Relief Device Standards—Part 1—Cylinders for Compressed Gases, Fourteenth Edition (2005)] and CGA S– 7 [Method for Selecting Pressure Relief Devices for Compressed Gas Mixtures in Cylinders (2005)].’’ Sections 172.302(f)(2) and 172.304(f)(2) specify that the rated burst pressure of a rupture disc for DOT 3A, 3AA, 3AL, 3E, and 39 cylinders, as well as that for UN ISO 9809–1, ISO 9809–2, ISO 9809–3, and ISO 7866 cylinders containing oxygen, compressed; compressed gas, oxidizing, n.o.s.; or nitrogen trifluoride, must be 100 percent of the cylinder minimum test pressure with a tolerance of ‘plus zero’ to minus 10 percent. In response to PHMSA’s NPRM entitled ‘‘Hazardous Materials: Miscellaneous Amendments’’ published on September 29, 2010 [75 FR 60017] under Docket No. PHMSA–2009–0151 (HM–218F), HMT Associates submitted a late-filed comment that identified a potential discrepancy between the HMR and CGA S–1.1. Specifically, this commenter stated the HMR have different PRD settings than CGA S–1.1 for DOT 39 cylinders that make it virtually impossible to comply with both the HMR and CGA S–1.1. Sections 173.302(f)(2) and 173.304(f)(2) require the rated burst pressure of a rupture disc for DOT 3A, 3AA, 3AL, 3E, and DOT 39 cylinders to be 100 percent of the cylinder minimum test pressure with a tolerance of ‘plus zero’ to minus 10 percent, whereas section 4.2.2 of CGA S–1.1 requires the rated burst pressure of the rupture disc on DOT 39 cylinders to be not less than 105 percent of the cylinder test pressure. VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 P–1582 Water Systems Council submitted P– 1582 requesting that PHMSA revise § 173.306(g), which provides a limited quantity exception for water pump system tanks, by permitting tanks manufactured to American National Standards Institute (ANSI) and Water Systems Council (WSC) standard PST– 2000–2005(2009) to be authorized for transport. ANSI and WSC standard PST–2000– 2005 is an industry standard that prescribes minimum performance and construction requirements for pressurized storage tanks for service in water well systems with a maximum factory pre-charge pressure of 40 psig (280 kPa), to be operated in ambient air temperatures up to 120 °F (49 °C), with maximum working pressures not less than 75 psig (520 kPa) and not greater than 150 psig (1,000 kPa) and tank volumes not exceeding 120 gallons (450 L). The standard was developed by a group of WSC members comprised of leading U.S. manufacturers of pressurized water storage tanks for water wells to define and promote— through voluntary written standards— minimum performance and construction requirements for pressurized water storage tanks for service in water well systems. Incorporating the standard into the HMR will provide minimum requirements for pressurized water storage tanks for water wells that provide at least an equivalent level of safety as currently provided in the HMR. PHMSA identified 38 U.S. based manufacturers or distributors of water pump system tanks, most of which would be classified as a small business using SBA size standards (<500 employees). There are no costs associated with this proposal because it is already incorporated into the regulations. This proposal will authorize tanks to be tested to current PO 00000 Frm 00012 Fmt 4701 Sfmt 4702 standards in the HMR or the manufacturer’s specified minimum working pressure. Further, it allows water pump system tanks to be charged with helium in addition to the currently authorized nitrogen. The revisions would provide greater flexibility to stakeholders without compromising safety. Therefore, in this NPRM, PHMSA is proposing these recommended changes. P–1592 The CGA submitted P–1592 requesting that PHMSA replace the 2005 edition of CGA S–1.1, Pressure Relief Device Standards-Part 1-Cylinders for Compressed Gases with the 2011 edition as referenced in the HMR. CGA S–1.1 provides standards for selecting the correct pressure relief device to meet the requirements of § 173.301(f) for over 150 gases. It provides guidance on when a pressure relief device can be optionally omitted and when one’s use is prohibited, as well as direction on their manufacture, testing, operational parameters, and maintenance. PHMSA identified approximately 5,000 companies that would be subject to this standard, with the majority being classified as small businesses using SBA size standards (<500 employees). This minor update to the regulations improves the timeliness and clarity of industry standards that are IBR. It supports the goal of facilitating voluntary compliance and reducing the burdens associated with references to outdated material. Therefore, in this NPRM, PHMSA is proposing these recommended changes. P–1596 Chemically Speaking, LLC submitted P–1596 requesting that PHMSA revise the HMR pertaining to salvage drums. Specifically, they propose amending § 173.3(d) to allow Class 4 and Class 5 materials to be placed in salvage cylinders. For over 30 years the gas industry, public agencies, gas cylinder users, and gas disposal companies have used open head salvage cylinders fabricated to ASME specifications to quickly and safely contain and transport leaking cylinders to locations where they can be safely emptied or repaired. Salvage cylinders were originally permitted under special permits (exemptions) specific for each design,5 but these exemptions were adopted into the HMR in 2005. Class 4 or 5 materials were not 5 DOT–E 9507, 9781, 9991, 10022, 10110, 10151, 10323, 10372, 10504, 10519, 10789, 10987, 11257, 11459, 12698, 12790, and 12898. E:\FR\FM\26JYP2.SGM 26JYP2 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules asabaliauskas on DSK3SPTVN1PROD with PROPOSALS included in the adoption; however, there is no preamble language in the rules specifically indicating reasons for the exclusion. A salvage cylinder made to ASME specifications as a pressure vessel and packaged as prescribed in § 173.3(d) is a more robust package than a salvage container, which is used for liquids or solids. The addition of a pyrophoric material will not add a new hazard in the use of salvage cylinders, as some of the compressed gases that are also authorized have pyrophoric properties, such as silane, 2.1 (UN2203) or phosphine, 2.3 (UN2199). Moreover, these gases also have the added hazards of high pressure (1,500 psig), with the latter also being a toxic material. Over a period of four years (2006– 2010), the use of salvage pressure receptacles was debated at the UN Subcommittee on Transportation of Dangerous Goods. Numerous papers were submitted in support of this effort. In the December 2010 session, the use of salvage pressure receptacles was approved and published in ‘‘Amendments to the sixteenth revised edition of the Recommendations on the Transport of Dangerous Goods, Model Regulations.’’ The amendments include the authorization of salvage cylinders for Class 4 and 5 materials. This change will have a positive economic impact on owners of salvage cylinders as this will increase the instances where a salvage cylinder can be used. Many metal alkyl users and gas suppliers already own a salvage cylinder. There will be a negligible burden for procedures to be updated to include these cylinders. Therefore, in this NPRM, PHMSA is proposing these recommended changes; however, we do not propose additional reporting requirements. P–1622 Worthington Cylinders submitted P– 1622 requesting that PHMSA allow the internal volume of DOT 39 cylinders not to exceed 75 cubic inches, which will be reflected in revisions to the entries for cyclopropane, ethane, and ethylene in the § 173.304a(a)(2) table to include this limit in new footnote ‘‘Note 9.’’ This proposal would also clarify the 75 cubic inch limit for DOT 39 cylinders by adding it in a new sentence to § 173.304a(d)(3). Worthington Cylinders states its justifications for this petition are as follows: As discussed in my May 2011 letter, 49 CFR went through a rewrite in 2001. At this point in time, Paragraph 173.304 titled ‘‘Charging of cylinders with liquefied compressed gas’’ was divided into two specific sections, 173.304 and 173.304a. Previous to the change in 2001, Note 9 was VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 present in the Table of Paragraph 173.304. This note stated ‘‘When used for shipment of flammable gases, the internal volume of a Specification 39 cylinder must not exceed 75 cubic inches.’’ This would apply specifically to cylinders containing liquefied compressed gases. At the same time, Paragraph 173.302 titled ‘‘Charging of cylinder with nonliquefied compressed gases’’ stated in subsection 4 that for ‘‘Specification 39 cylinders for flammable gases, the internal volume may not exceed 75 cubic inches.’’ This paragraph would specifically pertain to cylinders charged with non-liquefied gases. The problem lies with each edition of 49 CFR published since 2001. Paragraph 173.304a is not making any statement limiting the Specification 39 cylinder volume when charging the cylinder with liquefied flammable gases, yet paragraph 173.302a(3) limits the flammable compressed gas in a Specification 39 cylinder to a maximum of 75 cubic inches. Clearly, DOT would not want to authorize a liquefied flammable compressed gas for any volume Specification 39 cylinder when the specifications limit the volume to 75 cubic inches for a flammable compressed gas. I will use propane as an example: Propane can be shipped as a compressed gas or a liquefied compressed gas. If it is shipped as a compressed gas the specifications limit the shipper to a container 75 cubic inches or smaller (49 CFR 173.302). If the shipper was shipping propane as a liquefied compressed gas there are no limitations in the regulations on the Specification 39 cylinder volume (49 CFR 174.304a). This clearly makes no logical sense when propane expands 270 times its volume from a liquid to a vapor. Why would the stored energy for a Specification 39 cylinder with vapor be limited to 75 cubic inches and for a liquid have no limitations? Specification 39 cylinders have a proven track record. Millions of these cylinders have been manufactured and used for the safe and reliable storage and transportation of compressed gases and liquefied compressed gases. This proven safety and reliable track record includes 2.1 flammable liquefied compressed gases limited to 75 cubic inch capacity. Worthington’s concerns of using up to 1526 cubic inch volume cylinders for 2.1 flammable liquefied compressed gases centers around the puncture resistance and corrosion resistance which are ‘‘real life’’ issues in the transportation of cylinders. Releasing basically four gallons of propane from a Specification 39 cylinder from a puncture or corrosion is not in the best interest of safety. Worthington strongly recommends that PHMSA review the following and consider it as immediate changes to 49 CFR 173.304a and 173.304(d)(3). PHMSA agrees with the petitioner and will permit valves other than those listed in CGA S–1.1 to be used by adding the word ‘‘may’’ to this phrase in the regulatory text: ‘‘a CG–7 pressure relief valve may be used.’’ In this NPRM, PHMSA is proposing these recommended changes. Worthington Cylinders also asked PHMSA to explain what is meant by PO 00000 Frm 00013 Fmt 4701 Sfmt 4702 48989 ‘‘chemical under pressure’’ in § 173.302a(a)(3) as it relates to this phrase: ‘‘or 50L for chemical under pressure.’’ Section 173.302a(a) describes detailed filling requirements for the shipment of non-liquefied (permanent) compressed gases in specification cylinders. Specifically, § 173.302a(a)(3) limits the capacity of a DOT 39 cylinder to 1.23 L (75 in3) when the cylinder is filled with a Division 2.1 material or 50 L (3050 in3) when the cylinder is filled with a chemical under pressure. PHMSA revised §§ 173.301b and 173.302a in a final rule [Docket No. PHMSA–2012–0027 (HM–215L); 78 FR 988] to increase the maximum allowable water capacity for non-refillable cylinders containing chemicals under pressure to 50 liters (3050in3); therefore, this request has been addressed. The phrase in question was added to the HMR under a final rule published January 7, 2013 (HM–215L; 78 FR 988). Under that final rule we introduced new HMT entries for ‘‘chemical under pressure,’’ assigned authorized non-bulk and bulk packaging, and included other safety requirements such as quantity and filling limits. See §§ 172.102, Special Provision 362, and 173.335. In the HM–215L final rule (78 FR 989), PHMSA discussed a comment received from 3M in support of the proposal; however, 3M requested that PHMSA authorize the use of non-refillable cylinders (i.e., DOT 39s) larger than 1.25 liters containing flammable gas consistent with the UN Model Regulations. We noted our ’’ intent regarding the chemical under pressure entry was to comprehensively align the requirements of this entry with international standards.’’ In the HM– 215L final rule, we revised the packaging requirements for chemical under pressure to authorize the use of nonrefillable cylinders larger than 1.25 liters for chemical under pressure, hence, the inclusion of ‘‘or 50L for chemical under pressure’’ for DOT 39 cylinders in § 173.302a(a)(3). This language applies to ‘‘chemicals under pressure’’ as described in Special Provision 362 and must not be applied to flammable gases. PHMSA is also looking to resolve the discrepancy created by this allowance for larger capacities for this cylinder type because it exceeds the size limits authorized under the design specifications for DOT 39 cylinders in § 178.65. In this NPRM, PHMSA is proposing to revise § 173.302a(a)(3) to clarify any confusion on the applicable capacity limits. P–1626 The CGA submitted P–1626 requesting that PHMSA IBR CGA C–1, E:\FR\FM\26JYP2.SGM 26JYP2 48990 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules asabaliauskas on DSK3SPTVN1PROD with PROPOSALS Methods for Pressure Testing Compressed Gas Cylinders, Tenth Edition (2009) and revise the regulations regarding the retesting of cylinders by the hydrostatic test as they are not only unclear to requalifiers, but also missing necessary information rendering the regulations unenforceable. Although the petition proposed the Tenth Edition, currently there is an Eleventh Edition (2016) available. PHMSA is proposing to IBR this most current version and requests comment regarding this action. PHMSA identified approximately 980 entities that conduct hydrostatic testing, including cylinder requalifiers, retesters, and manufacturers. In this NPRM, PHMSA is proposing to adopt clarifying language and IBR the CGA C–1 standard, as proposed in P– 1626, as it provides more detailed instructions and illustrations than what is possible in the HMR and addresses the deficiencies detailed in the petition. The CGA requests that this proposed IBR apply to the following sections: §§ 178.36, 178.37, 178.38, 178.39, 178.42, 178.44, 178.45, 178.46, 178.47, 178.50, 178.50, 178.51, 178.53, 178.55, 178.56, 178.57, 178.58, 178.59, 178.60, 178.61, 178.65, 178.68, 180.205, and 180.209. The incorporation of CGA C– 1, 2016 supports the goal of increasing compliance and improving overall safety as its reference increases clarity, provides enhanced guidance, and reduces confusion between CGA current dates and IBR versions. Specific clarifications include instructions for performing volumetric expansion tests using both the water-jacket and direct expansion methods, as well as a provision for retesting in case of equipment failure or operator error. Revising the HMR to IBR CGA C–1 will provide the desired clarification without imposing requirements that are potentially costly or unnecessarily difficult. P–1628 The CGA submitted P–1628 requesting that PHMSA IBR CGA C–3– 2005, Reaffirmed 2011, Standards for Welding on Thin-Walled, Steel Cylinders, Seventh Edition as material incorporated by reference in the HMR. Presently, the HMR reference CGA C–3– 1994, Standards for Welding on ThinWalled Steel Cylinders, Fourth Edition. This publication contains information on welding process qualification, welding operator qualifications, tensile testing, bend testing, and radiographic inspection. The changes between the C– 3–1994, Fourth Edition and the C–3– 2005, Reaffirmed 2011, Seventh Editions were predominantly editorial or technical in nature. The significant VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 technical changes are summarized as follows and can be reviewed in detail in the docket to this petition: • Added section to the testing criteria to employ the use of macro etch samples in lieu of weld guided bend test and weld tensile testing when the cylinder size would not permit securing of proper size specimens. • Clarified the weld bend testing procedure, weld bend testing tooling, and proper clearances that are required in the tooling. • Clarified definitions for the welding procedure qualification and the welding operator weld qualification. • Added tolerance section to C–3– 2005, Reaffirmed 2011 that indicates the plus and minus tolerances when a specific dimensional tolerance is indicated in the publication. • Added drawings to the C–3–2005, Reaffirmed 2011 illustrating different weld joint designs. • Reviewed C–3–2005, Reaffirmed 2011 for conditional wording and revised it for enforceable wording. PHMSA identified approximately 5,000 companies that would be subject to this standard, with the majority being classified as small businesses using SBA size standards (<500 employees). This minor update to the regulations improves the timeliness and clarity of industry standards that are IBR. It supports the goal of facilitating voluntary compliance and reducing the burdens associated with references to outdated material. Therefore, in this NPRM, PHMSA is proposing these recommended changes. P–1629 The CGA submitted P–1629 requesting that PHMSA IBR CGA C–14– 2005, Reaffirmed 2010, Procedures for Fire Testing of DOT Cylinder Pressure Relief Device Systems, Fourth Edition, as a material incorporated by reference in the HMR. Presently, the HMR reference CGA C–14–1979, Procedures for Fire Testing of DOT Cylinder Pressure Relief Device Systems, First Edition. Since the incorporation of this edition, CGA has revised the publication in 1992, 1999, 2005, and reaffirmed the publication in 2010. This standard describes test procedures and apparatus for fire testing compressed gas cylinder safety (pressure) relief devices as was required by former § 173.34(d). The procedures are applicable for cylinders that are less than 500 pounds water capacity and designed to provide a means of testing to DOT requirements anywhere with reliable test data and repeatable test results. The changes from the 1979 First Edition to the 2005 and Reaffirmed 2010 PO 00000 Frm 00014 Fmt 4701 Sfmt 4702 editions of CGA C–14 were predominantly editorial or technical in nature. The significant technical changes are summarized as follows and can be reviewed in detail in the docket to this petition: • Permitted the use of an alternate lading. If the intended lading would present an increased safety hazard during the test procedure (such as the use of poisonous or flammable gas), the cylinder may be charged with a typical liquefied or non-liquefied gas. Gases with essentially similar physical properties may be classified as typical. • Added the Bonfire Test Method to the publication. This permitted the Board of Explosives (BOE) test method to be used to qualify pressure relief device systems. The Bonfire Test Method was successfully used to qualify pressure relief device systems for decades. • Clarified what information is to be recorded before and during the actual test. • Increased the water capacity of a cylinder that can be fire tested from 500 lb. water capacity to 1000 lbs. water capacity to permit a test method for all 4 series cylinders. • Reviewed C–14–2005, Reaffirmed 2010 for conditional wording and modified it to replace conditional wording with enforceable wording, wherever appropriate. PHMSA identified approximately 5,000 companies that would be subject to this standard, with the majority being classified as small businesses using SBA size standards (<500 employees). This minor update to the regulations improves the timeliness and clarity of industry standards that are IBR. It supports the goal of facilitating voluntary compliance and reducing the burdens associated with references to outdated material. Therefore, in this NPRM, PHMSA is proposing these recommended changes. P–1630 The CGA submitted P–1630 requesting that PHMSA revise the HMR requirements for DOT 4L welded insulated cylinders. Specifically, the CGA requests PHMSA make two changes: (1) Add a Definition for ‘‘Recondition’’ to § 180.203 The CGA states ‘‘[t]he term ‘recondition’ is distinct from work presently defined as repair or rebuild and describes work on a part or component of a DOT 4L welded insulated cylinder that does not involve repair or rebuilding of the inner containment vessel. For purposes of this E:\FR\FM\26JYP2.SGM 26JYP2 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules asabaliauskas on DSK3SPTVN1PROD with PROPOSALS petition, the inner containment vessel refers to the term cylinder as defined in § 171.8. In addition, DOT 4L welded insulated cylinder refers to that packaging defined in § 178.57.’’ The CGA did not propose language for the definition. The HMR prescribe the requirements for reconditioning DOT 4L cylinders in § 180.211, further specifying additional requirements for rebuilding DOT 4L cylinders in paragraph (e). ‘‘Recondition’’ is a word that describes a process that applies to several cylinder packaging types under the HMR. PHMSA is concerned that adding a definition for ‘‘recondition’’ that applies only to DOT 4L specification cylinders would cause confusion that may reduce the safe application of these regulations. Therefore, PHMSA is not proposing in this NPRM to define a ‘‘reconditioned cylinder’’ in § 180.203. (2) Amend Paragraphs §§ 180.211(c) and 180.211(e) To Clarify when a Hydrostatic Test Must Be Performed on the Inner Containment Vessel After the DOT 4L Welded Insulated Cylinder has Undergone Repair as Interpreted in DOT Letters of Interpretation Reference Nos. 11–0237 and 12–0065 Reference No. 11–0237 states: ‘‘[t]he term ‘rebuild’ is defined in § 180.203 as the replacement of a pressure part (e.g., a wall, head, or pressure fitting) by welding. While a ‘rebuild’ would be required when the inner vessel of a DOT–4 series cylinder is compromised, it is not the only scenario that would constitute a ‘rebuild.’ DOT–4 series cylinders requiring rebuild, as defined in § 180.203, must do so in conformance with § 180.211. In addition, DOT 4L cylinders must meet additional requirements for repair specified in § 180.211(e) including proof pressure testing each inner containment vessel at two times its service pressure. DOT 4L cylinders which undergo procedures that are not defined as a rebuild in § 180.203 are not subject to the requirements of § 180.203(e).’’ Reference No. 12–0065 states: ‘‘[t]he term ‘repair’ is defined in § 180.203 as a procedure for correction of a condemned cylinder that may involve welding. A repair is not limited to the correction of a condemned cylinder that has had only its inner vessel compromised; therefore, DOT–4 series cylinders requiring repair, as defined in § 180.203, must be done in conformance with § 180.211. In addition, DOT 4L cylinders must meet additional requirements for repair specified in § 180.211(c) including being pressuretested in conformance with the specifications under which the cylinder VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 was originally manufactured. DOT 4L cylinders which undergo procedures that are not defined as a repair in § 180.203 are not subject to the requirements of § 180.211(c) including the requirement to be pressure-tested in conformance with the specifications under which the cylinder was originally manufactured.’’ The CGA notes its understanding that these DOT interpretations ‘‘state that testing the inner containment vessel after reconditioning, as defined below, are relatively new and prior to these interpretations no such testing had taken place.’’ The CGA further notes that it ‘‘knows of no incidents related to the lack of such testing.’’ While the requirements the petitioner is referring to have existed since 2002 [67 FR 51626]—and prior to that to some extent in former § 173.34— PHMSA agrees with the petitioner that adding language to clarify when a rebuilt DOT 4L cylinder and its components need to be pressure tested would make this requirement easier to understand; therefore, PHMSA is revising § 180.211(c) to include the clarifying language about this requirement included in letter Reference No. 11–0237. The CGA further states its ‘‘purpose for requesting amendments to §§ 180.211(c) and 180.211(e) is to clarify that certain work on parts and components of a DOT 4L welded insulated cylinder other than the inner containment vessel does not require hydrostatic testing of the inner containment vessel. The addition and definition of the term ‘recondition’ with respect to these DOT 4L welded insulated cylinders identifies this work and enables verification of the integrity of such work using a pneumatic leak test at 90% of service pressure for which the DOT 4L welded insulated cylinder was designed and tested and by using a mass spectrometer detection system.’’ As previously stated, while this requirement has existed since 2002, PHMSA agrees with the petitioner that revising the language in § 180.211(e) to include the language in letter Reference No. 12–0065 would improve the understanding of this requirement and, thereby, possibly improve safety. In this NPRM, PHMSA is proposing to amend § 180.211(c) and (e) for clarification as petitioned. IV. Special Permits In the ANPRM, PHMSA considered proposing revisions to adopt certain special permits into the HMR. Specifically, PHMSA proposed changes based on DOT–SPs 12929, 13318, and 13599. We are no longer proposing PO 00000 Frm 00015 Fmt 4701 Sfmt 4702 48991 changes in this NPRM in association with these special permits because: (1) DOT–SP 12929 was determined not suitable for adoption under rulemaking HM–233F (80 FR 5340; January 30, 2015); and (2) DOT–SPs 13318 and 13599 were adopted under HM–233F (81 FR 3635; January 21, 2016). Since publication of the ANPRM, we have considered proposing revisions to the HMR based on adoption of DOT–SP 14237. For over ten years, PHMSA has authorized the use of certain non-bulk DOT-specification cylinders to transport specific adsorbed gases under special permits. DOT–SP 14237, first issued on December 22, 2006, is general in its application in that it does not require the use of drawings and applications for DOT-specification cylinders that are specific to one company. Adopting this special permit would reduce costs associated with application and management, while also increasing safety and expanding the use of DOTspecification cylinders for adsorbed gases. PHMSA is not aware of any incident or investigation concerning the performance of packaging and transport under this special permit since its issuance; therefore, PHMSA is proposing in this NPRM to adopt the special permit into the HMR. Furthermore, PHMSA added provisions to the HMR for shipping adsorbed gases in a final rule issued on January 7, 2015 [Docket No. PHMSA– 2013–0260 (HM–215M); 80 FR 1075] applicable to UN pressure receptacles. Specifically, these changes incorporated international standards designed to allow the transportation of certain gases when they are adsorbed onto a porous solid material in a non-bulk UN standard pressure receptacle. Two commenters to the HM–215M NPRM requested that PHMSA also permit adsorbed gases in DOT-specification cylinders. One commenter, Entegris, Inc., proposed regulatory text that includes DOT cylinder specifications and provisions not previously authorized under DOT special permit. PHMSA chose not to accept the comment and did not adopt the changes at that time; however, PHMSA invites the public to review Entegris, Inc.’s comments under Docket No. PHMSA– 2013–0260 at www.regulations.gov and to comment on the safety and costs associated with its proposal and its possible inclusion under new § 173.302d. V. Agency Initiated Editorial Corrections In an ongoing attempt to improve safety, PHMSA regularly reviews and revises the HMR to correct errors and E:\FR\FM\26JYP2.SGM 26JYP2 48992 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules clarify any regulations that are unclear or confusing. PHMSA is adopting the following issues of concern into this NPRM and seeks comment regarding the changes. Section 107.803 Section 107.803 provides approval procedures for independent inspection agencies (IIA) conducting cylinder inspections and verifications as required by parts 178 and 180. In its application for approval status, the IIA must provide information, including a detailed description of its qualifications and ability both to perform and to verify inspections. However, at present, the application information requirements of § 107.803(c)(3) only reference part 178. In this NPRM, PHMSA is proposing to revise § 107.803(c)(3) to include part 180, subpart C for consistency. Section 107.805 Section 107.805 provides approval procedures for persons to inspect, test, certify, repair, or rebuild a cylinder in accordance with the HMR. PHMSA is proposing to revise the requirements for application for approval of cylinder requalifiers to include a reference to the option of having a mobile cylinder requalification unit (i.e., a mobile unit). See § 180.203 for further discussion. asabaliauskas on DSK3SPTVN1PROD with PROPOSALS Section 178.70 Section 178.70 provides approval for the manufacture of UN pressure receptacles (i.e., cylinders). Current § 178.70(d) restricts the user (manufacturer) from the flexibility that is provided in the UN/ISO standards. The regulation as constructed results in additional cost and delay without any added safety. The UN/ISO standards are developed based on performance testing and include adequate testing for a wide range of design-type modifications. All UN/ISO standards to which the original design type conforms permit certain modifications to an approved design type. PHMSA has received several requests to revise this regulation to allow an authorized manufacturer to benefit from the UN Model Regulations and produce UN/ISO cylinders. In this NPRM, PHMSA is proposing to adopt language consistent with UN/ISO standards to reduce the need for approvals. Section 180.203 Section 180.203 specifies definitions that apply to cylinder use, qualification, and maintenance. PHMSA has encountered frequent problems regarding this section and is recommending the following revisions: VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 (1) Define and Incorporate ‘‘Mobile Unit’’ Requalification Operations The hazardous materials program procedures of 49 CFR part 107 for approval of cylinder requalifiers do not specify the option of a ‘‘mobile cylinder requalification unit.’’ The intent of this operation is for a cylinder requalifier to be able to perform its requalifying function within a 100-mile radius of its primary place of business. To operate, a mobile cylinder requalifier must adhere to the requirements in a PHMSA-issued approval letter. Since companies may not be familiar with the option to offer mobile testing of cylinders to their customers through an approval by the Associate Administrator, PHMSA is proposing in this NPRM to add a definition of ‘‘mobile unit’’ to the HMR in § 180.203 and a new paragraph in § 107.805 identifying application requirements for mobile units. These proposed revisions would enhance requalifiers’ ability to perform cylinder requalifications under the scope of the HMR. (2) Revise Definition of Proof Pressure Test for Cylinders The HMR no longer prescribe modified hydrostatic pressure testing, which has been and continues to be the method of low-pressure testing of fire extinguishers. Not all retesters know that proof pressure testing allows the test to be performed with just air (no water), therefore taking approximately one-third the time of a modified hydro test without wasting water. The required test is only looking for leaks not determining a cylinder expansion percentage rate. We expect that use of a proof pressure will pass along cost savings to a requalifier. The HMR prescribes in § 180.209(e) (for DOT 4-series cylinders) and (j) (for fire extinguishers) that a proof pressure test is authorized. In § 180.203, proof pressure test is defined as ‘‘a pressure test by interior pressurization without the determination of expansion of the cylinder’’ (i.e., a leak test). In this NPRM, PHMSA is proposing to revise the definition of proof pressure test to specify that a liquid or a gas may be used to conduct the test. However, we note that the safety risk for conducting this test is substantially more using gas such as air versus a liquid such as water although this risk is lessened for lowpressure cylinders such as fire extinguishers. We seek comment on the impact of this revision and whether this clarification achieves the intent of enhancing compliance by specifying the air may be used for a proof pressure test. We also invite comment on a better PO 00000 Frm 00016 Fmt 4701 Sfmt 4702 method for communicating that a gas may be used for a proof pressure test, preferrable for low-pressure cylinders. Section 180.207 Section 180.207(d) authorizes the use of ISO 6406 to requalify UN refillable seamless steel cylinders and UN refillable seamless steel tube cylinders. The current ISO 6406 has a limitation of 150 liters for the size of these cylinders, which is substantially less than the maximum volume of a UN refillable seamless steel tube (3,000 liters). PHMSA has received several requests for interpretation of this regulation and its application to the requalification of UN seamless steel pressure receptacles larger than 150 liters. PHMSA responded to these requests through a letter of clarification issued under Reference No. 13–0146, stating that § 180.207(d)(1) authorizes the requalification of seamless steel UN pressure receptacles larger than 150 liters. In addition, PHMSA Engineering staff is participating in an ISO/TC58/ SC4 working group that is considering a revision to the ISO 6406 standard to include pressure receptacles larger than 150 liters; therefore, PHMSA is proposing in this NPRM to add the phrase ‘‘larger than 150 liters’’ after ‘‘including MEGC’s pressure receptacles’’ to clarify that the use of larger UN pressure receptacles is permitted under § 180.207(d)(1). Section 180.213 Section 180.213 prescribes marking requirements for the visual inspection of cylinders (see § 180.213 paragraphs (f)(5), (f)(8), and (f)(9)). In the past, PHMSA has allowed a visual (V) requalifier identification number (i.e., a V number) to be marked in the same manner as a requalifier identification number (RIN) marking per § 180.213. V number markings have four different options for markings; however, PHMSA issues approval letters that permit a V number marking yet only provide three of the four available marking options and do not reference § 180.213. Section 180.213 of the HMR should include the marking requirements for a V number consistent with those for an RIN. The V number could be placed in a square pattern as shown in § 180.213. However, marking a V number, which is a single letter followed by six numbers, in a square pattern like an RIN, which is a single letter followed by three numbers, requires clarification, as the marks vary. Including the marking requirements for V numbers into § 180.213 will make authorized options for these identifiers to be placed on a cylinder more widely understood. E:\FR\FM\26JYP2.SGM 26JYP2 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules PHMSA is proposing in this NPRM to include this V number marking in § 180.213(g). Section 180.215 Section 180.215(a)(6) requires that a person who requalifies, repairs, or rebuilds cylinders must maintain in their records and report information contained in each applicable CGA or ASTM standard incorporated by reference under § 171.7 of the HMR that applies to requalifier activities. In this NPRM, PHMSA is proposing to remove the last sentence of paragraph (a)(6) of this section to reduce confusion, as it essentially repeats what is requested in the first sentence of this paragraph. VI. Section-by-Section Review Section 107.803 Section 107.803(c)(3) states that each application to obtain approval to perform duties as an IIA must contain a detailed description of the applicant’s qualifications and ability both to perform the inspections and to verify the inspections required by part 178 of the HMR or under the terms of a DOT special permit. In this NPRM, we propose to revise § 107.803(c)(3) to clarify that the applicant’s description of his or her ability to perform and verify inspections must include those required under 49 CFR part 180, subpart C. asabaliauskas on DSK3SPTVN1PROD with PROPOSALS Section 107.805 Section 107.805(c) prescribes additional information an application must contain to obtain approval from PHMSA to requalify cylinders and pressure receptacles. In this NPRM, we propose to add paragraph (c)(5) to this section to clarify what information must be added to the application to authorize mobile unit requalifiers and the information necessary to acquire approval. We also propose to make a conforming edit to paragraphs (c)(3) and (c)(4) by moving the ‘‘and’’ clause from paragraph (c)(3) to (c)(4). Section 171.7 Section 171.7 lists reference standards and regulations incorporated by reference into the HMR that are not specifically set forth in the HMR. Paragraph (g) incorporates into the HMR publications issued by the American Society of Mechanical Engineers, specifically, the ASME Boiler and Pressure Vessel Code. In this NPRM, we propose to revise the list of sections in paragraph (g)(1) to include § 173.302d based on the addition of this new section to the HMR and its reference to this standard in § 173.302d(b)(11). Also, paragraph (n) specifically incorporates VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 into the HMR publications issued by the Compressed Gas Association, an industrial and medical gas association that, among others, develops standards and practices for the safe transportation of gases and their containers. In this NPRM, we propose to add to § 171.7(n) the latest CGA publication C–1, Methods for Pressure Testing Compressed Gas Cylinders. We also propose to update the editions of CGA publications C–3, C–6, C–14, and S–1.1 already incorporated in the HMR. The remaining changes to paragraph (n) are editorial based on PHMSA’s initiative to renumber the list to accommodate the new publications and add missing section number symbols, punctuation, and spaces. Also, note a weblink in the ADDRESSES section of the introduction to this rulemaking to review these publications during the comment period. The documents are summarized below. The ASME publication is 2015 ASME Boiler and Pressure Vessel Code (ASME Code) Section VIII—Rules for Construction of Pressure Vessels Division 1. The publication provides requirements applicable to the design, fabrication, inspection, testing, and certification of pressure vessels operation at either internal or external pressures exceeding 15 psig. Division 1 also contains mandatory and nonmandatory appendices detailing supplementary design criteria, nondestructive examination and inspection acceptance standards. During the open comment period of this NPRM, this publication is freely available on the ASME Web site at: https:// go.asme.org/PHMSA-ASME-PRM. The Compressed Gas Association publications include the following: (1) CGA C–1, Methods for Pressure Testing Compressed Gas Cylinders (2016). During the open comment period of this NPRM, this publication is freely available on the CGA Web site at: https://www.cganet.com/customer/ dot.aspx. This publication provides the standard(s) for pressure testing of compressed gas cylinders for many newly manufactured cylinders and requalification of cylinders. This standard contains operating and equipment requirements necessary to perform pressure testing of compressed gas cylinders properly. Tests include the water jacket method, direct expansion method, and proof pressure method. (2) CGA C–3, Standards for Welding on Thin-Walled Steel Cylinders (2005) (Reaffirmed 2011). During the open comment period of this NPRM, this publication is freely available on the CGA Web site at: https:// www.cganet.com/customer/dot.aspx. PO 00000 Frm 00017 Fmt 4701 Sfmt 4702 48993 This publication contains information on welding process qualification, welding operator qualifications, tensile testing, bend testing, and radiographic inspection. Additionally, this publication clarifies dimensional tolerances and when weld macro etch can be used for weld process approval and welder qualification approval. (3) CGA C–6, Standards for Visual Inspection of Steel Compressed Gas Cylinders (2013). During the open comment period of this NPRM, this publication is freely available on the CGA Web site at: https:// www.cganet.com/customer/dot.aspx. This publication provides cylinder users (requalifiers, owners, fillers, operators, etc.) with criteria to accept, reject, and condemn steel compressed gas cylinders. This standard does not cover all circumstances for each individual cylinder type and condition of lading. Inspection procedures include preparation of cylinders for inspection, exterior inspection, interior inspection (if required), nature and extent of damage to be looked for, and for some tests, the conditions of the cylinder, etc. A sample inspection report is provided in an appendix. (4) CGA C–14, Procedures for Fire Testing of DOT Cylinder Pressure Relief Device Systems (2005) (Reaffirmed 2010). During the open comment period of this NPRM, this publication is freely available on the CGA Web site at: https://www.cganet.com/customer/ dot.aspx. This publication describes test procedures and apparatus for fire testing compressed gas cylinder safety (pressure) relief devices as required by the HMR. The procedures are applicable for cylinders that are less than 500 lbs. water capacity and designed to provide a means of testing to the HMR anywhere with reliable test data and repeatable test results. (5) CGA S–1.1, Pressure Relief Device Standards—Part 1—Cylinders for Compressed Gases (2011). During the open comment period of this NPRM, this publication is freely available on the CGA Web site at: https:// www.cganet.com/customer/dot.aspx. This publication provides the standard(s) for selection of the correct pressure relief device that is required to meet the requirements of the HMR for over 150 gases. It provides guidance on when a pressure relief device can be optionally omitted, and when the use of a pressure relief device is prohibited. It provides direction and guidance on the manufacture and testing of pressure relief devices as well as the operation parameters and maintenance. E:\FR\FM\26JYP2.SGM 26JYP2 48994 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules Section 171.23 Section 171.23 prescribes requirements for transport of specific materials and packaging under international transportation standards such as the International Civil Aviation Organization Technical Instructions for the Safe Transport of Dangerous Goods by Air. Paragraph (a)(4) outlines requirements for filling of cylinders for export or use onboard a vessel. In this NPRM, we propose to revise the marking requirements consistent with changes made to § 180.213. Section 172.400a Section 172.400a(a)(1) prescribes exceptions from labeling for Dewar flasks or cylinders that comply with the provisions of this paragraph and are durably marked and labeled in conformance with CGA C–7. In this NPRM, we propose to revise paragraph (a)(1) to clarify how this labeling exception applies to overpacks. asabaliauskas on DSK3SPTVN1PROD with PROPOSALS Section 173.3 Section 173.3(d)(1) prescribes how a damaged or leaking cylinder that contains hazardous material may be transported in a non-DOT-specification fully opening hinged-head or removable head steel salvage cylinder. In this NPRM, we propose to permit cylinders that contain Class 4 or 5 materials to also use this exception. In addition, because of the proposal to include Class 4 or 5 materials as authorized material for salvage cylinders, we are reformatting the regulatory text to reference those materials in damaged or leaked cylinders that are excluded from being allowed to be overpacked in a salvage cylinder rather than listing those that are authorized. Section 173.301 Section 173.301 provides the general requirements for shipment of compressed gases and other hazardous material in cylinders. In this NPRM, we propose to clarify the marking requirements of paragraph (a)(9), specifically use of the ‘‘OVERPACK’’ mark to indicate the combination packaging contains inner packagings that conform to specifications. Additionally, in paragraphs (c) and (f), we propose an editorial revision to the section citation of CGA S–1.1 to correctly read 9.1.1. Finally, we propose to revise paragraph (f) to clarify the minimum burst pressure requirements for DOT 39 cylinders used to transport compressed or liquefied oxidizing gases. Section 173.302 Section 173.302(a)(2) prescribes the requirements for adsorbed gases. In this VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 NPRM, we propose to include references to new § 173.302d applicable to DOT-specification cylinders and to replace reference to ‘‘UN cylinders’’ with ‘‘UN pressure receptacles’’ for consistency with other parts of the HMR. Section 173.302a Section 173.302a(a)(3) prescribes the filling requirements for DOT 39 cylinders that contain Division 2.1 gas or chemical under pressure. In this NPRM, we propose to clarify the capacity (internal volume) requirements to make it clear that the 1.23 L limit applies to Division 2.1 material and the 50 L limit applies to chemical under pressure classed as Division 2.1 (see § 172.102, special provision 362). We also propose an editorial correction to the start of paragraph (a)(3) by removing the non-italicized ‘‘DOT 39.’’ Section 173.302d In this NPRM, we propose to add new § 173.302d prescribing requirements for transportation of adsorbed gases in DOT-specification cylinders. The requirements of this new section are based on the adoption of special permit DOT–SP 14237 provisions. Section 173.304a Section 173.304a prescribes the maximum permitted filling density and authorized cylinders for specific gases. In this NPRM, we propose to add new paragraph (a)(3) to § 173.304a to clearly state that the maximum capacity (internal volume) of a DOT 39 cylinder containing liquefied flammable gas is 1.23 liters (75 in3). We also propose to require these cylinders to be equipped with a pressure relief valve, as prescribed in CGA S–1.1, unless the material is not listed in CGA S–1.1, in which case a CG–7 pressure relief valve must be used. Section 173.306 Section 173.306 provides exceptions from the requirements of the HMR for limited quantities of compressed gas. Paragraph (g) excepts water pump system tanks charged with compressed air or limited quantities of nitrogen to not over 40 psig from labeling and specification packaging when shipped in conformance with the requirements prescribed in the paragraph. In this NPRM, we propose to revise § 173.306(g) to authorize tanks to be tested to current standards in the HMR or the manufacturer’s specified maximum working pressure, to allow water pump system tanks to be charged with helium, to clarify that PO 00000 Frm 00018 Fmt 4701 Sfmt 4702 transportation by aircraft is not an authorized mode of transport. Section 173.309 In this NPRM, we propose to revise § 173.309 to state that the requirements applicable to fire extinguishers also apply to those cylinders used as part of a fire suppression system. Section 173.312 Section 173.312(b)(1) prescribes the filling requirements for multiple element gas containers (MEGCs). In this NPRM, we propose requirements for filling pressure receptacles containing liquefied compressed gas by weight. Section 178.35 Section 178.35(f) prescribes the marking requirements that apply to DOT-specification cylinders. In this NPRM, we propose to add new paragraph (f)(7) to § 178.35 to require that cylinder tare weight or mass weight, and water capacity, be marked on certain DOT-specification cylinders filled by weight. Sections 178.36, 178.37, 178.38, 178.39, 178.42, 178.44, 178.45, 178.46, 178.47, 178.50, 178.51, 178.53, 178.55 178.56, 178.57, 178.58, 178.59, 178.60, 178.61, 178.65, and 178.68 These sections prescribe the DOTspecification requirements for a cylinder type including the performance standards for pressure testing of the cylinder. In this NPRM, we propose to require that testing and equipment used to conduct the pressure testing be in conformance with CGA C–1, Methods for Pressure Testing Compressed Gas Cylinders, to provide for consistency and clarity in performance of pressure testing. We also propose to revise the format of the pressure testing paragraphs for greater consistency. Sections 178.50, 178.51, 178.61, and 178.68 These sections prescribe DOT 4-series specification requirements. These specifications are often unclear to manufacturers and enforcement personnel. In this NPRM, we propose to revise the specification requirements to promote consistent and uniform manufacturing practices for DOT 4series cylinders. Section 178.70 Section 178.70(d) prescribes the requirements to obtain design approval of a UN pressure receptacle. In this NPRM, we propose to revise paragraph (d) to include language that an approval for a design modification is not required if the specific design modification is E:\FR\FM\26JYP2.SGM 26JYP2 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules covered under the UN/ISO standard for the design type already approved. Section 180.203 Section 180.203 prescribes definitions that apply to the qualification, maintenance, and use of cylinders under the HMR. In this NPRM, we propose to add new definitions for the terms or phrases ‘‘accuracy,’’ ‘‘accuracy grade,’’ ‘‘actual test pressure,’’ ‘‘calibrated cylinder,’’ ‘‘error,’’ ‘‘master gauge,’’ ‘‘mobile unit,’’ ‘‘overpressurized,’’ ‘‘percent permanent expansion,’’ ‘‘precision,’’ ‘‘proof pressure test,’’ ‘‘reference gauge,’’ and ‘‘service pressure’’; and revise the definitions for ‘‘commercially free of corrosive components,’’ ‘‘defect,’’ and ‘‘test pressure.’’ These proposed definitions will clarify the cylinder requirements prescribed in 49 CFR part 180, subpart C. asabaliauskas on DSK3SPTVN1PROD with PROPOSALS Section 180.205 Section 180.205 prescribes the general requirements for requalifying DOTspecification cylinders. In this NPRM, we propose to revise and add new regulatory text for clarity. Specifically, we propose to clarify the conditions requiring test and inspection of cylinders under paragraph (d) by including a reference to evidence of grinding; revise the paragraph (f) visual inspection requirements to include reference to shot blasting and ‘‘chasing’’ of cylinders; clarify and revise the paragraph (g) retest equipment tolerances for consistency with ISO standards 6406 and 10461 (i.e., standards for periodic inspection and testing of gas cylinders) which are both incorporated by reference in the HMR in § 180.207 to allow for broader use of retest equipment (we invite comment on this course of action relative to the tolerances provided for in CGA C–1); revise the paragraph (i) cylinder condemnation requirements to clarify the responsibilities of the requalifier and add conditions under which a cylinder must be condemned; and include a reference to training materials, under new paragraph (j), that are suitable for training persons who requalify cylinders using the volumetric expansion test method. Section 180.207 Section 180.207 prescribes requirements for requalifying UN pressure receptacles. In this NPRM, we propose to revise and add new regulatory text for clarity. Specifically, we propose to clarify the language prohibiting the use of a UN pressure receptacle beyond its service life by, for example, removing approval VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 authorization language; to revise the requalification procedures for seamless steel cylinders to include MEGC pressure receptacles larger than 150 liters water capacity; and to revise the requalification schedule for dissolved acetylene UN cylinders to be requalified no sooner than five years and no later than ten years from the date of manufacture. Section 180.209 Section 180.209 prescribes requirements for requalifying specification cylinders. In this NPRM, we propose to revise and add new regulatory text for clarity; and to incorporate the current version of CGA C–1, Methods for Pressure Testing Compressed Gas Cylinders. Specifically, we propose to revise the paragraph (a) table 1 to include reference to the paragraph (e) conditions for an alternate requalification period; the paragraph (b) conditions for star-marking of a DOT 3A or 3AA cylinder; and the paragraph (m) requalification conditions for DOT 3AL cylinders made of 6351–T6 aluminum alloy. Section 180.211 Section 180.211 prescribes requirements to repair, rebuild, and reheat treat DOT–4 series specification cylinders. In this NPRM, we propose to clarify that the requirements to repair DOT 4L cylinders in paragraph (c) of this section are for rebuilding the cylinders and to clarify paragraph (e) for when a hydrostatic test may be performed on the inner containment vessel of a DOT 4L welded insulated cylinder. We do not propose in this NPRM to add a definition for ‘‘recondition’’ to § 180.203 because of our concern that adding this definition for only DOT 4L cylinders might cause further confusion and reduce safety. 48995 cylinder is prohibited. Additionally, we propose to clarify the marking requirements for foreign cylinders filled for export under paragraph (d) and to include two new marking requirements under paragraph (f) for designation of grinding with ultrasonic wall thickness examination and for designation of requalification of a foreign cylinder requalified in conformance with §§ 171.23(a)(4) and 180.209(l) of this subchapter. Finally, we propose to add visual inspection identifier number marking requirements under a new paragraph (g). Section 180.215 Section 180.215 prescribes reporting and retention requirements for a person who requalifies, repairs, or rebuilds cylinders. In this NPRM, we propose to clarify what information these documents must contain. 49 CFR Part 180, Appendix C Part 180, appendix C prescribes the requirements eddy current examination equipment must meet to inspect DOT 3AL, 6351–T6 aluminum alloy cylinders. In this NPRM, we propose to retitle the appendix and revise paragraph 1 for clarity regarding equipment calibration procedures when conducting eddy current examination. VII. Regulatory Analyses and Notices Section 180.212 Section 180.212(a) prescribes requirements to repair seamless DOT 3series specification cylinders and seamless UN pressure receptacles. In this NPRM, we propose to require an ultrasonic examination on DOT 3-series cylinders and seamless UN pressure receptacles after any grinding is performed on these cylinders. A. Statutory/Legal Authority for This NPRM Federal Hazardous Materials Transportation Law (49 U.S.C. 5101– 5128) authorizes the Secretary of Transportation to ‘‘prescribe regulations for the safe transportation, including security, of hazardous material in intrastate, interstate, and foreign commerce.’’ Section 5117(a) authorizes the Secretary to issue a special permit exempting compliance with a regulation prescribed in §§ 5103(b), 5104, 5110, or 5112 ‘‘to a person transporting, or causing to be transported, hazardous material in a way that achieves a safety level at least equal to the safety level required under [the Federal hazmat law], or consistent with the public interest . . . if a required safety level does not exist.’’ The issues described in this NPRM respond to 20 outstanding petitions for rulemaking. Section 180.213 Section 180.213 prescribes requirements for marking DOTspecification cylinders and UN pressure receptacles that are successfully requalified. In this NPRM, we propose to revise the requalification marking method to clarify the steps involved and that stamping the sidewall of the B. Executive Order 12866, Executive Order 13563, and DOT Regulatory Policies and Procedures This NPRM is not considered a significant regulatory action under section 3(f) of Executive Order 12866 (‘‘Regulatory Planning and Review’’) and was not reviewed by the Office of Management and Budget (OMB). PO 00000 Frm 00019 Fmt 4701 Sfmt 4702 E:\FR\FM\26JYP2.SGM 26JYP2 asabaliauskas on DSK3SPTVN1PROD with PROPOSALS 48996 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules Neither was it considered a significant rule under the Regulatory Policies and Procedures order issued by the Department of Transportation [44 FR 11034]. Executive Order 13563 (‘‘Improving Regulation and Regulatory Review’’) is ‘‘supplemental to and reaffirms the principles, structures, and definitions governing regulatory review that were established in Executive Order 12866 of September 30, 1993.’’ In addition, Executive Order 13563 specifically requires agencies to: (1) Involve the public in the regulatory process; (2) promote simplification and harmonization through interagency coordination; (3) ‘‘identify and consider regulatory approaches that reduce burdens and maintain flexibility’’; (4) ensure the objectivity of any scientific or technological information used to support regulatory action; and (5) consider how to best promote retrospective analysis to modify, streamline, expand, or repeal existing rules that are outmoded, ineffective, insufficient, or excessively burdensome. PHMSA has involved the public in the regulatory process by (1) addressing issues identified for possible future rulemaking in letters of interpretation and other correspondence, and (2) responding to 20 petitions for rulemaking submitted by stakeholders in the compressed gas industry in conformance with 49 CFR 106.95. Overall, the issues discussed in this NPRM promote the continued safe transportation of hazardous materials while producing a net benefit. These petitions clarify the existing regulatory text in the HMR, incorporate widely used industry publications, and address specific safety concerns, thus enhancing the safe transportation of compressed gases while limiting the impact on the regulated community. Incorporating the provisions of special permits into regulations with general applicability will provide shippers and carriers with additional flexibility to comply with established safety requirements, thereby reducing burdens and costs and increasing productivity. Further, PHMSA on its own initiative is clarifying existing regulatory language to reduce misunderstandings that will thereby improve safety. Some of the proposed changes are summarized below, by topic. Incorporating Updated CGA C–6, Visual Inspection of Steel Cylinders PHMSA proposes to replace the currently incorporated Seventh Edition of the CGA publication C–6, Standards for Visual Inspection of Steel Compressed Gas Cylinders with the VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 revised Eleventh Edition and update the appropriate references throughout the HMR. Under the HMR, compressed gas cylinders must be visually inspected as part of the requalification process once every five years. CGA C–6 serves as a guide to cylinder requalifiers and users for establishing cylinder inspection procedures and standards. The Tenth Edition provides updated and enhanced guidance on the inspection of multielement gas containers, cylinder thread inspection for cylinders used in corrosive gas service, and clarified maximum allowable depths and measuring techniques for various types of corrosion. PHMSA identified approximately 5,000 companies that would be subject to this standard. The majority of these companies are classified as small businesses using SBA size standards. This revision would impose a one-time individual cost for purchase of the updated standard. We assume that the majority of companies subject to this standard are non-CGA members or nonCGA subscribers. Assuming approximately 5,000 companies purchase the Eleventh Edition of CGA– 6, we estimate the upper bound of the total cost across all affected entities for this proposal would be approximately $710,000. The benefit of this change is that it would improve the clarity of industry standards that are currently incorporated by reference. It facilitates voluntary compliance and reduces the burdens associated with references to outdated material. PHMSA believes that these changes may yield an incremental improvement to the overall safety of hazmat cylinder transportation. In comments made to the ANPRM, five stakeholders support the proposal to update the IBR of CGA C–6 to the Tenth Edition. No commenters objected to the proposal or provided benefit data. Incorporating CGA C–1 Methods of Pressure Testing Compressed Gas Cylinders Into the HMR PHMSA proposes to revise the HMR regarding the retesting of cylinders using pressure testing. The HMR is often perceived as unclear on procedures and requirements for pressure testing of cylinders. Incorporating by reference CGA C–1, Methods for Pressure Testing Compressed Gas Cylinders clarifies ambiguities in the HMR. It is estimated that this would affect approximately 980 entities that conduct pressure testing, including cylinder requalifiers, retesters, and manufacturers. PHMSA estimates a onetime compliance cost of $186 for each PO 00000 Frm 00020 Fmt 4701 Sfmt 4702 entity purchasing the Eleventh Edition of CGA C–1. The upper bound of the total cost across all affected entities for this proposal would be approximately $182,280. Actual costs are expected to be lower, as some of the 980 entities may be members, subscribers, or already own the revised edition. Revising the HMR to incorporate CGA C–1 would increase clarity, reduce confusion, provide enhanced guidance, and provide marginal safety benefits without imposing requirements that are potentially costly or difficult. Weight Marking Requirements for Filling of DOT 4-Series Specification Cylinders PHMSA proposes to require newly manufactured DOT 4B, 4BA, 4BW, and 4E cylinders to be marked with the tare weight or the mass weight and the water capacity. Accurate cylinder tare weight, or mass weight, and water capacity are crucial for safe filling and transportation of cylinders containing liquefied compressed gas. Overfilled cylinders have the potential for leakage and possible failure during transport. PHMSA identified six U.S. based manufacturers of the cylinders. Five of these companies are classed as small businesses using SBA size standards. The HMR already incorporate by reference NFPA 58, LP Gas Code, which requires cylinders used for liquefied petroleum gases to be marked with the tare weight and water capacity. The NFPA 58 does not specify how the cylinders must be marked, nor does it specify by whom. Further, NFPA 58 only addresses liquefied petroleum gas, not all liquefied compressed gases. We do not anticipate significant additional costs to DOT 4-series-specification cylinders, manufacturers, or owners, because many in the liquefied compressed gas industry already request that manufacturers mark cylinders with this additional information as an added safety measure. Clarify Filling Limits on Multiple Element Gas Containers PHMSA proposes to clarify filling limits for a liquefied compressed gas in a manifold comprised of DOTspecification cylinders or a multiple element gas container (MEGC). Specifically, liquefied compressed gases contained in manifold cylinders cannot exceed the filling densities specified in § 173.304a(a)(2) and liquefied gases in MEGCs comprised of UN pressure receptacles must not exceed the values contained in P200 as specified in § 173.304b. This proposed change will remove the discrepancy between the set pressure E:\FR\FM\26JYP2.SGM 26JYP2 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules specified in CGA S–1.1 and the differing set pressures prescribed in §§ 173.302(f)(2) and 173.304(f)(2). This revision would not impose any new costs on affected industries, and although the proposed revision restates a requirement from another section in the HMR, we believe it would provide additional protection against overfilling of a cylinder. This change would promote regulatory compliance and foster safe filling practices. asabaliauskas on DSK3SPTVN1PROD with PROPOSALS C. Executive Order 13132 This proposed rule has been analyzed in accordance with the principles and criteria contained in Executive Order 13132 (‘‘Federalism’’) and the President’s memorandum (‘‘Preemption’’) that was published in the Federal Register on May 22, 2009 [74 FR 24693]. This proposed rule will preempt State, local, and Native America tribal requirements but does not propose any regulation that has substantial direct effects on the States, the relationship between the national government and the States, or the distribution of power and responsibilities among the various levels of government. Therefore, the consultation and funding requirements of Executive Order 13132 do not apply. The Federal Hazardous Materials Transportation Law, 49 U.S.C. 5101– 5128, contains an express preemption provision [49 U.S.C. 5125 (b)] that preempts State, local, and Native American tribal requirements on the following subjects: (1) The designation, description, and classification of hazardous materials; (2) The packing, repacking, handling, labeling, marking, and placarding of hazardous materials; (3) The preparation, execution, and use of shipping documents related to hazardous materials and requirements related to the number, contents, and placement of those documents; (4) The written notification, recording, and reporting of the unintentional release in transportation of hazardous material; and (5) The design, manufacture, fabrication, marking, maintenance, recondition, repair, or testing of a packaging or container represented, marked, certified, or sold as qualified for use in transporting hazardous material. PHMSA invites those with an interest in the issues presented in this NPRM to comment on the effect the adoption of specific proposals may have on State or local governments. VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 D. Executive Order 13175 This NPRM was analyzed in accordance with the principles and criteria contained in Executive Order 13175 (‘‘Consultation and Coordination with Indian Tribal Governments’’). Because this NPRM does not have tribal implications and does not impose substantial direct compliance costs on Native American tribal governments, the funding and consultation requirements of Executive Order 13175 do not apply, and a tribal summary impact statement is not required. We invite Native American tribal governments to provide comments on the effect the adoption of specific proposals may have on Indian communities. E. Regulatory Flexibility Act, Executive Order 13272, and DOT Procedures and Policies The Regulatory Flexibility Act (5 U.S.C. 601 et seq.) requires an agency to review regulations to assess their impact on small entities unless the agency determines that a rule is not expected to have a significant impact on a substantial number of small entities. The term ‘‘small entities’’ comprises small businesses and not-for-profit organizations that are independently owned and operated and are not dominant in their fields and governmental jurisdictions with populations of less than 50,000. (See 5 U.S.C. 601.) This notice has been developed in accordance with Executive Order 13272 (‘‘Proper Consideration of Small Entities in Agency Rulemaking’’) and DOT’s Policies and Procedures to promote compliance with the Regulatory Flexibility Act to ensure that potential impacts of draft rules on small entities are properly considered. Section 603(b) of the Regulatory Flexibility Act requires an analysis of the possible impact of the proposed rule on small entities, including the need for the rule, the description of the action, the identification of potentially affected small entities, the reporting and recordkeeping requirements, the related Federal rules and regulations, and the alternative proposals considered. Such analysis for this NPRM is as follows: 1. Need for the NPRM Current requirements for the manufacture, use, and requalification of cylinders can be traced to standards first applied in the early 1900s. Over the years, the regulations have been revised to reflect advancements in transportation efficiency and changes in the national and international economic environment. This NPRM is part of a retrospective analysis to modify and PO 00000 Frm 00021 Fmt 4701 Sfmt 4702 48997 streamline existing requirements that are outmoded, ineffective, insufficient, or excessively burdensome. This rulemaking also introduces new provisions suggested or developed by industry representatives, industry groups that develop standards, or international regulatory bodies. 2. Description of Action This NPRM considers incorporating the provisions of one special permit, responds to 20 petitions for rulemaking, considers clarifying other requirements in the HMR, and addresses areas of concern that are currently left out of the HMR. The amendments discussed in this NPRM are designed to increase flexibility for the regulated community, promote technological advancement, and facilitate international transportation while maintaining a comparable level of safety. 3. Identification of Potentially Affected Small Entities The amendments considered here are likely to affect cylinder manufacturers (NAICS code 332420; approximately 568 companies); cylinder requalifiers; independent inspection agencies; commercial establishments that own and use DOT-specification cylinders and UN pressure receptacles; and individuals who export non-UN/ISO compressed gas cylinders (NAICS codes 32512, 336992, 423450, 423850, 423990, 454312, 541380). Nearly all of these companies, particularly cylinder requalification facilities of which there are approximately 5,000, are small entities based on the criteria developed by the Small Business Administration. 4. Reporting and Recordkeeping Requirements This NPRM does not include any new reporting or recordkeeping requirements. 5. Related Federal Rules and Regulations The Occupational Safety and Health Administration (OSHA) prescribes requirements for the use, maintenance, and testing of portable fire extinguishers in 29 CFR 1910.157 and requirements for fixed fire suppression systems in 29 CFR 1910.160. The issues discussed in this NPRM pertaining to the transportation of fire extinguishers and compressed gas cylinders that are a component of a fixed fire suppression system do not conflict with the requirements in 29 CFR. With respect to the transportation of compressed gases in cylinders, there are not related rules or regulations issued by other E:\FR\FM\26JYP2.SGM 26JYP2 48998 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules departments or agencies of the Federal government. 6. Alternative Proposals for Small Business Certain regulatory actions may affect the competitive situation of an individual company or group of companies by imposing relatively greater burdens on small, rather than large, enterprises. PHMSA requests comments from small entities on the impacts of these additional requirements. asabaliauskas on DSK3SPTVN1PROD with PROPOSALS 7. Conclusion This NPRM requests information that will be used to develop a proposal to amend provisions of the HMR addressing the manufacture, maintenance, and use of cylinders. PHMSA anticipates that the proposals in this NPRM will reduce burdens for most persons and any costs resulting from adoption of new requirements will be offset by the benefits derived from eliminating the need to apply for special permits, increasing regulatory flexibility, and improving safety through enhanced compliance. If your business or organization is a small entity and the adoption of the proposals contained in this NPRM could have a significant economic impact on your operations, please submit a comment explaining how and to what extent your business or organization could be affected. F. Paperwork Reduction Act This NPRM does not impose new information collection requirements. Depending on the results of our request for comments to this NPRM, there may be a decrease in the annual burden and costs under OMB-proposed changes to incorporate provisions contained in certain widely used or longstanding special permits with an established safety record. PHMSA specifically requests comments on the information collection and recordkeeping burdens associated with developing, implementing, and maintaining these requirements for approval under this NPRM. Address written comments to the Dockets Unit as identified in the ADDRESSES section of this NPRM. We must receive comments regarding information collection burdens prior to the close of the comment period identified in the DATES section of this NPRM. G. Regulation Identifier Number (RIN) A regulation identifier number (RIN) is assigned to each regulatory action listed in the Unified Agenda of Federal Regulations. The Regulatory Information VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 Service Center publishes the Unified Agenda in April and October of each year. The RIN contained in the heading of this document may be used to crossreference this action with the Unified Agenda. H. Unfunded Mandates Reform Act of 1995 This NPRM does not impose unfunded mandates under the Unfunded Mandates Reform Act of 1995. It does not result in costs of $141.3 million or more to either State, local, or tribal governments, in the aggregate, or to the private sector and is the least burdensome alternative that achieves the objective of the rule. Further, in compliance with the Unfunded Mandates Reform Act of 1995, PHMSA will evaluate any regulatory action that might be proposed in subsequent stages of the proceeding to assess the effects on State, local, and tribal governments and the private sector. I. Environmental Assessment The National Environmental Policy Act of 1969 (NEPA), as amended (42 U.S.C. 4321–4347), and implementing regulations by the Council on Environmental Quality (CEQ) (40 CFR part 1500) require Federal agencies to consider the consequences of major Federal actions and prepare a detailed statement on actions that significantly affect the quality of the human environment. The CEQ regulations require Federal agencies to conduct an environmental review considering: (1) The need for the proposed action; (2) alternatives to the proposed action; (3) probable environmental impacts of the proposed action and alternatives; and (4) the agencies and persons consulted during the consideration process. 1. Need for the Action This NPRM responds to 20 petitions for rulemaking submitted by the regulated community and seeks comment on incorporating the provisions of one special permit. The issues discussed in this NPRM would, if eventually adopted, update and expand the use of currently authorized industry consensus standards; revise the construction, marking, and testing requirements of DOT 4-series cylinders; clarify the filling requirements for cylinders; discuss the handling of cylinders used in fire suppression systems; and revise the requalification and condemnation requirements for cylinders. This NPRM discusses the following amendments to the HMR: PO 00000 Frm 00022 Fmt 4701 Sfmt 4702 • Replace the currently incorporated Seventh Edition of the CGA’s publication C–6 Standards for Visual Inspection of Steel Compressed Gas Cylinders with the revised Tenth Edition and update the appropriate references throughout the HMR. • Revise the manufacturing requirements for certain DOT–4 series cylinders. • Revise the requirements for the requalification of DOT-specification cylinders by pressure testing found in 49 CFR part 180, subpart C. • Allow the use of the labels described in the Eighth Edition of CGA’s publication C–7 Guide to the Preparation of Precautionary Labeling and Marking of Compressed Gas Containers (currently IBR in the HMR) appendix A on cylinders contained in overpacks. • Require manufacturers to mark newly manufactured cylinders suitable for the transport of liquefied compressed gas with the mass weight or tare weight, and water capacity. • Allow non-specification cylinders used in a fixed fire suppression system to be transported under the same exceptions as those provided for fire extinguishers. • Permit use of the OVERPACK marking for cylinders packed in conformance with § 173.301(a)(9). • Clarify filling limits for a liquefied compressed gas in a manifold or a multiple element gas container (MEGC). • Clarify the requirements for filling non-specification cylinders for export or use on board a vessel. • Add requirements for DOTspecification cylinders used to transport adsorbed gases. 2. Alternatives Considered Alternative (1): Do nothing. Our goal is to update, clarify, and provide relief from certain existing regulatory requirements to promote safer transportation practices, eliminate unnecessary regulatory requirements, and facilitate international commerce. We rejected the do-nothing alternative. Alternative (2): Preferred choice. With this alternative, PHMSA will publish an NPRM seeking public comment on the issues raised in 20 petitions for rulemaking and the incorporation of one special permit; review the comments received on the amendments described in the ANPRM and their potential economic and safety implications; and use these comments to craft more specific proposals that are published in this NPRM. This is the selected alternative. E:\FR\FM\26JYP2.SGM 26JYP2 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules asabaliauskas on DSK3SPTVN1PROD with PROPOSALS 3. Environmental Impacts Hazardous materials are substances that may pose a threat to public safety or the environment during transportation because of their physical, chemical, or nuclear properties. The hazardous materials regulatory system is a risk management system that is prevention-oriented and focused on identifying a safety hazard and reducing the probability and quantity of a hazardous material release. Hazardous materials are categorized by hazard analysis and experience into hazard classes and packing groups. The regulations require each shipper to classify a material in accordance with these hazard classes and packing groups. The process of classifying a hazardous material is itself a form of hazard analysis. Further, the regulations require the shipper to communicate a material’s hazards through the use of hazard class, packing group, and proper shipping name on the shipping paper and the use of labels on packages and placards on transport vehicles. Thus, the shipping paper, labels, and placards communicate the most significant findings of the shipper’s hazard analysis. A hazardous material is assigned to one of three packing groups based upon its degree of hazard, from a high hazard material (Packing Group I) to a low hazard material (Packing Group III). The quality, damage resistance, and performance standards of the packaging in each packing group are appropriate for the hazards of the material transported. Under the HMR, hazardous materials are transported by aircraft, vessel, rail, and highway. The potential for environmental damage or contamination exists when packages of hazardous materials are involved in accidents or en route incidents resulting from cargo shifts, valve failures, package failures, loading, unloading, collisions, handling problems, or deliberate sabotage. The release of hazardous materials can cause the loss of ecological resources (e.g., wildlife habitats) and the contamination of air, aquatic environments, and soil. Contamination of soil can lead to the contamination of ground water. Compliance with the HMR substantially reduces the possibility of accidental release of hazardous materials. It is anticipated that the petitions and special permits discussed in this NPRM if adopted in a future rulemaking, would have minimal, if any, environmental consequences. 4. Agencies Consulted Occupational Safety and Health Administration VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 National Institute of Standards and Technology U.S. Environmental Protection Agency 5. Conclusion PHMSA has conducted a technical review of the amendments discussed in this NPRM and determined that the amendments considered would provide protection against the release of hazardous materials based on sound scientific methods and would not result in unusual stresses on the cylinder or adversely impact human health or the environment. PHMSA welcomes any data or information related to environmental impacts, both positive and negative, that may result from a future rulemaking addressing the issues discussed in this NPRM. J. Privacy Act In accordance with 5 U.S.C. 553(c), DOT solicits comments from the public to better inform its rulemaking process. DOT posts these comments, without edit, including any personal information the commenter provides, to www.regulations.gov, as described in the system of records notice (DOT/ALL– 14 FDMS), which can be reviewed at www.dot.gov/privacy. K. International Trade Analysis The Trade Agreements Act of 1979 (Pub. L. 96–39), as amended by the Uruguay Round Agreements Act (Pub. L. 103–465), prohibits Federal agencies from establishing any standards or engaging in related activities that create unnecessary obstacles to the foreign commerce of the United States. Pursuant to these Acts, the establishment of standards is not considered an unnecessary obstacle to the foreign commerce of the United States, so long as the standards have a legitimate domestic objective, such as the protection of safety, and do not operate in a manner that excludes imports that meet this objective. The statute also requires consideration of international standards and, where appropriate, that they be the basis for U.S. standards. PHMSA notes the purpose is to ensure the safety of the American public and has assessed the effects of this NPRM to ensure that it does not exclude imports that meet this objective. As a result, this NPRM is not considered as creating an unnecessary obstacle to foreign commerce. List of Subjects 49 CFR Part 107 Administrative practice and procedure, Hazardous materials transportation, Penalties, Reporting and recordkeeping requirements. PO 00000 Frm 00023 Fmt 4701 Sfmt 4702 48999 49 CFR Part 171 Exports, Hazardous materials transportation, Hazardous waste, Imports, Incorporation by reference, Reporting and recordkeeping requirements. 49 CFR Part 172 Education, Hazardous materials transportation, Hazardous waste, Incorporation by reference, Labeling, Markings, Packaging and containers, Reporting and recordkeeping requirements. 49 CFR Part 173 Hazardous materials transportation, Incorporation by reference, Packaging and containers, Radioactive materials, Reporting and recordkeeping requirements, Uranium. 49 CFR Part 178 Hazardous materials transportation, Incorporation by reference, Motor vehicle safety, Packaging and containers, Reporting and recordkeeping requirements. 49 CFR Part 180 Hazardous materials transportation, Motor carriers, Motor vehicle safety, Packaging and containers, Railroad safety, Reporting and recordkeeping requirements. In consideration of the foregoing, PHMSA is proposing to amend 49 CFR Chapter I as follows: PART 107—HAZARDOUS MATERIALS PROGRAM PROCEDURES 1. The authority citation for part 107 continues to read as follows: ■ Authority: 49 U.S.C. 5101–5128, 44701; Pub. L. 101–410 section 4 (28 U.S.C. 2461 note); Pub. L. 104–121, sections 212–213; Pub. L. 104–134, section 31001; Pub. L. 112– 141 section 33006; 49 CFR 1.81 and 1.97. 2. In § 107.803, revise paragraph (c)(3) to read as follows: ■ § 107.803 Approval of an independent inspection agency (IIA). * * * * * (c) * * * (3) Detailed description of the applicant’s qualifications and ability to perform the inspections and to verify the inspections required by part 178 and part 180 of this chapter; or those required under the terms of a special permit issued under this part. * * * * * ■ 3. In § 107.805, revise paragraphs (c)(3) and (c)(4), and add paragraph (c)(5) to read as follows: E:\FR\FM\26JYP2.SGM 26JYP2 49000 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules § 107.805 Approval of cylinder and pressure receptacle requalifiers. * * * * * (c) * * * (3) A certification that the facility will operate in compliance with the applicable requirements of subchapter C of this chapter; (4) The signature of the person making the certification and the date on which it was signed; and (5) For a mobile unit operation (as defined in § 180.203 of subchapter C of this chapter), the type of equipment to be used, the specific vehicles to be used, the geographic area the applicant is requesting to operate within, and any differences between the mobile operation and the facility operation as described under paragraph (c)(2) of this section. * * * * * PART 171—GENERAL INFORMATION, REGULATIONS, AND DEFINITIONS 4. The authority citation for part 171 continues to read as follows: ■ Authority: 49 U.S.C. 5101–5128, 44701; Pub. L. 101–410 section 4 (28 U.S.C. 2461 note); Pub. L. 104–121, sections 212–213; Pub. L. 104–134, section 31001; 49 CFR 1.81 and 1.97. 5. In § 171.7, revise paragraphs (g)(1) and (n) to read as follows: ■ § 171.7 Reference material. asabaliauskas on DSK3SPTVN1PROD with PROPOSALS * * * * * (g) * * * (1) 2015 ASME Boiler and Pressure Vessel Code (ASME Code), 2015 Edition, July 1, 2015 (as follows), into §§ 172.102; 173.3; 173.5b; 173.24b; 173.302d; 173.306; 173.315; 173.318; 173.420; 178.255–1; 178.255–2; 178.255–14; 178.255–15; 178.273; 178.274; 178.276; 178.277; 178.320; 178.337–1; 178.337–2; 178.337–3; 178.337–4; 178.337–6; 178.337–16; 178.337–18; 178.338–1; 178.338–2; 178.338–3; 178.338–4; 178.338–5; 178.338–6; 178.338–13; 178.338–16; 178.338–18; 178.338–19; 178.345–1; 178.345–2; 178.345–3; 178.345–4; 178.345–7; 178.345–14; 178.345–15; 178.346–1; 178.347–1; 178.348–1; 179.400–3; 180.407. * * * * * (n) Compressed Gas Association (CGA), 1235 Jefferson Davis Highway, Arlington, VA 22202. (1) CGA C–1, Methods for Pressure Testing Compressed Gas Cylinders, 2016, into §§ 178.36, 178.37, 178.38, 178.39, 178.42, 178.44, 178.45, 178.46, 178.47; 178.50; 178.51; 178.53; 178.55; 178.56; 178.57; 178.58; 178.59; 178.60; 178.61; 178.65; 178.68; 180.205, 180.209. VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 (2) CGA C–3, Standards for Welding on Thin-Walled Steel Cylinders, 2005 (Reaffirmed 2011), into §§ 178.47; 178.50; 178.51; 178.53; 178.55; 178.56; 178.57; 178.58; 178.59; 178.60; 178.61; 178.65; 178.68; 180.211. (3) CGA C–5, Cylinder Service Life— Seamless Steel High Pressure Cylinders, 1991 (Reaffirmed 1995), into § 173.302a and 180.209. (4) CGA C–6, Standards for Visual Inspection of Steel Compressed Gas Cylinders, 2013, into §§ 172.102, 173.3, 173.198, 173.302d, 180.205, 180.209, 180.211, 180.411, 180.519. (5) CGA C–6.1, Standards for Visual Inspection of High Pressure Aluminum Compressed Gas Cylinders, 2002, into §§ 180.205; 180.209. (6) CGA C–6.2, Guidelines for Visual Inspection and Requalification of Fiber Reinforced High Pressure Cylinders, 1996, into § 180.205. (7) CGA C–6.3, Guidelines for Visual Inspection and Requalification of Low Pressure Aluminum Compressed Gas Cylinders, 1991, into §§ 180.205; 180.209. (8) CGA C–7, Guide to Preparation of Precautionary Labeling and Marking of Compressed Gas Containers, Appendix A, issued 2004, into § 172.400a. (9) CGA C–8, Standard for Requalification of DOT–3HT Cylinder Design, 1985, into §§ 180.205; 180.209. (10) CGA C–11, Recommended Practices for Inspection of Compressed Gas Cylinders at Time of Manufacture, 2001, into § 178.35. (11) CGA C–12, Qualification Procedure for Acetylene Cylinder Design, 1994, into §§ 173.301; 173.303; 178.59; 178.60. (12) CGA C–13, Guidelines for Periodic Visual Inspection and Requalification of Acetylene Cylinders, 2000, into §§ 173.303; 180.205; 180.209. (13) CGA C–14, Procedures for Fire Testing of DOT Cylinder Pressure Relief Device Systems, 2005 (Reaffirmed 2010), into §§ 173.301; 173.323. (14) CGA G–1.6, Standard for Mobile Acetylene Trailer Systems, 2011, in § 173.301(g). (15) CGA G–2.2, Guideline Method for Determining Minimum of 0.2% Water in Anhydrous Ammonia, 1985, Reaffirmed 1997, into § 173.315. (16) CGA G–4.1, Cleaning Equipment for Oxygen Service, 1985, into § 178.338–15. (17) CGA P–20, Standard for the Classification of Toxic Gas Mixtures, 2003, Third Edition, into § 173.115. (18) CGA S–1.1, Pressure Relief Device Standards—Part 1—Cylinders for Compressed Gases, (except paragraph 9.1.1), 2011, into §§ 173.301; 173.304a; 178.75. PO 00000 Frm 00024 Fmt 4701 Sfmt 4702 (19) CGA S–1.2, Safety Relief Device Standards Part 2—Cargo and Portable Tanks for Compressed Gases, 1980, into §§ 173.315; 173.318; 178.276; 178.277. (20) CGA S–7, Method for Selecting Pressure Relief Devices for Compressed Gas Mixtures in Cylinders, 2005, into § 173.301. (21) CGA TB–2, Guidelines for Inspection and Repair of MC–330 and MC–331 Cargo Tanks, 1980, into §§ 180.407; 180.413. (22) CGA TB–25, Design Considerations for Tube Trailers, 2008, into § 173.301. * * * * * ■ 6. In § 171.23, revise paragraph (a)(4)(i) to read as follows: § 171.23 Requirements for specific materials and packagings transported under the ICAO Technical Instructions, IMDG Code, Transport Canada TDG Regulations, or the IAEA Regulations. * * * * * (a) * * * (4) * * * (i) The cylinder has been requalified and marked in accordance with subpart C of part 180 of this subchapter, or has been requalified as authorized by the Associate Administrator; * * * * * PART 172—HAZARDOUS MATERIALS TABLE, SPECIAL PROVISIONS, HAZARDOUS MATERIALS COMMUNICATIONS, EMERGENCY RESPONSE INFORMATION, TRAINING REQUIREMENTS, AND SECURITY PLANS 7. The authority citation for part 172 continues to read as follows: ■ Authority: 49 U.S.C. 5101–5128, 44701; 49 CFR 1.81, 1.96 and 1.97. 8. In § 172.400a, revise paragraph (a)(1) to read as follows: ■ § 172.400a * Exceptions from labeling. * * * * (a) * * * (1) A Dewar flask meeting the requirements in § 173.320 of this subchapter, or a cylinder containing a Division 2.1, 2.2, or 2.3 material, that is durably and legibly marked in conformance with CGA C–7, appendix A (IBR; see § 171.7 of this subchapter). However, if overpacked, marking (or appropriate labels) must be communicated on the exterior of the overpack unless visible from the outside in accordance with § 173.25 of this subchapter. * * * * * E:\FR\FM\26JYP2.SGM 26JYP2 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules PART 173—SHIPPERS—GENERAL REQUIREMENTS FOR SHIPMENTS AND PACKAGINGS 9. The authority citation for part 173 continues to read as follows: ■ Authority: 49 U.S.C. 5101–5128, 44701; 49 CFR 1.81, 1.96 and 1.97. 10. In § 173.3, revise paragraph (d)(1) to read as follows: ■ § 173.3 Packaging and exceptions. * * * * * (d) * * * (1) Except for Class 1, Class 7, or acetylene material, a cylinder containing a hazardous material may be overpacked in a salvage cylinder. * * * * * ■ 11. In § 173.301: ■ a. Revise paragraphs (a)(9) and (f)(4); and ■ b. In paragraphs (c) and (f), replace ‘‘9.1.1.1’’ with ‘‘9.1.1’’ in each place it appears. The revision reads as follows: asabaliauskas on DSK3SPTVN1PROD with PROPOSALS § 173.301 General requirements for shipment of compressed gases and other hazardous materials in cylinders, UN pressure receptacles and spherical pressure vessels. (a) * * * (9) Specification 2P, 2Q, 3E, 3HT, spherical 4BA, 4D, 4DA, 4DS, and 39 cylinders must be packed in strong nonbulk outer packagings. The outside of the combination package must be marked with an indication that the inner packagings conform to the prescribed specifications. Except for Specification 2P and 2Q containers, the ‘‘OVERPACK’’ marking in accordance with § 173.25(a)(3) of this part may be used to satisfy the marking requirement of this paragraph. Display of the ‘‘OVERPACK’’ marking is not an indication that this combination package is an overpack. * * * * * (f) * * * (4) DOT 39 cylinders. (i) A pressure relief device is required on a DOT 39 cylinder regardless of cylinder size or filled pressure. (ii) A DOT 39 cylinder used for liquefied Division 2.1 materials must be equipped with a metal pressure relief device. (iii) Fusible pressure relief devices are not authorized on a DOT 39 cylinder containing a liquefied gas. (iv) Notwithstanding the requirements of paragraph (f)(1) of this section with respect to the minimum burst pressure of pressure relief devices, a pressure relief device on a DOT 39 cylinder used to transport compressed or liquefied oxidizing gases may have a minimum VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 burst pressure within the range prescribed in §§ 173.302(f)(2) or 173.304(f)(2), as appropriate.’’ * * * * * ■ 12. In § 173.302, revise paragraph (a)(2) to read as follows: § 173.302 Filling of cylinders with nonliquefied (permanent) compressed gases or adsorbed gases. (a) * * * (2) Adsorbed gas. A cylinder filled with an adsorbed gas must be offered for transportation in conformance with the requirements of paragraph (d) of this section and § 173.301 of this subpart. In addition, UN pressure receptacles must meet the requirements in §§ 173.301b, 173.302b, and 173.302c of this subpart, as applicable, and DOT-specification cylinders must meet the requirements of §§ 173.301a, 173.302a and 173.302d, as applicable, of this subpart. Where more than one section applies to a cylinder, the most restrictive requirements must be followed. * * * * * ■ 13. In § 173.302a, revise paragraph (a)(3) to read as follows: § 173.302a Additional requirements for shipment of nonliquefied (permanent) compressed gases in specification cylinders. (a) * * * (3) DOT 39 cylinders. When the cylinder is filled with a Division 2.1 flammable gas, the internal volume of the cylinder may not exceed 1.25 L (75 in3). For chemical under pressure (see § 172.102, special provision 362 of this subchapter), the internal volume may not exceed 50 L (3050 in3). * * * * * ■ 14. Add § 173.302d to read as follows: § 173.302d Additional requirements for the shipment of adsorbed gases in DOTspecification cylinders. (a) General. A cylinder filled with an adsorbed gas must be offered for transportation in DOT-specification cylinders subject to the requirements in this section, and §§ 173.301 and 173.302 of this subpart. (b) Packaging. (1) DOT–3E1800, DOT– 3AA2015, and DOT–3AA2265 cylinders must be used with a capacity between 0.4 and 7.3 liters. (2) Each cylinder authorized by this section must remain in dedicated product service for its entire life. (3) The maximum pressure inside each cylinder must be 0 psig at 70 °F and 30 psig at 140 °F. (4) The contents of the cylinders must be limited in pressure and volume so that if totally discharged into the overpack cylinder, the pressure in the PO 00000 Frm 00025 Fmt 4701 Sfmt 4702 49001 overpack cylinder will not exceed 5⁄4 of the MAWP at 55 °C (131 °F). (5) The valve wheel of each cylinder must be secured by a strap that provides tension in the tightening direction. A plug must be placed in each valve and the cylinder and valve area must be shrink-wrapped before being placed in the overpack cylinder. A protective valve cap must be used on all pressure vessels except the DOT–3E1800 cylinder. Valves on the DOT–3E1800 cylinders must be protected in conformance with § 173.40(d) of this part. (6) Prior to each shipment, the leak integrity of the overpack cylinder must be verified and have a leak rate no greater than 1 × 10¥4 standard atmospheric cubic centimeters per second. (7) All closures of the overpack cylinder shall have a method to determine if they have been tampered with during transportation. The pressure indicating device on the overpack cylinder may be used to indicate tampering. (8) The shipper must instruct the carriers to reject or remove the overpack cylinder from transportation in the event that the pressure gauge drops below a pressure designated by the shipper. (9) Each overpack cylinder must be labeled for the hazardous material it contains. (10) Adsorbent material. Each cylinder is filled with a monolith solid microporous sorbent and/or bead-type sorbent onto which the gas is adsorbed. The gas remains adsorbed during transportation in essentially a solid state. The system is filled, operated, and transported at sub-atmospheric pressures and is described as a subatmospheric gas delivery system (SDS). The gas must be removed from the SDS using the input of external energy, such as a steady vacuum. (11) Overpack. (i) Cylinders authorized under this section must be transported in a non-DOT-specification full-opening, hinged-head or fully removable head, steel overpack cylinder. The overpack cylinder must be constructed to Section VIII, Division 1 of the ASME Code (IBR; see § 171.7 of this subchapter) with a minimum design margin of 4 to 1. The minimum MAWP must be 75 psig. The maximum water capacity must be 450 L (119 gallons). The overpack cylinder must not be equipped with a pressure relief device. The cylinders must be securely positioned within the overpack to prevent excessive movement. The overpack cylinder must have gaskets, valves and fittings that are compatible E:\FR\FM\26JYP2.SGM 26JYP2 49002 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules with the hazardous materials they contain. The overpack cylinder must have a pressure gauge clearly visible from the outside. The pressure gauge must be recessed into the overpack cylinder or otherwise protected from damage during transportation. The overpack cylinder must be pressurized to 3–5 psig with inert gas. (ii) Overpack testing. Each overpack cylinder must be visually inspected in conformance with CGA C–6 (IBR; see § 171.7 of this subchapter) at least once every five years. In addition, each overpack must be pressure tested to a minimum test pressure of at least 1.5 times MAWP. The pressure must be maintained for at least 30 seconds. The cylinder must be examined under test pressure and removed from service if a leak or defect is found. The retest and inspection must be performed by a person trained and experienced in the use of the inspection and testing equipment. (iii) Overpack marking. Each overpack cylinder that is successfully requalified must be durably and legibly marked with the word ‘‘Tested’’ followed by the requalification date (month/year). The marking must be in letters and numbers at least 12 mm (0.5 inches) high. Stamping on the overpack sidewall is not permitted. The requalification marking may be placed on any portion of the upper end of the cylinder near the marking required by the following method, or on a metal plate permanently secured to the cylinder. The outside of each overpack cylinder must be plainly and durably marked on any portion of the upper end with ‘‘OVERPACK CYLINDER’’ (in lieu of the ‘‘OVERPACK’’ marking requirement of § 173.25(a)(4) of this part), the proper shipping name of the hazardous material contained inside the overpack, the name and address of the consignee or consignor, and the name and address or registered symbol of the overpack manufacturer. (iv) Recordkeeping. The person who tested the overpack or that person’s agent must retain a record of the most recent visual inspection and pressure test of the overpack until the cylinder is requalified. The records must be made available to a DOT representative upon request. (12) Sub-atmospheric gas delivery system (SDS) testing. Each cylinder, except DOT–3E cylinders, must be retested by persons trained to perform this procedure. DOT–3AA cylinders must be retested and marked in conformance with the requirements for DOT–3AA cylinders in 49 CFR part 180 or the requirements of a current DOT special permit for ultrasonic examination. (c) Gases. The gases permitted to be transported as adsorbed in DOTspecification cylinders in conformance with this section are: Hazard class/division Proper shipping name/hazardous materials description Arsine ..................................................................................................................................... Boron Trifluoride .................................................................................................................... Hydrogen Selenide, Anhydrous ............................................................................................. Liquefied Gas, Toxic, Corrosive, n.o.s. (Arsenic Pentafluoride) ........................................... Liquefied Gas, Toxic, Corrosive, n.o.s. (Germanium Tetrafluoride) ...................................... Liquefied Gas, Toxic, Corrosive, n.o.s. (Phosphorus Trifluoride) ......................................... Phosphine .............................................................................................................................. Silicon Tetrafluoride ............................................................................................................... 15. In § 173.304a, add paragraph (a)(3) to read as follows: ■ § 173.304a Additional requirements for shipment of liquefied compressed gases in specification cylinders. asabaliauskas on DSK3SPTVN1PROD with PROPOSALS (a) * * * (3) The internal volume of a DOT 39 cylinder may not exceed 1.23 liters (nominal 75 in3) for a liquefied flammable gas. This cylinder shall be equipped with a pressure relief device as defined by the commodity in CGA S– 1.1 (IBR; see § 171.7 of this subchapter). If the commodity is not listed in CGA S–1.1, a CG–7 pressure relief valve must be used. * * * * * ■ 16. In § 173.306, revise paragraph (g) to read as follows: § 173.306 Limited quantities of compressed gases. * * * * * (g) Water pump system tank. A water pump system tank charged with compressed air or limited quantities of nitrogen or helium to not over 40 psig for single trip shipment to an installation site is excepted from labeling, and the specification VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 packaging requirements of this subchapter when shipped under the following conditions. In addition, shipments of these tanks are not subject to subpart F (placarding) requirements of part 172 of this subchapter, and not subject to parts 174 (except § 174.24) and 177 (except § 177.817) of this subchapter. (1) The tank must be of steel or composite, with heads concave to pressure, having a rated water capacity not exceeding 120 gallons and with an outside diameter not exceeding 24 inches. Safety relief devices are not required. (2) The tank must be pneumatically tested to the manufacturer’s specified maximum working pressure. The test pressure must be permanently marked on the tank. (3) The stress at prescribed pressure for steel tanks must not exceed 20,000 psi (or 25,000 psi for deep-draw steel), concave dome tanks using the formula: S = Pd/2t Where: S = wall stress in psi: PO 00000 Frm 00026 Fmt 4701 Sfmt 4702 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 Identification No. UN UN UN UN UN UN UN UN 2188 ........... 1008 ........... 2202 ........... 3308. 3308 ........... 3308. 2199 ........... 1859 ........... Hazard zone Zone A. Zone B. Zone A. Zone B. Zone A. Zone B. P = prescribed pressure for the tank of at least three (3) times charged pressure at 70 °F or 100 psig, whichever is greater; d = inside diameter in inches; t = minimum wall thickness, in inches. (4) For composite tanks, the minimum value of a hydrostatic leak test, per design, must be at least six (6) times the charge pressure at 70 °F or three (3) times the manufacturer’s specified maximum working pressure, whichever is greater. (5) For steel and composite tanks, the burst pressure must be at least six (6) times the charge pressure at 70 °F or three (3) times the manufacturer’s specified maximum working pressure, whichever is greater. (6) Each tank must be over-packed in a strong outer packaging in conformance with § 173.301(h) of this part. (7) Transportation is limited to motor vehicle, railcar, and vessel. Transportation by aircraft is not authorized. * * * * * ■ 17. In § 173.309, revise the introductory text to read as follows: E:\FR\FM\26JYP2.SGM 26JYP2 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules § 173.309 Fire extinguishers. This section applies to portable fire extinguishers for manual handling and operation, fire extinguishers for installation in aircraft, fire extinguishers for installation as part of a fire suppression system, and large fire extinguishers. Large fire extinguishers include fire extinguishers mounted on wheels for manual handling; fire extinguishing equipment or machinery mounted on wheels or wheeled platforms or units transported similar to (small) trailers; and fire extinguishers composed of a non-rollable pressure drum and equipment, and handled, for example, by forklift or crane when loaded or unloaded. * * * * * ■ 18. In § 173.312, revise paragraph (b)(1) to read as follows: § 173.312 MEGCs. Requirements for shipment of * * * * * (b) * * * (1) An MEGC being filled with a liquefied compressed gas must have each cylinder filled separately by weight. Manifolding during filling is not authorized. The filling density for DOTspecification cylinders may not exceed the values contained in § 173.304a(a)(2) of this subpart and for UN pressure receptacles may not exceed the values in accordance with § 173.304b(b) of this subpart. * * * * * PART 178—SPECIFICATIONS FOR PACKAGINGS § 178.36 Specification 3A and 3AX seamless steel cylinders. 19. The authority citation for part 178 continues to read as follows: ■ Authority: 49 U.S.C. 5101–5128; 49 CFR 1.81 and 1.97. 20. In § 178.35, add paragraph (f)(7) to read as follows: ■ § 178.35 General requirements for specification cylinders. asabaliauskas on DSK3SPTVN1PROD with PROPOSALS * * * * * (f) * * * (7) Tare weight or mass weight, and water capacity marking. DOTspecification 4B, 4BA, 4BW, and 4E cylinders manufactured after January 1, 2017, must be marked with the tare weight or mass weight. Additionally, the cylinder must be permanently marked with the water capacity. The owner of the cylinder at the time of manufacture must ensure it is marked with the following information, as applicable: (i) Tare weight. The tare weight for a cylinder 25 pounds (11.34 kg) or less at the time of manufacture, with a lower tolerance of 3 percent and an upper VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 tolerance of 1 percent; or for a cylinder exceeding 25 pounds (11.34 kg) at the time of manufacture, with a lower tolerance of 2 percent and an upper tolerance of 1 percent. The tare weight marking must be the actual weight of the fully assembled cylinder, including the valve(s) and other permanently affixed appurtenances. Removable protective cap(s) or cover(s) must not be included in the cylinder tare weight, or (ii) Mass weight. The mass weight for a cylinder 25 pounds (11.34 kg) or less at the time of manufacture, with a lower tolerance of 3 percent and an upper tolerance of 1 percent; or the mass weight marking for a cylinder exceeding 25 pounds (11.34 kg) at the time of manufacture, with a lower tolerance of 2 percent and an upper tolerance of 1 percent. The mass weight marking must be the actual weight of the fully assembled cylinder, excluding valve(s) and removable protective cap(s) or cover(s); and (iii) Water capacity. The water capacity for a cylinder 25 pounds (11.34 kg) water capacity or less, with a tolerance of minus 1 percent and no upper tolerance; or for a cylinder exceeding 25 pounds (11.34 kg) water capacity, with a tolerance of minus 0.5 percent and upper tolerance. The marked water capacity of the cylinder must be the capacity of the cylinder at the time of manufacture. * * * * * ■ 21. In § 178.36, revise paragraph (i) to read as follows: * * * * * (i) Pressure testing. Each cylinder must successfully withstand a pressure test as follows: (1) The test must be by water-jacket or direct expansion method as prescribed in CGA C–1 (IBR; see § 171.7 of this subchapter). The testing equipment must be calibrated as prescribed in CGA C–1. All testing equipment and pressure indicating devices must be accurate within the parameters defined in CGA C–1. (2) Each cylinder must be tested to a minimum of 5/3 times service pressure. (3) The minimum test pressure must be maintained for at least 30 seconds and sufficiently longer to ensure complete expansion. Any internal pressure applied after heat-treatment and previous to the official test may not exceed 90 percent of the test pressure. If, due to failure of the test apparatus or operator error the test pressure cannot be maintained the test may be repeated at a pressure increased by 10 percent or 100 psig, whichever is lower. PO 00000 Frm 00027 Fmt 4701 Sfmt 4702 49003 (4) Permanent, volumetric expansion may not exceed 10 percent of the total volumetric expansion at test pressure. * * * * * ■ 22. In § 178.37, revise paragraph (i) to read as follows: § 178.37 Specification 3AA and 3AAX seamless steel cylinders. * * * * * (i) Pressure testing. Each cylinder must successfully withstand a pressure test as follows: (1) The test must be by water-jacket or direct expansion method as prescribed in CGA C–1 (IBR; see § 171.7 of this subchapter). The testing equipment must be calibrated as prescribed in CGA C–1. All testing equipment and pressure indicating devices must be accurate within the parameters defined in CGA C–1. (2) Each cylinder must be tested to a minimum of 5/3 times service pressure. (3) The minimum test pressure must be maintained for at least 30 seconds and sufficiently longer to ensure complete expansion. Any internal pressure applied after heat-treatment and previous to the official test may not exceed 90 percent of the test pressure. If, due to failure of the test apparatus or operator error the test pressure cannot be maintained the test may be repeated at a pressure increased by 10 percent or 100 psig, whichever is lower. (4) Permanent, volumetric expansion may not exceed 10 percent of the total volumetric expansion at test pressure. * * * * * ■ 23. In § 178.38, revise paragraph (i) to read as follows: § 178.38 Specification 3B seamless steel cylinders. * * * * * (i) Pressure testing. Each cylinder must successfully withstand a pressure test as follows: (1) The test must be by water-jacket or direct expansion method as defined in CGA C–1 (IBR; see § 171.7 of this subchapter). The testing equipment must be calibrated as prescribed in CGA Pamphlet C–1. All testing equipment and pressure indicating devices must be accurate within the parameters defined in CGA Pamphlet C–1. (2) Cylinders must be tested as follows: (i) Each cylinder to at least two (2) times its service pressure; or (ii) One (1) cylinder out of each lot of 200 or fewer to at least three (3) times its service pressure. (3) When each cylinder is tested to the minimum test pressure, the minimum test pressure must be maintained at least 30 seconds and sufficiently longer to E:\FR\FM\26JYP2.SGM 26JYP2 49004 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules ensure complete expansion. Any internal pressure applied after heattreatment and prior to the official test may not exceed 90 percent of the test pressure. If, due to failure of the test apparatus or operator error, the test pressure cannot be maintained, the test may be repeated at a pressure increased by 10 percent or 100 psig, whichever is lower. (4) Permanent volumetric expansion may not exceed 10 percent of total volumetric expansion at test pressure. (5) When one (1) cylinder out of each lot of 200 or less is tested to at least 3 times service pressure, the balance of the lot must be pressure tested by the water-jacket, direct expansion or proof pressure test methods as defined in CGA C–1. The testing equipment must be calibrated as prescribed in CGA C–1. All testing equipment and pressure indicating devices must be accurate within the parameters defined in CGA C–1. The cylinders must be subjected to at least 2 times service pressure and show no defect. Determination of expansion properties is not required. * * * * * ■ 24. In § 178.39, revise paragraph (i) to read as follows: § 178.39 Specification 3BN seamless nickel cylinders. asabaliauskas on DSK3SPTVN1PROD with PROPOSALS * * * * * (i) Pressure testing. Each cylinder must successfully withstand a pressure test as follows: (1) The test must be by water-jacket or direct expansion method as prescribed in CGA C–1 (IBR; see § 171.7 of this subchapter). The testing equipment must be calibrated as prescribed in CGAC–1. All testing equipment and pressure indicating devices must be accurate within the parameters defined in CGA C–1. (2) Each cylinder must be tested to a minimum of at least two (2) times its service pressure. (3) The minimum test pressure must be maintained at least 30 seconds and sufficiently longer to ensure complete expansion. Any internal pressure applied after heat-treatment and prior to the official test may not exceed 90 percent of the test pressure. If, due to failure of the test apparatus or operator error, the test pressure cannot be maintained, the test may be repeated at a pressure increased by 10 percent or 100 psig, whichever is lower. (4) Permanent volumetric expansion may not exceed 10 percent of total volumetric expansion at test pressure. * * * * * ■ 25. In § 178.42, revise paragraph (f) to read as follows: VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 § 178.42 Specification 3E seamless steel cylinders. * * * * * (f) Pressure testing. Cylinders must withstand a pressure test as follows: (1) Lot Testing. One cylinder out of each lot of 500 or fewer must be subjected to a test pressure of 6,000 psig or higher. The testing equipment must be calibrated as prescribed in CGA Pamphlet C–1. All testing equipment and pressure indicating devices must be accurate within the parameters defined in CGA Pamphlet C–1 (2) Pressure Testing. The remaining cylinders of the lot must be pressure tested by water jacket, direct expansion or proof pressure method as prescribed in CGA C–1 (IBR; see § 171.7 of this subchapter). The cylinders must be examined under pressure of at least 3,000 psig and not to exceed 4,500 psig and show no defect. The test pressure must be maintained for at least 30 seconds and sufficiently longer to ensure complete examination. (3) Burst Testing. (i) The cylinder in paragraph (f)(1) of this section must burst at a pressure higher than 6,000 psig without fragmenting or otherwise showing lack of ductility, or must hold a pressure of 12,000 psig for 30 seconds without bursting. In which case, it must be subjected to a flattening test without cracking to six (6) times wall thickness between knife edges, wedge shaped 60degree angle, rounded out to a half-inch radius. The inspector’s report must be suitably changed to show results of latter alternate and flattening test. (ii) The cylinders in paragraph (f)(2) tested at a pressure in excess of 3,600 psig must burst at a pressure higher than 7,500 psig. * * * * * ■ 26. In § 178.44, revise paragraph (i) to read as follows: § 178.44 Specification 3HT seamless steel cylinders for aircraft use. * * * * * (i) Pressure testing. Each cylinder must successfully withstand a pressure test as follows: (1) The test must be by water-jacket or direct expansion method as prescribed in CGA C–1 (IBR; see § 171.7 of this subchapter). The testing equipment must be calibrated as prescribed in CGA C–1. All testing equipment and pressure indicating devices must be accurate within the parameters defined in CGA C–1. (2) Each cylinder must be tested to minimum of 5/3 times service pressure. (3) The minimum test pressure must be maintained at least 30 seconds and sufficiently longer to ensure complete expansion. Any internal pressure PO 00000 Frm 00028 Fmt 4701 Sfmt 4702 applied after heat-treatment and prior to the official test may not exceed 90 percent of the test pressure. If, due to failure of the test apparatus or operator error, the test pressure cannot be maintained, the test may be repeated at a pressure increased by 10 percent or 100 psig, whichever is lower. (4) Permanent volumetric expansion may not exceed 10 percent of total volumetric expansion at test pressure. * * * * * ■ 27. In § 178.45, revise paragraph (g) to read as follows: § 178.45 Specification 3T seamless steel cylinder. * * * * * (g) Pressure testing. Each cylinder must successfully withstand a pressure test as follows: (1) The test must be by water-jacket or direct expansion method as prescribed in CGA C–1 (IBR; see § 171.7 of this subchapter). The testing equipment must be calibrated as prescribed in CGA C–1. All testing equipment and pressure indicating devices must be accurate within the parameters defined in CGA C–1. (2) Each cylinder must be tested to minimum of 5/3 times service pressure. (3) The minimum test pressure must be maintained at least 30 seconds and sufficiently longer to ensure complete expansion. Any internal pressure applied after heat-treatment and prior to the official test may not exceed 90 percent of the test pressure. If, due to failure of the test apparatus or operator error, the test pressure cannot be maintained, the test may be repeated at a pressure increased by 10 percent or 100 psig, whichever is lower. (4) Permanent volumetric expansion may not exceed 10 percent of total volumetric expansion at test pressure. * * * * * ■ 28. In § 178.46, revise paragraph (g) to read as follows: § 178.46 Specification 3AL seamless aluminum cylinders. * * * * * (g) Pressure testing. Each cylinder must successfully withstand a pressure test as follows: (1) The test must be by water-jacket or direct expansion method as prescribed in CGA C–1 (IBR; see § 171.7 of this subchapter). The testing equipment must be calibrated as prescribed in CGA C–1. All testing equipment and pressure indicating devices must be accurate within the parameters defined in CGA C–1. (2) The minimum test pressure must be the greater of the following: E:\FR\FM\26JYP2.SGM 26JYP2 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules (i) 450 psig regardless of service pressure; (ii) Two (2) times the service pressure for cylinders having service pressure less than 500 psig; or (iii) 5/3 times the service pressure for cylinders having a service pressure of 500 psig or greater. (3) The minimum test pressure must be maintained at least 30 seconds and sufficiently longer to ensure complete expansion. Any internal pressure applied after heat treatment and prior to the official test may not exceed 90 percent of the test pressure. If, due to failure of the test apparatus or operator error, the test pressure cannot be maintained, the test may be repeated at a pressure increased by 10 percent or 100 psig, whichever is lower. If the test apparatus again fails to maintain the test pressure, the cylinder being tested must be condemned. Any internal pressure applied to the cylinder before any official test may not exceed 90 percent of the test pressure. (4) Permanent volumetric expansion may not exceed 10 percent of total volumetric expansion at test pressure. * * * * * ■ 29. In § 178.47, revise paragraph (j) to read as follows: § 178.47 Specification 4DS welded stainless steel cylinders for aircraft use. asabaliauskas on DSK3SPTVN1PROD with PROPOSALS * * * * * (j) Pressure testing. Each cylinder must successfully withstand a pressure test as follows: (1) The test must be by water-jacket or direct expansion method as prescribed in CGA C–1 (IBR; see § 171.7 of this subchapter). The testing equipment must be calibrated as prescribed in CGA C–1. All testing equipment and pressure indicating devices must be accurate within the parameters defined in CGA C–1. (2) Each cylinder must be tested to a minimum of at least two (2) times its service pressure. (3) The minimum test pressure must be maintained at least 30 seconds and sufficiently longer to ensure complete expansion. Any internal pressure applied after heat-treatment and prior to the official test may not exceed 90 percent of the test pressure. If, due to failure of the test apparatus or operator error, the test pressure cannot be maintained, the test may be repeated at a pressure increased by 10 percent or 100 psig, whichever is lower. (4) Permanent volumetric expansion may not exceed 10 percent of the total volumetric expansion at test pressure. (5) Cause for condemnation. Following the pressure test, the cylinder must be inspected. A cylinder with wall VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 thickness less than that required by paragraph (f) of this section must be condemned. Bulges and cracks are cause for condemnation. Welded joint defects exceeding requirements of paragraph (k) of this section are cause for condemnation. * * * * * ■ 30. Revise § 178.50 to read as follows: § 178.50 Specification 4B welded or brazed steel cylinders. (a) Type, size, pressure, and application. A DOT 4B is a welded or brazed steel cylinder with longitudinal seams that are forged lap-welded or brazed and with water capacity (nominal) not over 1,000 pounds and a service pressure of at least 150 but not over 500 psig. Cylinders closed in by spinning process are not authorized. (b) Steel. Open-hearth, electric or basic oxygen process steel of uniform quality must be used. Content percent may not exceed the following: carbon, 0.25; phosphorus, 0.045; sulphur, 0.050. The cylinder manufacturer must maintain a record of intentionally added alloying elements. (c) Identification of material. Pressure-retaining materials must be identified by any suitable method that does not compromise the integrity of the cylinder. Plates and billets for hotdrawn cylinders must be marked with the heat number. (d) Manufacture. Cylinders must be manufactured using equipment and processes adequate to ensure that each cylinder produced conforms to the requirements of this subpart. No defect is permitted that is likely to weaken the finished cylinder appreciably. A reasonably smooth and uniform surface finish is required. Exposed bottom welds on cylinders over 18 inches long must be protected by footrings. Welding procedures and operators must be qualified in conformance with CGA C– 3 (IBR, see § 171.7 of this subchapter). Seams must be made as follows: (1) Brazing materials. Brazing materials must be by copper brazing, by copper alloy brazing, or by silver alloy brazing. Copper alloy composition must be: Copper, 95 percent minimum; Silicon, 1.5 percent to 3.85 percent; Manganese, 0.25 percent to 1.10 percent. (2) Brazed circumferential seams. Heads attached by brazing must have a driving fit with the shell, unless the shell is crimped, swedged, or curled over the skirt or flange of the head, and be thoroughly brazed until complete penetration by the brazing material of the brazed joint is secured. Depth of brazing of the joint must be at least four PO 00000 Frm 00029 Fmt 4701 Sfmt 4702 49005 (4) times the minimum thickness of shell metal. (3) Welded circumferential seams. Circumferential seams are permitted by the welding process. (4) Longitudinal seams in shells. Longitudinal seams must be a forged lap joint design. When brazed, the plate edge must be lapped at least eight (8) times the thickness of the plate, laps being held in position, substantially metal to metal, by riveting or electric spot-welding; brazing must be done by using a suitable flux and by placing brazing material on one side of seam and applying heat until this material shows uniformly along the seam of the other side. (e) Welding or brazing. Only the attachment of neckrings, footrings, handles, bosses, pads, and valve protection rings to the tops and bottoms of cylinders by welding or brazing is authorized. Attachments and the portion of the cylinder to which they are attached must be made of weldable steel, the carbon content of which may not exceed 0.25 percent except in the case of 4130X steel, which may be used with proper welding procedure. (f) Wall thickness. The wall thickness of the cylinder must comply with the following requirements: (1) For cylinders with outside diameters over 6 inches, the minimum wall thickness must be 0.090 inch. In any case, the minimum wall thickness must be such that calculated wall stress at minimum test pressure (paragraph (i)(4) of this section) may not exceed the following values: (i) 24,000 psi for cylinders without longitudinal seam. (ii) 22,800 psig for cylinders having copper brazed or silver alloy brazed longitudinal seam. (iii) 18,000 psi for cylinders having forged lapped welded longitudinal seam. (2) Calculation must be made by the formula: S = [P(1.3D2 + 0.4d2)]/(D2 ¥ d2) Where: S = wall stress in psi; P = minimum test pressure prescribed for water jacket test or 450 psig whichever is the greater; D = outside diameter in inches; d = inside diameter in inches. (g) Heat treatment. Cylinder heads, bodies or the completed cylinder, formed by drawing or pressing, must be uniformly and properly heat treated by an applicable method shown in table 1 of appendix A of this part before tests. (h) Opening in cylinders. Openings in cylinders must comply with the following: E:\FR\FM\26JYP2.SGM 26JYP2 asabaliauskas on DSK3SPTVN1PROD with PROPOSALS 49006 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules (1) Any opening must be placed on other than a cylindrical surface. (2) Each opening in a spherical type of cylinder must be provided with a fitting, boss, or pad of weldable steel securely attached to the cylinder by fusion welding. (3) Each opening in a cylindrical type cylinder, except those for pressure relief devices, must be provided with a fitting, boss, or pad, securely attached to container by brazing or by welding. (4) If threads are used, they must comply with the following: (i) Threads must be clean cut, even without checks, and tapped to gauge. (ii) Taper threads must be of a length not less than as specified for American Standard taper pipe threads. (iii) Straight threads, must have at least four (4) engaged threads, must have tight fit and a calculated shear strength at least ten (10) times the test pressure of the cylinder; gaskets are required for straight threads and must be of sufficient quality to prevent leakage. (iv) A brass fitting may be brazed to the steel boss or flange on cylinders used as component parts of handheld fire extinguishers. (5) The closure of a fitting, boss, or pad must be adequate to prevent leakage. (i) Pressure testing. Each cylinder must successfully withstand a pressure test as follows: (1) Lot testing. (i) At least one (1) cylinder randomly selected out of each lot of 200 or fewer must be tested by the water jacket or direct expansion method as prescribed in CGA C–1 (IBR; see § 171.7 of this subchapter). The testing equipment must be calibrated as prescribed in CGA C–1. All testing equipment and pressure indicating devices must be accurate within the parameters defined in CGA C–1. (ii) Each cylinder must be tested to a minimum of 2 times service pressure. (iii) The minimum test pressure must be maintained at least 30 seconds and sufficiently longer to ensure complete expansion. Any internal pressure applied after heat-treatment and prior to the official test may not exceed 90 percent of the test pressure. If, due to failure of the test apparatus or operator error, the test pressure cannot be maintained, the test may be repeated at a pressure increased by 10 percent or 100 psig, whichever is lower. (iv) Permanent volumetric expansion may not exceed 10 percent of the total volumetric expansion at test pressure. (2) Pressure testing. (i) The remaining cylinders in the lot must be tested by the water-jacket, direct expansion or proof pressure test methods as VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 prescribed in CGA C–1. The minimum test pressure must be maintained for a specific timeframe as prescribed and the testing equipment must be calibrated as prescribed in CGA C–1. Further, all testing equipment and pressure indicating devices must be accurate within the parameters defined in CGA C–1. Determination of expansion properties is not required. (ii) Each cylinder must be tested to a minimum of at least two (2) times service pressure and show no defect. (j) Mechanical test. A mechanical test must be conducted to determine yield strength, tensile strength, elongation as a percentage, and reduction of area of material as a percentage as follows: (1) Testing is required on two (2) specimens removed from one (1) cylinder, or part thereof, heat-treated as required, as illustrated in appendix A to subpart C of this part. For lots of 30 or fewer, mechanical tests are authorized to be made on a ring at least 8 inches long removed from each cylinder and subjected to the same heat of material taken as the finished cylinder. (2) Specimens must comply with the following: (i) When a cylinder wall is 3⁄16 inch thick or less, one the following gauge lengths is authorized: A gauge length of 8 inches with a width not over 11⁄2 inches, a gauge length of 2 inches with a width not over 11⁄2 inches, or a gauge length at least twenty-four (24) times the thickness with a width not over six (6) times the thickness. (ii) The specimen, exclusive of grip ends, may not be flattened. Grip ends may be flattened to within one inch of each end of the reduced section. (iii) When the size of a cylinder does not permit securing straight specimens, the specimens may be taken in any location or direction and may be straightened or flattened cold, by pressure only, not by blows. When specimens are taken and prepared using this method, the inspector’s report must show detailed information regarding such specimens in connection with the record of mechanical tests. (iv) Heating of a specimen for any purpose is not authorized. (3) The yield strength in tension must be the stress corresponding to a permanent strain of 0.2 percent of the gauge length. The following conditions apply: (i) The yield strength must be determined by either the ‘‘offset’’ method or the ‘‘extension under load’’ method as prescribed in ASTM E 8 (IBR, see § 171.7 of this subchapter). (ii) In using the ‘‘extension under load’’ method, the total strain (or ‘‘extension under load’’) corresponding PO 00000 Frm 00030 Fmt 4701 Sfmt 4702 to the stress at which the 0.2 percent permanent strain occurs may be determined with sufficient accuracy by calculating the elastic extension of the gauge length under appropriate load and adding thereto 0.2 percent of the gauge length. Elastic extension calculations must be based on an elastic modulus of 30,000,000. In the event of controversy, the entire stress-strain diagram must be plotted and the yield strength determined from the 0.2 percent offset. (iii) For the purpose of strain measurement, the initial strain reference must be set while the specimen is under a stress of 12,000 psi, and strain indicator reading must be set at the calculated corresponding strain. (iv) Cross-head speed of the testing machine may not exceed 18 inch per minute during yield strength determination. (v) The yield strength must not exceed 73 percent of the tensile strength. (k) Elongation. Mechanical test specimens must show at least a 20 percent elongation. However, elongation percentages may be reduced numerically by one (1) percentage for each 7,500 psi increase of tensile strength above 50,000 psi. The tensile strength may be incrementally increased by a maximum total of 30,000 psi. (l) Flattening test. (1) Cylinders. After pressure testing, a flattening test must be performed on one cylinder taken at random out of each lot of 200 or fewer by placing the cylinder between wedgeshaped knife edges having a 60 degree included angle, rounded to a half-inch radius. The longitudinal axis of the cylinder must be at a 90-deqree angle to knife edges during the test. For lots of 30 or fewer, flattening tests are authorized to be performed on a ring of at least 8 inches long removed from each cylinder and subjected to same heat of material taken as the finished cylinder. (2) Pipes. When cylinders are constructed of lap welded pipe, an additional flattening test is required, without evidence of cracking, up to six (6) times the wall thickness. In such case, the rings (crop ends) removed from each end of the pipe, must be tested with the weld 45 °F or less from the point of greatest stress. (m) Acceptable results for flattening tests. There must be no evidence of cracking of the sample when it is flattened between flat plates to no more than six (6) times the wall thickness. If this test fails, one additional sample from the same lot may be taken. If this second sample fails, the entire lot must be condemned. (n) Condemned cylinders. (1) Unless otherwise stated in this section, if a E:\FR\FM\26JYP2.SGM 26JYP2 asabaliauskas on DSK3SPTVN1PROD with PROPOSALS Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules sample cylinder or specimen taken from a lot of cylinders fails the prescribed test, then two additional specimens must be selected from the same lot and subjected to the prescribed test. If either of these fails the test, then the entire lot must be condemned. (2) Reheat treatment of a condemned cylinder. Reheat treatment is authorized for a condemned cylinder in accordance with this paragraph. After reheat treatment, a cylinder must pass all prescribed tests in this section to be considered acceptable. Repair of brazed seams by brazing and welded seams by welding is authorized. For cylinders with an outside diameter of less than or equal to six (6) inches, welded seam repairs greater than one (1) inch in length shall require reheat treatment of the cylinder. For cylinders greater than an outside diameter of 6 inches, welded seam repairs greater than three (3) inches in length shall require reheat treatment. (o) Markings. (1) Markings must be as required as in § 178.35 of this subpart and in addition must be stamped plainly and permanently in any of the following locations on the cylinder: (i) On shoulders and top heads whose wall thickness is not less than 0.087inch thick; (ii) On side wall adjacent to top head for side walls which are not less than 0.090 inch thick; (iii) On a cylindrical portion of the shell that extends beyond the recessed bottom of the cylinder, constituting an integral and non-pressure part of the cylinder; (iv) On a metal plate attached to the top of the cylinder or permanent part thereof; sufficient space must be left on the plate to provide for stamping at least six retest dates; the plate must be at least 1⁄16-inch thick and must be attached by welding, or by brazing. The brazing rod must melt at a temperature of 1100 °F. Welding or brazing must be along all the edges of the plate; (v) On the neck, neckring, valve boss, valve protection sleeve, or similar part permanently attached to the top of the cylinder; or (vi) On the footring permanently attached to the cylinder, provided the water capacity of the cylinder does not exceed 30 pounds. (2) Embossing the cylinder head or sidewall is not permitted. ■ 31. Revise § 178.51 to read as follows: § 178.51 Specification 4BA welded or brazed steel cylinders. (a) Type, size, pressure, and application. A DOT 4BA cylinder is a cylinder, either spherical or cylindrical design, with a water capacity of 1,000 VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 pounds or less and a service pressure range of 225 to 500 psig. Closures made by the spinning process are not authorized. (1) Spherical type cylinder designs are permitted to have only one circumferentially welded seam. (2) Cylindrical type cylinder designs must be of circumferentially welded or brazed construction; longitudinally brazed or silver-soldered seams are also permitted. (b) Steel. The steel used in the construction of the cylinder must be as specified in table 1 of appendix A to this part. The cylinder manufacturer must maintain a record of intentionally added alloying elements. (c) Identification of material. Pressure-retaining material must be identified by any suitable method that does not compromise the integrity of the cylinder. Plates and billets for hotdrawn cylinders must be marked with the heat number. (d) Manufacture. Cylinders must be manufactured using equipment and processes adequate to ensure that each cylinder produced conforms to the requirements of this subpart. No defect is permitted that is likely to appreciably weaken the finished cylinder. A reasonably smooth and uniform surface finish is required. Exposed bottom welds on cylinders over 18 inches long must be protected by footrings. (1) Seams must be made as follows: (i) Minimum thickness of heads and bottoms must be not less than 90 percent of the required thickness of the side wall. (ii) Circumferential seams must be made by welding or by brazing. Heads attached by brazing must have a driving fit with the shell unless the shell is crimped, swedged or curled over the skirt or flange of the head and must be thoroughly brazed until complete penetration by the brazing material of the brazed joint is secured. Depth of brazing from end of the shell must be at least four (4) times the thickness of shell metal. (iii) Longitudinal seams in shells must be made by copper brazing, copper alloy brazing, or by silver alloy brazing. Copper alloy composition must be: Copper 95 percent minimum, Silicon 1.5 percent to 3.85 percent, Manganese 0.25 percent to 1.10 percent. The melting point of the silver alloy brazing material must be in excess of 1,000 °F. The plate edge must be lapped at least eight times the thickness of plate, laps being held in position, substantially metal to metal, by riveting or by electric spot-welding. Brazing must be done by using a suitable flux and by placing brazing material on one side of seam PO 00000 Frm 00031 Fmt 4701 Sfmt 4702 49007 and applying heat until this material shows uniformly along the seam of the other side. Strength of longitudinal seam: Copper brazed longitudinal seam must have strength at least 3/2 times the strength of the steel wall. (2) Welding procedures and operators must be qualified in conformance with CGA C–3 (IBR, see § 171.7 of this subchapter). (e) Welding or brazing. Welding or brazing of any attachment or opening to the heads of cylinders is permitted provided the carbon content of the steel does not exceed 0.25 percent except in the case of 4130 × steel, which may be used with proper welding procedure. (f) Wall thickness. The minimum wall thickness of the cylinder must meet the following conditions: (1) For any cylinder with an outside diameter of greater than 6 inches, the minimum wall thickness is 0.078 inch. In any case, the minimum wall thickness must be such that the calculated wall stress at the minimum test pressure may not exceed the lesser value of any of the following: (i) The value shown in table 1 of appendix A to this part, for the particular material under consideration; (ii) One-half of the minimum tensile strength of the material determined as required in paragraph (j) of this section; (iii) 35,000 psi; or (iv) Further provided that wall stress for cylinders having copper brazed longitudinal seams may not exceed 95 percent of any of the above values. Measured wall thickness may not include galvanizing or other protective coating. (2) Cylinders that are cylindrical in shape must have the wall stress calculated by the formula: S = [P(1.3D2 + 0.4d2)]/(D2 ¥ d2) Where: S = wall stress in psi; P = minimum test pressure prescribed for water jacket test; D = outside diameter in inches; d = inside diameter in inches. (3) Cylinders that are spherical in shape must have the wall stress calculated by the formula: S = PD/4tE Where: S = wall stress in psi; P = minimum test pressure prescribed for water jacket test; D = outside diameter in inches; t = minimum wall thickness in inches; E = 0.85 (provides 85 percent weld efficiency factor which must be applied in the girth weld area and heat affected zones which zone must extend a distance of 6 times wall thickness from center line of weld); E = 1.0 (for all other areas). E:\FR\FM\26JYP2.SGM 26JYP2 asabaliauskas on DSK3SPTVN1PROD with PROPOSALS 49008 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules (4) For a cylinder with a wall thickness less than 0.100 inch, the ratio of tangential length to outside diameter may not exceed 4.1. (g) Heat treatment. Cylinders must be heat treated in accordance with the following requirements: (1) Each cylinder must be uniformly and properly heat treated prior to test by the applicable method shown in table 1 of appendix A to this part. Heat treatment must be accomplished after all forming and welding operations, except that when brazed joints are used, heat treatment must follow any forming and welding operations, but may be done before, during or after the brazing operations [see § 178.51(m) for weld repairs]. (2) Heat treatment is not required after the welding or brazing of weldable low carbon parts to attachments of similar material which have been previously welded or brazed to the top or bottom of cylinders and properly heat treated, provided such subsequent welding or brazing does not produce a temperature in excess of 400 °F in any part of the top or bottom material. (h) Openings in cylinders. Openings in cylinders must comply with the following requirements: (1) Any opening must be placed on other than a cylindrical surface. (2) Each opening in a spherical type cylinder must be provided with a fitting, boss, or pad of weldable steel securely attached to the container by fusion welding. (3) Each opening in a cylindrical type cylinder must be provided with a fitting, boss, or pad, securely attached to container by brazing or by welding. (4) If threads are used, they must comply with the following: (i) Threads must be clean-cut, even, without checks and tapped to gauge. (ii) Taper threads must be of a length not less than that specified for American Standard taper pipe threads. (iii) Straight threads, having at least 4 engaged threads, must have a tight fit and a calculated shear strength of at least 10 times the test pressure of the cylinder. Gaskets, adequate to prevent leakage, are required. (i) Pressure testing. Each cylinder must successfully withstand a pressure test as follows: (1) Lot testing. (i) At least one (1) cylinder randomly selected out of each lot of 200 or fewer must be tested by water jacket or direct expansion method as prescribed in CGA C–1 (IBR, see § 171.7 of this subchapter). The testing equipment must be calibrated as prescribed in CGA C–1. All testing equipment and pressure indicating VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 devices must be accurate within the parameters defined in CGA C–1. (ii) Each cylinder must be tested to a minimum of two (2) times service pressure. (iii) The minimum test pressure must be maintained at least 30 seconds and sufficiently longer to ensure complete expansion. Any internal pressure applied after heat-treatment and prior to the official test may not exceed 90 percent of the test pressure. If, due to failure of the test apparatus or operator error, the test pressure cannot be maintained, the test may be repeated at a pressure increased by 10 percent or 100 psig, whichever is lower. (iv) Permanent volumetric expansion may not exceed 10 percent of the total volumetric expansion at test pressure. (2) Pressure testing. (i) The remaining cylinders in the lot must be tested by the water-jacket, direct expansion or proof pressure test methods as prescribed in CGA C–1. The minimum test pressure must be maintained for a specific timeframe and the testing equipment must be calibrated as prescribed in CGA C–1. Further, all testing equipment and pressure indicating devices must be accurate within the parameters defined in CGA C–1. Determination of expansion properties is not required. (ii) Each cylinder must be tested to a minimum of two (2) times service pressure and show no defect. (j) Mechanical test. (1) A mechanical test must be conducted to determine yield strength, tensile strength, elongation as a percentage, and reduction of area of material as a percentage, as follows: (i) Cylinders. Testing is required on two (2) specimens removed from one cylinder or part thereof taken at random out of each lot of 200 or fewer. Samples must be removed as illustrated in appendix A to subpart C of this part. (ii) Spheres. Testing is required on two (2) specimens removed from the sphere or flat representative sample plates of the same heat of material taken at random from the steel used to produce the spheres. Samples (including plates) must be taken from each lot of 200 or fewer. The flat steel from which two specimens are to be removed must receive the same heat of material taken as the as the spheres themselves. Samples must be removed as illustrated in appendix A to subpart C of this part. (2) Specimens must comply with the following: (i) When a cylinder wall is 3⁄16 inch thick or less, one the following gauge lengths is authorized: A gauge length of 8 inches with a width not over 11⁄2 PO 00000 Frm 00032 Fmt 4701 Sfmt 4702 inches, a gauge length of 2 inches with a width not over 11⁄2 inches, or a gauge length at least twenty-four (24) times the thickness with a width not over six (6) times the thickness. (ii) The specimen, exclusive of grip ends, may not be flattened. Grip ends may be flattened to within one inch of each end of the reduced section. (iii) When size of the cylinder does not permit securing straight specimens, the specimens may be taken in any location or direction and may be straightened or flattened cold, by pressure only, not by blows. When specimens are so taken and prepared, the inspector’s report must show in connection with record of physical tests detailed information in regard to such specimens. (iv) Heating of a specimen for any purpose is not authorized. (3) The yield strength in tension must be the stress corresponding to a permanent strain of 0.2 percent of the gauge length. The following conditions apply: (i) The yield strength must be determined by either the ‘‘offset’’ method or the ‘‘extension under load’’ method as prescribed in ASTM E 8 (IBR, see § 171.7 of this subchapter). (ii) In using the ‘‘extension under load’’ method, the total strain (or ‘‘extension under load’’), corresponding to the stress at which the 0.2 percent permanent strain occurs may be determined with sufficient accuracy by calculating the elastic extension of the gauge length under appropriate load and adding thereto 0.2 percent of the gauge length. Elastic extension calculations must be based on an elastic modulus of 30,000,000. In the event of controversy, the entire stress-strain diagram must be plotted and the yield strength determined from the 0.2 percent offset. (iii) For the purpose of strain measurement, the initial strain reference must be set while the specimen is under a stress of 12,000 psi, and the strain indicator reading must be set at the calculated corresponding strain. (k) Elongation. Mechanical test specimens must show at least a 40 percent elongation for a 2-inch gauge length or at least 20 percent in other cases. However, elongation percentages may be reduced numerically by 2 percent for 2-inch specimens, and by 1 percent in other cases, for each 7,500 psi increase of tensile strength above 50,000 psi. The tensile strength may be incrementally increased by a maximum total of 30,000 psi. (l) Tests of welds. Except for brazed seams, welds must be tested as follows: (1) Tensile test. A specimen must be removed from one cylinder of each lot E:\FR\FM\26JYP2.SGM 26JYP2 asabaliauskas on DSK3SPTVN1PROD with PROPOSALS Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules of 200 or fewer, or welded test plate. The welded test plate must be of one of the heats in the lot of 200 or fewer which it represents, in the same condition and approximately the same thickness as the cylinder wall except that in no case must it be of a lesser thickness than that required for a quarter size Charpy impact specimen. The weld must be made by the same procedures and subjected to the same heat of material taken as the major weld on the cylinder. The specimen must be taken from across the major seam and must be prepared and tested in conformance with and must meet the requirements of CGA C–3 (IBR, see § 171.7 of this subchapter). Should this specimen fail to meet the requirements, one additional specimen must be taken from two additional cylinders or welded test plates from the same lot and tested. If any of these latter two specimens fail to meet the requirements, the entire lot represented must be condemned. (2) Guided bend test. A root bend test specimen must be removed from the cylinder or welded test plate, used for the tensile test specified in paragraph (l)(1) of this section. The specimen must be taken from across the circumferential seam and must be prepared and tested in conformance with and must meet the requirements of CGA C–3. Should this specimen fail to meet the requirements, one additional specimen must be taken from two additional cylinders or welded test plates from the same lot and tested. If any of these latter two specimens fail to meet the requirements, the entire lot represented must be condemned. (3) Alternate guided-bend test. This test may be used and must be as required by CGA C–3. The specimen must be bent until the elongation at the outer surface, adjacent to the root of the weld, between the lightly scribed gage lines a to b, must be at least 20 percent, except that this percentage may be reduced for steels having a tensile strength in excess of 50,000 psig, as provided in paragraph (k) of this section. Should the specimen fail to meet the requirements, one additional specimen must be taken from two additional cylinders or welded test plates from the same lot and tested. If any of these latter two specimens fail to meet the requirements, the entire lot represented must be condemned. (m) Condemned cylinders. (1) Unless otherwise stated in this section, if a sample cylinder or specimen taken from a lot of cylinders fails the prescribed test, then two additional specimens must be selected from the same lot and subjected to the prescribed test. If either of these VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 additional specimens fails the test, then the entire lot must be condemned. (2) Reheat treatment of a condemned cylinder. Reheat treatment is authorized for a condemned cylinder in accordance with this paragraph. After reheat, a cylinder must pass all prescribed tests in this section to be acceptable. Repair of brazed seams by brazing and welded seams by welding is considered authorized. For cylinders with an outside diameter of less than or equal to six (6) inches, welded seam repairs greater than one (1) inch in length shall require reheat treatment of the cylinder. For cylinders greater than an outside diameter of six (6) inches, welded seam repairs greater than three (3) inches in length shall require reheat treatment. (n) Markings. (1) Markings must be as required in § 178.35 of this subpart and in addition must be stamped plainly and permanently in one of the following locations on the cylinder: (i) On shoulders and top heads whose wall thickness is not less than 0.087 inch thick; (ii) On side wall adjacent to top head for side walls not less than 0.090 inch thick; (iii) On a cylindrical portion of the shell that extends beyond the recessed bottom of the cylinder constituting an integral and non-pressure part of the cylinder; (iv) On a plate attached to the top of the cylinder or permanent part thereof; sufficient space must be left on the plate to provide for stamping at least six retest dates; the plate must be at least 1⁄16-inch thick and must be attached by welding, or by brazing at a temperature of at least 1100 °F, throughout all edges of the plate; (v) On the neck, neckring, valve boss, valve protection sleeve, or similar part permanently attached to the top of the cylinder; or (vi) On the footring permanently attached to the cylinder, provided the water capacity of the cylinder does not exceed 30 pounds. (2) Embossing the cylinder head or side is not permitted. ■ 32. In § 178.53, revise paragraph (h) to read as follows: § 178.53 Specification 4D welded steel cylinders for aircraft use. * * * * * (h) Pressure testing. Each cylinder must successfully withstand a pressure test as follows: (1) Lot Testing. (i) At least one cylinder selected at random out of each lot of 200 or fewer must be tested by water-jacket or direct expansion as prescribed in CGA C–1 (IBR; see § 171.7 of this subchapter). The testing PO 00000 Frm 00033 Fmt 4701 Sfmt 4702 49009 equipment must be calibrated as prescribed in CGA C–1. All testing equipment and pressure indicating devices must be accurate within the parameters defined in CGA C–1. (ii) Each cylinder must be tested to a minimum of three (3) times service pressure. (iii) The minimum test pressure must be maintained be maintained at least 30 seconds and sufficiently longer to ensure complete expansion. Any internal pressure applied after heattreatment and prior to the official test may not exceed 90 percent of the test pressure. If, due to failure of the test apparatus or operator error, the test pressure cannot be maintained, the test may be repeated at a pressure increased by 10 percent or 100 psig, whichever is lower. (iv) Permanent volumetric expansion may not exceed 10 percent of the total volumetric expansion at test pressure. (2) Pressure testing. (i) The remaining cylinders in each lot must be tested by the water-jacket, direct expansion or proof pressure test methods as prescribed in CGA C–1. The minimum test pressure must be maintained for a specific timeframe, and the testing equipment must be calibrated as prescribed in CGA C–1. Further, all testing equipment and pressure indicating devices must be accurate within the parameters defined in CGA C–1. Determination of expansion properties is not required. (ii) Each cylinder must be tested to a minimum of two (2) times service pressure and show no defect. * * * * * ■ 33. In § 178.55, revise paragraph (i) to read as follows: § 178.55 Specification 4B240ET welded or brazed cylinders. * * * * * (i) Pressure testing. Each cylinder must successfully withstand a pressure test as follows: (1) Lot Testing. (i) At least one (1) cylinder selected at random out of each lot of 200 or fewer must be tested by water-jacket or direct expansion method as prescribed in CGA C–1 (IBR; see § 171.7 of this subchapter). The testing equipment must be calibrated as prescribed in CGA C–1. All testing equipment and pressure indicating devices must be accurate within the parameters defined in CGA C–1. (ii) Each cylinder must be tested to a minimum of two (2) times service pressure. (iii) The minimum test pressure must be maintained at least 30 seconds and sufficiently longer to ensure complete expansion. Any internal pressure E:\FR\FM\26JYP2.SGM 26JYP2 49010 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules (ii) Each cylinder must be tested to a minimum of two (2) times service pressure. (iii) The minimum test pressure must be maintained at least 30 seconds and sufficiently longer to ensure complete expansion. Any internal pressure applied after heat-treatment and prior to the official test may not exceed 90 percent of the test pressure. If, due to failure of the test apparatus or operator error, the test pressure cannot be maintained, the test may be repeated at a pressure increased by 10 percent or 100 psig, whichever is lower. (iv) Permanent volumetric expansion may not exceed 10 percent of the total volumetric expansion at test pressure. (v) If a selected cylinder fails, then two (2) additional specimens must be selected at random from the same lot and subjected to the prescribed testing. If either of these fails the test, then each cylinder in that lot must be tested as prescribed in paragraph (i)(l) of this section. (2) Pressure testing. (i) The remaining cylinders in each lot must be tested by the water-jacket, direct expansion or proof pressure test methods as prescribed in CGA C–1. The minimum test pressure must be maintained for a specific timeframe, and the testing equipment must be calibrated as prescribed in CGA C–1. Further, all testing equipment and pressure indicating devices must be accurate within the parameters defined in CGA C–1. Determination of expansion properties is not required. (ii) Each cylinder must be tested to a minimum of two (2) times service pressure and show no defect. A cylinder showing a defect must be condemned unless it may be requalified under paragraph (m) of this section. * * * * * ■ 35. In § 178.57, revise paragraph (i) to read as follows: § 178.56 Specification 4AA480 welded steel cylinders. § 178.57 Specification 4L welded insulated cylinders. * asabaliauskas on DSK3SPTVN1PROD with PROPOSALS applied after heat-treatment and prior to the official test may not exceed 90 percent of the test pressure. If, due to failure of the test apparatus or operator error, the test pressure cannot be maintained, the test may be repeated at a pressure increased by 10 percent or 100 psig, whichever is lower. (iv) Permanent volumetric expansion may not exceed 10 percent of the total volumetric expansion at test pressure. (2) Pressure testing. (i) The remaining cylinders in each lot must be tested by the water-jacket, direct expansion or proof pressure test methods as prescribed in CGA C–1. The minimum test pressure must be maintained for a specific timeframe, and the testing equipment must be calibrated as prescribed in CGA C–1. All testing equipment and pressure indicating devices must be accurate within the parameters defined in CGA C–1. Determination of expansion properties is not required. (ii) Each cylinder must be tested to a minimum of two (2) times service pressure and show no defect. (3) Burst testing. (i) For purposes of burst testing, each 1,000 cylinders or fewer successively produced each day constitutes a lot. All cylinders of a lot must be of identical size, construction heat treatment, finish, and quality. (ii) One cylinder must be selected from each lot and be hydrostatically pressure tested to destruction. If this cylinder bursts below five (5) times the service pressure, then two additional cylinders from the same lot as the previously tested cylinder must be selected and subjected to this test. If either of these cylinders fails by bursting below five (5) times the service pressure then the entire lot must be condemned. * * * * * ■ 34. In § 178.56, revise paragraph (i) to read as follows: * * * * * (i) Pressure testing. Each cylinder must successfully withstand a pressure test as follows: (1) Lot testing. (i) At least one (1) cylinder selected at random out of each lot of 200 or fewer must be tested by water-jacket or direct expansion method as prescribed in CGA C–1 (IBR; see § 171.7 of this subchapter). The testing equipment must be calibrated as prescribed in CGA C–1. All testing equipment and pressure indicating devices must be accurate within the parameters defined in CGA C–1. VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 * * * * (i) Pressure testing. Each cylinder, before insulating and jacketing, must successfully withstand a pressure test as follows: (1) The cylinder must be tested by water-jacket, direct expansion, or proof pressure test methods as prescribed in CGA C–1 (IBR; see § 171.7 of this subchapter). The testing equipment must be calibrated as prescribed in CGA C–1. All testing equipment and pressure indicating devices must be accurate within the parameters defined in CGA C–1. PO 00000 Frm 00034 Fmt 4701 Sfmt 4702 (2) Each cylinder must be tested to a minimum of two (2) times service pressure. (3) The minimum test pressure must be maintained at least 30 seconds and sufficiently longer to ensure complete expansion. Any internal pressure applied after heat-treatment and prior to the official test may not exceed 90 percent of the test pressure. If, due to failure of the test apparatus or operator error, the test pressure cannot be maintained, the test may be repeated at a pressure increased by 10 percent or 100 psig, whichever is lower. (4) There must be no evidence of leakage, visible distortion or other defect. * * * * * ■ 36. In § 178.58, revise paragraph (i) to read as follows: § 178.58 Specification 4DA welded steel cylinders for aircraft use. * * * * * (i) Pressure testing. Each cylinder must successfully withstand a pressure test as follows: (1) The test must be by water-jacket or direct expansion method as prescribed in CGA C–1 (IBR; see § 171.7 of this subchapter). The testing equipment must be calibrated as prescribed in CGA C–1. All testing equipment and pressure indicating devices must be accurate within the parameters defined in CGA C–1. (2) Each cylinder must be tested to a minimum of two (2) times service pressure. (3) The minimum test pressure must be maintained at least 30 seconds and sufficiently longer to ensure complete expansion. Any internal pressure applied after heat-treatment and prior to the official test may not exceed 90 percent of the test pressure. If, due to failure of the test apparatus or operator error, the test pressure cannot be maintained, the test may be repeated at a pressure increased by 10 percent or 100 psig, whichever is lower. (4) Permanent volumetric expansion may not exceed 10 percent of the total volumetric expansion at test pressure. * * * * * ■ 37. In § 178.59, revise paragraph (h) to read as follows: § 178.59 Specification 8 steel cylinders with porous fillings for acetylene. * * * * * (h) Pressure testing. Each cylinder must successfully withstand a pressure test as follows: (1) Lot testing. (i) At least one (1) cylinder selected at random out of each lot of 200 or fewer must be tested by water-jacket or direct expansion method E:\FR\FM\26JYP2.SGM 26JYP2 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules as prescribed in CGA C–1 (IBR; see § 171.7 of this subchapter). The testing equipment must be calibrated as prescribed in CGA C–1. All testing equipment and pressure indicating devices must be accurate within the parameters defined in CGA C–1. (ii) Each cylinder must be tested to a minimum of 750 psig. (iii) The minimum test pressure must be maintained at least 30 seconds and sufficiently longer to ensure complete expansion. Any internal pressure applied after heat-treatment and prior to the official test may not exceed 90 percent of the test pressure. If, due to failure of the test apparatus or operator error, the test pressure cannot be maintained, the test may be repeated at a pressure increased by 10 percent or 100 psig, whichever is lower. (iv) Permanent volumetric expansion may not exceed 10 percent of the total volumetric expansion at test pressure. (v) If the tested cylinder fails, each cylinder remaining in the lot may be tested in lieu of paragraph (h)(2) of this section by the water-jacket or direct expansion method as prescribed in CGA C–1. Those passing are acceptable. (2) Pressure testing. (i) The remaining cylinders in each lot must be pressure tested by the water-jacket, direct expansion or proof pressure test methods as prescribed in CGA C–1. The minimum test pressure must be maintained for a specific timeframe, and the testing equipment must be calibrated as prescribed in CGA C–1. Further, all testing equipment and pressure indicating devices must be accurate within the parameters defined in CGA C–1. Determination of expansion properties is not required. (ii) Each cylinder must be tested between 500 and 600 psig and show no defect. * * * * * ■ 38. In § 178.60, revise paragraph (j) to read as follows: § 178.60 Specification 8AL steel cylinders with porous fillings for acetylene. asabaliauskas on DSK3SPTVN1PROD with PROPOSALS * * * * * (j) Pressure testing. Each cylinder must successfully withstand a pressure test as follows: (1) Lot Testing. (i) At least one (1) cylinder selected at random out of each lot of 200 or less must be tested by water-jacket or direct expansion method as prescribed in CGA C–1 (IBR; see § 171.7 of this subchapter). The testing equipment must be calibrated as prescribed in CGA C–1. All testing equipment and pressure indicating devices must be accurate within the parameters defined in CGA C–1. VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 (ii) Each cylinder must be tested to a minimum of 750 psig. (iii) The minimum test pressure must be maintained at least 30 seconds and sufficiently longer to ensure complete expansion. Any internal pressure applied after heat-treatment and prior to the official test may not exceed 90 percent of the test pressure. If, due to failure of the test apparatus or operator error, the test pressure cannot be maintained, the test may be repeated at a pressure increased by 10 percent or 100 psig, whichever is lower. (iv) Permanent volumetric expansion may not exceed 10 percent of the total volumetric expansion at test pressure. (v) If the tested cylinder fails, each remaining cylinder in the lot may be tested in lieu of paragraph (j)(2) of this section by the water-jacket or direct expansion method as prescribed in CGA C–1. Those passing are acceptable. (2) Pressure testing. (i) The remaining cylinders in each lot must be pressure tested by the water-jacket, direct expansion or proof pressure test methods as prescribed in CGA C–1. The minimum test pressure must be maintained for a specific timeframe, and the testing equipment must be calibrated as prescribed in CGA C–1. Further, all testing equipment and pressure indicating devices must be accurate within the parameters defined in CGA C–1. Determination of expansion properties is not required. (ii) Each cylinder must be tested between 500 and 600 psig and show no defect. * * * * * ■ 39. Revise § 178.61 to read as follows: § 178.61 Specification 4BW welded steel cylinders with electric-arc welded seam. (a) Type, size, pressure, and application. A DOT 4BW cylinder has a spherical or cylindrical design, a water capacity of 1,000 pounds or less, and a service pressure range of 225 to 500 psig. Closures made by the spinning process are not authorized. (1) Spherical designs are permitted to have only one circumferentially electricarc welded seam. (2) Cylindrical designs must be of circumferentially welded electric-arc construction; longitudinally electric-arc welded seams are permitted. (b) Steel. (1) The steel used in the construction of the cylinder must be as specified in table 1 of appendix A to this part. The cylinder manufacturer must maintain a record of intentionally added alloying elements. (2) Material for heads must meet the requirements of paragraph (b)(1) of this section or be open hearth, electric or basic oxygen carbon steel of uniform PO 00000 Frm 00035 Fmt 4701 Sfmt 4702 49011 quality. Content percent may not exceed the following: Carbon 0.25, Manganese 0.60, Phosphorus 0.045, Sulfur 0.050. Heads must be hemispherical or ellipsoidal in shape with a maximum ratio of 2:1. If low carbon steel is used, the thickness of such heads must be determined by using a maximum wall stress of 24,000 psi in the formula described in paragraph (g)(4) of this section. (c) Identification of material. Pressure-retaining materials must be identified by any suitable method that does not compromise the integrity of the cylinder. Plates and billets for hotdrawn cylinders must be marked with the heat number. (d) Manufacture. Cylinders must be manufactured using equipment and processes adequate to ensure that each cylinder produced conforms to the requirements of this subpart and the following: (1) No defect is permitted that is likely to weaken the finished cylinder appreciably. A reasonably smooth and uniform surface is required. Exposed bottom welds on cylinders over 18 inches long must be protected by footrings. Minimum thickness of heads may not be less than 90 percent of the required thickness of the sidewall. Heads must be concave to pressure. (2) Circumferential seams must be by electric-arc welding. Joints must be butt with one member offset (joggle butt) or with a lap joint. Lap joints must have a minimum overlap of at least four (4) times nominal sheet thickness. (3) Longitudinal electric-arc welded seams (in shells) must be of the butt welded type. Welds must be made by a machine process including automatic feed and welding guidance mechanisms. Longitudinal seams must have complete joint penetration, and must be free from undercuts, overlaps or abrupt ridges or valleys. Misalignment of mating butt edges may not exceed 1⁄6 inch of nominal sheet thickness or 1⁄32 inch whichever is less. All joints with nominal sheet thickness up to and including 1⁄8 inch must be tightly butted. When nominal sheet thickness is greater than 1⁄8 inch, the joint must be gapped with maximum distance equal to one-half the nominal sheet thickness or 1⁄32 inch whichever is less. Joint design, preparation, and fit-up must be such that requirements of this paragraph (d) are satisfied. (4) Welding procedures and operators must be qualified in accordance with CGA C–3 (IBR, see § 171.7 of this subchapter). (e) Welding of attachments. The attachment to the tops and bottoms only of cylinders by welding of neckrings, E:\FR\FM\26JYP2.SGM 26JYP2 49012 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules asabaliauskas on DSK3SPTVN1PROD with PROPOSALS footrings, handles, bosses, pads and valve protection rings is authorized provided that such attachments and the portion of the container to which they are attached are made of weldable steel, the carbon content of which may not exceed 0.25 percent. (f) Non-destructive examination. (1) Welds of the cylinders must be subjected to radioscopic or radiographic examination as follows: (2) Radioscopy or radiography must be in conformance with CGA C–3 (IBR; see § 171.7 of this subchapter). Maximum joint efficiency will be 1.0 when each seam is examined completely. Maximum joint efficiency will be 0.90 when one cylinder from each lot of 50 consecutively welded cylinders is spot examined. In addition, one out of the first five cylinders welded following a shutdown of welding operations exceeding four hours must be spot examined. Spot radiographs, when required, must be made of a finished welded cylinder and must include the girth weld for 2 inches in both directions from the intersection of the longitudinal and girth welds and include at least 6 inches of the longitudinal weld. Maximum joint efficiency of 0.75 will be permissible without radiography. When fluoroscopic examination is used, permanent film records need not be retained. (g) Wall thickness. (1) For outside diameters over 6 inches the minimum wall thickness must be 0.078 inch. In any case, the minimum wall thickness must be such that the wall stress calculated by the formula listed in paragraph (g)(2) of this section may not exceed the lesser value of any of the following: (i) The value referenced in paragraph (b) of this section for the particular material under consideration. (ii) One-half of the minimum tensile strength of the material determined as required in paragraph (k) of this section. (iii) 35,000 psi. (2) Stress must be calculated by the following formula: S = [2P(1.3D2 + 0.4d2)]/[E(D2 ¥ d2)] Where: S = wall stress, psi; P = service pressure, psig; D = outside diameter, inches; d = inside diameter, inches; E = joint efficiency of the longitudinal seam (from paragraph (d) of this section). (3) For a cylinder with a wall thickness less than 0.100 inch, the ratio of tangential length to outside diameter may not exceed 4 to 1 (4:1). (h) Heat treatment. Cylinders must be heat treated in accordance with the following requirements: VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 (1) Each cylinder must be uniformly and properly heat treated prior to test by the applicable method referenced in table 1 of appendix A to this part. Heat treatment must be accomplished after all forming and welding operations, except that when brazed joints are used, heat treatment must follow any forming and welding operations, but may be done before, during or after the brazing operations (see § 178.51(m) of this subpart for weld repairs). (2) Heat treatment is not required after welding of weldable low-carbon parts to attachments of similar material which have been previously welded to the top or bottom of cylinders and properly heat treated, provided such subsequent welding does not produce a temperature in excess of 400 °F in any part of the top or bottom material. (i) Openings in cylinders. Openings in cylinders must comply with the following requirements: (1) All openings must be in heads or bases. (2) Each opening in a spherical-type cylinder must be provided with a fitting, boss, or pad of weldable steel securely attached to the cylinder by fusion welding. (3) Each opening in a cylindrical-type cylinder must be provided with a fitting, boss, or pad securely attached to the cylinder by welding. (4) If threads are used, they must comply with the following: (i) Threads must be clean cut, even, without checks, and tapped to gauge. (ii) Taper threads must be of length not less than as specified for American Standard Taper Pipe Threads. (iii) Straight threads, having at least four (4) engaged threads, must have a tight fit and calculated shear strength at least ten (10) times the test pressure of the cylinder. Gaskets, adequate to prevent leakage, are required. (iv) A brass fitting may be brazed to the steel boss or flange on cylinders used as component parts of handheld fire extinguishers. (j) Pressure testing. Each cylinder must successfully withstand a pressure test as follows: (1) Lot testing. (i) At least one cylinder randomly selected out of each lot of 200 or less must be tested by the waterjacket or direct expansion method as prescribed in CGA C–1 (IBR, see § 171.7 of this subchapter). The testing equipment must be calibrated as prescribed in CGA C–1. All testing equipment and pressure indicating devices must be accurate within the parameters defined in CGA C–1. (ii) Each cylinder must be tested to a minimum of two (2) times service pressure. PO 00000 Frm 00036 Fmt 4701 Sfmt 4702 (iii) The minimum test pressure must be maintained at least 30 seconds and sufficiently longer to ensure complete expansion. Any internal pressure applied after heat-treatment and prior to the official test may not exceed 90 percent of the test pressure. If, due to failure of the test apparatus or operator error, the test pressure cannot be maintained, the test may be repeated at a pressure increased by 10 percent or 100 psig, whichever is lower. (iv) Permanent volumetric expansion may not exceed 10 percent of the total volumetric expansion at test pressure. (2) Pressure testing. (i) The remaining cylinders in each lot must be pressure tested by the water-jacket, direct expansion or proof pressure test methods as prescribed in CGA C–1. The minimum test pressure must be maintained for a specific timeframe, and the testing equipment must be calibrated as prescribed in CGA C–1. Further, all testing equipment and pressure indicating devices must be accurate within the parameters defined in CGA C–1. Determination of expansion properties is not required. (ii) Each cylinder must be tested to a minimum of two (2) times service pressure and show no defect. (3) Burst testing. (i) One finished cylinder selected at random out of each lot of 500 or less must be hydrostatically tested to four (4) times service pressure without bursting. (k) Mechanical tests. Mechanical tests must be conducted to determine yield strength, tensile strength, elongation as a percentage, and reduction of area of material as a percentage, as follows: (1) Specimens must be taken from one cylinder after heat treatment as illustrated in appendix A to subpart C of this part, chosen at random from each lot of 200 or fewer, as follows: (i) Body specimen. One specimen must be taken longitudinally from the body section at least 90 degrees away from the weld. (ii) Head specimen. One specimen must be taken from either head on a cylinder when both heads are made of the same material. However, if the two heads are made of differing materials, a specimen must be taken from each head. (iii) If due to welded attachments on the top head there is insufficient surface from which to take a specimen, it may be taken from a representative head of the same heat treatment as the test cylinder. (2) Specimens must conform to the following: (i) When a cylinder wall is 3⁄16 inch thick or less, one the following gauge lengths is authorized: A gauge length of 8 inches with a width not over 11⁄2 E:\FR\FM\26JYP2.SGM 26JYP2 asabaliauskas on DSK3SPTVN1PROD with PROPOSALS Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules inches, a gauge length of 2 inches with a width not over 11⁄2 inches, or a gauge length at least twenty-four (24) times the thickness with a width not over six (6) times the thickness. (ii) The specimen, exclusive of grip ends, may not be flattened. Grip ends may be flattened to within 1 inch of each end of the reduced section. (iii) When size of the cylinder does not permit securing straight specimens, the specimens may be taken in any location or direction and may be straightened or flattened cold, by pressure only, not by blows. When specimens are taken and prepared in this manner, the inspector’s report must show in connection with the record of physical tests detailed information in regard to such specimens. (iv) Heating of a specimen for any purpose is not authorized. (3) The yield strength in tension must be the stress corresponding to a permanent strain of 0.2 percent of the gauge length. The following conditions apply: (i) The yield strength must be determined by either the ‘‘off-set’’ method or the ‘‘extension under load’’ method as prescribed in ASTM E 8 (IBR, see § 171.7 of this subchapter). (ii) In using the ‘‘extension under load’’ method, the total strain (or ‘‘extension under load’’), corresponding to the stress at which the 0.2-percent permanent strain occurs may be determined with sufficient accuracy by calculating the elastic extension of the gauge length under appropriate load and adding thereto 0.2 percent of the gauge length. Elastic extension calculations must be based on an elastic modulus of 30,000,000. In the event of controversy, the entire stress-strain diagram must be plotted and the yield strength determined from the 0.2-percent offset. (iii) For the purpose of strain measurement, the initial strain reference must be set while the specimen is under a stress of 12,000 psi, and the strain indicator reading must be set at the calculated corresponding strain. (iv) Cross-head speed of the testing machine may not exceed 1⁄8 inch per minute during yield strength determination. (l) Elongation. Mechanical test specimens must show at least a 20 percent elongation. However, elongation percentages may be reduced numerically by one (1) for each 7,500 psi of tensile strength above 50,000 psi to a maximum of four (4) increments (i.e., 30,000 psi). (m) Tests of welds. Welds must be subjected to the following tests: (1) Tensile test. A specimen must be removed from one cylinder of each lot VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 of 200 or fewer. The specimen must be taken from across the longitudinal seam and must be prepared and tested in conformance with the requirements of CGA C–3 (IBR, see § 171.7 of this subchapter). (2) Guided bend test. A root bend test specimen must be removed from the cylinder or welded test plate used for the tensile test specified in paragraph (m)(1) of this section. Specimens must be taken from across the longitudinal seam and must be prepared and tested in conformance with the requirements of CGA C–3. If the specimen fails to meet the requirements, one specimen each must be taken from two additional cylinders or welded test plates from the same lot as the previously tested cylinder or added test plate and tested. If either of these latter two specimens fails to meet the requirements, the entire lot represented must be condemned. (3) Alternate guided bend test. This test may be used and must be as required by CGA C–3. The specimen must be bent until the elongation at the outer surface, adjacent to the root of the weld, between the lightly scribed gauge lines a to b, must be at least 20 percent, except that this percentage may be reduced for steels having a tensile strength in excess of 50,000 psi, as provided in paragraph (l) of this section. Should this specimen fail to meet the requirements, one additional specimen such must be taken from two additional cylinders or welded test plates from the same lot and tested as the previously tested cylinder or added test plate. If either of these latter two specimens fails to meet the requirements, the entire lot represented must be condemned. (n) Rejected cylinders. (1) Unless otherwise stated, if a sample cylinder or specimen taken from a lot of cylinders fails the prescribed test, then two additional specimens must be selected from the same lot and subjected to the prescribed test. If either of these fails the test, then the entire lot must be rejected. (2) Reheat treatment of condemned cylinders. Reheat treatment is authorized for a condemned cylinder in accordance with this paragraph. After reheat treatment, a cylinder must pass all prescribed tests in this section to be considered acceptable. Repair of welded seams by welding is authorized. For cylinders less than or equal to an outside diameter of 6 inches, welded seam repairs greater than 1 inch in length shall require reheat treatment of the cylinder. For cylinders greater than an outside diameter of 6 inches, welded seam repairs greater than 3 inches in length shall require reheat treatment. (o) Markings. (1) Markings must be as required in § 178.35 of this subpart and PO 00000 Frm 00037 Fmt 4701 Sfmt 4702 49013 in addition must be stamped plainly and permanently in one of the following locations on the cylinder: (i) On shoulders and top heads whose wall thickness is not less than 0.087 inch thick. (ii) On side wall adjacent to top head for side walls not less than 0.090 inch thick. (iii) On a cylindrical portion of the shell that extends beyond the recessed bottom of the cylinder constituting an integral and non-pressure part of the cylinder. (iv) On a plate attached to the top of the cylinder or permanent part thereof; sufficient space must be left on the plate to provide for stamping at least six retest dates; the plate must at least 1/16-inch thick and must be attached by welding at a temperature of 1,100 °F, throughout all edges of the plate. (v) On the neck, neckring, valve boss, valve protection sleeve, or similar part permanently attached to the top of the cylinder. (vi) On the footring permanently attached to the cylinder, provided the water capacity of the cylinder does not exceed 30 pounds. (2) Embossing the cylinder head or side wall is not permitted. (p) Inspector’s report. In addition to the information required by § 178.35 of this subpart, the inspector’s report must indicate the type and amount of radiography. ■ 40. In § 178.65, revise paragraph (f) to read as follows: § 178.65 Specification 39 non-reusable (non-refillable) cylinders. * * * * * (f) Pressure testing. (1) Each cylinder must be proof pressure tested as prescribed in CGA C–1 (IBR, see § 171.7 of this subchapter). The minimum test pressure must be maintained for a specific timeframe, and the testing equipment must be calibrated as prescribed in CGA C–1. All testing equipment and pressure indicating devices must be accurate within the parameters defined in CGA C–1. (2) The leakage test must be conducted by submersion under water or by some other method that will be equally sensitive. (3) If the cylinder leaks, evidences visible distortion or evidences any other defect while under test, it must be condemned (see paragraph (h) of this section). * * * * * ■ 41. In § 178.68: ■ a. Revise paragraphs (b), (e), (h), (j) introductory text, (j)(1), (k), (l) and (m); ■ b. Redesignate paragraph (n) as paragraph (o); and E:\FR\FM\26JYP2.SGM 26JYP2 49014 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules c. Add new paragraph (n). The revisions, redesignation, and addition read as follows: ■ § 178.68 Specification 4E welded aluminum cylinders. * * * * * (b) Authorized material. The cylinder must be constructed of aluminum of uniform quality. The following chemical analyses are authorized: TABLE 1—AUTHORIZED MATERIALS Chemical analysis— limits in percent 5154 Designation asabaliauskas on DSK3SPTVN1PROD with PROPOSALS Iron plus silicon .................. Copper ............................... Manganese ........................ Magnesium ........................ Chromium .......................... Zinc .................................... Titanium ............................. Others, each ...................... Others, total ....................... Aluminum ........................... 0.45 maximum. 0.10 maximum. 0.10 maximum. 3.10/3.90. 0.15/0.35. 0.20 maximum. 0.20 maximum. 0.05 maximum. 0.15 maximum. remainder. Note to Table 1: The aluminum used in the construction of the cylinder must be as specified in Table 1. The cylinder manufacturer must maintain a record of intentionally added alloying elements. * * * * * (e) Welding. The attachment to the tops and bottoms only of cylinders by welding of neckrings, flanges, footrings, handles, bosses, pads, and valve protection rings is authorized. However, such attachments and the portion of the cylinder to which it is attached must be made of weldable aluminum alloys. * * * * * (h) Pressure testing. Each cylinder must successfully withstand a pressure test as follows: (1) All cylinders with a wall stress greater than 18,000 psi must be tested by water-jacket or direct expansion method as prescribed in CGA C–1 (IBR, see § 171.7 of this subchapter). The testing equipment must be calibrated as prescribed in CGA C–1. All testing equipment and pressure indicating devices must be accurate within the parameters defined in CGA C–1. (i) Each cylinder must be tested to a minimum of two (2) times service pressure. (ii) The minimum test pressure must be maintained at least 30 seconds and sufficiently longer to ensure complete expansion. Any internal pressure applied after heat-treatment and prior to the official test may not exceed 90 percent of the test pressure. If, due to failure of the test apparatus or operator error, the test pressure cannot be VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 maintained, the test may be repeated at a pressure increased by 10 percent or 100 psig, whichever is lower. (iii) Permanent volumetric expansion may not exceed 12 percent of the total volumetric expansion at test pressure. (2) Lot testing. (i) Cylinders with a wall stress of 18,000 psi or less may be lot tested. At least one cylinder randomly selected out of each lot of 200 or less must be tested by the waterjacket or direct expansion method as prescribed in CGA C–1. The testing equipment must be calibrated as prescribed in CGA C–1. All testing equipment and pressure indicating devices must be accurate within the parameters defined in CGA C–1. (ii) Each cylinder must be tested to a minimum of two (2) times service pressure. (iii) The minimum test pressure must be maintained at least 30 seconds and sufficiently longer to ensure complete expansion. Any internal pressure applied after heat-treatment and prior to the official test may not exceed 90 percent of the test pressure. If, due to failure of the test apparatus or operator error, the test pressure cannot be maintained, the test may be repeated at a pressure increased by 10 percent or 100 psig, whichever is lower. (iv) Permanent volumetric expansion may not exceed 12 percent of the total volumetric expansion at test pressure. (3) Pressure testing. (i) For cylinders with a wall stress of 18,000 psi or less, the remaining cylinders of the lot must be pressure tested by the water-jacket, direct expansion or proof pressure test methods as defined in CGA C–1. The minimum test pressure must be maintained for a specific timeframe, and the testing equipment must be calibrated as prescribed in CGA C–1. Further, all testing equipment and pressure indicating devices must be accurate within the parameters defined in CGA C–1. Determination of expansion properties is not required. (ii) Each cylinder must be tested to a minimum of two (2) times service pressure and show no defect. (4) Burst Testing. One (1) finished cylinder selected at random out of each lot of 1000 or less must be hydrostatically tested to four (4) times service pressure without bursting. Inability to meet this requirement must result in condemnation of the lot. * * * * * (j) Mechanical test. A mechanical test must be conducted to determine yield strength, tensile strength, elongation as a percentage, and reduction of area of material as a percentage as follows: (1) The test is required on two (2) specimens removed from one cylinder PO 00000 Frm 00038 Fmt 4701 Sfmt 4702 or part thereof as illustrated in appendix A to subpart C of this part taken at random out of each lot of 200 or fewer. * * * * * (k) Acceptable results for mechanical tests. An acceptable result of the mechanical test requires a minimum tensile strength as defined in paragraph (f)(1)(ii) of this section, an elongation to at least 7 percent and yield strength not over 80 percent of tensile strength. (l) Weld tests. Welds of the cylinder are required to successfully pass the following tests: (1) Reduced section tensile test. A specimen must be removed from the cylinder used for the mechanical tests specified in paragraph (j) of this section. The specimen must be taken from across the seam; edges must be parallel for a distance of approximately 2 inches on either side of the weld. The specimen must be fractured in tension. The actual breaking stress must be a minimum of at least 30,000 psi. The apparent breaking stress calculated on the minimum design wall thickness must be a minimum of two (2) times the stress calculated under paragraph (f)(2) of this section. If the specimen fails to meet the requirements, the lot must be condemned except that specimens may be taken from two (2) additional cylinders from the same lot as the previously tested specimens. If either of the latter specimens fails to meet requirements, the entire lot represented must be condemned. (2) Guided bend test. A bend test specimen must be removed from the cylinder used for the mechanical test specified in paragraph (j) of this section. The specimen must be taken across the circumferential seam, must be a minimum of 11⁄2 inches wide, edges must be parallel and rounded with a file, and back-up strip, if used, must be removed by machining. The specimen must be tested as follows: (i) The specimen must be bent to refusal in the guided bend test jig as illustrated in CGA C–3 (IBR, see § 171.7 of this subchapter). The root of the weld (inside surface of the cylinder) must be located away from the ram of the jig. The specimen must not show a crack or other open defect exceeding 1⁄8 inch in any direction upon completion of the test. Should this specimen fail to meet the requirements, one additional specimen must be taken from two additional cylinders from the same lot and tested. If either of the latter specimens fails to meet requirements, the entire lot represented must be condemned. (ii) Alternate guided bend test. This test may be used as an alternate to the E:\FR\FM\26JYP2.SGM 26JYP2 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules guided bend test. The test specimen must be in conformance with The Aluminum Association’s ‘‘Welding Aluminum: Theory and Practice, Fourth Edition, 2002’’ (IBR, see § 171.7 of this subchapter). If the specimen fails to meet the requirements, one additional specimen must be taken from two additional cylinders or welded test plates from the same lot and tested. If any of these latter two specimens fails to meet the requirements, the entire lot must be condemned. (m) Condemned cylinders. (1) Unless otherwise stated, if a sample cylinder or specimen taken from a lot of cylinders fails the prescribed test, then two additional specimens must be selected from the same lot and subjected to the prescribed test. If either of these fails the test, then the entire lot must be condemned. (2) Repair of welded seams is authorized. Acceptable cylinders must pass all prescribed tests. (n) Markings. (1) Markings must be as required in § 178.35 of this subpart and in addition must be stamped plainly and permanently in one of the following locations on the cylinder: (i) On the neck, neckring, valve boss, valve protection sleeve, or similar part permanently attached to the top of the cylinder. (ii) On the footring permanently attached to the cylinder, provided the water capacity of the cylinder does not exceed 30 pounds. (2) Embossing the cylinder head or side wall is not permitted. * * * * * ■ 42. In § 178.70, revise paragraph (d) to read as follows: § 178.70 Approval of UN pressure receptacles. asabaliauskas on DSK3SPTVN1PROD with PROPOSALS * * * * * (d) Modification of approved pressure receptacle design type. Modification of an approved UN/ISO pressure receptacle design type is not authorized without the approval of the Associate Administrator. However, modification of an approved UN/ISO pressure receptacle design type is authorized without an additional approval of the Associate Administrator provided the design modification is covered under the UN/ISO standard for the design type. A manufacturer seeking modification of an approved UN/ISO pressure receptacle design type may be required to submit design qualification test data to the Associate Administrator before production. * * * * * VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 PART 180—CONTINUING QUALIFICATION AND MAINTENANCE OF PACKAGINGS 43. The authority citation for part 180 continues to read as follows: ■ Authority: 49 U.S.C. 5101–5128; 49 CFR 1.81 and 1.97. 44. In § 180.203: a. Add definitions for the words ‘‘accuracy,’’ ‘‘accuracy grade,’’ ‘‘actual test pressure,’’ ‘‘calibrated cylinder,’’ ‘‘error,’’ ‘‘master gauge,’’ ‘‘mobile unit,’’ ‘‘over-pressurized,’’ ‘‘percent permanent expansion,’’ ‘‘precision,’’ ‘‘proof pressure test,’’ ‘‘reference gauge,’’ and ‘‘service pressure’’ in alphabetical order; and ■ b. Revise the definition for the words ‘‘commercially free of corrosive components,’’ ‘‘defect,’’ and ‘‘test pressure.’’ The additions and revisions read as follows: ■ ■ § 180.203 Definitions * * * * * Accuracy means the conformance of a particular reading to a known standard. Accuracy is expressed as the percentage of error from, or degree of closeness to, the true value, such as the difference between the measurement result displayed by the instrument and the value obtained when a measurement standard is used to perform the measurement. This value may be represented as a percent of full scale. Accuracy grade means the inherent quality of the device. It expresses the maximum error allowed for the device at any reading. Accuracy grade is expressed as a percentage of the full scale of the device. Actual test pressure means the pressure applied to a cylinder during a requalification test. Calibrated cylinder means a cylinder that has certified calibration points of pressure with corresponding expansion values. It is a secondary, derived standard used for the verification and demonstration of test system accuracy and integrity. Commercially free of corrosive components means a hazardous material having a moisture content less than 55 ppm and free of components that will adversely react with the cylinder (e.g. chemical stress corrosion). * * * * * Defect means an imperfection requiring a cylinder to be rejected or condemned. * * * * * Error means the difference between the measured values and the true value. * * * * * PO 00000 Frm 00039 Fmt 4701 Sfmt 4702 49015 Master gauge means a pressure indicating device that is used as a calibration standard, has an inherent accuracy grade equal to or better than the requirement for the pressure indicating device in the test apparatus, and is an instrument not used in the daily performance of cylinder testing. Mobile unit means a vehicle specifically authorized under a RIN to carry out requalification operations identified under the RIN within a geographic area no more than 100 miles from the principle place of business of the RIN holder. Mobile units must comply with the requirements outlined in the approval issuance letter from the Associate Administrator for Hazardous Materials Safety (see § 107.805 of subchapter A of this chapter). * * * * * Over-pressurized means a condition in which the internal pressure applied to a cylinder has reached or exceeded the yield point of the cylinder. Percent permanent expansion means the ratio of permanent expansion to total expansion, expressed as a percentage. The calculation for percent permanent expansion is the permanent expansion divided by total expansion times 100. * * * * * Precision of a measurement means the degree of scatter of the recorded values when the measurement is repeated a number of times under the same conditions. Proof pressure test means a pressure test by interior pressurization without the determination of a cylinder’s expansion. A gas (e.g., air) or a liquid (e.g., water) is used as a means to achieve interior pressurization. * * * * * Reference gauge means a pressure indicating device that is used in the daily verification of a proof test system, and has an inherent accuracy equal to or better than the requirement for the device to be checked. * * * * * Service pressure means the rated service pressure marked on the cylinder. Test pressure means the minimum prescribed pressure required for the requalification of a cylinder. * * * * * ■ 45. In § 180.205: ■ a. Revise paragraphs (c) introductory text, (d), (g)(3), (h)(3), (i)(1)(viii), (i)(2), and (i)(3); and ■ b. Add paragraphs (f)(5), (f)(6), (i)(1)(ix), (i)(1)(x), (i)(1)(xi) and (j). The additions and revisions read as follows: E:\FR\FM\26JYP2.SGM 26JYP2 49016 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules § 180.205 General requirements for requalification of specification cylinders. asabaliauskas on DSK3SPTVN1PROD with PROPOSALS * * * * * (c) Periodic requalification of cylinders. Each cylinder bearing a DOTspecification marking must be requalified and marked as specified in the Requalification Table in this subpart. Each cylinder bearing a DOT special permit (or exemption) number must be requalified and marked in conformance with this section and the terms of the applicable special permit (or exemption). No cylinder may be filled with a hazardous material and offered for transportation in commerce unless that cylinder has been successfully requalified and marked in conformance with this subpart. A cylinder may be requalified at any time during or before the month and year that the requalification is due. However, a cylinder filled before the requalification becomes due may remain in service until it is emptied. A cylinder with a specified service life may not be refilled and offered for transportation after its authorized service life has expired. * * * * * (d) Conditions requiring test and inspection of cylinders. Without regard to any other periodic requalification requirements, a cylinder must be tested and inspected in accordance with this section prior to further use if— (1) The cylinder shows evidence of dents, corrosion, cracked or abraded areas, leakage, or any other condition that might render it unsafe for use in transportation; (2) The cylinder has been in an accident and has been damaged to an extent that may adversely affect its lading retention capability; (3) The cylinder shows evidence of or is known to have thermal damage, or have been over-heated; (4) Except as provided in § 180.212 of this subpart, the cylinder shows evidence of grinding; or (5) The Associate Administrator determines that the cylinder may be in an unsafe condition. * * * * * (f) * * * (5) Shot blasting of cylinders is permitted. Grinding, sanding, or any other removal of wall thickness of a cylinder is not permitted, except by an authorized facility, as provided in § 180.212 of this subpart for the removal of surface corrosion. (6) Chasing of cylinder threads to clean them is permitted, but removal of metal must not occur. Re-tapping of cylinder threads is not permitted, except by the original manufacturer, as provided in § 180.212 of this subpart. VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 (g) * * * (3) Each day before retesting, the retester shall confirm, by using a calibrated cylinder or other method authorized in writing by the Associate Administrator, that: (i) The pressure-indicating device (PID), as part of the retest equipment, is accurate within ±1.0% of the prescribed test pressure of any cylinder tested that day. The PID must meet Industrial Class 1 (±1.0% deviation from the end value) with a scale appropriate to the test pressure of the cylinder. The accuracy of the PID within the test system can be demonstrated at any point within 500 psig of the actual test pressure for test pressures at or above 3,000 psig, or 10% of the actual test pressure for test pressures below 3,000 psig. (ii) The expansion-indicating device (EID), as part of the retest equipment, gives a stable reading of expansion and is accurate to ±1.0% of the total expansion of any cylinder tested or 0.1 cc, whichever is larger. The EID must be accurate (±1.0% deviation from the end value) of its full scale. The weigh scales must be capable of providing total expansion measurements to an accuracy of ±1.0% or 0.05 ounce (1.5 g), whichever is greater. * * * * * (h) * * * (3) Unless the cylinder is repaired or rebuilt in conformance with requirements in § 180.211of this subpart, it may not be filled with a hazardous material and offered for transportation where use of a specification packaging is required. * * * * * (i) * * * (1) * * * (viii) For an aluminum or an aluminum-lined composite special permit cylinder, the cylinder is known to have been or shows evidence of having been overheated. Arc burns must be considered evidence of overheating. (ix) The cylinder is known to have been or shows evidence of having been over-pressurized. (x) For a cylinder with a specified service life, its authorized service life has expired. (xi) The cylinder has been stamped on the sidewall, except as provided in part 178 of this subchapter. (2) When a cylinder must be condemned, the requalifier must— (i) Communicate condemnation of the cylinder as follows: (A) Stamp a series of X’s over the DOT-specification number and the marked pressure or stamp ‘‘CONDEMNED’’ on the shoulder, top head, or neck using a steel stamp; (B) For composite cylinders, securely affix to the cylinder a label with the PO 00000 Frm 00040 Fmt 4701 Sfmt 4702 word ‘‘CONDEMNED’’ overcoated with epoxy near, but not obscuring, the original cylinder manufacturer’s label; or (C) As an alternative to the stamping or labeling as described in this paragraph (i)(2), at the direction of the owner, the requalifier may render the cylinder incapable of holding pressure; and (ii) Notify the cylinder owner, in writing, that the cylinder is condemned and may not be filled with hazardous material and offered for transportation in commerce where use of a specification packaging is required. (3) No person may remove, obliterate, or alter the required condemnation communication of paragraph (i)(2) of this section. (j) Training materials. Training materials (such as CGA C–1.1; see § 171.7, Table I of this subchapter) may be used for training persons who requalify cylinders using the volumetric expansion test method. ■ 46. In § 180.207, revise paragraphs (a)(3), (b)(2), (c) introductory text, (d) introductory text, (d)(1), and (d)(3) to read as follows: § 180.207 Requirements for requalification of UN pressure receptacles. (a) * * * (3) A pressure receptacle with a specified service life may not be requalified after its authorized service life has expired, but must be condemned in accordance with § 180.205(i)(x) of this subpart. (b) * * * (2) Each pressure receptacle that fails requalification must be condemned in conformance with § 180.205(i) of this subpart or the applicable ISO requalification standard. * * * * * (c) Requalification interval. Each UN pressure receptacle that becomes due for periodic requalification must be requalified at the interval specified in the following table before it is filled: * * * * * * * * (d) Requalification procedures. Each UN pressure receptacle must be requalified in conformance with the procedures contained in the following standards, as applicable. Furthermore, when a pressure test is performed on a UN pressure receptacle, the test must be a water jacket volumetric expansion test suitable for the determination of the cylinder expansion or a hydraulic proof pressure test. The test equipment must conform to the accuracy requirements in § 180.205(g) of this subpart. Alternative methods (e.g., acoustic emission) or requalification procedures may be E:\FR\FM\26JYP2.SGM 26JYP2 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules performed if prior approval has been obtained in writing from the Associate Administrator. (1) Seamless steel: Each seamless steel UN pressure receptacle, including MEGC’s pressure receptacles exceeding 150 L capacity, must be requalified in conformance with ISO 6406 (IBR, see § 171.7 of this subchapter). However, UN cylinders with a tensile strength greater than or equal to 950 MPa must be requalified by ultrasonic examination in conformance with ISO 6406. * * * * * (3) Dissolved acetylene UN cylinders: Each dissolved acetylene cylinder must be requalified in conformance with ISO 10462 (IBR, see § 171.7 of this subchapter). The porous mass and the shell must be requalified no sooner than five (5) years and no later than ten (10) years from the date of manufacture. Thereafter, subsequent requalifications of the shell must be performed at least once every ten (10) years. * * * * * ■ 47. In § 180.209, revise paragraphs (a), (b), (c), (e), (g), (l)(1) and (m) to read as follows: 49017 § 180.209 Requirements for requalification of specification cylinders. (a) Periodic qualification of cylinders. Each specification cylinder that becomes due for periodic requalification, as specified in the following table, must be requalified and marked in conformance with the requirements of this subpart before it is filled. Requalification records must be maintained in conformance with § 180.215 of this subpart. Table 1 follows: TABLE 1—REQUALIFICATION OF CYLINDERS Specification under which cylinder was made Minimum test pressure (psig) 1 DOT 3 ................................................................. DOT 3A, 3AA ..................................................... 3000 psig ......................................................... 5/3 times service pressure, except noncorrosive service (see § 180.209(g)). 5/3 times service pressure ............................... 5/3 times service pressure ............................... 2 times service pressure (see § 180.209(g)) ... Test not required. 5/3 times service pressure ............................... 5/3 times service pressure ............................... 2 times service pressure (see § 180.209(g)) ... 2 times service pressure, except non-corrosive service (see § 180.209(g)). 2 times service ................................................. 2 times service pressure, except non-corrosive (see § 180.209(g)). Test not required. ...................................................................... See current exemption or special permit ......... As marked on cylinder, but not less than 5/3 of any service or working pressure marking. DOT 3AL2 ........................................................... DOT 3AX, 3AAX ................................................. 3B, 3BN .............................................................. 3E ....................................................................... 3HT ..................................................................... 3T ....................................................................... 4AA480 ............................................................... 4B, 4BA, 4BW, 4B–240ET ................................. 4D, 4DA, 4DS ..................................................... DOT 4E .............................................................. 4L ........................................................................ 8, 8AL ................................................................. Exemption or special permit cylinder ................. Foreign cylinder (see § 173.301(j) of this subchapter for restrictions on use). 1 For asabaliauskas on DSK3SPTVN1PROD with PROPOSALS 2 For Requalification period (years) 5. 5, or 12 (see § 180.209(b), (f), (h), and (j)). 5, or 12 (see §§ 180.209(j) and (m)). 5 5 or 10 (see § 180.209(f)). 3 (see §§ 180.209(k) and 180.213(c)). 5. 5 or 10 (see § 180.209(h)). 5, 10, or 12 (see § 180.209(e), (f), and (j)). 5. 5 or 10 ((see §§ 180.209(e)). 10 or 20 (see § 180.209(i)). See current exemption or special permit. 5 (see §§ 180.209(l) and 180.213(d)(2)). cylinders not marked with a service pressure, see § 173.301a(b) of this subchapter. special permit (or exemption) aluminum cylinders marked DOT 3AL, see § 173.23(c) of this subchapter. (b) DOT 3A or 3AA cylinders. (1) A cylinder conforming to specification DOT 3A or 3AA with a water capacity of 56.7 kg (125 pounds) or less may be marked with a star and requalified every 10 years instead of every 5 years, provided the cylinder conforms to all of the following conditions: (i) The cylinder is used exclusively for air; argon; cyclopropane; ethylene; helium; hydrogen; krypton; neon; nitrogen; nitrous oxide; oxygen; sulfur hexafluoride; xenon; chlorinated hydrocarbons, fluorinated hydrocarbons, liquefied hydrocarbons, and mixtures thereof that are commercially free from corroding components; permitted mixtures of these gases (see § 173.301(d) of this subchapter); and permitted mixtures of these gases with up to 30 percent by volume of carbon dioxide, provided the gas has a moisture content less than 55 ppm. (ii) The cylinder is not used in any cascade, bank, group, rack or vehicle. VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 The cylinder is not used in selfcontained underwater breathing apparatus (SCUBA), self-contained breathing apparatus (SCBA), or in an emergency respirator. (iii) The permanent expansion does not exceed 5 percent of the total expansion. (iv) The results of the hydrostatic test meet one of the following requirements: (A) The elastic expansion does not exceed the manufacturer’s marked rejection elastic expansion (REE) limit on the cylinder; (B) The elastic expansion does not exceed the applicable rejection limit tabulated in CGA C–5 (IBR, see § 171.7 of this subchapter); or (C) Either the average wall stress or the maximum wall stress does not exceed the corresponding wall stress limitation determined by computing the REE limit in conformance with CGA C–5. PO 00000 Frm 00041 Fmt 4701 Sfmt 4702 (v) The cylinder is dried immediately after hydrostatic testing to remove all traces of water. (vi) The cylinder is stamped with a five-pointed star at least one-fourth of an inch high immediately following the test date to indicate compliance with this paragraph (b)(1). (2) If a cylinder has not been used exclusively for the gases specifically identified in paragraph (b)(1)(i) of this section, but currently conforms with all other provisions of paragraph (b)(1) of this section, it may be requalified every 10 years instead of every 5 years, only after the cylinder has been retested, marked, and placed into exclusive use and gas service in compliance with paragraph (b)(1) of this section. (3) If, at any time, a cylinder marked with a five-pointed star is used in a manner other than as specified in paragraph (b)(1) of this section, the star following the most recent test date must be obliterated. The cylinder must be requalified within five years from the E:\FR\FM\26JYP2.SGM 26JYP2 49018 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules marked test date, or if the required fiveyear requalification period has passed, the cylinder must be requalified prior to the first filling with a compressed gas. (c) DOT 4-series cylinders. A DOT 4series cylinder, except a 4L cylinder, that at any time shows evidence of a leak, internal or external corrosion, denting, bulging or rough usage to the extent that it is likely to be weakened appreciably, or that has lost 5 percent or more of its official tare weight must be requalified before being refilled and offered for transportation. [Refer to CGA C–6 or C–6.3 (IBR, see § 171.7 of this subchapter), as applicable, regarding cylinder weakening.] After testing, the actual tare weight must be recorded as the new tare weight on the test report and marked on the cylinder. The previous tare weight must be strikelined through, but not obliterated. * * * * * (e) Proof pressure test. A cylinder made in conformance with DOT Specifications 4B, 4BA, 4BW, or 4E protected externally by a suitable corrosion-resistant coating and used exclusively for non-corrosive gas that is commercially free from corroding components may be requalified by volumetric expansion testing or proof pressure testing every 10 years instead of every 5 years. However, a cylinder used for reclaiming, recycling, or recovering refrigerant gases must be requalified by volumetric expansion testing every 5 years. Reclaimed, recycled, or recovered refrigerant gases are considered to be corrosive due to contamination. When subjected to a proof pressure test, as prescribed in CGA C–1 (IBR, see § 171.7 of this subchapter) and consistent with the applicable specification testing requirement in Part 178 of this subchapter, the cylinder must be carefully examined under test pressure and removed from service if a leak or defect is found. * * * * * (g) Visual inspections. A cylinder conforming to a specification listed in the table in this paragraph and used exclusively in the service indicated may, instead of a periodic hydrostatic test, be given a complete external visual inspection at the time periodic requalification becomes due. External visual inspection must be in conformance with CGA C–6 or C–6.3, as applicable (IBR, see § 171.7 of this subchapter). When this inspection is used instead of hydrostatic testing, subsequent inspections are required at five-year intervals after the first inspection. Inspections must be made only by persons holding a current RIN and the results recorded and maintained in conformance with § 180.215 of this subpart. Records must include: date of inspection (month and year); DOTspecification number; cylinder identification (registered symbol and serial number, date of manufacture, and owner); type of cylinder protective coating (including statement as to need of refinishing or recoating); conditions checked (e.g., leakage, corrosion, gouges, dents or digs in shell or heads, broken or damaged footring or protective ring or fire damage); and disposition of cylinder (returned to service, returned to cylinder manufacturer for repairs or condemned). A cylinder passing requalification by the external visual inspection must be marked in conformance with § 180.213 of this subpart. Specification cylinders must be in exclusive service as shown in the following table: Cylinders conforming to— Used exclusively for— DOT 3A, DOT 3AA, DOT 3A480X, DOT 4AA480 ................................... DOT 3A, DOT 3AA, DOT 3A480X, DOT 3B, DOT 4B, DOT 4BA, DOT 4BW. DOT 3A, DOT 3AA, DOT 3A480X, DOT 3B, DOT 4AA480, DOT 4B, DOT 4BA, DOT 4BW. DOT 3A, DOT 3AA, DOT 3A480X, DOT 4B, DOT 4BA, DOT 4BW, DOT 4E. DOT 3A, DOT 3AA, DOT 3A480X, DOT 4B, DOT 4BA, DOT 4BW, DOT 4E. DOT 3A, DOT 3AA, DOT 3A480X, DOT 3B, DOT 4B, DOT 4BA, DOT 4BW, DOT 4E. DOT 3A, DOT 3AA, DOT 3A480X, DOT 3B, DOT 4B, DOT 4BA, DOT 4BW, DOT 4E. Anhydrous ammonia of at least 99.95% purity. Butadiene, inhibited, that is commercially free from corroding components. Cyclopropane that is commercially free from corroding components. DOT 3A, DOT 3AA, DOT 3B, DOT 4B, DOT 4BA, DOT 4BW, DOT 4E DOT 3A, DOT 3AA, DOT 3B, DOT 4B, DOT 4BA, DOT 4BW, DOT 4E DOT 3A, DOT 3AA, DOT 3B, DOT 4B, DOT 4BA, DOT 4BW, DOT 4E DOT 3A, DOT 3AA, DOT 3B, DOT 4B, DOT 4BA, DOT 4BW ............... asabaliauskas on DSK3SPTVN1PROD with PROPOSALS DOT 4B240, DOT 4BW240 ...................................................................... DOT 4BW ................................................................................................. * * * * * (j) Cylinder used as a fire extinguisher. Only a DOT-specification cylinder used as a fire extinguisher in conformance with § 173.309(a) of this subchapter may be requalified in conformance with this paragraph (j). VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 Chlorinated hydrocarbons and mixtures thereof that are commercially free from corroding components. Fluorinated hydrocarbons and mixtures thereof that are commercially free from corroding components. Liquefied hydrocarbon gas that is commercially free of corroding components. Liquefied petroleum gas that meets the detail requirements limits in Table 1 of ASTM 1835, Standard Specification for Liquefied Petroleum (LP) Gases or an equivalent standard containing the same limits. Methylacetylene-propadiene, stabilized, that is commercially free from corroding components. Methylacetylene-propadiene, stabilized, that is commercially free from corroding components. Propylene that is commercially free from corroding components. Anhydrous mono, ditrimethylamines that are commercially free from corroding components. Ethyleneimine, stabilized. Alkali metal alloys, liquid, n.o.s., Alkali metal dispersions or Alkaline earth metal dispersions, Potassium, Potassium Sodium alloys and Sodium that are commercially free of corroding components. (1) A DOT 4B, 4BA, 4B240ET or 4BW cylinder used as a fire extinguisher may be tested as follows: (i) For a cylinder with a water capacity of 5.44 kg (12 pounds) or less, by the water-jacket, direct expansion or proof pressure test methods as prescribed in CGA C–1 (IBR, see § 171.7 of this subchapter). A requalification PO 00000 Frm 00042 Fmt 4701 Sfmt 4702 must be performed by the end of 12 years after the original test date and at 12-year intervals thereafter. (ii) The testing procedures, calibration of the testing equipment, accuracy of the pressure indicating device, accuracy of the testing equipment must be as prescribed in CGA C–1. E:\FR\FM\26JYP2.SGM 26JYP2 49019 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules (iii) Each cylinder must be tested to a minimum of two (2) times service pressure. (iv) When testing using the waterjacket or direct expansion test method, the minimum test pressure must be maintained at least 30 seconds and sufficiently longer to ensure complete expansion. Any internal pressure applied prior to the official test may not exceed 90 percent of the test pressure. If, due to failure of the test apparatus or operator error, the test pressure cannot be maintained, the test may be repeated at a pressure increased by 10 percent or 100 psig, whichever is lower. (v) The permanent volumetric expansion may not exceed 10 percent of total volumetric expansion at test pressure. (vi) When testing using the proof pressure test method, the minimum test pressure must be maintained for a specific time frame as prescribed in CGA C–1. Any internal pressure applied prior to the official test may not exceed 90 percent of the test pressure. If, due to failure of the test apparatus or operator error, the test pressure cannot be maintained, the test may be repeated at a pressure increased by 10 percent or 100 psig, whichever is lower. (vii) When subjected to a proof pressure test, the cylinder must be carefully examined under test pressure and removed from service if a leak or defect is found. (2) For a cylinder having a water capacity over 5.44 kg (12 pounds), by the water-jacket, direct expansion or proof pressure test methods as prescribed in CGA C–1. For the waterjacket or direct expansion test, the requalification must be performed by the end of 12 years after the original test date and at 12-year intervals theafter. For the proof-pressure test, a requalification must be performed by the end of 12 years after the original test date and at seven (7) year intervals. (ii) The testing procedures, calibration of the testing equipment, accuracy of the pressure indicating device, and accuracy of the testing equipment must be as prescribed in CGA C–1. (iii) Each cylinder must be tested to a minimum of two (2) times service pressure. (iv) When testing using the waterjacket or direct expansion test method, the minimum test pressure must be maintained at least 30 seconds and sufficiently longer to ensure complete expansion. Any internal pressure applied prior to the official test may not exceed 90 percent of the test pressure. If, due to failure of the test apparatus or operator error, the test pressure cannot be maintained, the test may be repeated at a pressure increased by 10 percent or 100 psig, whichever is lower. (v) The permanent volumetric expansion may not exceed 10 percent of total volumetric expansion at test pressure. For DOT 4E cylinders, the permanent volumetric expansion may not exceed 12 percent of total volumetric expansion at test pressure. (vi) When testing using the proof pressure test method, the minimum test pressure must be maintained for a specific timeframe as prescribed in CGA C–1 (IBR, see § 171.7 of this subchapter). Any internal pressure applied prior to the official test may not exceed 90 percent of the test pressure. If, due to failure of the test apparatus or operator error, the test pressure cannot be maintained, the test may be repeated at a pressure increased by 10 percent or 100 psig, whichever is lower. (vii) When subjected to a proof pressure test, the cylinder must be carefully examined under test pressure and removed from service if a leak or defect is found. (3) A DOT 3A, 3AA, or 3AL cylinder must be requalified by: (i) The water-jacket or direct expansion method. A requalification must be performed 12 years after the original test date and at 12-year intervals thereafter. (ii) The testing procedures, calibration of the testing equipment, accuracy of the pressure indicating device, accuracy of the testing equipment must be as prescribed in CGA C–1. (iii) Each cylinder must be tested to a minimum of 5⁄3 times service pressure. (iv) When testing using the waterjacket or direct expansion test method, the minimum test pressure must be maintained at least 30 seconds and sufficiently longer to ensure complete expansion. Any internal pressure applied prior to the official test may not exceed 90 percent of the test pressure. If, due to failure of the test apparatus or operator error, the test pressure cannot be maintained, the test may be repeated at a pressure increased by 10 percent or 100 psig, whichever is lower. (v) The permanent volumetric expansion may not exceed 10 percent of total volumetric expansion at test pressure. For DOT 4E cylinders, the permanent volumetric expansion may not exceed 12 percent of total volumetric expansion at test pressure. * * * * * (l) * * * (1) It has been inspected, tested and marked in conformance with the procedures and requirements of this subpart or the Associate Administrator has authorized the filling company to fill foreign cylinders under an alternative method of qualification; and * * * * * (m) DOT–3AL cylinders manufactured of 6351–T6 aluminum alloy. In addition to the periodic requalification and marking described in § 180.205 of this subpart, each cylinder manufactured of aluminum alloy 6351–T6 with a marked service pressure equal to or exceeding 1,800 psi must be requalified and inspected for sustained load cracking in conformance with the non-destructive examination method described in the following table. A cylinder with cracks must be condemned in conformance with § 180.205(i) of this subpart. REQUALIFICATION AND INSPECTION OF DOT–3AL CYLINDERS MADE OF ALUMINUM ALLOY 6351–T6 Examination procedure 1 Sustained Load Cracking Condemnation Criteria 2 Eddy current examination combined with visual inspection. asabaliauskas on DSK3SPTVN1PROD with PROPOSALS Requalification requirement Eddy current—In conformance with appendix C of this part. Visual inspection—In conformance with CGA C–6.1 (IBR; see § 171.7 of this subchapter). Any crack in the neck of 2 thread lengths or more. Requalification period (years) 5 1 The requalifier performing eddy current must be familiar with the eddy current equipment and must standardize (calibrate) the system in accordance with the requirements provided in appendix C to this part. 2 The eddy current must be applied from the inside of the cylinder’s neck to detect any sustained load cracking that has expanded into the neck threads. VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 PO 00000 Frm 00043 Fmt 4701 Sfmt 4702 E:\FR\FM\26JYP2.SGM 26JYP2 49020 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules (1) Examination procedure. Each facility performing eddy current examination with visual inspection must develop, update, and maintain a written examination procedure applicable to the test equipment it uses to perform eddy current examinations. (2) Visual examinations. Visual examinations of the neck and shoulder area of the cylinder must be conducted in conformance with CGA C–6.1 (IBR, see § 171.7 of this subchapter). (3) Condemnation criteria. A cylinder must be condemned if the eddy current examination combined with visual examination reveals any crack in the neck of two thread lengths or more, or if visual inspection reveals any crack in the neck or shoulder area. ■ 48. In § 180.211, revise paragraphs (c) and (e)(1) to read as follows: § 180.211 Repair, rebuilding and reheat treatment of DOT–4 series specification cylinders. asabaliauskas on DSK3SPTVN1PROD with PROPOSALS * * * * * (c) Additional requirements for the repair or recondition of a DOT–4L cylinder. (1) Repairs to a DOT–4L welded insulated cylinder must be performed in conformance with paragraphs (a) and (b) of this section with the exception that other welding procedures permitted by CGA C–3 (IBR, see § 171.7 of this subchapter), and not excluded by the definition of ‘‘rebuild,’’ are authorized. DOT 4L cylinders must meet additional requirements for repair specified in § 180.211(c), including being pressure-tested in conformance with the specifications under which the cylinder was originally manufactured. DOT 4L cylinders that undergo procedures not defined as a repair in § 180.203 are not subject to the requirements of § 180.211(c), including the requirement to be pressure-tested in conformance with the specifications under which the cylinder was originally manufactured. (2) After repair, the cylinder must be— (i) Pressure tested in accordance with the specifications under which the cylinder was originally manufactured; (ii) Leak tested before and after assembly of the insulation jacket using a mass spectrometer detection system; and (iii) Tested for heat conductivity requirements. (3) Reconditioning of a DOT 4L welded insulated cylinder must be performed in accordance with paragraphs (a) and (b) of this section. Reconditioning applies to the work other than repair as described in paragraphs (c)(1) and (c)(2) of this section and that work is performed on VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 parts other than the inner containment vessel (cylinder). Work to recondition a DOT 4L welded insulated cylinder includes the following: (i) The removal of either end of the insulation jacket. (ii) The replacement of the neck tube. At least a 13 mm (0.51 inch) piece of the original neck tube must be protruding above the cylinder’s top end. The original weld attaching the neck tube to the cylinder must be sound, and the replacement neck tube must be welded to this remaining piece of the original neck tube. (iii) The replacement of material such as, but not limited to, the insulating material and the piping system within the insulation space with materials that are identical to those used in the original manufacture of the cylinder. (4) After reconditioning as described in paragraph (c)(3) of this section, the welded cylinder must be: (i) Pneumatically leak tested, to the closure point of all piping and gauging systems, to 90% of the service pressure or the relief valve set point, whichever is less; (ii) Leak tested before and after assembly of the insulation jacket using a mass spectrometer detection system; and (iii) Tested for heat conductivity requirements. * * * * * (e) * * * (1) The rebuilding of a DOT 4L welded insulated cylinder must be performed in conformance with paragraph (d) of this section. DOT–4 series cylinders requiring rebuild (e.g., when the inner vessel is compromised), as defined in § 180.203, must do so in conformance with § 180.211. DOT 4L cylinders which undergo procedures that are not defined as a rebuild in § 180.203 are not subject to the requirements of § 180.203(e). Rebuilding of a DOT–4L welded insulated cylinder also includes: (i) Substituting or adding material in the insulation space not identical to that used in the original manufacture of that cylinder, or (ii) Making a weld repair not to exceed 150 mm (5.9 inches) in length on the longitudinal seam of the cylinder or 300 mm (11.8 inches) in length on a circumferential weld joint of the cylinder. * * * * * ■ 49. In § 180.212, add paragraph (a)(3) to read as follows: § 180.212 Repair of seamless DOT 3-series specification cylinders and seamless UN pressure receptacles. PO 00000 (a) * * * Frm 00044 Fmt 4701 Sfmt 4702 (3) If grinding is performed on a DOT 3-series cylinder or a seamless UN pressure receptacle, the following conditions apply after grinding has been completed. Grinding must not be used to remove arc burns from a cylinder as such a cylinder must be condemned: (i) Ultrasonic examination must be conducted to ensure that the wall thickness is not less than the minimum design requirement. The wall thickness must be measured in at least 3 different areas for every 10 square inches of grinding area. (ii) The cylinder must be requalified in conformance with § 180.205 of this subpart. (iii) The cylinder must be marked in accordance with § 180.213(f)(10) of this subpart to indicate compliance with this paragraph (a)(3). * * * * * ■ 50. In § 180.213, revise paragraphs (c) and (d)(2), and add paragraphs (f)(10), (f)(11), and (g) to read as follows: § 180.213 Requalification markings. * * * * * (c) Requalification marking method. (1) The depth of requalification markings may not be greater than specified in the applicable specification. The markings must be made by stamping, engraving, scribing or other method that produces a legible, durable mark. (i) Requalification marks must begin at the top of the space provided, immediately to the right of the original manufacture date of the cylinder, as space allows. Subsequent retest dates must go immediately below the previous date, continuing down in sequential order to the bottom of the shoulder or area provided for marking. Retest marks must proceed further in columns to the right of the last column markings. (ii) Except as provided in part 178 of this subchapter, stamping on the sidewall is prohibited. (2) A cylinder used as a fire extinguisher (§ 180.209(j) of this subpart) may be marked by using a pressure sensitive label. (3) For a DOT 3HT cylinder, when stamped, the test date and RIN must be applied by low-stress steel stamps to a depth no greater than that prescribed at the time of manufacture. Stamping on the sidewall is not authorized. (4) For a composite cylinder, the requalification markings must be applied on a pressure sensitive label, securely affixed and overcoated with epoxy in a manner prescribed by the cylinder manufacturer, near the original manufacturer’s label. Stamping of the composite surface is not authorized. E:\FR\FM\26JYP2.SGM 26JYP2 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules (d) * * * (2) A cylinder subject to the requirements of § 171.23(a)(4) of this subchapter must be marked with the date and RIN in accordance with this paragraph (d) and paragraph (f)(11) of this section, or marked in accordance with the requalification authorized by the Associate Administrator in accordance with § 171.23(a)(4)(i) of this subchapter. * * * * * (f) * * * (10) For designation of grinding with ultrasonic wall thickness examination, the marking is as illustrated in paragraph (d) of this section, except the ‘‘X’’ is replaced with the letter ‘‘R’’. (11) For designation of requalification of a foreign cylinder requalified in conformance with §§ 171.23(a)(4) and 180.209(l) of this subchapter, the marking is as illustrated in paragraph (d) of this section, except that the ‘‘X’’ is replaced with the letters ‘‘EX’’. (g) Visual inspection requalification markings. Alternative to the marking requirements of paragraph (d) and (f)(5) of this section, each cylinder successfully passing a visual inspection only, in accordance with § 180.209(g) of this subpart, may be marked with the visual inspection number (e.g., V123456) issued to a person performing visual inspections. An example of the manner in which the markings may be applied is as follows: V123 03 0314 V123456 0314 E 14E 654 E V123456 V123456 0314E Where: ‘‘03’’ is the month of requalification (the additional numeral ‘‘0’’ is optional’’) ‘‘V123456’’ is the RIN ‘‘14’’ is the year of requalification; and ‘‘E’’ to indicate visual inspection 51. In § 180.215, revise paragraph (b) and (c)(2)(vii), and add (c)(3) to read as follows: ■ § 180.215 Reporting and record retention requirements. asabaliauskas on DSK3SPTVN1PROD with PROPOSALS * * * * * (b) Requalification records. Daily records of visual inspection, pressure test, eddy current examination if required, and ultrasonic examination if permitted under a special permit, as applicable, must be maintained by the person who performs the requalification until either the expiration of the requalification period or until the cylinder is again requalified, whichever occurs first. A single date may be used for each test sheet, provided each test on the sheet was conducted on that date. Ditto marks or a solid vertical line may VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 be used to indicate repetition of the preceding entry for the following entries only: date; actual dimensions; manufacturer’s name or symbol, if present; owner’s name or symbol, if present; and test operator. Blank spaces may not be used to indicate repetition of a prior entry. A symbol may be used for the actual dimensions if there is a reference chart available at the facility that lists the actual dimensions of every symbol used. The records must include the following information: (1) Calibration test records. For each test to demonstrate calibration, the date; serial number of the calibrated cylinder; calibration test pressure; total, elastic and permanent expansions; and legible identification of test operator. The test operator must be able to demonstrate that the results of the daily calibration verification correspond to the hydrostatic tests performed on that day. The daily verification of calibration(s) may be recorded on the same sheets as, and with, test records for that date, or may be recorded on a separate sheet. (2) Pressure test and visual inspection records. The date of requalification; serial number; DOT-specification or special permit number; marked pressure; actual dimensions; manufacturer’s name or symbol, if present; date of manufacture; owner’s name or symbol, if present; gas service; result of visual inspection; actual test pressure; total, elastic and permanent expansions; percent permanent expansion; disposition, with reason for any repeated test, rejection or condemnation; and legible identification of test operator. For each cylinder marked pursuant to § 173.302a(b)(5) of this subchapter, the test sheet must indicate the method by which any average or maximum wall stress was computed. Records must be kept for all completed, as well as unsuccessful tests. The entry for a repeated test must indicate the date of the earlier test, if conducted on a different day. (3) Wall stress. Calculations of average and maximum wall stress pursuant to §§ 173.302a(b)(3) and 180.209(b)(1) of this subchapter, if performed. (4) Calibration certificates. The most recent certificate of calibration must be maintained for each calibrated cylinder, pressure indicating device, and expansion indicating device. (5) Eddy current examination records. (i) Records of eddy current inspection equipment must contain the following information: (A) Equipment manufacturer, model number, and serial number. PO 00000 Frm 00045 Fmt 4701 Sfmt 4702 49021 (B) Probe description and unique identification (e.g., serial number, part number, etc.). (C) Specification of each standard reference ring used to perform the eddy current examination. (ii) Eddy current examination records must contain the following information: (A) DOT-specification or special permit number of the cylinder; manufacturer’s name or symbol; owner’s name or symbol, if present; serial number, and date of manufacture. (B) Identification of each standard reference ring used to perform the eddy current examination. (C) Name of test operator performing the eddy current examination. (D) Date of eddy current examination. (E) Acceptance/condemnation results (e.g., pass or fail). (F) Retester identification number. (c) * * * (2) * * * (vii) Results of a test on a cylinder, including test method, test pressure, total expansion, permanent expansion, elastic expansion, percent permanent expansion (permanent expansion may not exceed ten percent (10 percent) of total expansion), and volumetric capacity (volumetric capacity of a rebuilt cylinder must be within ±3 percent of the calculated capacity); * * * * * (3) A record of grinding and ultrasonic examination in conformance with § 180.212(a)(3) of this subpart must be completed for each cylinder on which grinding is performed. The record must be clear, legible, and contain the following information: (i) Name and address of the test facility, date of test report, and name or original manufacturer; (ii) Marks stamped on cylinder to include specification number, service pressure, serial number, symbol of manufacturer, and date of manufacture; (iii) Cylinder outside diameter and length in inches; (iv) Detailed map of where the grinding was performed on the cylinder; and (v) Wall thickness measurements in grind area in conformance with § 180.212(a)(3)(i). * * * * * ■ 52. In appendix C to part 180, the heading and paragraph 1 are revised to read as follows: E:\FR\FM\26JYP2.SGM 26JYP2 49022 Federal Register / Vol. 81, No. 143 / Tuesday, July 26, 2016 / Proposed Rules APPENDIX C TO PART 180—EDDY CURRENT EQUIPMENT REQUIREMENTS FOR INSPECTION OF DOT 3AL CYLINDERS MANUFACTURED OF ALUMINUM ALLOY 6351–T6 must develop, update, and maintain a written calibration procedure applicable to the test equipment it uses to perform eddy current examinations. * * * * * [FR Doc. 2016–16689 Filed 7–25–16; 8:45 am] asabaliauskas on DSK3SPTVN1PROD with PROPOSALS 1. Equipment calibration. Each facility performing an eddy current examination VerDate Sep<11>2014 22:33 Jul 25, 2016 Jkt 238001 Issued in Washington, DC on July 11, 2016, under authority delegated in 49 CFR 1.97. William Schoonover, Acting Associate Administrator for Hazardous Materials Safety, Pipeline and Hazardous Materials Safety Administration. BILLING CODE 4910–60–P PO 00000 Frm 00046 Fmt 4701 Sfmt 9990 E:\FR\FM\26JYP2.SGM 26JYP2

Agencies

[Federal Register Volume 81, Number 143 (Tuesday, July 26, 2016)]
[Proposed Rules]
[Pages 48977-49022]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2016-16689]

[[Page 48977]]

Vol. 81

Tuesday,

No. 143

July 26, 2016

Part III

Department of Transportation

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Pipeline and Hazardous Materials Safety Administration

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49 CFR Parts 107, 171, 172, et al.

Hazardous Materials: Miscellaneous Amendments Pertaining to DOT-
Specification Cylinders (RRR); Proposed Rule

Federal Register / Vol. 81 , No. 143 / Tuesday, July 26, 2016 /
Proposed Rules

[[Page 48978]]

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DEPARTMENT OF TRANSPORTATION

Pipeline and Hazardous Materials Safety Administration

49 CFR Parts 107, 171, 172, 173, 178 and 180

[Docket No. PHMSA-2011-0140 (HM-234)]
RIN 2137-AE80

Hazardous Materials: Miscellaneous Amendments Pertaining to DOT-
Specification Cylinders (RRR)

AGENCY: Pipeline and Hazardous Materials Safety Administration (PHMSA),
DOT.

ACTION: Notice of proposed rulemaking (NPRM).

-----------------------------------------------------------------------

SUMMARY: The Pipeline and Hazardous Materials Safety Administration
(PHMSA) is proposing to amend the Hazardous Materials Regulations to
revise certain requirements applicable to the manufacture, use, and
requalification of DOT-specification cylinders. PHMSA is taking this
action in response to petitions for rulemaking submitted by
stakeholders and to agency review of the compressed gas cylinders
regulations. Specifically, PHMSA is proposing to incorporate by
reference or update the references to several Compressed Gas
Association publications, amend the filling requirements for compressed
and liquefied gases, expand the use of salvage cylinders, and revise
and clarify the manufacture and requalification requirements for
cylinders.

DATES: Comments must be submitted by September 26, 2016. To the extent
possible, PHMSA will consider late-filed comments as a final rule is
developed.

ADDRESSES: You may submit comments identified by the docket number
PHMSA-2011-0140 (HM-234) by any of the following methods:
Federal eRulemaking Portal: https://www.regulations.gov.
Follow the instructions for submitting comments.
Fax: 1-202-493-2251.
Mail: Docket Management System; U.S. Department of
Transportation, West Building, Ground Floor, Room W12-140, Routing
Symbol M-30, 1200 New Jersey Avenue SE., Washington, DC 20590.
Hand Delivery: To the Docket Management System; Room W12-
140 on the ground floor of the West Building, 1200 New Jersey Avenue
SE., Washington, DC 20590, between 9 a.m. and 5 p.m., Monday through
Friday, except Federal holidays.
Instructions: All submissions must include the agency name and
docket number for this NPRM at the beginning of the comment. To avoid
duplication, please use only one of these four methods. All comments
received will be posted without change to the Federal Docket Management
System (FDMS), including any personal information.
Docket: For access to the dockets to read background documents or
comments received, go to https://www.regulations.gov or DOT's Docket
Operations Office (see ADDRESSES). To access and review the ASME
material proposed for incorporation by reference in this rulemaking,
please refer to the following Web site: https://go.asme.org/PHMSA-ASME-PRM. To access and review the CGA materials proposed for incorporation
by reference in this rulemaking, please refer to the following Web
site: https://www.cganet.com/customer/dot.aspx.
Privacy Act: Anyone is able to search the electronic form of any
written communications and comments received into any of our dockets by
the name of the individual submitting the document (or signing the
document, if submitted on behalf of an association, business, labor
union, etc.). You may review DOT's complete Privacy Act Statement in
the Federal Register published on April 11, 2000 (65 FR 19477), or you
may visit https://www.regulations.gov.

FOR FURTHER INFORMATION CONTACT: Eileen Edmonson, Standards and
Rulemaking Division, and Mark Toughiry, Mechanical Engineer,
Engineering and Research Division, Pipeline and Hazardous Materials
Safety Administration, U.S. Department of Transportation, 1200 New
Jersey Avenue SE., Washington, DC 20590, at (202) 366-8553.

SUPPLEMENTARY INFORMATION:

I. Executive Summary
II. ANPRM Background
III. Petitions for Rulemaking and Comments Received
IV. Special Permits
V. Agency Initiated Editorial Corrections
VI. Section-by-Section Review
VII. Regulatory Analyses and Notices
A. Statutory/Legal Authority for This NPRM
B. Executive Order 12866, Executive Order 13563, and DOT
Regulatory Policies and Procedures
C. Executive Order 13132
D. Executive Order 13175
E. Regulatory Flexibility Act, Executive Order 13272, and DOT
Procedures and Policies
F. Paperwork Reduction Act
G. Regulation Identifier Number (RIN)
H. Unfunded Mandates Reform Act of 1995
I. Environmental Assessment
J. Privacy Act
K. International Trade Analysis

I. Executive Summary

Cylinders filled with a Class 2 hazardous material (gas) and
offered for transportation must comply with various subparts of the
Hazardous Materials Regulations (HMR; 49 CFR parts 171-180). These
include 49 CFR part 173, subpart G, which sets forth the requirements
for preparing and packaging gases; 49 CFR part 178, subpart C, which
sets forth the specifications for cylinders (i.e., how they should be
constructed); and 49 CFR part 180, subpart C, which sets forth the
requirements for continued qualification, maintenance, and periodic
requalification of cylinders. Additionally, cylinders must meet other
requirements in the HMR, such as regulations that address the modal
effects on cylinders in transportation including general handling,
loading, unloading, and stowage.
PHMSA (also ``we'' or ``us''), in response to petitions for
rulemaking submitted by stakeholders and an agency initiated review of
the regulations, is proposing changes to the HMR, including but not
limited to the following: Incorporating by reference or updating
references to several Compressed Gas Association (CGA) publications;
amending the filling requirements for compressed and liquefied gases;
expanding the use of salvage cylinders; revising and clarifying the
manufacture and requalification requirements for cylinders; and
adopting a special permit (DOT-SP 14237). This NPRM is also presenting
minor and miscellaneous regulatory editorial corrections. Further,
PHMSA is addressing the comments received from a previous Advance
Notice of Proposed Rulemaking (ANPRM; 77 FR 31551), and proposing
additional revisions that have been requested in petitions received
since the ANPRM's 2012 publication. These proposed revisions intend to
reduce regulatory burdens while maintaining or enhancing the existing
level of safety. In this NPRM, PHMSA is responding to 20 petitions for
rulemaking submitted by stakeholders.

II. ANPRM Background

On May 29, 2012 [77 FR 31551], PHMSA published an ANPRM to obtain
public comment from those likely to be affected by the possible
incorporation of 10 petitions for rulemaking and 3 special permits into
the HMR. These include cylinder manufacturers (approximately 568
companies); cylinder requalifiers; independent

[[Page 48979]]

inspection agencies; commercial establishments that own and use DOT-
specification cylinders and UN pressure receptacles; and individuals
who export non-UN/ISO compressed gas cylinders. Incorporating these
petitions for rulemaking and special permits would update and expand
the use of currently authorized industry consensus standards; revise
the construction, marking, and testing requirements of DOT-4 series
cylinders; clarify the filling requirements for cylinders; discuss the
handling of cylinders used in fire suppression system; and revise the
requalification and condemnation requirements for cylinders.
The ANPRM comment period closed on August 27, 2012. PHMSA received
comments from 13 stakeholders, including compressed gas and/or cylinder
manufacturers, cylinder testers, and trade associations representing
the compressed gas industry or shippers of hazardous materials. Most
comments either answered questions PHMSA posed in the ANPRM or
responded to multiple petitions and/or special permits. Regarding the
petitions, the comments received were mostly supporting for all but
one--P-1515. PHMSA received four comments regarding special permits,
and all supported their adoption into the HMR. A list of the
commenters, along with the related Docket ID Number, is shown in Table
1 below:

Table 1--ANPRM Commenters and Associated Comments Docket Nos.
------------------------------------------------------------------------
Company Docket ID No.
------------------------------------------------------------------------
Air Products and Chemicals, Inc.. PHMSA-2011-0140-0004
PHMSA-2011-0140-0008
PHMSA-2011-0140-0018
Bancroft Hinchley................ PHMSA-2011-0149-0024
Barlen and Associates, Inc....... PHMSA-2011-0140-0019
City Carbonic, LLC............... PHMSA-2011-0140-0029
Compressed Gas Association....... PHMSA-2011-0140-0005
PHMSA-2011-0140-0012
PHMSA-2011-0140-0013
PHMSA-2011-0140-0020
Council on Safe Transportation of PHMSA-2011-0140-0026
Hazardous Articles, Inc.
CTC Certified Training........... PHMSA-2011-0140-0001
PHMSA-2011-0140-0023
PHMSA-2011-0140-0030
HMT Associates................... PHMSA-2011-0140-0002
PHMSA-2011-0140-0021
Hydro-Test Products, Inc......... PHMSA-2011-0140-0017
Manchester Tank.................. PHMSA-2011-0140-0016
Norris Cylinder.................. PHMSA-2011-0140-0025
SodaStream USA, Inc.............. PHMSA-2011-0140-0027
Worthington Cylinder Corporation. PHMSA-2011-0140-0028
------------------------------------------------------------------------

III. Petitions for Rulemaking and Comments Received

Table 2 lists the petitions included in the docket for this
proceeding. This NPRM addresses 20 total petitions. Ten petitions are
associated with the ANPRM, and 10 additional petitions have been
included since its publication. This table provides the petition
number, the petitioner's name, the docket number on
www.regulations.gov, a brief summary of the petitioner's requests, the
affected sections, and whether or not we are proposing to adopt the
petition:

Table 2--Petition Summary
----------------------------------------------------------------------------------------------------------------
Proposed
Petition No. Petitioner Docket No. Summary affected Proposing to
sections adopt?
----------------------------------------------------------------------------------------------------------------
P-1499........... Compressed Gas PHMSA-2007-28485........ Replace the Sec. Sec. Yes.
Association. incorporated 171.7; 172.102
by reference (SP 338);
(IBR) Seventh 173.3(d)(9);
Edition of the 173.198(a);
CGA C-6 180.205(f)(1);
Standards for 180.209(c),
Visual (b)(1)(iii),
Inspection of (d), (f), (g),
Steel (m);
Compressed Gas 180.211(d)(1)(
Cylinders with ii);
the revised 180.411(b);
Tenth Edition 180.510(c).
and update the
appropriate
references
throughout the
HMR.
P-1501........... Compressed Gas PHMSA-2007-28759........ Revise the Sec. Sec. Yes, in part.
Association. specification 178.50,
requirements 178.51,
for 4B, 4BA, 178.61, 178.68.
4BW, and 4E
cylinders to
provide
clarity.
P-1515........... Certified PHMSA-2008-0101......... Adopt changes Sec. Sec. Yes, except
Training to the 180.203, those changes
Company. requalificatio 180.205, not necessary
n process 180.207, because of IBR
designed to 180.209, of CGA C-1
clarify the 180.211, under P-1626.
regulations in 180.212,
the event CGA 180.213,
Standard C-1, 180.215,
Methods of appendix C to
Pressure part 180,
Testing appendix E to
Compressed Gas part 180.
Cylinders, is
not
incorporated.

[[Page 48980]]

P-1521........... Compressed Gas PHMSA-2008-0152......... Allow the use Sec. Yes.
Association. of labels 172.400a(a)(1)
described in (i).
CGA C-7-2004
on a cylinder
contained in
an overpack.
P-1538........... The Wicks Group, PHMSA-2009-0138......... Allow Sec. Sec. Sec. No.
representing 173.306(a)(1) 171.8,
Jetboil Inc. to permit 173.306(a)(1).
camping stove
cylinders
containing
liquefied
petroleum gas
in amounts
less than four
(4) ounces to
be shipped as
consumer
commodity (ORM-
D). Define
``capacity''
in Sec.
171.8.
P-1539........... Matheson Tri-Gas PHMSA-2009-0140......... Allow DOT 3A, Sec. No.
3AA, 3AL 180.209(a).
cylinders in
Division 2.2
Services to be
retested every
15 years.
Allow DOT 3A,
3AA, and 3AL
cylinders
packaged with
Division 2.1
materials to
be requalified
every 10
years..
P-1540........... Compressed Gas PHMSA-2009-0146......... Require newly Sec. Yes.
Association. manufactured 178.35(f).
DOT 4B, 4BA,
4BW, and 4E
cylinders to
be marked with
the mass
weight, tare
weight, and
water capacity.
P-1546........... GSI Training PHMSA-2009-0250......... Allow cylinders Sec. Yes.
Services, Inc. used as a 173.309(a).
component of a
fixed fire
suppression
system to be
transported
under the
exceptions
applicable to
fire
extinguishers.
P-1560........... Air Products and PHMSA-2010-0176......... Modify the Sec. No. Addressed
Chemicals, Inc. maximum 173.304a(a)(2). by revisions
permitted made under
filling rulemaking HM-
densities for 233F [81 FR
carbon dioxide 3635].
and nitrous
oxide to
include 70.3%,
73.2%, and
74.5% in DOT
3A, 3AA, 3AX,
3AAX, and 3T
cylinders.
P-1563........... Regulatory PHMSA-2010-0208......... Authorize an Sec. 173.301 Uncertain. We
Affairs ``overpack'' (a)(9). are asking for
Management as a strong further
Center--3M outer package comment.
Package for cylinders
Engineering, listed in the
Global section,
Dangerous Goods. except
aerosols
``2P'' and
``2Q,'' marked
with the
phrase ``inner
packagings
conform to the
prescribed
specifications
''.
P-1572........... Barlen and PHMSA-2011-0017......... Revise the Sec. Sec. Yes, in part.
Associates, filling ratio 173.301(g)(1)(
Inc. for liquefied ii) and
compressed 173.312.
gases in MEGCs
consistent
with Packing
Instruction
(P200) of the
United Nations
(UN)--Model
Regulations
(17th ed.
2011), as
specified in
Sec.
173.304b; and
prohibit
liquefied
compressed
gases in
manifolded DOT
cylinders from
exceeding the
filling
densities
specified in
Sec.
173.304a(a)(2).
P-1580........... HMT Associates.. PHMSA-2011-0123......... Require the Sec. Sec. Yes.
burst pressure 173.301(f)(4),
of the rupture 173.302(f)(2),
disc on a 173.304(f)(2).
cylinder
``shall not
exceed 80% of
the minimum
cylinder burst
pressure and
shall not be
less than 105%
of the
cylinder test
pressure''.
P-1582........... Water Systems PHMSA-2011-0135......... Revise the Sec. Yes.
Council. limited 173.306(g).
quantity
exception for
water pump
system tanks
to authorize
transport of
tanks
manufactured
to American
National
Standards
Institute's
Water Systems
Council
Standard PST-
2000-2005(2009
).

[[Page 48981]]

P-1592........... Compressed Gas PHMSA-2012-0173......... IBR CGA S-1.1, Sec. Sec. Yes.
Association. 2011 Pressure 173.301(c),
Relief Device (f) and (g),
Standards, 173.304a(e),
Part 1, 178.75(f).
Cylinder for
Compressed
Gas,
Fourteenth
Edition.
P-1596........... Chemically PHMSA-2012-0200......... Add Class 4 and Sec. Yes.
Speaking, LLC. Class 5 173.3(d)(2).
hazardous
materials to
the hazard
classes in an
authorized
salvage
cylinders.
P-1622........... Worthington PHMSA-2013-0210......... Restrict the Sec. Sec. Yes.
Cylinders internal 173.304a and
Corporation. volume of 173.304a(a)(3).
hazardous
materials
shipped in a
DOT-
specification
39 cylinder to
not exceed 75
cubic inches.
P-1626........... Compressed Gas PHMSA-2013-0265......... IBR CGA C-1- Sec. Sec. Yes.
Association. 2009, Methods 171.7, 178.36,
for Pressure 178.37,
Testing 178.38,
Compressed Gas 178.39,
Cylinders, 178.42,
Tenth Edition 178.44,
(C-1, 2009) as 178.45,
a reference in 178.46,
49 CFR, and 178.47,
provide for 178.50,
specific 178.51,
language for 178.53,
sections 178.55,
affected. 178.56,
178.57,
178.58,
178.59,
178.60,
178.61,
178.65,
178.68,
180.205,
180.209.
P-1628........... Compressed Gas PHMSA-2013-0278......... IBR CGA C-3- Sec. Sec. Yes.
Association. 2005, 171.7, 178.47,
Reaffirmed 178.50,
2011, 178.51,
Standards for 178.53,
Welding on 178.55,
Thin-Walled, 178.56,
Steel 178.57,
Cylinders, 178.58,
Seventh 178.59,
Edition. 178.60,
178.61,
178.65,
178.68,
180.211.
P-1629........... Compressed Gas PHMSA-2014-0012......... IBR CGA C-14- Sec. Sec. Yes.
Association. 2005, 171.7,
Reaffirmed 173.301,
2010, 173.323.
Procedures for
Fire Testing
of DOT
Cylinder
Pressure
Relief Device
Systems,
Fourth
Edition, as a
reference in
49 CFR.
P-1630........... Compressed Gas PHMSA-2014-0027......... Add the term Sec. Sec. Yes.
Association. ``recondition' 180.203,
' for DOT-4L 180.211(c),
welded and 180.211(e).
insulated
cylinders and
revise
language to
clarify when a
hydrostatic
test must be
performed on
the inner
containment
vessel after
the DOT-4L
welded
insulated
cylinder has
undergone
repair.
----------------------------------------------------------------------------------------------------------------

P-1499

The CGA submitted P-1499 requesting that PHMSA replace the
currently incorporated by reference C-6 Standards for Visual Inspection
of Steel Compressed Gas Cylinders, Seventh Edition with the revised
Tenth Edition and update the appropriate references throughout the HMR.
The Tenth Edition provides enhanced guidance for cylinder
requalifiers--including guidance on the inspection of Multiple-Element
Gas Containers (MEGCs) and the requirements for thread inspection for
cylinders used in corrosive gas service--and clarifies maximum
allowable depths and measuring techniques for various types of
corrosion.
PHMSA identified approximately 5,000 companies that would be
subject to this standard, with the majority being classified as small
businesses using the Small Business Administration (SBA) size standards
(<500 employees). This revision would impose a one-time cost of between
$78 and $142 per document depending on the document format (electronic
or hard copy) and the purchaser's CGA membership.
Air Products and Chemicals, City Carbonic, CGA, Hydro-Test
Products, and Worthington Cylinders support the proposal as discussed
in the May 29, 2012 ANPRM. No commenters objected to the proposal.
PHMSA agrees that the Tenth Edition provides improved and updated
guidance on inspecting MEGCs. While there were no comments opposed to
the incorporation, subsequent to the submission of this petition, a
more current updated version of CGA C-6 has been made available (i.e.,
an eleventh edition). Therefore, in this NPRM, PHMSA is proposing to
update the IBR of CGA C-6 to the 2013 Eleventh Edition. We invite
comment on this course of action.

P-1501

The CGA submitted P-1501 requesting that PHMSA revise the
manufacturing requirements for DOT 4B, 4BA, 4BW, and 4E cylinders.
According to the petition, the current DOT-4 series welded cylinder
manufacturing requirements are unclear in some respects and result in
varied interpretation by manufacturers and enforcement personnel. The
CGA states that although the proposed changes do not present a
significant economic impact to any single manufacturer or user, they
will enhance regulatory clarity, promote consistent manufacturing
practices, and create greater uniformity between the specifications for
DOT-4 series cylinders and the requirements for welded cylinders found
in International Organization for Standardization (ISO) Standard 4706-
1, Gas cylinders--Refillable welded steel cylinders--Part 1: Test
pressure 60 bar and below, which is referenced in the UN Model
Regulations.

[[Page 48982]]

Summary of the changes proposed by P-1501 and the comments received
are detailed below:
(1) Revise the requirements for DOT-specification 4B, 4BA, 4BW, and
4E cylinders in Sec. Sec. 178.50(b), 178.51(b), 178.61(b), and
178.68(b), respectively, to ensure material compositions and the heat
treatment are within the specified tolerances and are of uniform
quality as follows: (1) Require a record of intentionally-added
alloying elements, and (2) require materials manufactured outside of
the United States to have a ladle analysis confirmed by a check
analysis.
Norris Cylinder sought clarification on the requirement to report
intentionally added alloying elements. Specifically, Norris Cylinder
inquired if PHMSA would require the manufacturer to maintain documents
other than the mill certificate and the DOT Test Report.
PHMSA has decided that the proposed revisions to Sec. Sec.
178.50(b), 178.51(b), 178.61(b), and 178.68(b) with respect to proposed
measure (2) above is not necessary based on the required duties of
inspectors in Sec. 178.35(c)(2) to verify the material of construction
meets the requirements of the applicable specification by (1) making a
chemical analysis of each heat of material; (2) obtaining a certified
chemical analysis from the material manufacturer for each heat of
material (a ladle analysis is acceptable); or (3) if an analysis is not
provided for each heat of material by the material manufacturer, by
making a check analysis of a sample from each coil, sheet, or tube.
However, we do believe a record of intentionally added alloying
elements will be useful for ensuring material compositions are within
the specified tolerances. As pointed out by Norris cylinder, the
regulatory text proposed by CGA does not specify who must maintain the
document. In this NPRM, we specify that the cylinder manufacturer must
maintain the record of intentionally added alloying elements. Further,
we are not proposing to require a check analysis to confirm the ladle
analysis for materials manufactured outside of the United States
because we believe this is already addressed by requiring domestic
performance of required check analyses under Sec. 178.35(b) of the
HMR. We invite comment on this course of action.
(2) Revise the pressure tests for DOT-specification 4B, 4BA, 4BW,
and 4E cylinders in Sec. Sec. 178.50(i), 178.51(i), 178.61(i), and
178.68(h), respectively, to permit use of the volumetric expansion
test, a hydrostatic proof pressure test or a pneumatic proof pressure
test.
Hydro-Test Products and Manchester Tank expressed concern that
PHMSA would allow a pneumatic pressure test. Because the potential
release of energy in the event of a cylinder rupture during a pneumatic
test is much greater than that released if a cylinder ruptured during a
hydrostatic test, the commenters state that the person conducting the
test must take additional precautions to safeguard against injury, such
as erecting a safety barrier to protect personnel. Worthington
Cylinders noted that it had extensive experience conducting proof
pressure tests with gas but further stated that each company's safety
considerations of the testing equipment will be different.
Given the added risk associated with pneumatic testing and the fact
that there are suitable alternatives to determine the leakproofness of
a cylinder at the time of manufacture, PHMSA is not proposing to permit
the use of pneumatic proof pressure testing in this NPRM.
(3) Revise the physical and flattening tests and retest criteria
for DOT-specification 4B, 4BA, 4BW, and 4E cylinders in Sec. Sec.
178.50, 178.51, 178.61, and 178.68, respectively, for consistency.
These revisions would clarify the location on the cylinder from which
the test specimens are removed.
Manchester Tank requested that the specific proposed wording, or
more detailed information, be made available for comment. Readers may
review the specific changes to these sections at the end of this
document.
(4) Revise Sec. Sec. 178.50(n), 178.51(n), and 178.61(o), and
178.68, respectively, for DOT-specification 4B, 4BA, 4BW, and 4E
cylinders to permit marking on the footring for cylinders with water
capacities up to 30 pounds, instead of 25 pounds.
Manchester Tank and Worthington Cylinders support the CGA proposal
that would allow markings to be applied to the footring on cylinders up
to 30-pounds water capacity, instead of the current capacity limit of
25 pounds. The commenters state that this revision would not impose any
cost and would expand upon existing options. In this NPRM, PHMSA is
proposing this revision as stated in the petition.
(5) Add requirements for the location of markings on DOT 4E
cylinders in Sec. 178.68.
Manchester Tank and Worthington Cylinders support the proposed
modification to permit marking of the valve protection collar of DOT 4E
cylinders. In this NPRM, PHMSA is proposing the revision as stated in
the petition.

P-1515

The Certified Training Company (CTC) submitted P-1515 requesting
that PHMSA make numerous revisions to the requirements for the
requalification of DOT-specification cylinders found in 49 CFR part
180, subpart C. These requirements include definitions for terms used
in the subpart, references to CGA publications for the visual
inspection of cylinders, and requirements for hydrostatically testing
cylinders including methods to ensure the accuracy of test equipment.
The CTC states that the current requirements create confusion for
requalifiers and enforcement officials. In the ANPRM, PHMSA requested
comments on two possible methods of responding to this petition. The
first, as was suggested by CTC in P-1515, was to modify the specific
HMR provisions in Sec. Sec. 180.203 through 180.215 for
requalification of cylinders. The second was to IBR into Sec. 180.205
CGA C-1, Methods for Pressure Testing Compressed Gas Cylinders, Tenth
Edition (2009), which contains most of the provisions and additions
specified in P-1515, including revisions to definitions in Sec.
180.203, appropriate procedures for conducting the hydraulic pressure
tests, and marking and recordkeeping requirements.
PHMSA identified 980 entities that conduct hydrostatic retesting.
Incorporation of CGA C-1 would impose a one-time cost of between $102
and $186 per document depending on the document format (electronic or
hard copy) and the purchaser's CGA membership.
We received eight comments on this petition. Air Products and
Chemicals, CGA, Bancroft Hinchley, and Worthington Cylinders support
adoption of the CGA C-1 standard. Conversely, Hydro-Test Products
stated that the proposals in P-1515 and the CGA C-1 impose stricter
requirements on accuracy, pressure drop, and verification, therefore
imposing an unnecessary burden on the industry. SodaStream requested
PHMSA modify the appropriate sections of 49 CFR part 180, subpart C,
instead, as adoption of CGA C-1 would limit their ability to conduct
volumetric expansion tests and would result in a need to obtain a
special permit.
As indicated by Worthington Cylinders, several commenters stated
similar concerns to those shared regarding the option to IBR CGA C-1,
with Worthington Cylinders further stating that CGA C-1 ``represents
the best testing practices for the industry.'' Moreover, as indicated
by CGA, the

[[Page 48983]]

changes proposed in P-1515 would not resolve the confusion of
requalifiers and enforcement officials that the petition seeks to
address. For these reasons, in this NPRM, PHMSA is proposing to IBR CGA
C-1, Methods for Pressure Testing Compressed Gas Cylinders, at Sec.
171.7 and into Sec. 180.205 and numerous other sections (see
discussion of Petition P-1626). However, subsequent to the submission
of this petition, an eleventh edition of CGA C-1 has been made
available. Therefore, in this NPRM, PHMSA is proposing to update the
IBR of CGA C-1 to the 2016 Eleventh Edition. We invite comment on this
course of action.
The CTC further requests that PHMSA correct and reissue two letters
of interpretation (Reference Nos. 00-0309 and 05-0087), as well as
provide formal interpretation on six additional issues identified in
its petition. PHMSA invites public comment on the questions,
recommendations, and proposed responses detailed below:
(1) Existing Clarification Letter Reference No. 00-0309
On March 15, 2001, PHMSA responded to an inquiry from Vallen
Technical Services (VTS) pertaining to the pressure retest of DOT-
specification cylinders (Reference No. 00-0309). Citing that former
Sec. 173.34(e)(4)(v)--currently Sec. 180.205(g)(5)--states, ``In the
case of a malfunction of the test equipment, the test may be repeated
at a pressure increased by 10 percent or 100 [pounds per square inch]
psi, whichever is less,'' VTS stated its understanding that only one
repeat test is permitted. PHMSA responded with the following: ``Your
understanding of this requirement is correct. Section 173.34(e)(4)(v)
permits only one repeat test in the case of a malfunction of the test
equipment. With regards to your reference to the Compressed Gas
Association (CGA) pamphlet C-1, currently the HMR do not incorporate
the pamphlet by reference. However, we proposed in a notice of proposed
rulemaking to reference certain pressure test procedures contained in
the CGA pamphlet. (Docket No. HM-98-3684 (HM-220); October 30, 1998).''
The CTC states that Sec. 180.205(g)(5) ``permits only one repeated
test'' and further posits that this letter's response directly
contradicts language PHMSA previously issued in a final rule [Docket
No. HM-220A (61 FR 26750); February 28, 1996)] that states: ``A
commenter specifically asks how many repeated tests are allowed before
condemning the cylinder, and the response is that the cylinder is to be
condemned when it exceeds its permanent expansion limit. It even
specifies, `. . . Thus when this limit [Perm. Expan.] is exceeded . .
.' [i.e., no limit to the number of repeats is given, even when the
specific question was asked.]''
Although the CTC states it favors limiting the number of repeat
tests of this type, it believes PHMSA's statement on this matter in
Reference No. 00-0309 ``constitutes a rulechange, not an
interpretation.'' The CTC believes requiring only one repeat test ``may
be overly restrictive in some cases, such as small aircraft cylinders,
and certain composite cylinders,'' and suggests allowing two repeated
tests, as permitted in special permits DOT-SPs 10915, 10945, and 11194,
would be ``more in line with current industry procedure.''
On August 8, 2002, PHMSA's predecessor agency, the Research and
Special Programs Administration, issued a final rule under Docket No.
HM-220D that consolidated the requirements for qualification, use, and
maintenance of cylinders in 49 CFR part 180, subpart C. As a result,
the regulatory sections referred to in Reference No. 00-0309 are no
longer correct. Further, not all the requirements previously codified
in Sec. 173.34 have parallel requirements in 49 CFR [art 180, subpart
C. See Sec. 180.205(g)(5) for additional information. However, PHMSA
agrees with the CTC that the language in Reference No. 00-0309 may be
misleading and believes the IBR of CGA C-1 into Sec. 180.205 will
resolve any issue the CTC may have with this letter of interpretation.
We invite comment on this conclusion. PHMSA also plans to retract
Reference No. 00-0309.

(2) Existing Clarification Letter Reference No. 05-0087

On May 10, 2005, PHMSA responded to an inquiry from G&C Kinney,
Inc., concerning calibration verification of equipment used for
volumetric expansion tests for DOT-specification cylinders (Reference
No. 05-0087). The company asked whether the maximum pressure at which
the verification test is being conducted (for example, 3,000 pounds)
must be maintained at the final pressure for 30 seconds or whether the
pressure may be allowed to drop between 2 psi and 10 psi. PHMSA
responded by stating, ``Overall, for any pressure test (calibration or
production retest), the 30-second hold time begins only when the
cylinder has completed its expansion. If the cylinder pressure drops by
any measurable amount (such as 2 psi) during the recorded 30-second
hold time, the hold time must be restarted, or the test would be
considered invalid.''
The CTC requests that PHMSA retract its Reference No. 05-0087
response because it contradicts regulatory text found in Sec.
180.205(g)(2), (g)(3)(i), and (g)(5); DOT-SPs 10915 and 10945;
standards in CGA C-1, Seventh Edition (1996); and some manuals of
manufacturers of hydrostatic test equipment. Specifically, the CTC
states the following:

Paragraph 180.205(g)(5) states, ``Minimum test pressure must be
maintained for at least 30 seconds, and as long as necessary for
complete expansion of the cylinder.'' [Emphasis added.] This
statement tells us that the cylinder may be expanding during the 30
second hold time, and if the cylinder is still expanding at the end
of the 30 seconds, we must hold even longer than the minimum 30
seconds. As the cylinder expands, its volume increases, and pressure
will drop. Therefore, the statement ``as long as necessary for
complete expansion of the cylinder'' is equivalent to saying ``until
the pressure ceases to drop''. The regulations state that this may
occur during the 30 second hold time; the regulations do not specify
the hold time begins after the cylinder has completed its expansion.
Therefore, this ``interpretation'' directly contradicts Sec.
180.205(g)(5), and constitutes a rule change.
Paragraph 180.205(g)(2) states, ``[t]he pressure indicating
device of the testing apparatus must permit reading of pressures to
within 1% of the minimum prescribed test pressure of each cylinder
tested.'' Paragraph 180.205(g)(3)(i) states, ``[t]he pressure-
indicating device, as part of the retest apparatus, is accurate
within 1.0% of the prescribed test pressure of any
cylinder tested that day.'' This interpretation attempts to declare
a test invalid due to a 2 psi drop in pressure at 3000 psi. The
pressure indicating device has already been defined as having a 1%
resolution and 1% accuracy. According to the definition
of the device, it can deviate by 30 psi at 3000 psi (30
psi = 1% of 3000 psi). This interpretation violates the definition
of the device as stated in these two paragraphs.
Furthermore, many special permits, such as DOT-SP 10915 and
10945, recognize that different materials (such as the carbon-fiber
wrapped, aluminum lined cylinders referenced in these special
permits) take even longer than 30 seconds to completely deform under
the load of test pressure, and therefore require a hold time of 60
seconds. According to this interpretation, these special permits
would require a hold time of 60 seconds (or longer), until the
cylinder completed its expansion, and then an additional 60 seconds
of hold time, wherein the pressure could not drop by even 2 psi.
This, obviously, is not the intention of these special permits when
they state, ``. . . for a minimum test time of one minute.''
Industry standard CGA C-1, Seventh Edition 1996, ``Methods for
Hydrostatic Testing of Compressed Gas Cylinders,'' in paragraph
4.4(g) states, ``[w]hen the desired

[[Page 48984]]

value is reached, stop the pressurization and hold for 30 seconds.''
And, ``[t]he expansion and pressure should remain stable during the
entire 30 seconds. If either the pressure or expansion do not
stabilize within 1%, see 4.5 [Troubleshooting].'' Thus,
the 30-second hold begins when the pump stops, and deviation during
the hold time is allowed up to the defined accuracy of the device,
that is, 1% of the test pressure, and 1% of
the total expansion.
Manufacturers of hydrostatic test equipment specify in their
manuals and the software controlling automated equipment that the
30-second hold time begins when the test pressure is reached and the
pump is turned off.

The CTC further states: ``This interpretation declares virtually
every test performed on cylinders in the past century to be invalid,
since every cylinder tested (as well as the hoses on the machine) will
continue to expand after the pump is stopped. Therefore the pressure
will drop. The only issue is whether or not the device is capable of
detecting such a minute drop in pressure.'' The CTC believes this
interpretation is based on two misunderstandings:
1. Closed loop hydraulics vs. open system. In a closed loop
hydraulic system (such as the controls on an aircraft), any drop in
pressure is unacceptable. This does not apply to an open system where
the pressure will drop (e.g., a cylinder expanding during a test).
2. Higher precision digital devices vs. analog devices. There has
always been a slight drop in pressure during the hold time. On an
analog device, it was not visible. It is now visible on a digital
device, but that does not simply invalidate the test.
PHMSA agrees with the CTC that the language in Reference No. 05-
0087 is misleading and believes the IBR of CGA C-1 into Sec. 180.205,
in conjunction with additional changes to the regulations proposed
consistent with petition P-1626, will resolve any issue the CTC may
have with this letter of interpretation. We invite comment on this
conclusion. PHMSA also plans to retract Reference No. 05-0087.

P-1521

The CGA submitted P-1521 requesting that PHMSA modify the provision
in Sec. 172.400a(a)(1)(i) to remove the limitation that only allows
the use of the neckring markings if a cylinder is not overpacked. The
petition would still require the overpack to display the labels in
conformance with 49 CFR part 172, subpart E.
The HMR permit the use of a neckring marking, under certain
conditions, in conformance with the CGA C-7, Guide to Preparation of
Precautionary Labeling and Marking of Compressed Gas Containers,
Appendix A, Eighth Edition (2004) under Sec. 172.400a. This neckring
marking identifies the contents of a cylinder by displaying the proper
shipping name, the UN identification number, and the hazard class or
division label within a single marking. Section 172.400a(a)(1) permits
the use of this marking in lieu of required labels on a Dewar flask
meeting the requirements in Sec. 173.320 or a cylinder containing
Division 2.1, 2.2, and 2.3 material that is not overpacked. This
requirement should provide flexibility in hazard communication for
cylinders, especially small cylinders.
The marking prescribed in appendix A to CGA C-7 provides useful
information in a clear and consistent manner, and its widespread use on
cylinders has enhanced its recognition. CGA's proposed change would
provide greater flexibility for shipments of overpacked cylinders while
ensuring adequate hazard communication. If cylinders are contained in
an overpack, the overpack must display the appropriate markings and
labels.
PHMSA identified approximately 86 entities engaged in Industrial
Gas Manufacturing, of which 74 are classed as small entities (<500
employees). Other potentially impacted entities include wholesalers of
medical equipment, service establishment equipment and supplies, and
other miscellaneous durable goods. In the ANPRM, PHMSA asked for
comments on the potential implications of this change, specifically
regarding its necessity and the potential safety and economic impacts.
PHMSA also sought data concerning the breadth of shipments to be
impacted by the proposal. PHMSA received no responses to these
questions from commenters to the ANPRM.
Both Air Products and Chemicals and Worthington Cylinders support
CGA's petition to revise Sec. 172.400a(a)(1)(i). Therefore, in this
NPRM, PHMSA is proposing to revise Sec. 172.400a(a)(1)(i) to remove
the limitation that would only allow the use of the neckring markings
if the cylinders are not overpacked, as proposed in P-1521. The
petition would still require the overpack to display the required
labels in conformance with 49 CFR part 172, subpart E.

P-1538

On behalf of Jetboil, Inc., The Wicks Group submitted P-1538
requesting that PHMSA revise Sec. 173.306(a)(1) to permit camping
stove cylinders containing liquefied petroleum gas (LPG) in amounts
less than 4 ounces but in a container exceeding 4 fluid ounce capacity
to be shipped as consumer commodity (ORM-D). Section 173.306 prescribes
requirements for transporting compressed gases as a limited quantity
and a consumer commodity. Paragraph (a)(1) of Sec. 173.306 requires a
container of only compressed gas to be limited to a capacity of 4 fluid
ounces or less except cigarette lighters, which are required to meet
rigorous performance design standards and packaging requirements
prescribed in Sec. 173.308. The Wicks Group states if more than 4
fluid ounces of the liquefied portion of the gas were enclosed in the
cylinder, ``there would be insufficient space remaining for the gaseous
portion of the liquefied gas, as required by [Sec. Sec. 173.304(b) and
173.304a(d)(1)]. In other words, [Sec. Sec. 173.304(b) and
173.304a(d)(1)] together limit the percentage of space [emphasis added]
that the liquefied portion of a liquefied gas may take up in a
cylinder. Thus, since the canisters at issue here could not safely or
legally hold more than four (4) fluid ounces of LPG while complying
with the HMR filling limits and filling density requirements, they can
reasonably be said to have a capacity of four (4) fluid ounces.'' The
petitioner included a certificate from the manufacturer of the
``Jetpower'' 100G canister of cooking fuel, Taeyang Ind., Co., LTD, of
Seoul, Korea, certifying ``that the capacity of the 100G canister is
less than 4 oz. because the capacity of the canister should be measured
by the amount of liquefied gas contents in a fluid condition that it
can hold, still leaving room for the portion in a gas condition. The
100G canisters must have less than 4 oz. of liquefied gas to meet that
requirement. The capacity of the 100G canisters `Jetpower' should be
considered less than 4 ounces. These canisters are safe for
transportation as ORM-D.\1\ We are unaware of any problems occurring
with these canisters in transportation.'' PHMSA seeks public comment on
the safety issues associated with this proposal, especially those
regarding the safe performance of containers of this type in
transportation.
---------------------------------------------------------------------------

\1\ Note that the ORM-D class will be completely phased out for
all modes of transportation by December 31, 2020.
---------------------------------------------------------------------------

The Wicks Group further states on behalf of Jetboil, Inc., that ``.
. . 49 CFR 173.306(a)(1) is ambiguous as currently drafted. In brief,
the HMR do not define the term capacity, but do define the term
`maximum capacity,' at 49 CFR 171.8, as meaning `the maximum inner
volume of receptacles or packagings.' If PHMSA interprets `capacity' as
meaning the total volume of the container, then

[[Page 48985]]

the word `maximum' would be rendered meaningless. This violates the
long-established rule of statutory and regulatory interpretation that
courts must give effect to every clause and word of a legal text
whenever possible. Indeed, the omission of a word in one section of a
text can be telling where that word issued in another section of the
same act or regulation.'' In addition, the petitioner states providing
industry an opportunity to comment on this issue in a rulemaking will
give them the chance ``to explain why these containers present a
reduced safety risk, and to demonstrate that there have been no
transportation safety incidents involving these containers.''
PHMSA has limited the amount of compressed gas in limited quantity
packagings to reduce the opportunity and speed of the gaseous product's
reaction to an activating event, having found that including non-
gaseous materials in the same container with the gas--such as
foodstuffs, soap, etc.--slowed this reaction. The petitioner requested
that PHMSA define the word ``capacity'' in the HMR to add meaning to
the maximum capacity definition in Sec. 171.8. The Interstate Commerce
Commission first adopted the provision for Sec. 173.306(a)(1)
(previously Sec. 73.306(a)(1)) in a final rule published July 1, 1966
(31 FR 9067). The provision provided an ``exemption'' (i.e., an
exception) from regulations for shipping of compressed gases ``when in
containers of not more than 4 fluid ounce water capacity.'' Thus,
historically, the provision applies to the capacity of the container
and not to the quantity of its contents. This is consistent with design
requirements for the capacity of packagings found in part 178 that
includes a specification for the water capacity of the packaging (e.g.,
Specification 3A and 3AX seamless steel cylinders in Sec. 178.36);
however, the publication of a final rule on April 15, 1976 (41 FR
15972) inadvertently dropped the term ``water'' from paragraph (a)(1)
regardless of there having been no express discussion of the intent to
do so or to change the size standard from the originally adopted water
capacity to the quantity of the contents.
Furthermore, the definition ``maximum capacity'' was introduced as
part of a harmonization effort with international regulations and
standards in a final rule published December 21, 1990 (55 FR 52402) for
consistency with use of terminology internationally for UN performance
oriented packaging. See the part 178, subpart L non-bulk performance
oriented packaging sections. Therefore, based on the historical context
of capacity as its use in Sec. 173.306(a)(1) to mean water capacity
and the adoption of the term ``maximum capacity'' in association with
the adoption of UN performance-oriented packaging, we are not proposing
to amend Sec. 173.306(a)(1) to accommodate this petition for
rulemaking.

P-1539

Matheson-TriGas submitted P-1539 requesting that PHMSA revise Sec.
180.209, which prescribes requirements for requalifying cylinders.
Paragraph (a) of Sec. 180.209 requires each DOT-specification cylinder
listed in ``table 1 of this paragraph'' to be requalified and marked in
conformance with requirements specified in Sec. 180.209. The
petitioner requests that PHMSA extend the 10-year retest period
prescribed in this table for DOT 3A, 3AA, and 3AL specification
cylinders in Division 2.2 (non-flammable) gas service to once every 15
years. Matheson-TriGas also requests in its petition that PHMSA extend
the 5-year retest period prescribed in this table for DOT 3A, 3AA, and
3AL specification cylinders in Division 2.1 (flammable) gas service to
once every 10 years. The petitioner states: ``Historically over 99.4%
of cylinders in the above[-mentioned] services that were [subjected] to
the water jacket test pass the test,'' and ``it is more likely . . .
the cylinder failed the external or internal visual [test] rather than
failing the water jacket test.''
Matheson-TriGas notes PHMSA's statement from an earlier rulemaking
regarding the history of the plus rating for steel cylinders resulting
from the steel shortage of World War II, which resulted in changes
``that benefitted the industry with no compromise of public safety down
to this day.'' Matheson-TriGas extrapolates that we face similar metal
shortage challenges in today's economy.
Upon further consideration of this petition based on our concern of
increasing the risk of cylinder failure by lengthening the timeframe
between periodic qualifications, PHMSA is electing not to propose to
revise the 10-year requalification period for DOT 3A, 3AA, and 3AL
specification cylinders in Division 2.2 (non-flammable) gas service to
once every 15 years, nor to revise the 5-year requalification period
for DOT 3A, 3AA, and 3AL specification cylinders in Division 2.1
(flammable) gas service to once every 10 years. We invite comment on
this decision and request detailed information in support or opposition
to this decision.

P-1540

The CGA submitted P-1540 requesting that PHMSA require newly
manufactured DOT 4B, 4BA, 4BW, and 4E cylinders to be marked with the
mass weight, tare weight, and water capacity. As specified in Sec.
178.35(f), the HMR require DOT-specification cylinders to be
permanently marked with specific information including the DOT-
specification, the service pressure, a serial number, an inspector's
mark, and the date manufacturing tests were completed. These marks
provide vital information to fillers and uniquely identify the
cylinder.
Certain DOT 4-series specification cylinders contain liquefied
gases filled by weight, so the tare weight (i.e., the weight of the
empty cylinder and appurtenances) or the mass weight (i.e., the weight
of the empty cylinder), and the water capacity must be known by the
filler to properly fill the cylinder. This information is essential for
cylinders filled by weight, as cylinders overfilled with a liquefied
gas can become liquid full as the ambient temperature increases. If
temperatures continue to rise, pressure in the overfilled cylinder will
rise disproportionately, potentially leading to leakage or a violent
rupture of the cylinder after only a small rise in temperature. Despite
these risks, the HMR do not require tare weight, mass weight, or water
capacity markings on DOT-specification cylinders.
To address this, the CGA petitioned PHMSA to require tare weight or
mass weight, and water capacity to be marked on newly constructed DOT
4B, 4BA, 4BW, and 4E specification cylinders. The petition also
requests that PHMSA provide guidance on the accuracy of these markings
and define the party responsible for applying them. In its petition,
CGA notes that PHMSA IBRs the National Fire Protection Association's
58-Liquefied Petroleum Gas Code (NFPA 58), which requires cylinders
used for liquefied petroleum gases to be marked with the tare weight
and water capacity; \2\ however, as stated in the petition, NFPA 58
gives no guidance as to the accuracy of these markings or the party
required to provide them. The CGA states that this lack of guidance can
lead to the overfilling of a cylinder and the potential for unsafe
conditions.
---------------------------------------------------------------------------

\2\ Note that IBR of NFPA 58 is not for marking purposes but for
purposes of equipping storage tanks containing LPG or propane with
safety devices. See Sec. 173.315(j).
---------------------------------------------------------------------------

While DOT 4B, 4BA, 4BW, and 4E cylinders are often used to
transport liquefied compressed gas, we noted in

[[Page 48986]]

the ANPRM that these are not the only cylinder types used for liquefied
compressed gas transport. For that reason, in the ANPRM, PHMSA asked
for comment regarding the potential revision of Sec. 178.35 to require
all DOT-specification cylinders suitable for the transport of liquefied
gases to be marked with the cylinder's tare weight or water capacity.
PHMSA understands that many in the compressed gas industry, especially
the liquefied petroleum gas industry, already request manufacturers
mark cylinders with this additional information as an added safety
measure. Based on this assumption, PHMSA estimates the impact on the
liquefied compressed gas industry will be minimal as many in the
industry are already voluntarily applying these markings. In the ANPRM,
we requested comment on this assertion.
PHMSA identified six U.S. based manufacturers of the cylinders
identified in the petition, of which five are classified as small
businesses using SBA size standards (< 500 employees). PHMSA requested
comments and supporting data regarding the increased safety benefits
and the economic impact of this proposal. With regards to the cost
associated with this modification, in the ANPRM, PHMSA asked the
following specific questions:
What is the average total cost per cylinder to complete
these markings (i.e., is an estimated cost of $0.10 per character for
new markings accurate)?
What is the estimated quantity of newly manufactured 4B,
4BA, 4BW and 4E cylinders each year? Furthermore, how many of these
cylinders already display tare weight and water capacity markings in
compliance with NFPA 58 or other codes?
How many manufacturers of the cylinders mentioned above
are considered small businesses by the SBA?
PHMSA sought to identify: (1) The frequency of which the mass
weight or tare weight, and water capacity markings are already
permissively applied to cylinders, (2) the costs associated with
applying these marks, (3) the safety benefits associated with the
additional markings, and (4) the alternate methods or safeguards
against overfilling of cylinders currently being implemented.
Air Products and Chemicals supports the petition with no additional
comments. The CGA supports the inclusions of tare weight, mass weight,
and water capacity requirements on newly constructed DOT 4B, 4BA, 4BW,
and 4E specification cylinders at the time of manufacture but does not
support--and strongly disagrees with--PHMSA's consideration of
modifying Sec. 178.35 to require all DOT-specification cylinders
suitable for the transport of liquefied gases to be marked with the
cylinder's tare weight and water capacity. The CGA also believes that
the 49 CFR must further clarify that no cylinder must be filled with a
liquefied gas unless a mass or tare weight is marked on the cylinder,
providing the following justification:
At the time of manufacture, the manufacturer would not
know whether the DOT 3 series cylinders are or are not be used in a
liquefied gas service;
Marking all cylinders, as suggested by DOT, would include
every cylinder manufactured in conformance with the specifications set
forth in the HMR, which would therefore require cylinders that have
been designed and manufactured for a specific permanent gas application
be marked for tare weight and water capacity just because the cylinder
could be used (at some time) for liquefiable gas;
There would be instances on small 3-series cylinders where
the additional marking would not fit onto the dome of the cylinder; and
The economic impact estimated for marking all cylinders is
significantly greater than the estimates submitted by PHMSA.
Manchester Tank expresses concern that numerous variations in
stamped weights could cause confusion in the field among fillers. They
state that adding mass weight stamping to a cylinder that already has
tare weight stamped could lead to incorrect filling if the wrong figure
is used. They ask PHMSA for specific clarification of the language to
assign the duty to mark tare weight to the valve installer and indicate
that there are many cylinders that are not valved by the manufacturer,
further declared that those cylinders can be marked correctly with mass
weight--but not with tare weight, since the weight of the appurtenance
may not be known to the manufacturer of the vessel. In addition,
Manchester Tank notes that available space for stamping is limited on
some vessels and increased stamping will not allow significant space
for retest marking information.
In this NPRM, PHMSA is proposing to revise Sec. 178.35(f) to
require that tare weight or mass weight, and water capacity be marked
on certain DOT 4-series specification cylinders used for the transport
of liquefied gases as petitioned by the CGA. We stress that while
cylinder markings are important to ensure the safe filling of liquefied
compressed gas, they do not take the place of adequate personnel
training, procedures to ensure proper filling, and continued
requalification and maintenance of cylinders in preventing incidents.
PHMSA seeks additional comment on expanding this marking requirement to
other DOT-specification cylinders and the costs and benefits as well as
the safety implications of doing so.

P-1546

GSI Training Services submitted P-1546 requesting that PHMSA allow
cylinders that form a component of fire suppression systems to use the
proper shipping name ``Fire extinguishers'' when offered for
transportation. The Hazardous Materials Table (HMT) in Sec. 172.101
provides a shipping description for cylinders used as fire
extinguishers (i.e., ``UN1044, Fire extinguishers, 2.2'') and
references Sec. 173.309 for exceptions and non-bulk packaging
requirements. Fire extinguishers charged with a limited quantity of
compressed gas are excepted from labeling, placarding, and shipping
paper requirements under certain conditions if the cylinder is packaged
and offered for transportation in conformance with Sec. 173.309.\3\
Additionally, fire extinguishers filled in conformance with the
requirements of Sec. 173.309 may use non-specification cylinders
(i.e., cylinders not manufactured to specifications in part 178). Part
180 also provides special requirements for cylinders used as fire
extinguishers (e.g., Sec. 180.209(j) includes different
requalification intervals).
---------------------------------------------------------------------------

\3\ Note that the format of Sec. 173.309 was changed under a
final rule published January 7, 2013 (HM-215K; 78 FR 1101) such that
the exceptions for limited quantities has been relocated to
paragraph (d) of Sec. 173.309.
---------------------------------------------------------------------------

PHMSA has written several letters of clarification regarding the
applicability of Sec. 173.309 to fire extinguishers. Notably on March
9, 2005, PHMSA wrote a letter (Reference No. 04-0202) to Safecraft
Safety Equipment regarding non-specification stainless steel cylinders
used as a component in a fire suppression system for installation in
vehicles and stated that the cylinders used in the fire suppression
system appeared to meet the requirements of Sec. 173.309. PHMSA issued
another letter (Reference No. 06-0101) on May 30, 2008, to Buckeye Fire
Equipment stating that the company could not use the shipping name
``Fire extinguishers'' for their cylinders, which served as a component
of a kitchen fire suppression system, and must use the proper shipping
name that best describes the material contained in the cylinder since
these cylinders were not equipped to function as fire extinguishers.
This latter clarification effectively required

[[Page 48987]]

cylinders that are part of a fixed fire suppression system to meet an
appropriate DOT-specification.
In response to Reference No. 06-0101, GSI Training Services
submitted a petition for rulemaking requesting PHMSA to allow cylinders
that form a component of fire suppression systems to use the proper
shipping name ``Fire extinguishers'' when offered for transportation,
stating that: (1) At least one company manufactured over 39,000 non-
specification cylinders for use in fire suppression systems based on
the information provided in the March 9, 2005 letter; and (2) the May
30, 2008 clarification effectively placed this company out of
compliance. GSI Training Services further suggests that cylinders
comprising a component of a fixed fire suppression system will provide
an equal or greater level of safety than portable fire extinguishers
since cylinders in fire suppression systems are typically installed in
buildings where they are protected from damage and not handled on a
regular basis.
In this NPRM, PHMSA is proposing to revise the Sec. 173.309
introductory text to include cylinders used as part of a fire
suppression system as a cylinder type authorized for transport in
accordance with the HMT entry for fire extinguishers. The controls
detailed in Sec. 173.309 provide an acceptable level of safety
regardless of whether the cylinder is equipped for use as a handheld
fire extinguisher or as a component of a fixed fire suppression system.

P-1563

3M Corporation submitted P-1563 requesting that PHMSA address the
regulatory confusion between marking requirements for overpacks in
Sec. 173.25 and outside packages for certain thin-walled cylinders
specified in Sec. 173.301(a)(9). The petitioner notes that the
differing marking requirements in Sec. Sec. 173.25 and 173.301(a)(9)
create confusion and make training difficult. This petition requests
modification of the HMR to permit materials packaged in conformance
with Sec. 173.301(a)(9)--except aerosols ``2P'' and ``2Q''--to display
the ``OVERPACK'' marking described in Sec. 173.25, in lieu of the
current requirement for ``an indication that the inner packaging
conforms to prescribed specifications.''
In accordance with Sec. 173.301(a)(9), DOT-specification 2P, 2Q,
3E, 3HT, spherical 4BA, 4D, 4DA, 4DS, and 39 cylinders must be packed
in strong non-bulk outer packagings. This configuration meets the
definition of a combination package as indicated in paragraph (a)(9)
and further, as defined in Sec. 171.8 of the HMR. Paragraph (a)(9)
requires the outside of this combination packaging to be marked with an
indication that the inner packagings conform to the prescribed
specifications. The completed combination package is subject to marking
and labeling, as appropriate; however, the inner packagings do not have
to be marked or labeled. These combination packages cannot also then be
considered ``overpacks.'' For each completed package bearing required
marking(s) and label(s) that is placed in an overpack, for
consolidation or ease of handling, the overpack must also display the
appropriate marking(s) and label(s) unless visible through the overpack
[see Sec. 173.25(a)(2)]. The ``OVERPACK'' mark must be applied when
specification packagings are required by the HMR to communicate that
the overpack contains specification packagings in conformance with the
HMR.
The marking ``inside (inner) packages comply with the prescribed
specifications'' for overpacks in Sec. 173.25 was changed in 2004 to
``OVERPACK'' in an effort to better align with global overpack
requirements. The 3M Corporation accurately states that prior to 2004
both the overpack requirements in Sec. 173.25 and the requirement in
Sec. 173.301(a)(9) to package certain DOT-specification cylinders in
strong, non-bulk outer packagings used very similar language intended
to inform package handlers that although not visible, the inner
packages contained specification packagings that conformed to
appropriate DOT or UN standards.
PHMSA recognizes that differing marking requirements in Sec. Sec.
173.25 and 173.301(a)(9) to communicate the same intended meaning may
be causing confusion without enhancing safety. In order to address the
petition and provide for greater clarity, PHMSA is proposing to revise
Sec. 173.301(a)(9) to authorize use of the ``OVERPACK'' marking as
specified in Sec. 173.25(a)(3) as a method to satisfy the current
requirement in paragraph (a)(1) to mark the completed package with an
indication that the inner packagings conform to prescribed
specifications for the listed cylinders. We agree with 3M that the
issue is more complex for 2P and 2Q containers as specified in
Sec. Sec. 173.304, 173.305, and 173.306 and, therefore, are not
including 2P and 2Q in the allowance for the ``OVERPACK'' marking. The
revision will also include instructional language that the combination
package is not to be considered an ``overpack.'' PHMSA welcomes
comments from affected entities regarding the following: potential
consequences, safety and economic impacts, current level of difficulty
and unnecessary confusion, need for change, quantity of shipments per
year to be impacted, etc.

P-1572

Barlen and Associates submitted P-1572 requesting that PHMSA
explicitly state in Sec. 173.312 that for liquefied compressed gases
in Multiple-Element Gas Containers (MEGCs), the filling density of each
pressure receptacle must not exceed the values contained in Packing
Instruction P200 of the UN Model Regulations, as specified in Sec.
173.304b, and the contents of each DOT-specification cylinder cannot
exceed the densities specified in Sec. 173.304a(a)(2).\4\
---------------------------------------------------------------------------

\4\ Note that the petition specifically referenced the 17th ed.
of the UN Model Regulations, however, we will propose a change that
references the edition currently incorporated by reference in Sec.
171.7 because we biennially update the edition for harmonization
with international standards.
---------------------------------------------------------------------------

Requirements for shipping MEGCs are specified in Sec. 173.312.
Specifically, Sec. 173.312(b) details the filling requirements for
MEGCs and states,'' [a] MEGC may not be filled to a pressure greater
than the lowest marked working pressure of any pressure receptacle [and
a] MEGC may not be filled above its marked maximum permissible gross
mass.'' The requirement that each pressure receptacle contained in the
MEGC may not be filled above the working pressure of the lowest marked
working pressure of any pressure receptacle is clear for permanent
(non-liquefied compressed) gases, which are generally filled by
pressure; however, Sec. 173.312(b) does not contain a corresponding
requirement addressing pressure receptacles containing a liquefied
compressed gas, which are most often filled by weight. This lack of
specificity for MEGCs containing liquefied compressed gas has led to
some confusion on methods for their proper filling. Therefore, in this
NPRM, we propose to specify the filling ratio requirements for pressure
receptacles.
PHMSA does not anticipate this provision will impose any new
burden, as this proposal would only emphasize an important safety
requirement already stated in Sec. 173.304a for DOT-specification
cylinders and Sec. 173.304b for UN pressure receptacles. PHMSA invites
comments from affected entities regarding the following: Safety and
economic impacts, level of difficulty and unnecessary confusion, need
for change, etc.

[[Page 48988]]

P-1580

HMT Associates submitted P-1580 requesting that PHMSA revise
Sec. Sec. 173.302(f)(2) and 173.304(f)(2) to require that the burst
pressure of a rupture disc coincide with CGA S-1.1 for DOT 39 cylinders
offered for transportation after October 1, 2008; other DOT-
specification cylinders with the first requalification due after
October 1, 2008; and UN pressure receptacles prior to initial use.
Specifically, as prescribed in 4.2.2 of CGA S-1.1, the required burst
pressure of the rupture disc ``shall not exceed 80% of the minimum
cylinder burst pressure and shall not be less than 105% of the cylinder
test pressure.''
Section 173.301(f) states that a cylinder filled with a compressed
gas and offered for transportation ``must be equipped with one or more
[pressure relief devices (PRDs)] sized and selected as to type,
location and quantity and tested in conformance with CGA S-1.1
[Pressure Relief Device Standards--Part 1--Cylinders for Compressed
Gases, Fourteenth Edition (2005)] and CGA S-7 [Method for Selecting
Pressure Relief Devices for Compressed Gas Mixtures in Cylinders
(2005)].'' Sections 172.302(f)(2) and 172.304(f)(2) specify that the
rated burst pressure of a rupture disc for DOT 3A, 3AA, 3AL, 3E, and 39
cylinders, as well as that for UN ISO 9809-1, ISO 9809-2, ISO 9809-3,
and ISO 7866 cylinders containing oxygen, compressed; compressed gas,
oxidizing, n.o.s.; or nitrogen trifluoride, must be 100 percent of the
cylinder minimum test pressure with a tolerance of `plus zero' to minus
10 percent.
In response to PHMSA's NPRM entitled ``Hazardous Materials:
Miscellaneous Amendments'' published on September 29, 2010 [75 FR
60017] under Docket No. PHMSA-2009-0151 (HM-218F), HMT Associates
submitted a late-filed comment that identified a potential discrepancy
between the HMR and CGA S-1.1. Specifically, this commenter stated the
HMR have different PRD settings than CGA S-1.1 for DOT 39 cylinders
that make it virtually impossible to comply with both the HMR and CGA
S-1.1. Sections 173.302(f)(2) and 173.304(f)(2) require the rated burst
pressure of a rupture disc for DOT 3A, 3AA, 3AL, 3E, and DOT 39
cylinders to be 100 percent of the cylinder minimum test pressure with
a tolerance of `plus zero' to minus 10 percent, whereas section 4.2.2
of CGA S-1.1 requires the rated burst pressure of the rupture disc on
DOT 39 cylinders to be not less than 105 percent of the cylinder test
pressure.
In this NPRM, PHMSA proposes to revise Sec. 173.301(f) as it
applies to DOT 39 cylinders to alleviate any confusion and conflict
between the PRD requirements in Sec. 173.301(f) and those in
Sec. Sec. 173.302(f)(2) and 173.304(f)(2) with respect to minimum
burst pressure of pressure relief devices on a DOT 39 cylinder used for
the transport of compressed and liquified oxidizing gases by air. PHMSA
notes that the revision made to Sec. 173.301(f) was based on option 2
presented in HMT Associates comment to rulemaking HM-218F and submitted
as petition P-1580. PHMSA requests comments from the compressed gas
industry regarding this course of action.

P-1582

Water Systems Council submitted P-1582 requesting that PHMSA revise
Sec. 173.306(g), which provides a limited quantity exception for water
pump system tanks, by permitting tanks manufactured to American
National Standards Institute (ANSI) and Water Systems Council (WSC)
standard PST-2000-2005(2009) to be authorized for transport.
ANSI and WSC standard PST-2000-2005 is an industry standard that
prescribes minimum performance and construction requirements for
pressurized storage tanks for service in water well systems with a
maximum factory pre-charge pressure of 40 psig (280 kPa), to be
operated in ambient air temperatures up to 120[emsp14][deg]F (49
[deg]C), with maximum working pressures not less than 75 psig (520 kPa)
and not greater than 150 psig (1,000 kPa) and tank volumes not
exceeding 120 gallons (450 L). The standard was developed by a group of
WSC members comprised of leading U.S. manufacturers of pressurized
water storage tanks for water wells to define and promote--through
voluntary written standards--minimum performance and construction
requirements for pressurized water storage tanks for service in water
well systems. Incorporating the standard into the HMR will provide
minimum requirements for pressurized water storage tanks for water
wells that provide at least an equivalent level of safety as currently
provided in the HMR.
PHMSA identified 38 U.S. based manufacturers or distributors of
water pump system tanks, most of which would be classified as a small
business using SBA size standards (<500 employees). There are no costs
associated with this proposal because it is already incorporated into
the regulations. This proposal will authorize tanks to be tested to
current standards in the HMR or the manufacturer's specified minimum
working pressure. Further, it allows water pump system tanks to be
charged with helium in addition to the currently authorized nitrogen.
The revisions would provide greater flexibility to stakeholders without
compromising safety. Therefore, in this NPRM, PHMSA is proposing these
recommended changes.

P-1592

The CGA submitted P-1592 requesting that PHMSA replace the 2005
edition of CGA S-1.1, Pressure Relief Device Standards-Part 1-Cylinders
for Compressed Gases with the 2011 edition as referenced in the HMR.
CGA S-1.1 provides standards for selecting the correct pressure
relief device to meet the requirements of Sec. 173.301(f) for over 150
gases. It provides guidance on when a pressure relief device can be
optionally omitted and when one's use is prohibited, as well as
direction on their manufacture, testing, operational parameters, and
maintenance.
PHMSA identified approximately 5,000 companies that would be
subject to this standard, with the majority being classified as small
businesses using SBA size standards (<500 employees).
This minor update to the regulations improves the timeliness and
clarity of industry standards that are IBR. It supports the goal of
facilitating voluntary compliance and reducing the burdens associated
with references to outdated material. Therefore, in this NPRM, PHMSA is
proposing these recommended changes.

P-1596

Chemically Speaking, LLC submitted P-1596 requesting that PHMSA
revise the HMR pertaining to salvage drums. Specifically, they propose
amending Sec. 173.3(d) to allow Class 4 and Class 5 materials to be
placed in salvage cylinders.
For over 30 years the gas industry, public agencies, gas cylinder
users, and gas disposal companies have used open head salvage cylinders
fabricated to ASME specifications to quickly and safely contain and
transport leaking cylinders to locations where they can be safely
emptied or repaired. Salvage cylinders were originally permitted under
special permits (exemptions) specific for each design,\5\ but these
exemptions were adopted into the HMR in 2005. Class 4 or 5 materials
were not

[[Page 48989]]

included in the adoption; however, there is no preamble language in the
rules specifically indicating reasons for the exclusion. A salvage
cylinder made to ASME specifications as a pressure vessel and packaged
as prescribed in Sec. 173.3(d) is a more robust package than a salvage
container, which is used for liquids or solids. The addition of a
pyrophoric material will not add a new hazard in the use of salvage
cylinders, as some of the compressed gases that are also authorized
have pyrophoric properties, such as silane, 2.1 (UN2203) or phosphine,
2.3 (UN2199). Moreover, these gases also have the added hazards of high
pressure (1,500 psig), with the latter also being a toxic material.
---------------------------------------------------------------------------

\5\ DOT-E 9507, 9781, 9991, 10022, 10110, 10151, 10323, 10372,
10504, 10519, 10789, 10987, 11257, 11459, 12698, 12790, and 12898.
---------------------------------------------------------------------------

Over a period of four years (2006-2010), the use of salvage
pressure receptacles was debated at the UN Subcommittee on
Transportation of Dangerous Goods. Numerous papers were submitted in
support of this effort. In the December 2010 session, the use of
salvage pressure receptacles was approved and published in ``Amendments
to the sixteenth revised edition of the Recommendations on the
Transport of Dangerous Goods, Model Regulations.'' The amendments
include the authorization of salvage cylinders for Class 4 and 5
materials.
This change will have a positive economic impact on owners of
salvage cylinders as this will increase the instances where a salvage
cylinder can be used. Many metal alkyl users and gas suppliers already
own a salvage cylinder. There will be a negligible burden for
procedures to be updated to include these cylinders. Therefore, in this
NPRM, PHMSA is proposing these recommended changes; however, we do not
propose additional reporting requirements.

P-1622

Worthington Cylinders submitted P-1622 requesting that PHMSA allow
the internal volume of DOT 39 cylinders not to exceed 75 cubic inches,
which will be reflected in revisions to the entries for cyclopropane,
ethane, and ethylene in the Sec. 173.304a(a)(2) table to include this
limit in new footnote ``Note 9.'' This proposal would also clarify the
75 cubic inch limit for DOT 39 cylinders by adding it in a new sentence
to Sec. 173.304a(d)(3). Worthington Cylinders states its
justifications for this petition are as follows:

As discussed in my May 2011 letter, 49 CFR went through a
rewrite in 2001. At this point in time, Paragraph 173.304 titled
``Charging of cylinders with liquefied compressed gas'' was divided
into two specific sections, 173.304 and 173.304a. Previous to the
change in 2001, Note 9 was present in the Table of Paragraph
173.304. This note stated ``When used for shipment of flammable
gases, the internal volume of a Specification 39 cylinder must not
exceed 75 cubic inches.'' This would apply specifically to cylinders
containing liquefied compressed gases. At the same time, Paragraph
173.302 titled ``Charging of cylinder with non-liquefied compressed
gases'' stated in subsection 4 that for ``Specification 39 cylinders
for flammable gases, the internal volume may not exceed 75 cubic
inches.'' This paragraph would specifically pertain to cylinders
charged with non-liquefied gases.
The problem lies with each edition of 49 CFR published since
2001. Paragraph 173.304a is not making any statement limiting the
Specification 39 cylinder volume when charging the cylinder with
liquefied flammable gases, yet paragraph 173.302a(3) limits the
flammable compressed gas in a Specification 39 cylinder to a maximum
of 75 cubic inches. Clearly, DOT would not want to authorize a
liquefied flammable compressed gas for any volume Specification 39
cylinder when the specifications limit the volume to 75 cubic inches
for a flammable compressed gas. I will use propane as an example:
Propane can be shipped as a compressed gas or a liquefied compressed
gas. If it is shipped as a compressed gas the specifications limit
the shipper to a container 75 cubic inches or smaller (49 CFR
173.302). If the shipper was shipping propane as a liquefied
compressed gas there are no limitations in the regulations on the
Specification 39 cylinder volume (49 CFR 174.304a). This clearly
makes no logical sense when propane expands 270 times its volume
from a liquid to a vapor. Why would the stored energy for a
Specification 39 cylinder with vapor be limited to 75 cubic inches
and for a liquid have no limitations?
Specification 39 cylinders have a proven track record. Millions
of these cylinders have been manufactured and used for the safe and
reliable storage and transportation of compressed gases and
liquefied compressed gases. This proven safety and reliable track
record includes 2.1 flammable liquefied compressed gases limited to
75 cubic inch capacity. Worthington's concerns of using up to 1526
cubic inch volume cylinders for 2.1 flammable liquefied compressed
gases centers around the puncture resistance and corrosion
resistance which are ``real life'' issues in the transportation of
cylinders. Releasing basically four gallons of propane from a
Specification 39 cylinder from a puncture or corrosion is not in the
best interest of safety. Worthington strongly recommends that PHMSA
review the following and consider it as immediate changes to 49 CFR
173.304a and 173.304(d)(3).

PHMSA agrees with the petitioner and will permit valves other than
those listed in CGA S-1.1 to be used by adding the word ``may'' to this
phrase in the regulatory text: ``a CG-7 pressure relief valve may be
used.'' In this NPRM, PHMSA is proposing these recommended changes.
Worthington Cylinders also asked PHMSA to explain what is meant by
``chemical under pressure'' in Sec. 173.302a(a)(3) as it relates to
this phrase: ``or 50L for chemical under pressure.'' Section
173.302a(a) describes detailed filling requirements for the shipment of
non-liquefied (permanent) compressed gases in specification cylinders.
Specifically, Sec. 173.302a(a)(3) limits the capacity of a DOT 39
cylinder to 1.23 L (75 in\3\) when the cylinder is filled with a
Division 2.1 material or 50 L (3050 in\3\) when the cylinder is filled
with a chemical under pressure. PHMSA revised Sec. Sec. 173.301b and
173.302a in a final rule [Docket No. PHMSA-2012-0027 (HM-215L); 78 FR
988] to increase the maximum allowable water capacity for non-
refillable cylinders containing chemicals under pressure to 50 liters
(3050in\3\); therefore, this request has been addressed.
The phrase in question was added to the HMR under a final rule
published January 7, 2013 (HM-215L; 78 FR 988). Under that final rule
we introduced new HMT entries for ``chemical under pressure,'' assigned
authorized non-bulk and bulk packaging, and included other safety
requirements such as quantity and filling limits. See Sec. Sec.
172.102, Special Provision 362, and 173.335. In the HM-215L final rule
(78 FR 989), PHMSA discussed a comment received from 3M in support of
the proposal; however, 3M requested that PHMSA authorize the use of
non-refillable cylinders (i.e., DOT 39s) larger than 1.25 liters
containing flammable gas consistent with the UN Model Regulations. We
noted our '' intent regarding the chemical under pressure entry was to
comprehensively align the requirements of this entry with international
standards.'' In the HM-215L final rule, we revised the packaging
requirements for chemical under pressure to authorize the use of
nonrefillable cylinders larger than 1.25 liters for chemical under
pressure, hence, the inclusion of ``or 50L for chemical under
pressure'' for DOT 39 cylinders in Sec. 173.302a(a)(3). This language
applies to ``chemicals under pressure'' as described in Special
Provision 362 and must not be applied to flammable gases. PHMSA is also
looking to resolve the discrepancy created by this allowance for larger
capacities for this cylinder type because it exceeds the size limits
authorized under the design specifications for DOT 39 cylinders in
Sec. 178.65. In this NPRM, PHMSA is proposing to revise Sec.
173.302a(a)(3) to clarify any confusion on the applicable capacity
limits.

P-1626

The CGA submitted P-1626 requesting that PHMSA IBR CGA C-1,

[[Page 48990]]

Methods for Pressure Testing Compressed Gas Cylinders, Tenth Edition
(2009) and revise the regulations regarding the retesting of cylinders
by the hydrostatic test as they are not only unclear to requalifiers,
but also missing necessary information rendering the regulations
unenforceable. Although the petition proposed the Tenth Edition,
currently there is an Eleventh Edition (2016) available. PHMSA is
proposing to IBR this most current version and requests comment
regarding this action.
PHMSA identified approximately 980 entities that conduct
hydrostatic testing, including cylinder requalifiers, retesters, and
manufacturers.
In this NPRM, PHMSA is proposing to adopt clarifying language and
IBR the CGA C-1 standard, as proposed in P-1626, as it provides more
detailed instructions and illustrations than what is possible in the
HMR and addresses the deficiencies detailed in the petition. The CGA
requests that this proposed IBR apply to the following sections:
Sec. Sec. 178.36, 178.37, 178.38, 178.39, 178.42, 178.44, 178.45,
178.46, 178.47, 178.50, 178.50, 178.51, 178.53, 178.55, 178.56, 178.57,
178.58, 178.59, 178.60, 178.61, 178.65, 178.68, 180.205, and 180.209.
The incorporation of CGA C-1, 2016 supports the goal of increasing
compliance and improving overall safety as its reference increases
clarity, provides enhanced guidance, and reduces confusion between CGA
current dates and IBR versions. Specific clarifications include
instructions for performing volumetric expansion tests using both the
water-jacket and direct expansion methods, as well as a provision for
retesting in case of equipment failure or operator error. Revising the
HMR to IBR CGA C-1 will provide the desired clarification without
imposing requirements that are potentially costly or unnecessarily
difficult.

P-1628

The CGA submitted P-1628 requesting that PHMSA IBR CGA C-3-2005,
Reaffirmed 2011, Standards for Welding on Thin-Walled, Steel Cylinders,
Seventh Edition as material incorporated by reference in the HMR.
Presently, the HMR reference CGA C-3-1994, Standards for Welding on
Thin-Walled Steel Cylinders, Fourth Edition.
This publication contains information on welding process
qualification, welding operator qualifications, tensile testing, bend
testing, and radiographic inspection. The changes between the C-3-1994,
Fourth Edition and the C-3-2005, Reaffirmed 2011, Seventh Editions were
predominantly editorial or technical in nature. The significant
technical changes are summarized as follows and can be reviewed in
detail in the docket to this petition:
Added section to the testing criteria to employ the use of
macro etch samples in lieu of weld guided bend test and weld tensile
testing when the cylinder size would not permit securing of proper size
specimens.
Clarified the weld bend testing procedure, weld bend
testing tooling, and proper clearances that are required in the
tooling.
Clarified definitions for the welding procedure
qualification and the welding operator weld qualification.
Added tolerance section to C-3-2005, Reaffirmed 2011 that
indicates the plus and minus tolerances when a specific dimensional
tolerance is indicated in the publication.
Added drawings to the C-3-2005, Reaffirmed 2011
illustrating different weld joint designs.
Reviewed C-3-2005, Reaffirmed 2011 for conditional wording
and revised it for enforceable wording.
PHMSA identified approximately 5,000 companies that would be
subject to this standard, with the majority being classified as small
businesses using SBA size standards (<500 employees).
This minor update to the regulations improves the timeliness and
clarity of industry standards that are IBR. It supports the goal of
facilitating voluntary compliance and reducing the burdens associated
with references to outdated material. Therefore, in this NPRM, PHMSA is
proposing these recommended changes.

P-1629

The CGA submitted P-1629 requesting that PHMSA IBR CGA C-14-2005,
Reaffirmed 2010, Procedures for Fire Testing of DOT Cylinder Pressure
Relief Device Systems, Fourth Edition, as a material incorporated by
reference in the HMR. Presently, the HMR reference CGA C-14-1979,
Procedures for Fire Testing of DOT Cylinder Pressure Relief Device
Systems, First Edition. Since the incorporation of this edition, CGA
has revised the publication in 1992, 1999, 2005, and reaffirmed the
publication in 2010.
This standard describes test procedures and apparatus for fire
testing compressed gas cylinder safety (pressure) relief devices as was
required by former Sec. 173.34(d). The procedures are applicable for
cylinders that are less than 500 pounds water capacity and designed to
provide a means of testing to DOT requirements anywhere with reliable
test data and repeatable test results. The changes from the 1979 First
Edition to the 2005 and Reaffirmed 2010 editions of CGA C-14 were
predominantly editorial or technical in nature. The significant
technical changes are summarized as follows and can be reviewed in
detail in the docket to this petition:
Permitted the use of an alternate lading. If the intended
lading would present an increased safety hazard during the test
procedure (such as the use of poisonous or flammable gas), the cylinder
may be charged with a typical liquefied or non-liquefied gas. Gases
with essentially similar physical properties may be classified as
typical.
Added the Bonfire Test Method to the publication. This
permitted the Board of Explosives (BOE) test method to be used to
qualify pressure relief device systems. The Bonfire Test Method was
successfully used to qualify pressure relief device systems for
decades.
Clarified what information is to be recorded before and
during the actual test.
Increased the water capacity of a cylinder that can be
fire tested from 500 lb. water capacity to 1000 lbs. water capacity to
permit a test method for all 4 series cylinders.
Reviewed C-14-2005, Reaffirmed 2010 for conditional
wording and modified it to replace conditional wording with enforceable
wording, wherever appropriate.
PHMSA identified approximately 5,000 companies that would be
subject to this standard, with the majority being classified as small
businesses using SBA size standards (<500 employees).
This minor update to the regulations improves the timeliness and
clarity of industry standards that are IBR. It supports the goal of
facilitating voluntary compliance and reducing the burdens associated
with references to outdated material. Therefore, in this NPRM, PHMSA is
proposing these recommended changes.

P-1630

The CGA submitted P-1630 requesting that PHMSA revise the HMR
requirements for DOT 4L welded insulated cylinders. Specifically, the
CGA requests PHMSA make two changes:
(1) Add a Definition for ``Recondition'' to Sec. 180.203
The CGA states ``[t]he term `recondition' is distinct from work
presently defined as repair or rebuild and describes work on a part or
component of a DOT 4L welded insulated cylinder that does not involve
repair or rebuilding of the inner containment vessel. For purposes of
this

[[Page 48991]]

petition, the inner containment vessel refers to the term cylinder as
defined in Sec. 171.8. In addition, DOT 4L welded insulated cylinder
refers to that packaging defined in Sec. 178.57.'' The CGA did not
propose language for the definition.
The HMR prescribe the requirements for reconditioning DOT 4L
cylinders in Sec. 180.211, further specifying additional requirements
for rebuilding DOT 4L cylinders in paragraph (e). ``Recondition'' is a
word that describes a process that applies to several cylinder
packaging types under the HMR. PHMSA is concerned that adding a
definition for ``recondition'' that applies only to DOT 4L
specification cylinders would cause confusion that may reduce the safe
application of these regulations. Therefore, PHMSA is not proposing in
this NPRM to define a ``reconditioned cylinder'' in Sec. 180.203.
(2) Amend Paragraphs Sec. Sec. 180.211(c) and 180.211(e) To Clarify
when a Hydrostatic Test Must Be Performed on the Inner Containment
Vessel After the DOT 4L Welded Insulated Cylinder has Undergone Repair
as Interpreted in DOT Letters of Interpretation Reference Nos. 11-0237
and 12-0065
Reference No. 11-0237 states: ``[t]he term `rebuild' is defined in
Sec. 180.203 as the replacement of a pressure part (e.g., a wall,
head, or pressure fitting) by welding. While a `rebuild' would be
required when the inner vessel of a DOT-4 series cylinder is
compromised, it is not the only scenario that would constitute a
`rebuild.' DOT-4 series cylinders requiring rebuild, as defined in
Sec. 180.203, must do so in conformance with Sec. 180.211. In
addition, DOT 4L cylinders must meet additional requirements for repair
specified in Sec. 180.211(e) including proof pressure testing each
inner containment vessel at two times its service pressure. DOT 4L
cylinders which undergo procedures that are not defined as a rebuild in
Sec. 180.203 are not subject to the requirements of Sec.
180.203(e).''
Reference No. 12-0065 states: ``[t]he term `repair' is defined in
Sec. 180.203 as a procedure for correction of a condemned cylinder
that may involve welding. A repair is not limited to the correction of
a condemned cylinder that has had only its inner vessel compromised;
therefore, DOT-4 series cylinders requiring repair, as defined in Sec.
180.203, must be done in conformance with Sec. 180.211. In addition,
DOT 4L cylinders must meet additional requirements for repair specified
in Sec. 180.211(c) including being pressure-tested in conformance with
the specifications under which the cylinder was originally
manufactured. DOT 4L cylinders which undergo procedures that are not
defined as a repair in Sec. 180.203 are not subject to the
requirements of Sec. 180.211(c) including the requirement to be
pressure-tested in conformance with the specifications under which the
cylinder was originally manufactured.''
The CGA notes its understanding that these DOT interpretations
``state that testing the inner containment vessel after reconditioning,
as defined below, are relatively new and prior to these interpretations
no such testing had taken place.'' The CGA further notes that it
``knows of no incidents related to the lack of such testing.''
While the requirements the petitioner is referring to have existed
since 2002 [67 FR 51626]--and prior to that to some extent in former
Sec. 173.34--PHMSA agrees with the petitioner that adding language to
clarify when a rebuilt DOT 4L cylinder and its components need to be
pressure tested would make this requirement easier to understand;
therefore, PHMSA is revising Sec. 180.211(c) to include the clarifying
language about this requirement included in letter Reference No. 11-
0237.
The CGA further states its ``purpose for requesting amendments to
Sec. Sec. 180.211(c) and 180.211(e) is to clarify that certain work on
parts and components of a DOT 4L welded insulated cylinder other than
the inner containment vessel does not require hydrostatic testing of
the inner containment vessel. The addition and definition of the term
`recondition' with respect to these DOT 4L welded insulated cylinders
identifies this work and enables verification of the integrity of such
work using a pneumatic leak test at 90% of service pressure for which
the DOT 4L welded insulated cylinder was designed and tested and by
using a mass spectrometer detection system.''
As previously stated, while this requirement has existed since
2002, PHMSA agrees with the petitioner that revising the language in
Sec. 180.211(e) to include the language in letter Reference No. 12-
0065 would improve the understanding of this requirement and, thereby,
possibly improve safety.
In this NPRM, PHMSA is proposing to amend Sec. 180.211(c) and (e)
for clarification as petitioned.

IV. Special Permits

In the ANPRM, PHMSA considered proposing revisions to adopt certain
special permits into the HMR. Specifically, PHMSA proposed changes
based on DOT-SPs 12929, 13318, and 13599. We are no longer proposing
changes in this NPRM in association with these special permits because:
(1) DOT-SP 12929 was determined not suitable for adoption under
rulemaking HM-233F (80 FR 5340; January 30, 2015); and (2) DOT-SPs
13318 and 13599 were adopted under HM-233F (81 FR 3635; January 21,
2016).
Since publication of the ANPRM, we have considered proposing
revisions to the HMR based on adoption of DOT-SP 14237. For over ten
years, PHMSA has authorized the use of certain non-bulk DOT-
specification cylinders to transport specific adsorbed gases under
special permits. DOT-SP 14237, first issued on December 22, 2006, is
general in its application in that it does not require the use of
drawings and applications for DOT-specification cylinders that are
specific to one company. Adopting this special permit would reduce
costs associated with application and management, while also increasing
safety and expanding the use of DOT-specification cylinders for
adsorbed gases. PHMSA is not aware of any incident or investigation
concerning the performance of packaging and transport under this
special permit since its issuance; therefore, PHMSA is proposing in
this NPRM to adopt the special permit into the HMR.
Furthermore, PHMSA added provisions to the HMR for shipping
adsorbed gases in a final rule issued on January 7, 2015 [Docket No.
PHMSA-2013-0260 (HM-215M); 80 FR 1075] applicable to UN pressure
receptacles. Specifically, these changes incorporated international
standards designed to allow the transportation of certain gases when
they are adsorbed onto a porous solid material in a non-bulk UN
standard pressure receptacle. Two commenters to the HM-215M NPRM
requested that PHMSA also permit adsorbed gases in DOT-specification
cylinders. One commenter, Entegris, Inc., proposed regulatory text that
includes DOT cylinder specifications and provisions not previously
authorized under DOT special permit. PHMSA chose not to accept the
comment and did not adopt the changes at that time; however, PHMSA
invites the public to review Entegris, Inc.'s comments under Docket No.
PHMSA-2013-0260 at www.regulations.gov and to comment on the safety and
costs associated with its proposal and its possible inclusion under new
Sec. 173.302d.

V. Agency Initiated Editorial Corrections

In an ongoing attempt to improve safety, PHMSA regularly reviews
and revises the HMR to correct errors and

[[Page 48992]]

clarify any regulations that are unclear or confusing. PHMSA is
adopting the following issues of concern into this NPRM and seeks
comment regarding the changes.

Section 107.803

Section 107.803 provides approval procedures for independent
inspection agencies (IIA) conducting cylinder inspections and
verifications as required by parts 178 and 180. In its application for
approval status, the IIA must provide information, including a detailed
description of its qualifications and ability both to perform and to
verify inspections. However, at present, the application information
requirements of Sec. 107.803(c)(3) only reference part 178. In this
NPRM, PHMSA is proposing to revise Sec. 107.803(c)(3) to include part
180, subpart C for consistency.

Section 107.805

Section 107.805 provides approval procedures for persons to
inspect, test, certify, repair, or rebuild a cylinder in accordance
with the HMR. PHMSA is proposing to revise the requirements for
application for approval of cylinder requalifiers to include a
reference to the option of having a mobile cylinder requalification
unit (i.e., a mobile unit). See Sec. 180.203 for further discussion.

Section 178.70

Section 178.70 provides approval for the manufacture of UN pressure
receptacles (i.e., cylinders). Current Sec. 178.70(d) restricts the
user (manufacturer) from the flexibility that is provided in the UN/ISO
standards. The regulation as constructed results in additional cost and
delay without any added safety. The UN/ISO standards are developed
based on performance testing and include adequate testing for a wide
range of design-type modifications. All UN/ISO standards to which the
original design type conforms permit certain modifications to an
approved design type. PHMSA has received several requests to revise
this regulation to allow an authorized manufacturer to benefit from the
UN Model Regulations and produce UN/ISO cylinders. In this NPRM, PHMSA
is proposing to adopt language consistent with UN/ISO standards to
reduce the need for approvals.

Section 180.203

Section 180.203 specifies definitions that apply to cylinder use,
qualification, and maintenance. PHMSA has encountered frequent problems
regarding this section and is recommending the following revisions:
(1) Define and Incorporate ``Mobile Unit'' Requalification Operations
The hazardous materials program procedures of 49 CFR part 107 for
approval of cylinder requalifiers do not specify the option of a
``mobile cylinder requalification unit.'' The intent of this operation
is for a cylinder requalifier to be able to perform its requalifying
function within a 100-mile radius of its primary place of business. To
operate, a mobile cylinder requalifier must adhere to the requirements
in a PHMSA-issued approval letter.
Since companies may not be familiar with the option to offer mobile
testing of cylinders to their customers through an approval by the
Associate Administrator, PHMSA is proposing in this NPRM to add a
definition of ``mobile unit'' to the HMR in Sec. 180.203 and a new
paragraph in Sec. 107.805 identifying application requirements for
mobile units. These proposed revisions would enhance requalifiers'
ability to perform cylinder requalifications under the scope of the
HMR.
(2) Revise Definition of Proof Pressure Test for Cylinders
The HMR no longer prescribe modified hydrostatic pressure testing,
which has been and continues to be the method of low-pressure testing
of fire extinguishers. Not all retesters know that proof pressure
testing allows the test to be performed with just air (no water),
therefore taking approximately one-third the time of a modified hydro
test without wasting water. The required test is only looking for leaks
not determining a cylinder expansion percentage rate. We expect that
use of a proof pressure will pass along cost savings to a requalifier.
The HMR prescribes in Sec. 180.209(e) (for DOT 4-series cylinders)
and (j) (for fire extinguishers) that a proof pressure test is
authorized. In Sec. 180.203, proof pressure test is defined as ``a
pressure test by interior pressurization without the determination of
expansion of the cylinder'' (i.e., a leak test). In this NPRM, PHMSA is
proposing to revise the definition of proof pressure test to specify
that a liquid or a gas may be used to conduct the test. However, we
note that the safety risk for conducting this test is substantially
more using gas such as air versus a liquid such as water although this
risk is lessened for low-pressure cylinders such as fire extinguishers.
We seek comment on the impact of this revision and whether this
clarification achieves the intent of enhancing compliance by specifying
the air may be used for a proof pressure test. We also invite comment
on a better method for communicating that a gas may be used for a proof
pressure test, preferrable for low-pressure cylinders.

Section 180.207

Section 180.207(d) authorizes the use of ISO 6406 to requalify UN
refillable seamless steel cylinders and UN refillable seamless steel
tube cylinders. The current ISO 6406 has a limitation of 150 liters for
the size of these cylinders, which is substantially less than the
maximum volume of a UN refillable seamless steel tube (3,000 liters).
PHMSA has received several requests for interpretation of this
regulation and its application to the requalification of UN seamless
steel pressure receptacles larger than 150 liters. PHMSA responded to
these requests through a letter of clarification issued under Reference
No. 13-0146, stating that Sec. 180.207(d)(1) authorizes the
requalification of seamless steel UN pressure receptacles larger than
150 liters. In addition, PHMSA Engineering staff is participating in an
ISO/TC58/SC4 working group that is considering a revision to the ISO
6406 standard to include pressure receptacles larger than 150 liters;
therefore, PHMSA is proposing in this NPRM to add the phrase ``larger
than 150 liters'' after ``including MEGC's pressure receptacles'' to
clarify that the use of larger UN pressure receptacles is permitted
under Sec. 180.207(d)(1).

Section 180.213

Section 180.213 prescribes marking requirements for the visual
inspection of cylinders (see Sec. 180.213 paragraphs (f)(5), (f)(8),
and (f)(9)). In the past, PHMSA has allowed a visual (V) requalifier
identification number (i.e., a V number) to be marked in the same
manner as a requalifier identification number (RIN) marking per Sec.
180.213. V number markings have four different options for markings;
however, PHMSA issues approval letters that permit a V number marking
yet only provide three of the four available marking options and do not
reference Sec. 180.213.
Section 180.213 of the HMR should include the marking requirements
for a V number consistent with those for an RIN. The V number could be
placed in a square pattern as shown in Sec. 180.213. However, marking
a V number, which is a single letter followed by six numbers, in a
square pattern like an RIN, which is a single letter followed by three
numbers, requires clarification, as the marks vary. Including the
marking requirements for V numbers into Sec. 180.213 will make
authorized options for these identifiers to be placed on a cylinder
more widely understood.

[[Page 48993]]

PHMSA is proposing in this NPRM to include this V number marking in
Sec. 180.213(g).

Section 180.215

Section 180.215(a)(6) requires that a person who requalifies,
repairs, or rebuilds cylinders must maintain in their records and
report information contained in each applicable CGA or ASTM standard
incorporated by reference under Sec. 171.7 of the HMR that applies to
requalifier activities. In this NPRM, PHMSA is proposing to remove the
last sentence of paragraph (a)(6) of this section to reduce confusion,
as it essentially repeats what is requested in the first sentence of
this paragraph.

VI. Section-by-Section Review

Section 107.803

Section 107.803(c)(3) states that each application to obtain
approval to perform duties as an IIA must contain a detailed
description of the applicant's qualifications and ability both to
perform the inspections and to verify the inspections required by part
178 of the HMR or under the terms of a DOT special permit. In this
NPRM, we propose to revise Sec. 107.803(c)(3) to clarify that the
applicant's description of his or her ability to perform and verify
inspections must include those required under 49 CFR part 180, subpart
C.

Section 107.805

Section 107.805(c) prescribes additional information an application
must contain to obtain approval from PHMSA to requalify cylinders and
pressure receptacles. In this NPRM, we propose to add paragraph (c)(5)
to this section to clarify what information must be added to the
application to authorize mobile unit requalifiers and the information
necessary to acquire approval. We also propose to make a conforming
edit to paragraphs (c)(3) and (c)(4) by moving the ``and'' clause from
paragraph (c)(3) to (c)(4).

Section 171.7

Section 171.7 lists reference standards and regulations
incorporated by reference into the HMR that are not specifically set
forth in the HMR. Paragraph (g) incorporates into the HMR publications
issued by the American Society of Mechanical Engineers, specifically,
the ASME Boiler and Pressure Vessel Code. In this NPRM, we propose to
revise the list of sections in paragraph (g)(1) to include Sec.
173.302d based on the addition of this new section to the HMR and its
reference to this standard in Sec. 173.302d(b)(11). Also, paragraph
(n) specifically incorporates into the HMR publications issued by the
Compressed Gas Association, an industrial and medical gas association
that, among others, develops standards and practices for the safe
transportation of gases and their containers. In this NPRM, we propose
to add to Sec. 171.7(n) the latest CGA publication C-1, Methods for
Pressure Testing Compressed Gas Cylinders. We also propose to update
the editions of CGA publications C-3, C-6, C-14, and S-1.1 already
incorporated in the HMR. The remaining changes to paragraph (n) are
editorial based on PHMSA's initiative to renumber the list to
accommodate the new publications and add missing section number
symbols, punctuation, and spaces. Also, note a weblink in the ADDRESSES
section of the introduction to this rulemaking to review these
publications during the comment period. The documents are summarized
below.
The ASME publication is 2015 ASME Boiler and Pressure Vessel Code
(ASME Code) Section VIII--Rules for Construction of Pressure Vessels
Division 1. The publication provides requirements applicable to the
design, fabrication, inspection, testing, and certification of pressure
vessels operation at either internal or external pressures exceeding 15
psig. Division 1 also contains mandatory and nonmandatory appendices
detailing supplementary design criteria, nondestructive examination and
inspection acceptance standards. During the open comment period of this
NPRM, this publication is freely available on the ASME Web site at:
https://go.asme.org/PHMSA-ASME-PRM.
The Compressed Gas Association publications include the following:
(1) CGA C-1, Methods for Pressure Testing Compressed Gas Cylinders
(2016). During the open comment period of this NPRM, this publication
is freely available on the CGA Web site at: https://www.cganet.com/customer/dot.aspx. This publication provides the standard(s) for
pressure testing of compressed gas cylinders for many newly
manufactured cylinders and requalification of cylinders. This standard
contains operating and equipment requirements necessary to perform
pressure testing of compressed gas cylinders properly. Tests include
the water jacket method, direct expansion method, and proof pressure
method.
(2) CGA C-3, Standards for Welding on Thin-Walled Steel Cylinders
(2005) (Reaffirmed 2011). During the open comment period of this NPRM,
this publication is freely available on the CGA Web site at: https://www.cganet.com/customer/dot.aspx. This publication contains information
on welding process qualification, welding operator qualifications,
tensile testing, bend testing, and radiographic inspection.
Additionally, this publication clarifies dimensional tolerances and
when weld macro etch can be used for weld process approval and welder
qualification approval.
(3) CGA C-6, Standards for Visual Inspection of Steel Compressed
Gas Cylinders (2013). During the open comment period of this NPRM, this
publication is freely available on the CGA Web site at: https://www.cganet.com/customer/dot.aspx. This publication provides cylinder
users (requalifiers, owners, fillers, operators, etc.) with criteria to
accept, reject, and condemn steel compressed gas cylinders. This
standard does not cover all circumstances for each individual cylinder
type and condition of lading. Inspection procedures include preparation
of cylinders for inspection, exterior inspection, interior inspection
(if required), nature and extent of damage to be looked for, and for
some tests, the conditions of the cylinder, etc. A sample inspection
report is provided in an appendix.
(4) CGA C-14, Procedures for Fire Testing of DOT Cylinder Pressure
Relief Device Systems (2005) (Reaffirmed 2010). During the open comment
period of this NPRM, this publication is freely available on the CGA
Web site at: https://www.cganet.com/customer/dot.aspx. This publication
describes test procedures and apparatus for fire testing compressed gas
cylinder safety (pressure) relief devices as required by the HMR. The
procedures are applicable for cylinders that are less than 500 lbs.
water capacity and designed to provide a means of testing to the HMR
anywhere with reliable test data and repeatable test results.
(5) CGA S-1.1, Pressure Relief Device Standards--Part 1--Cylinders
for Compressed Gases (2011). During the open comment period of this
NPRM, this publication is freely available on the CGA Web site at:
https://www.cganet.com/customer/dot.aspx. This publication provides the
standard(s) for selection of the correct pressure relief device that is
required to meet the requirements of the HMR for over 150 gases. It
provides guidance on when a pressure relief device can be optionally
omitted, and when the use of a pressure relief device is prohibited. It
provides direction and guidance on the manufacture and testing of
pressure relief devices as well as the operation parameters and
maintenance.

[[Page 48994]]

Section 171.23

Section 171.23 prescribes requirements for transport of specific
materials and packaging under international transportation standards
such as the International Civil Aviation Organization Technical
Instructions for the Safe Transport of Dangerous Goods by Air.
Paragraph (a)(4) outlines requirements for filling of cylinders for
export or use onboard a vessel. In this NPRM, we propose to revise the
marking requirements consistent with changes made to Sec. 180.213.

Section 172.400a

Section 172.400a(a)(1) prescribes exceptions from labeling for
Dewar flasks or cylinders that comply with the provisions of this
paragraph and are durably marked and labeled in conformance with CGA C-
7. In this NPRM, we propose to revise paragraph (a)(1) to clarify how
this labeling exception applies to overpacks.

Section 173.3

Section 173.3(d)(1) prescribes how a damaged or leaking cylinder
that contains hazardous material may be transported in a non-DOT-
specification fully opening hinged-head or removable head steel salvage
cylinder. In this NPRM, we propose to permit cylinders that contain
Class 4 or 5 materials to also use this exception. In addition, because
of the proposal to include Class 4 or 5 materials as authorized
material for salvage cylinders, we are reformatting the regulatory text
to reference those materials in damaged or leaked cylinders that are
excluded from being allowed to be overpacked in a salvage cylinder
rather than listing those that are authorized.

Section 173.301

Section 173.301 provides the general requirements for shipment of
compressed gases and other hazardous material in cylinders. In this
NPRM, we propose to clarify the marking requirements of paragraph
(a)(9), specifically use of the ``OVERPACK'' mark to indicate the
combination packaging contains inner packagings that conform to
specifications. Additionally, in paragraphs (c) and (f), we propose an
editorial revision to the section citation of CGA S-1.1 to correctly
read 9.1.1. Finally, we propose to revise paragraph (f) to clarify the
minimum burst pressure requirements for DOT 39 cylinders used to
transport compressed or liquefied oxidizing gases.

Section 173.302

Section 173.302(a)(2) prescribes the requirements for adsorbed
gases. In this NPRM, we propose to include references to new Sec.
173.302d applicable to DOT-specification cylinders and to replace
reference to ``UN cylinders'' with ``UN pressure receptacles'' for
consistency with other parts of the HMR.

Section 173.302a

Section 173.302a(a)(3) prescribes the filling requirements for DOT
39 cylinders that contain Division 2.1 gas or chemical under pressure.
In this NPRM, we propose to clarify the capacity (internal volume)
requirements to make it clear that the 1.23 L limit applies to Division
2.1 material and the 50 L limit applies to chemical under pressure
classed as Division 2.1 (see Sec. 172.102, special provision 362). We
also propose an editorial correction to the start of paragraph (a)(3)
by removing the non-italicized ``DOT 39.''

Section 173.302d

In this NPRM, we propose to add new Sec. 173.302d prescribing
requirements for transportation of adsorbed gases in DOT-specification
cylinders. The requirements of this new section are based on the
adoption of special permit DOT-SP 14237 provisions.

Section 173.304a

Section 173.304a prescribes the maximum permitted filling density
and authorized cylinders for specific gases. In this NPRM, we propose
to add new paragraph (a)(3) to Sec. 173.304a to clearly state that the
maximum capacity (internal volume) of a DOT 39 cylinder containing
liquefied flammable gas is 1.23 liters (75 in\3\). We also propose to
require these cylinders to be equipped with a pressure relief valve, as
prescribed in CGA S-1.1, unless the material is not listed in CGA S-
1.1, in which case a CG-7 pressure relief valve must be used.

Section 173.306

Section 173.306 provides exceptions from the requirements of the
HMR for limited quantities of compressed gas. Paragraph (g) excepts
water pump system tanks charged with compressed air or limited
quantities of nitrogen to not over 40 psig from labeling and
specification packaging when shipped in conformance with the
requirements prescribed in the paragraph. In this NPRM, we propose to
revise Sec. 173.306(g) to authorize tanks to be tested to current
standards in the HMR or the manufacturer's specified maximum working
pressure, to allow water pump system tanks to be charged with helium,
to clarify that transportation by aircraft is not an authorized mode of
transport.

Section 173.309

In this NPRM, we propose to revise Sec. 173.309 to state that the
requirements applicable to fire extinguishers also apply to those
cylinders used as part of a fire suppression system.

Section 173.312

Section 173.312(b)(1) prescribes the filling requirements for
multiple element gas containers (MEGCs). In this NPRM, we propose
requirements for filling pressure receptacles containing liquefied
compressed gas by weight.

Section 178.35

Section 178.35(f) prescribes the marking requirements that apply to
DOT-specification cylinders. In this NPRM, we propose to add new
paragraph (f)(7) to Sec. 178.35 to require that cylinder tare weight
or mass weight, and water capacity, be marked on certain DOT-
specification cylinders filled by weight.

Sections 178.36, 178.37, 178.38, 178.39, 178.42, 178.44, 178.45,
178.46, 178.47, 178.50, 178.51, 178.53, 178.55 178.56, 178.57, 178.58,
178.59, 178.60, 178.61, 178.65, and 178.68

These sections prescribe the DOT-specification requirements for a
cylinder type including the performance standards for pressure testing
of the cylinder. In this NPRM, we propose to require that testing and
equipment used to conduct the pressure testing be in conformance with
CGA C-1, Methods for Pressure Testing Compressed Gas Cylinders, to
provide for consistency and clarity in performance of pressure testing.
We also propose to revise the format of the pressure testing paragraphs
for greater consistency.

Sections 178.50, 178.51, 178.61, and 178.68

These sections prescribe DOT 4-series specification requirements.
These specifications are often unclear to manufacturers and enforcement
personnel. In this NPRM, we propose to revise the specification
requirements to promote consistent and uniform manufacturing practices
for DOT 4-series cylinders.

Section 178.70

Section 178.70(d) prescribes the requirements to obtain design
approval of a UN pressure receptacle. In this NPRM, we propose to
revise paragraph (d) to include language that an approval for a design
modification is not required if the specific design modification is

[[Page 48995]]

covered under the UN/ISO standard for the design type already approved.

Section 180.203

Section 180.203 prescribes definitions that apply to the
qualification, maintenance, and use of cylinders under the HMR. In this
NPRM, we propose to add new definitions for the terms or phrases
``accuracy,'' ``accuracy grade,'' ``actual test pressure,''
``calibrated cylinder,'' ``error,'' ``master gauge,'' ``mobile unit,''
``overpressurized,'' ``percent permanent expansion,'' ``precision,''
``proof pressure test,'' ``reference gauge,'' and ``service pressure'';
and revise the definitions for ``commercially free of corrosive
components,'' ``defect,'' and ``test pressure.'' These proposed
definitions will clarify the cylinder requirements prescribed in 49 CFR
part 180, subpart C.

Section 180.205

Section 180.205 prescribes the general requirements for
requalifying DOT-specification cylinders. In this NPRM, we propose to
revise and add new regulatory text for clarity. Specifically, we
propose to clarify the conditions requiring test and inspection of
cylinders under paragraph (d) by including a reference to evidence of
grinding; revise the paragraph (f) visual inspection requirements to
include reference to shot blasting and ``chasing'' of cylinders;
clarify and revise the paragraph (g) retest equipment tolerances for
consistency with ISO standards 6406 and 10461 (i.e., standards for
periodic inspection and testing of gas cylinders) which are both
incorporated by reference in the HMR in Sec. 180.207 to allow for
broader use of retest equipment (we invite comment on this course of
action relative to the tolerances provided for in CGA C-1); revise the
paragraph (i) cylinder condemnation requirements to clarify the
responsibilities of the requalifier and add conditions under which a
cylinder must be condemned; and include a reference to training
materials, under new paragraph (j), that are suitable for training
persons who requalify cylinders using the volumetric expansion test
method.

Section 180.207

Section 180.207 prescribes requirements for requalifying UN
pressure receptacles. In this NPRM, we propose to revise and add new
regulatory text for clarity. Specifically, we propose to clarify the
language prohibiting the use of a UN pressure receptacle beyond its
service life by, for example, removing approval authorization language;
to revise the requalification procedures for seamless steel cylinders
to include MEGC pressure receptacles larger than 150 liters water
capacity; and to revise the requalification schedule for dissolved
acetylene UN cylinders to be requalified no sooner than five years and
no later than ten years from the date of manufacture.

Section 180.209

Section 180.209 prescribes requirements for requalifying
specification cylinders. In this NPRM, we propose to revise and add new
regulatory text for clarity; and to incorporate the current version of
CGA C-1, Methods for Pressure Testing Compressed Gas Cylinders.
Specifically, we propose to revise the paragraph (a) table 1 to include
reference to the paragraph (e) conditions for an alternate
requalification period; the paragraph (b) conditions for star-marking
of a DOT 3A or 3AA cylinder; and the paragraph (m) requalification
conditions for DOT 3AL cylinders made of 6351-T6 aluminum alloy.

Section 180.211

Section 180.211 prescribes requirements to repair, rebuild, and
reheat treat DOT-4 series specification cylinders. In this NPRM, we
propose to clarify that the requirements to repair DOT 4L cylinders in
paragraph (c) of this section are for rebuilding the cylinders and to
clarify paragraph (e) for when a hydrostatic test may be performed on
the inner containment vessel of a DOT 4L welded insulated cylinder. We
do not propose in this NPRM to add a definition for ``recondition'' to
Sec. 180.203 because of our concern that adding this definition for
only DOT 4L cylinders might cause further confusion and reduce safety.

Section 180.212

Section 180.212(a) prescribes requirements to repair seamless DOT
3-series specification cylinders and seamless UN pressure receptacles.
In this NPRM, we propose to require an ultrasonic examination on DOT 3-
series cylinders and seamless UN pressure receptacles after any
grinding is performed on these cylinders.

Section 180.213

Section 180.213 prescribes requirements for marking DOT-
specification cylinders and UN pressure receptacles that are
successfully requalified. In this NPRM, we propose to revise the
requalification marking method to clarify the steps involved and that
stamping the sidewall of the cylinder is prohibited. Additionally, we
propose to clarify the marking requirements for foreign cylinders
filled for export under paragraph (d) and to include two new marking
requirements under paragraph (f) for designation of grinding with
ultrasonic wall thickness examination and for designation of
requalification of a foreign cylinder requalified in conformance with
Sec. Sec. 171.23(a)(4) and 180.209(l) of this subchapter. Finally, we
propose to add visual inspection identifier number marking requirements
under a new paragraph (g).

Section 180.215

Section 180.215 prescribes reporting and retention requirements for
a person who requalifies, repairs, or rebuilds cylinders. In this NPRM,
we propose to clarify what information these documents must contain.

49 CFR Part 180, Appendix C

Part 180, appendix C prescribes the requirements eddy current
examination equipment must meet to inspect DOT 3AL, 6351-T6 aluminum
alloy cylinders. In this NPRM, we propose to retitle the appendix and
revise paragraph 1 for clarity regarding equipment calibration
procedures when conducting eddy current examination.

VII. Regulatory Analyses and Notices

A. Statutory/Legal Authority for This NPRM

Federal Hazardous Materials Transportation Law (49 U.S.C. 5101-
5128) authorizes the Secretary of Transportation to ``prescribe
regulations for the safe transportation, including security, of
hazardous material in intrastate, interstate, and foreign commerce.''
Section 5117(a) authorizes the Secretary to issue a special permit
exempting compliance with a regulation prescribed in Sec. Sec.
5103(b), 5104, 5110, or 5112 ``to a person transporting, or causing to
be transported, hazardous material in a way that achieves a safety
level at least equal to the safety level required under [the Federal
hazmat law], or consistent with the public interest . . . if a required
safety level does not exist.'' The issues described in this NPRM
respond to 20 outstanding petitions for rulemaking.

B. Executive Order 12866, Executive Order 13563, and DOT Regulatory
Policies and Procedures

This NPRM is not considered a significant regulatory action under
section 3(f) of Executive Order 12866 (``Regulatory Planning and
Review'') and was not reviewed by the Office of Management and Budget
(OMB).

[[Page 48996]]

Neither was it considered a significant rule under the Regulatory
Policies and Procedures order issued by the Department of
Transportation [44 FR 11034].
Executive Order 13563 (``Improving Regulation and Regulatory
Review'') is ``supplemental to and reaffirms the principles,
structures, and definitions governing regulatory review that were
established in Executive Order 12866 of September 30, 1993.'' In
addition, Executive Order 13563 specifically requires agencies to: (1)
Involve the public in the regulatory process; (2) promote
simplification and harmonization through interagency coordination; (3)
``identify and consider regulatory approaches that reduce burdens and
maintain flexibility''; (4) ensure the objectivity of any scientific or
technological information used to support regulatory action; and (5)
consider how to best promote retrospective analysis to modify,
streamline, expand, or repeal existing rules that are outmoded,
ineffective, insufficient, or excessively burdensome.
PHMSA has involved the public in the regulatory process by (1)
addressing issues identified for possible future rulemaking in letters
of interpretation and other correspondence, and (2) responding to 20
petitions for rulemaking submitted by stakeholders in the compressed
gas industry in conformance with 49 CFR 106.95. Overall, the issues
discussed in this NPRM promote the continued safe transportation of
hazardous materials while producing a net benefit.
These petitions clarify the existing regulatory text in the HMR,
incorporate widely used industry publications, and address specific
safety concerns, thus enhancing the safe transportation of compressed
gases while limiting the impact on the regulated community.
Incorporating the provisions of special permits into regulations with
general applicability will provide shippers and carriers with
additional flexibility to comply with established safety requirements,
thereby reducing burdens and costs and increasing productivity.
Further, PHMSA on its own initiative is clarifying existing
regulatory language to reduce misunderstandings that will thereby
improve safety. Some of the proposed changes are summarized below, by
topic.
Incorporating Updated CGA C-6, Visual Inspection of Steel Cylinders
PHMSA proposes to replace the currently incorporated Seventh
Edition of the CGA publication C-6, Standards for Visual Inspection of
Steel Compressed Gas Cylinders with the revised Eleventh Edition and
update the appropriate references throughout the HMR.
Under the HMR, compressed gas cylinders must be visually inspected
as part of the requalification process once every five years. CGA C-6
serves as a guide to cylinder requalifiers and users for establishing
cylinder inspection procedures and standards. The Tenth Edition
provides updated and enhanced guidance on the inspection of multi-
element gas containers, cylinder thread inspection for cylinders used
in corrosive gas service, and clarified maximum allowable depths and
measuring techniques for various types of corrosion.
PHMSA identified approximately 5,000 companies that would be
subject to this standard. The majority of these companies are
classified as small businesses using SBA size standards. This revision
would impose a one-time individual cost for purchase of the updated
standard. We assume that the majority of companies subject to this
standard are non-CGA members or non-CGA subscribers. Assuming
approximately 5,000 companies purchase the Eleventh Edition of CGA-6,
we estimate the upper bound of the total cost across all affected
entities for this proposal would be approximately $710,000.
The benefit of this change is that it would improve the clarity of
industry standards that are currently incorporated by reference. It
facilitates voluntary compliance and reduces the burdens associated
with references to outdated material. PHMSA believes that these changes
may yield an incremental improvement to the overall safety of hazmat
cylinder transportation. In comments made to the ANPRM, five
stakeholders support the proposal to update the IBR of CGA C-6 to the
Tenth Edition. No commenters objected to the proposal or provided
benefit data.
Incorporating CGA C-1 Methods of Pressure Testing Compressed Gas
Cylinders Into the HMR
PHMSA proposes to revise the HMR regarding the retesting of
cylinders using pressure testing. The HMR is often perceived as unclear
on procedures and requirements for pressure testing of cylinders.
Incorporating by reference CGA C-1, Methods for Pressure Testing
Compressed Gas Cylinders clarifies ambiguities in the HMR.
It is estimated that this would affect approximately 980 entities
that conduct pressure testing, including cylinder requalifiers,
retesters, and manufacturers. PHMSA estimates a one-time compliance
cost of $186 for each entity purchasing the Eleventh Edition of CGA C-
1. The upper bound of the total cost across all affected entities for
this proposal would be approximately $182,280. Actual costs are
expected to be lower, as some of the 980 entities may be members,
subscribers, or already own the revised edition. Revising the HMR to
incorporate CGA C-1 would increase clarity, reduce confusion, provide
enhanced guidance, and provide marginal safety benefits without
imposing requirements that are potentially costly or difficult.
Weight Marking Requirements for Filling of DOT 4-Series Specification
Cylinders
PHMSA proposes to require newly manufactured DOT 4B, 4BA, 4BW, and
4E cylinders to be marked with the tare weight or the mass weight and
the water capacity. Accurate cylinder tare weight, or mass weight, and
water capacity are crucial for safe filling and transportation of
cylinders containing liquefied compressed gas. Overfilled cylinders
have the potential for leakage and possible failure during transport.
PHMSA identified six U.S. based manufacturers of the cylinders.
Five of these companies are classed as small businesses using SBA size
standards. The HMR already incorporate by reference NFPA 58, LP Gas
Code, which requires cylinders used for liquefied petroleum gases to be
marked with the tare weight and water capacity. The NFPA 58 does not
specify how the cylinders must be marked, nor does it specify by whom.
Further, NFPA 58 only addresses liquefied petroleum gas, not all
liquefied compressed gases. We do not anticipate significant additional
costs to DOT 4-series-specification cylinders, manufacturers, or
owners, because many in the liquefied compressed gas industry already
request that manufacturers mark cylinders with this additional
information as an added safety measure.
Clarify Filling Limits on Multiple Element Gas Containers
PHMSA proposes to clarify filling limits for a liquefied compressed
gas in a manifold comprised of DOT-specification cylinders or a
multiple element gas container (MEGC). Specifically, liquefied
compressed gases contained in manifold cylinders cannot exceed the
filling densities specified in Sec. 173.304a(a)(2) and liquefied gases
in MEGCs comprised of UN pressure receptacles must not exceed the
values contained in P200 as specified in Sec. 173.304b.
This proposed change will remove the discrepancy between the set
pressure

[[Page 48997]]

specified in CGA S-1.1 and the differing set pressures prescribed in
Sec. Sec. 173.302(f)(2) and 173.304(f)(2). This revision would not
impose any new costs on affected industries, and although the proposed
revision restates a requirement from another section in the HMR, we
believe it would provide additional protection against overfilling of a
cylinder. This change would promote regulatory compliance and foster
safe filling practices.

C. Executive Order 13132

This proposed rule has been analyzed in accordance with the
principles and criteria contained in Executive Order 13132
(``Federalism'') and the President's memorandum (``Preemption'') that
was published in the Federal Register on May 22, 2009 [74 FR 24693].
This proposed rule will preempt State, local, and Native America tribal
requirements but does not propose any regulation that has substantial
direct effects on the States, the relationship between the national
government and the States, or the distribution of power and
responsibilities among the various levels of government. Therefore, the
consultation and funding requirements of Executive Order 13132 do not
apply.
The Federal Hazardous Materials Transportation Law, 49 U.S.C. 5101-
5128, contains an express preemption provision [49 U.S.C. 5125 (b)]
that preempts State, local, and Native American tribal requirements on
the following subjects:
(1) The designation, description, and classification of hazardous
materials;
(2) The packing, repacking, handling, labeling, marking, and
placarding of hazardous materials;
(3) The preparation, execution, and use of shipping documents
related to hazardous materials and requirements related to the number,
contents, and placement of those documents;
(4) The written notification, recording, and reporting of the
unintentional release in transportation of hazardous material; and
(5) The design, manufacture, fabrication, marking, maintenance,
recondition, repair, or testing of a packaging or container
represented, marked, certified, or sold as qualified for use in
transporting hazardous material.
PHMSA invites those with an interest in the issues presented in
this NPRM to comment on the effect the adoption of specific proposals
may have on State or local governments.

D. Executive Order 13175

This NPRM was analyzed in accordance with the principles and
criteria contained in Executive Order 13175 (``Consultation and
Coordination with Indian Tribal Governments''). Because this NPRM does
not have tribal implications and does not impose substantial direct
compliance costs on Native American tribal governments, the funding and
consultation requirements of Executive Order 13175 do not apply, and a
tribal summary impact statement is not required. We invite Native
American tribal governments to provide comments on the effect the
adoption of specific proposals may have on Indian communities.

E. Regulatory Flexibility Act, Executive Order 13272, and DOT
Procedures and Policies

The Regulatory Flexibility Act (5 U.S.C. 601 et seq.) requires an
agency to review regulations to assess their impact on small entities
unless the agency determines that a rule is not expected to have a
significant impact on a substantial number of small entities. The term
``small entities'' comprises small businesses and not-for-profit
organizations that are independently owned and operated and are not
dominant in their fields and governmental jurisdictions with
populations of less than 50,000. (See 5 U.S.C. 601.) This notice has
been developed in accordance with Executive Order 13272 (``Proper
Consideration of Small Entities in Agency Rulemaking'') and DOT's
Policies and Procedures to promote compliance with the Regulatory
Flexibility Act to ensure that potential impacts of draft rules on
small entities are properly considered. Section 603(b) of the
Regulatory Flexibility Act requires an analysis of the possible impact
of the proposed rule on small entities, including the need for the
rule, the description of the action, the identification of potentially
affected small entities, the reporting and recordkeeping requirements,
the related Federal rules and regulations, and the alternative
proposals considered. Such analysis for this NPRM is as follows:
1. Need for the NPRM
Current requirements for the manufacture, use, and requalification
of cylinders can be traced to standards first applied in the early
1900s. Over the years, the regulations have been revised to reflect
advancements in transportation efficiency and changes in the national
and international economic environment. This NPRM is part of a
retrospective analysis to modify and streamline existing requirements
that are outmoded, ineffective, insufficient, or excessively
burdensome. This rulemaking also introduces new provisions suggested or
developed by industry representatives, industry groups that develop
standards, or international regulatory bodies.
2. Description of Action
This NPRM considers incorporating the provisions of one special
permit, responds to 20 petitions for rulemaking, considers clarifying
other requirements in the HMR, and addresses areas of concern that are
currently left out of the HMR. The amendments discussed in this NPRM
are designed to increase flexibility for the regulated community,
promote technological advancement, and facilitate international
transportation while maintaining a comparable level of safety.
3. Identification of Potentially Affected Small Entities
The amendments considered here are likely to affect cylinder
manufacturers (NAICS code 332420; approximately 568 companies);
cylinder requalifiers; independent inspection agencies; commercial
establishments that own and use DOT-specification cylinders and UN
pressure receptacles; and individuals who export non-UN/ISO compressed
gas cylinders (NAICS codes 32512, 336992, 423450, 423850, 423990,
454312, 541380). Nearly all of these companies, particularly cylinder
requalification facilities of which there are approximately 5,000, are
small entities based on the criteria developed by the Small Business
Administration.
4. Reporting and Recordkeeping Requirements
This NPRM does not include any new reporting or recordkeeping
requirements.
5. Related Federal Rules and Regulations
The Occupational Safety and Health Administration (OSHA) prescribes
requirements for the use, maintenance, and testing of portable fire
extinguishers in 29 CFR 1910.157 and requirements for fixed fire
suppression systems in 29 CFR 1910.160. The issues discussed in this
NPRM pertaining to the transportation of fire extinguishers and
compressed gas cylinders that are a component of a fixed fire
suppression system do not conflict with the requirements in 29 CFR.
With respect to the transportation of compressed gases in cylinders,
there are not related rules or regulations issued by other

[[Page 48998]]

departments or agencies of the Federal government.
6. Alternative Proposals for Small Business
Certain regulatory actions may affect the competitive situation of
an individual company or group of companies by imposing relatively
greater burdens on small, rather than large, enterprises. PHMSA
requests comments from small entities on the impacts of these
additional requirements.
7. Conclusion
This NPRM requests information that will be used to develop a
proposal to amend provisions of the HMR addressing the manufacture,
maintenance, and use of cylinders. PHMSA anticipates that the proposals
in this NPRM will reduce burdens for most persons and any costs
resulting from adoption of new requirements will be offset by the
benefits derived from eliminating the need to apply for special
permits, increasing regulatory flexibility, and improving safety
through enhanced compliance. If your business or organization is a
small entity and the adoption of the proposals contained in this NPRM
could have a significant economic impact on your operations, please
submit a comment explaining how and to what extent your business or
organization could be affected.

F. Paperwork Reduction Act

This NPRM does not impose new information collection requirements.
Depending on the results of our request for comments to this NPRM,
there may be a decrease in the annual burden and costs under OMB-
proposed changes to incorporate provisions contained in certain widely
used or longstanding special permits with an established safety record.
PHMSA specifically requests comments on the information collection
and recordkeeping burdens associated with developing, implementing, and
maintaining these requirements for approval under this NPRM.
Address written comments to the Dockets Unit as identified in the
ADDRESSES section of this NPRM. We must receive comments regarding
information collection burdens prior to the close of the comment period
identified in the DATES section of this NPRM.

G. Regulation Identifier Number (RIN)

A regulation identifier number (RIN) is assigned to each regulatory
action listed in the Unified Agenda of Federal Regulations. The
Regulatory Information Service Center publishes the Unified Agenda in
April and October of each year. The RIN contained in the heading of
this document may be used to cross-reference this action with the
Unified Agenda.

H. Unfunded Mandates Reform Act of 1995

This NPRM does not impose unfunded mandates under the Unfunded
Mandates Reform Act of 1995. It does not result in costs of $141.3
million or more to either State, local, or tribal governments, in the
aggregate, or to the private sector and is the least burdensome
alternative that achieves the objective of the rule. Further, in
compliance with the Unfunded Mandates Reform Act of 1995, PHMSA will
evaluate any regulatory action that might be proposed in subsequent
stages of the proceeding to assess the effects on State, local, and
tribal governments and the private sector.

I. Environmental Assessment

The National Environmental Policy Act of 1969 (NEPA), as amended
(42 U.S.C. 4321-4347), and implementing regulations by the Council on
Environmental Quality (CEQ) (40 CFR part 1500) require Federal agencies
to consider the consequences of major Federal actions and prepare a
detailed statement on actions that significantly affect the quality of
the human environment. The CEQ regulations require Federal agencies to
conduct an environmental review considering: (1) The need for the
proposed action; (2) alternatives to the proposed action; (3) probable
environmental impacts of the proposed action and alternatives; and (4)
the agencies and persons consulted during the consideration process.
1. Need for the Action
This NPRM responds to 20 petitions for rulemaking submitted by the
regulated community and seeks comment on incorporating the provisions
of one special permit. The issues discussed in this NPRM would, if
eventually adopted, update and expand the use of currently authorized
industry consensus standards; revise the construction, marking, and
testing requirements of DOT 4-series cylinders; clarify the filling
requirements for cylinders; discuss the handling of cylinders used in
fire suppression systems; and revise the requalification and
condemnation requirements for cylinders.
This NPRM discusses the following amendments to the HMR:
Replace the currently incorporated Seventh Edition of the
CGA's publication C-6 Standards for Visual Inspection of Steel
Compressed Gas Cylinders with the revised Tenth Edition and update the
appropriate references throughout the HMR.
Revise the manufacturing requirements for certain DOT-4
series cylinders.
Revise the requirements for the requalification of DOT-
specification cylinders by pressure testing found in 49 CFR part 180,
subpart C.
Allow the use of the labels described in the Eighth
Edition of CGA's publication C-7 Guide to the Preparation of
Precautionary Labeling and Marking of Compressed Gas Containers
(currently IBR in the HMR) appendix A on cylinders contained in
overpacks.
Require manufacturers to mark newly manufactured cylinders
suitable for the transport of liquefied compressed gas with the mass
weight or tare weight, and water capacity.
Allow non-specification cylinders used in a fixed fire
suppression system to be transported under the same exceptions as those
provided for fire extinguishers.
Permit use of the OVERPACK marking for cylinders packed in
conformance with Sec. 173.301(a)(9).
Clarify filling limits for a liquefied compressed gas in a
manifold or a multiple element gas container (MEGC).
Clarify the requirements for filling non-specification
cylinders for export or use on board a vessel.
Add requirements for DOT-specification cylinders used to
transport adsorbed gases.
2. Alternatives Considered
Alternative (1): Do nothing. Our goal is to update, clarify, and
provide relief from certain existing regulatory requirements to promote
safer transportation practices, eliminate unnecessary regulatory
requirements, and facilitate international commerce. We rejected the
do-nothing alternative.
Alternative (2): Preferred choice. With this alternative, PHMSA
will publish an NPRM seeking public comment on the issues raised in 20
petitions for rulemaking and the incorporation of one special permit;
review the comments received on the amendments described in the ANPRM
and their potential economic and safety implications; and use these
comments to craft more specific proposals that are published in this
NPRM. This is the selected alternative.

[[Page 48999]]

3. Environmental Impacts
Hazardous materials are substances that may pose a threat to public
safety or the environment during transportation because of their
physical, chemical, or nuclear properties. The hazardous materials
regulatory system is a risk management system that is prevention-
oriented and focused on identifying a safety hazard and reducing the
probability and quantity of a hazardous material release. Hazardous
materials are categorized by hazard analysis and experience into hazard
classes and packing groups. The regulations require each shipper to
classify a material in accordance with these hazard classes and packing
groups. The process of classifying a hazardous material is itself a
form of hazard analysis. Further, the regulations require the shipper
to communicate a material's hazards through the use of hazard class,
packing group, and proper shipping name on the shipping paper and the
use of labels on packages and placards on transport vehicles. Thus, the
shipping paper, labels, and placards communicate the most significant
findings of the shipper's hazard analysis. A hazardous material is
assigned to one of three packing groups based upon its degree of
hazard, from a high hazard material (Packing Group I) to a low hazard
material (Packing Group III). The quality, damage resistance, and
performance standards of the packaging in each packing group are
appropriate for the hazards of the material transported.
Under the HMR, hazardous materials are transported by aircraft,
vessel, rail, and highway. The potential for environmental damage or
contamination exists when packages of hazardous materials are involved
in accidents or en route incidents resulting from cargo shifts, valve
failures, package failures, loading, unloading, collisions, handling
problems, or deliberate sabotage. The release of hazardous materials
can cause the loss of ecological resources (e.g., wildlife habitats)
and the contamination of air, aquatic environments, and soil.
Contamination of soil can lead to the contamination of ground water.
Compliance with the HMR substantially reduces the possibility of
accidental release of hazardous materials.
It is anticipated that the petitions and special permits discussed
in this NPRM if adopted in a future rulemaking, would have minimal, if
any, environmental consequences.
4. Agencies Consulted
Occupational Safety and Health Administration
National Institute of Standards and Technology
U.S. Environmental Protection Agency
5. Conclusion
PHMSA has conducted a technical review of the amendments discussed
in this NPRM and determined that the amendments considered would
provide protection against the release of hazardous materials based on
sound scientific methods and would not result in unusual stresses on
the cylinder or adversely impact human health or the environment. PHMSA
welcomes any data or information related to environmental impacts, both
positive and negative, that may result from a future rulemaking
addressing the issues discussed in this NPRM.

J. Privacy Act

In accordance with 5 U.S.C. 553(c), DOT solicits comments from the
public to better inform its rulemaking process. DOT posts these
comments, without edit, including any personal information the
commenter provides, to www.regulations.gov, as described in the system
of records notice (DOT/ALL-14 FDMS), which can be reviewed at
www.dot.gov/privacy.

K. International Trade Analysis

The Trade Agreements Act of 1979 (Pub. L. 96-39), as amended by the
Uruguay Round Agreements Act (Pub. L. 103-465), prohibits Federal
agencies from establishing any standards or engaging in related
activities that create unnecessary obstacles to the foreign commerce of
the United States. Pursuant to these Acts, the establishment of
standards is not considered an unnecessary obstacle to the foreign
commerce of the United States, so long as the standards have a
legitimate domestic objective, such as the protection of safety, and do
not operate in a manner that excludes imports that meet this objective.
The statute also requires consideration of international standards and,
where appropriate, that they be the basis for U.S. standards. PHMSA
notes the purpose is to ensure the safety of the American public and
has assessed the effects of this NPRM to ensure that it does not
exclude imports that meet this objective. As a result, this NPRM is not
considered as creating an unnecessary obstacle to foreign commerce.

List of Subjects

49 CFR Part 107

Administrative practice and procedure, Hazardous materials
transportation, Penalties, Reporting and recordkeeping requirements.

49 CFR Part 171

Exports, Hazardous materials transportation, Hazardous waste,
Imports, Incorporation by reference, Reporting and recordkeeping
requirements.

49 CFR Part 172

Education, Hazardous materials transportation, Hazardous waste,
Incorporation by reference, Labeling, Markings, Packaging and
containers, Reporting and recordkeeping requirements.

49 CFR Part 173

Hazardous materials transportation, Incorporation by reference,
Packaging and containers, Radioactive materials, Reporting and
recordkeeping requirements, Uranium.

49 CFR Part 178

Hazardous materials transportation, Incorporation by reference,
Motor vehicle safety, Packaging and containers, Reporting and
recordkeeping requirements.

49 CFR Part 180

Hazardous materials transportation, Motor carriers, Motor vehicle
safety, Packaging and containers, Railroad safety, Reporting and
recordkeeping requirements.

In consideration of the foregoing, PHMSA is proposing to amend 49
CFR Chapter I as follows:

PART 107--HAZARDOUS MATERIALS PROGRAM PROCEDURES

0
1. The authority citation for part 107 continues to read as follows:

Authority: 49 U.S.C. 5101-5128, 44701; Pub. L. 101-410 section
4 (28 U.S.C. 2461 note); Pub. L. 104-121, sections 212-213; Pub. L.
104-134, section 31001; Pub. L. 112-141 section 33006; 49 CFR 1.81
and 1.97.

0
2. In Sec. 107.803, revise paragraph (c)(3) to read as follows:

Sec. 107.803 Approval of an independent inspection agency (IIA).

* * * * *
(c) * * *
(3) Detailed description of the applicant's qualifications and
ability to perform the inspections and to verify the inspections
required by part 178 and part 180 of this chapter; or those required
under the terms of a special permit issued under this part.
* * * * *
0
3. In Sec. 107.805, revise paragraphs (c)(3) and (c)(4), and add
paragraph (c)(5) to read as follows:

[[Page 49000]]

Sec. 107.805 Approval of cylinder and pressure receptacle
requalifiers.

* * * * *
(c) * * *
(3) A certification that the facility will operate in compliance
with the applicable requirements of subchapter C of this chapter;
(4) The signature of the person making the certification and the
date on which it was signed; and
(5) For a mobile unit operation (as defined in Sec. 180.203 of
subchapter C of this chapter), the type of equipment to be used, the
specific vehicles to be used, the geographic area the applicant is
requesting to operate within, and any differences between the mobile
operation and the facility operation as described under paragraph
(c)(2) of this section.
* * * * *

PART 171--GENERAL INFORMATION, REGULATIONS, AND DEFINITIONS

0
4. The authority citation for part 171 continues to read as follows:

Authority: 49 U.S.C. 5101-5128, 44701; Pub. L. 101-410 section
4 (28 U.S.C. 2461 note); Pub. L. 104-121, sections 212-213; Pub. L.
104-134, section 31001; 49 CFR 1.81 and 1.97.

0
5. In Sec. 171.7, revise paragraphs (g)(1) and (n) to read as follows:

Sec. 171.7 Reference material.

* * * * *
(g) * * *
(1) 2015 ASME Boiler and Pressure Vessel Code (ASME Code), 2015
Edition, July 1, 2015 (as follows), into Sec. Sec. 172.102; 173.3;
173.5b; 173.24b; 173.302d; 173.306; 173.315; 173.318; 173.420; 178.255-
1; 178.255-2; 178.255-14; 178.255-15; 178.273; 178.274; 178.276;
178.277; 178.320; 178.337-1; 178.337-2; 178.337-3; 178.337-4; 178.337-
6; 178.337-16; 178.337-18; 178.338-1; 178.338-2; 178.338-3; 178.338-4;
178.338-5; 178.338-6; 178.338-13; 178.338-16; 178.338-18; 178.338-19;
178.345-1; 178.345-2; 178.345-3; 178.345-4; 178.345-7; 178.345-14;
178.345-15; 178.346-1; 178.347-1; 178.348-1; 179.400-3; 180.407.
* * * * *
(n) Compressed Gas Association (CGA), 1235 Jefferson Davis Highway,
Arlington, VA 22202.
(1) CGA C-1, Methods for Pressure Testing Compressed Gas Cylinders,
2016, into Sec. Sec. 178.36, 178.37, 178.38, 178.39, 178.42, 178.44,
178.45, 178.46, 178.47; 178.50; 178.51; 178.53; 178.55; 178.56; 178.57;
178.58; 178.59; 178.60; 178.61; 178.65; 178.68; 180.205, 180.209.
(2) CGA C-3, Standards for Welding on Thin-Walled Steel Cylinders,
2005 (Reaffirmed 2011), into Sec. Sec. 178.47; 178.50; 178.51; 178.53;
178.55; 178.56; 178.57; 178.58; 178.59; 178.60; 178.61; 178.65; 178.68;
180.211.
(3) CGA C-5, Cylinder Service Life--Seamless Steel High Pressure
Cylinders, 1991 (Reaffirmed 1995), into Sec. 173.302a and 180.209.
(4) CGA C-6, Standards for Visual Inspection of Steel Compressed
Gas Cylinders, 2013, into Sec. Sec. 172.102, 173.3, 173.198, 173.302d,
180.205, 180.209, 180.211, 180.411, 180.519.
(5) CGA C-6.1, Standards for Visual Inspection of High Pressure
Aluminum Compressed Gas Cylinders, 2002, into Sec. Sec. 180.205;
180.209.
(6) CGA C-6.2, Guidelines for Visual Inspection and Requalification
of Fiber Reinforced High Pressure Cylinders, 1996, into Sec. 180.205.
(7) CGA C-6.3, Guidelines for Visual Inspection and Requalification
of Low Pressure Aluminum Compressed Gas Cylinders, 1991, into
Sec. Sec. 180.205; 180.209.
(8) CGA C-7, Guide to Preparation of Precautionary Labeling and
Marking of Compressed Gas Containers, Appendix A, issued 2004, into
Sec. 172.400a.
(9) CGA C-8, Standard for Requalification of DOT-3HT Cylinder
Design, 1985, into Sec. Sec. 180.205; 180.209.
(10) CGA C-11, Recommended Practices for Inspection of Compressed
Gas Cylinders at Time of Manufacture, 2001, into Sec. 178.35.
(11) CGA C-12, Qualification Procedure for Acetylene Cylinder
Design, 1994, into Sec. Sec. 173.301; 173.303; 178.59; 178.60.
(12) CGA C-13, Guidelines for Periodic Visual Inspection and
Requalification of Acetylene Cylinders, 2000, into Sec. Sec. 173.303;
180.205; 180.209.
(13) CGA C-14, Procedures for Fire Testing of DOT Cylinder Pressure
Relief Device Systems, 2005 (Reaffirmed 2010), into Sec. Sec. 173.301;
173.323.
(14) CGA G-1.6, Standard for Mobile Acetylene Trailer Systems,
2011, in Sec. 173.301(g).
(15) CGA G-2.2, Guideline Method for Determining Minimum of 0.2%
Water in Anhydrous Ammonia, 1985, Reaffirmed 1997, into Sec. 173.315.
(16) CGA G-4.1, Cleaning Equipment for Oxygen Service, 1985, into
Sec. 178.338-15.
(17) CGA P-20, Standard for the Classification of Toxic Gas
Mixtures, 2003, Third Edition, into Sec. 173.115.
(18) CGA S-1.1, Pressure Relief Device Standards--Part 1--Cylinders
for Compressed Gases, (except paragraph 9.1.1), 2011, into Sec. Sec.
173.301; 173.304a; 178.75.
(19) CGA S-1.2, Safety Relief Device Standards Part 2--Cargo and
Portable Tanks for Compressed Gases, 1980, into Sec. Sec. 173.315;
173.318; 178.276; 178.277.
(20) CGA S-7, Method for Selecting Pressure Relief Devices for
Compressed Gas Mixtures in Cylinders, 2005, into Sec. 173.301.
(21) CGA TB-2, Guidelines for Inspection and Repair of MC-330 and
MC-331 Cargo Tanks, 1980, into Sec. Sec. 180.407; 180.413.
(22) CGA TB-25, Design Considerations for Tube Trailers, 2008, into
Sec. 173.301.
* * * * *
0
6. In Sec. 171.23, revise paragraph (a)(4)(i) to read as follows:

Sec. 171.23 Requirements for specific materials and packagings
transported under the ICAO Technical Instructions, IMDG Code, Transport
Canada TDG Regulations, or the IAEA Regulations.

* * * * *
(a) * * *
(4) * * *
(i) The cylinder has been requalified and marked in accordance with
subpart C of part 180 of this subchapter, or has been requalified as
authorized by the Associate Administrator;
* * * * *

PART 172--HAZARDOUS MATERIALS TABLE, SPECIAL PROVISIONS, HAZARDOUS
MATERIALS COMMUNICATIONS, EMERGENCY RESPONSE INFORMATION, TRAINING
REQUIREMENTS, AND SECURITY PLANS

0
7. The authority citation for part 172 continues to read as follows:

Authority: 49 U.S.C. 5101-5128, 44701; 49 CFR 1.81, 1.96 and
1.97.

0
8. In Sec. 172.400a, revise paragraph (a)(1) to read as follows:

Sec. 172.400a Exceptions from labeling.

* * * * *
(a) * * *
(1) A Dewar flask meeting the requirements in Sec. 173.320 of this
subchapter, or a cylinder containing a Division 2.1, 2.2, or 2.3
material, that is durably and legibly marked in conformance with CGA C-
7, appendix A (IBR; see Sec. 171.7 of this subchapter). However, if
overpacked, marking (or appropriate labels) must be communicated on the
exterior of the overpack unless visible from the outside in accordance
with Sec. 173.25 of this subchapter.
* * * * *

[[Page 49001]]

PART 173--SHIPPERS--GENERAL REQUIREMENTS FOR SHIPMENTS AND
PACKAGINGS

0
9. The authority citation for part 173 continues to read as follows:

Authority: 49 U.S.C. 5101-5128, 44701; 49 CFR 1.81, 1.96 and
1.97.

0
10. In Sec. 173.3, revise paragraph (d)(1) to read as follows:

Sec. 173.3 Packaging and exceptions.

* * * * *
(d) * * *
(1) Except for Class 1, Class 7, or acetylene material, a cylinder
containing a hazardous material may be overpacked in a salvage
cylinder.
* * * * *
0
11. In Sec. 173.301:
0
a. Revise paragraphs (a)(9) and (f)(4); and
0
b. In paragraphs (c) and (f), replace ``9.1.1.1'' with ``9.1.1'' in
each place it appears.
The revision reads as follows:

Sec. 173.301 General requirements for shipment of compressed gases
and other hazardous materials in cylinders, UN pressure receptacles and
spherical pressure vessels.

(a) * * *
(9) Specification 2P, 2Q, 3E, 3HT, spherical 4BA, 4D, 4DA, 4DS, and
39 cylinders must be packed in strong non-bulk outer packagings. The
outside of the combination package must be marked with an indication
that the inner packagings conform to the prescribed specifications.
Except for Specification 2P and 2Q containers, the ``OVERPACK'' marking
in accordance with Sec. 173.25(a)(3) of this part may be used to
satisfy the marking requirement of this paragraph. Display of the
``OVERPACK'' marking is not an indication that this combination package
is an overpack.
* * * * *
(f) * * *
(4) DOT 39 cylinders. (i) A pressure relief device is required on a
DOT 39 cylinder regardless of cylinder size or filled pressure.
(ii) A DOT 39 cylinder used for liquefied Division 2.1 materials
must be equipped with a metal pressure relief device.
(iii) Fusible pressure relief devices are not authorized on a DOT
39 cylinder containing a liquefied gas.
(iv) Notwithstanding the requirements of paragraph (f)(1) of this
section with respect to the minimum burst pressure of pressure relief
devices, a pressure relief device on a DOT 39 cylinder used to
transport compressed or liquefied oxidizing gases may have a minimum
burst pressure within the range prescribed in Sec. Sec. 173.302(f)(2)
or 173.304(f)(2), as appropriate.''
* * * * *
0
12. In Sec. 173.302, revise paragraph (a)(2) to read as follows:

Sec. 173.302 Filling of cylinders with nonliquefied (permanent)
compressed gases or adsorbed gases.

(a) * * *
(2) Adsorbed gas. A cylinder filled with an adsorbed gas must be
offered for transportation in conformance with the requirements of
paragraph (d) of this section and Sec. 173.301 of this subpart. In
addition, UN pressure receptacles must meet the requirements in
Sec. Sec. 173.301b, 173.302b, and 173.302c of this subpart, as
applicable, and DOT-specification cylinders must meet the requirements
of Sec. Sec. 173.301a, 173.302a and 173.302d, as applicable, of this
subpart. Where more than one section applies to a cylinder, the most
restrictive requirements must be followed.
* * * * *
0
13. In Sec. 173.302a, revise paragraph (a)(3) to read as follows:

Sec. 173.302a Additional requirements for shipment of nonliquefied
(permanent) compressed gases in specification cylinders.

(a) * * *
(3) DOT 39 cylinders. When the cylinder is filled with a Division
2.1 flammable gas, the internal volume of the cylinder may not exceed
1.25 L (75 in\3\). For chemical under pressure (see Sec. 172.102,
special provision 362 of this subchapter), the internal volume may not
exceed 50 L (3050 in\3\).
* * * * *
0
14. Add Sec. 173.302d to read as follows:

Sec. 173.302d Additional requirements for the shipment of adsorbed
gases in DOT-specification cylinders.

(a) General. A cylinder filled with an adsorbed gas must be offered
for transportation in DOT-specification cylinders subject to the
requirements in this section, and Sec. Sec. 173.301 and 173.302 of
this subpart.
(b) Packaging. (1) DOT-3E1800, DOT-3AA2015, and DOT-3AA2265
cylinders must be used with a capacity between 0.4 and 7.3 liters.
(2) Each cylinder authorized by this section must remain in
dedicated product service for its entire life.
(3) The maximum pressure inside each cylinder must be 0 psig at
70[emsp14][deg]F and 30 psig at 140[emsp14][deg]F.
(4) The contents of the cylinders must be limited in pressure and
volume so that if totally discharged into the overpack cylinder, the
pressure in the overpack cylinder will not exceed \5/4\ of the MAWP at
55 [deg]C (131[emsp14][deg]F).
(5) The valve wheel of each cylinder must be secured by a strap
that provides tension in the tightening direction. A plug must be
placed in each valve and the cylinder and valve area must be shrink-
wrapped before being placed in the overpack cylinder. A protective
valve cap must be used on all pressure vessels except the DOT-3E1800
cylinder. Valves on the DOT-3E1800 cylinders must be protected in
conformance with Sec. 173.40(d) of this part.
(6) Prior to each shipment, the leak integrity of the overpack
cylinder must be verified and have a leak rate no greater than 1 x
10^-4 standard atmospheric cubic centimeters per second.
(7) All closures of the overpack cylinder shall have a method to
determine if they have been tampered with during transportation. The
pressure indicating device on the overpack cylinder may be used to
indicate tampering.
(8) The shipper must instruct the carriers to reject or remove the
overpack cylinder from transportation in the event that the pressure
gauge drops below a pressure designated by the shipper.
(9) Each overpack cylinder must be labeled for the hazardous
material it contains.
(10) Adsorbent material. Each cylinder is filled with a monolith
solid microporous sorbent and/or bead-type sorbent onto which the gas
is adsorbed. The gas remains adsorbed during transportation in
essentially a solid state. The system is filled, operated, and
transported at sub-atmospheric pressures and is described as a sub-
atmospheric gas delivery system (SDS). The gas must be removed from the
SDS using the input of external energy, such as a steady vacuum.
(11) Overpack. (i) Cylinders authorized under this section must be
transported in a non-DOT-specification full-opening, hinged-head or
fully removable head, steel overpack cylinder. The overpack cylinder
must be constructed to Section VIII, Division 1 of the ASME Code (IBR;
see Sec. 171.7 of this subchapter) with a minimum design margin of 4
to 1. The minimum MAWP must be 75 psig. The maximum water capacity must
be 450 L (119 gallons). The overpack cylinder must not be equipped with
a pressure relief device. The cylinders must be securely positioned
within the overpack to prevent excessive movement. The overpack
cylinder must have gaskets, valves and fittings that are compatible

[[Page 49002]]

with the hazardous materials they contain. The overpack cylinder must
have a pressure gauge clearly visible from the outside. The pressure
gauge must be recessed into the overpack cylinder or otherwise
protected from damage during transportation. The overpack cylinder must
be pressurized to 3-5 psig with inert gas.
(ii) Overpack testing. Each overpack cylinder must be visually
inspected in conformance with CGA C-6 (IBR; see Sec. 171.7 of this
subchapter) at least once every five years. In addition, each overpack
must be pressure tested to a minimum test pressure of at least 1.5
times MAWP. The pressure must be maintained for at least 30 seconds.
The cylinder must be examined under test pressure and removed from
service if a leak or defect is found. The retest and inspection must be
performed by a person trained and experienced in the use of the
inspection and testing equipment.
(iii) Overpack marking. Each overpack cylinder that is successfully
requalified must be durably and legibly marked with the word ``Tested''
followed by the requalification date (month/year). The marking must be
in letters and numbers at least 12 mm (0.5 inches) high. Stamping on
the overpack sidewall is not permitted. The requalification marking may
be placed on any portion of the upper end of the cylinder near the
marking required by the following method, or on a metal plate
permanently secured to the cylinder. The outside of each overpack
cylinder must be plainly and durably marked on any portion of the upper
end with ``OVERPACK CYLINDER'' (in lieu of the ``OVERPACK'' marking
requirement of Sec. 173.25(a)(4) of this part), the proper shipping
name of the hazardous material contained inside the overpack, the name
and address of the consignee or consignor, and the name and address or
registered symbol of the overpack manufacturer.
(iv) Recordkeeping. The person who tested the overpack or that
person's agent must retain a record of the most recent visual
inspection and pressure test of the overpack until the cylinder is
requalified. The records must be made available to a DOT representative
upon request.
(12) Sub-atmospheric gas delivery system (SDS) testing. Each
cylinder, except DOT-3E cylinders, must be retested by persons trained
to perform this procedure. DOT-3AA cylinders must be retested and
marked in conformance with the requirements for DOT-3AA cylinders in 49
CFR part 180 or the requirements of a current DOT special permit for
ultrasonic examination.
(c) Gases. The gases permitted to be transported as adsorbed in
DOT-specification cylinders in conformance with this section are:

----------------------------------------------------------------------------------------------------------------
Proper shipping name/hazardous Hazard class/
materials description division Identification No. Hazard zone
----------------------------------------------------------------------------------------------------------------
Arsine.............................. 2.3 UN 2188..................... Zone A.
Boron Trifluoride................... 2.3 UN 1008..................... Zone B.
Hydrogen Selenide, Anhydrous........ 2.3 UN 2202..................... Zone A.
Liquefied Gas, Toxic, Corrosive, 2.3 UN 3308.....................
n.o.s. (Arsenic Pentafluoride).
Liquefied Gas, Toxic, Corrosive, 2.3 UN 3308..................... Zone B.
n.o.s. (Germanium Tetrafluoride).
Liquefied Gas, Toxic, Corrosive, 2.3 UN 3308.....................
n.o.s. (Phosphorus Trifluoride).
Phosphine........................... 2.3 UN 2199..................... Zone A.
Silicon Tetrafluoride............... 2.3 UN 1859..................... Zone B.
----------------------------------------------------------------------------------------------------------------

0
15. In Sec. 173.304a, add paragraph (a)(3) to read as follows:

Sec. 173.304a Additional requirements for shipment of liquefied
compressed gases in specification cylinders.

(a) * * *
(3) The internal volume of a DOT 39 cylinder may not exceed 1.23
liters (nominal 75 in\3\) for a liquefied flammable gas. This cylinder
shall be equipped with a pressure relief device as defined by the
commodity in CGA S-1.1 (IBR; see Sec. 171.7 of this subchapter). If
the commodity is not listed in CGA S-1.1, a CG-7 pressure relief valve
must be used.
* * * * *
0
16. In Sec. 173.306, revise paragraph (g) to read as follows:

Sec. 173.306 Limited quantities of compressed gases.

* * * * *
(g) Water pump system tank. A water pump system tank charged with
compressed air or limited quantities of nitrogen or helium to not over
40 psig for single trip shipment to an installation site is excepted
from labeling, and the specification packaging requirements of this
subchapter when shipped under the following conditions. In addition,
shipments of these tanks are not subject to subpart F (placarding)
requirements of part 172 of this subchapter, and not subject to parts
174 (except Sec. 174.24) and 177 (except Sec. 177.817) of this
subchapter.
(1) The tank must be of steel or composite, with heads concave to
pressure, having a rated water capacity not exceeding 120 gallons and
with an outside diameter not exceeding 24 inches. Safety relief devices
are not required.
(2) The tank must be pneumatically tested to the manufacturer's
specified maximum working pressure. The test pressure must be
permanently marked on the tank.
(3) The stress at prescribed pressure for steel tanks must not
exceed 20,000 psi (or 25,000 psi for deep-draw steel), concave dome
tanks using the formula:

S = Pd/2t

Where:

S = wall stress in psi:
P = prescribed pressure for the tank of at least three (3) times
charged pressure at 70[emsp14][deg]F or 100 psig, whichever is
greater;
d = inside diameter in inches;
t = minimum wall thickness, in inches.

(4) For composite tanks, the minimum value of a hydrostatic leak
test, per design, must be at least six (6) times the charge pressure at
70 [deg]F or three (3) times the manufacturer's specified maximum
working pressure, whichever is greater.
(5) For steel and composite tanks, the burst pressure must be at
least six (6) times the charge pressure at 70 [deg]F or three (3) times
the manufacturer's specified maximum working pressure, whichever is
greater.
(6) Each tank must be over-packed in a strong outer packaging in
conformance with Sec. 173.301(h) of this part.
(7) Transportation is limited to motor vehicle, railcar, and
vessel. Transportation by aircraft is not authorized.
* * * * *
0
17. In Sec. 173.309, revise the introductory text to read as follows:

[[Page 49003]]

Sec. 173.309 Fire extinguishers.

This section applies to portable fire extinguishers for manual
handling and operation, fire extinguishers for installation in
aircraft, fire extinguishers for installation as part of a fire
suppression system, and large fire extinguishers. Large fire
extinguishers include fire extinguishers mounted on wheels for manual
handling; fire extinguishing equipment or machinery mounted on wheels
or wheeled platforms or units transported similar to (small) trailers;
and fire extinguishers composed of a non-rollable pressure drum and
equipment, and handled, for example, by forklift or crane when loaded
or unloaded.
* * * * *
0
18. In Sec. 173.312, revise paragraph (b)(1) to read as follows:

Sec. 173.312 Requirements for shipment of MEGCs.

* * * * *
(b) * * *
(1) An MEGC being filled with a liquefied compressed gas must have
each cylinder filled separately by weight. Manifolding during filling
is not authorized. The filling density for DOT-specification cylinders
may not exceed the values contained in Sec. 173.304a(a)(2) of this
subpart and for UN pressure receptacles may not exceed the values in
accordance with Sec. 173.304b(b) of this subpart.
* * * * *

PART 178--SPECIFICATIONS FOR PACKAGINGS

0
19. The authority citation for part 178 continues to read as follows:

Authority: 49 U.S.C. 5101-5128; 49 CFR 1.81 and 1.97.

0
20. In Sec. 178.35, add paragraph (f)(7) to read as follows:

Sec. 178.35 General requirements for specification cylinders.

* * * * *
(f) * * *
(7) Tare weight or mass weight, and water capacity marking. DOT-
specification 4B, 4BA, 4BW, and 4E cylinders manufactured after January
1, 2017, must be marked with the tare weight or mass weight.
Additionally, the cylinder must be permanently marked with the water
capacity. The owner of the cylinder at the time of manufacture must
ensure it is marked with the following information, as applicable:
(i) Tare weight. The tare weight for a cylinder 25 pounds (11.34
kg) or less at the time of manufacture, with a lower tolerance of 3
percent and an upper tolerance of 1 percent; or for a cylinder
exceeding 25 pounds (11.34 kg) at the time of manufacture, with a lower
tolerance of 2 percent and an upper tolerance of 1 percent. The tare
weight marking must be the actual weight of the fully assembled
cylinder, including the valve(s) and other permanently affixed
appurtenances. Removable protective cap(s) or cover(s) must not be
included in the cylinder tare weight, or
(ii) Mass weight. The mass weight for a cylinder 25 pounds (11.34
kg) or less at the time of manufacture, with a lower tolerance of 3
percent and an upper tolerance of 1 percent; or the mass weight marking
for a cylinder exceeding 25 pounds (11.34 kg) at the time of
manufacture, with a lower tolerance of 2 percent and an upper tolerance
of 1 percent. The mass weight marking must be the actual weight of the
fully assembled cylinder, excluding valve(s) and removable protective
cap(s) or cover(s); and
(iii) Water capacity. The water capacity for a cylinder 25 pounds
(11.34 kg) water capacity or less, with a tolerance of minus 1 percent
and no upper tolerance; or for a cylinder exceeding 25 pounds (11.34
kg) water capacity, with a tolerance of minus 0.5 percent and upper
tolerance. The marked water capacity of the cylinder must be the
capacity of the cylinder at the time of manufacture.
* * * * *
0
21. In Sec. 178.36, revise paragraph (i) to read as follows:

Sec. 178.36 Specification 3A and 3AX seamless steel cylinders.

* * * * *
(i) Pressure testing. Each cylinder must successfully withstand a
pressure test as follows:
(1) The test must be by water-jacket or direct expansion method as
prescribed in CGA C-1 (IBR; see Sec. 171.7 of this subchapter). The
testing equipment must be calibrated as prescribed in CGA C-1. All
testing equipment and pressure indicating devices must be accurate
within the parameters defined in CGA C-1.
(2) Each cylinder must be tested to a minimum of 5/3 times service
pressure.
(3) The minimum test pressure must be maintained for at least 30
seconds and sufficiently longer to ensure complete expansion. Any
internal pressure applied after heat-treatment and previous to the
official test may not exceed 90 percent of the test pressure. If, due
to failure of the test apparatus or operator error the test pressure
cannot be maintained the test may be repeated at a pressure increased
by 10 percent or 100 psig, whichever is lower.
(4) Permanent, volumetric expansion may not exceed 10 percent of
the total volumetric expansion at test pressure.
* * * * *
0
22. In Sec. 178.37, revise paragraph (i) to read as follows:

Sec. 178.37 Specification 3AA and 3AAX seamless steel cylinders.

* * * * *
(i) Pressure testing. Each cylinder must successfully withstand a
pressure test as follows:
(1) The test must be by water-jacket or direct expansion method as
prescribed in CGA C-1 (IBR; see Sec. 171.7 of this subchapter). The
testing equipment must be calibrated as prescribed in CGA C-1. All
testing equipment and pressure indicating devices must be accurate
within the parameters defined in CGA C-1.
(2) Each cylinder must be tested to a minimum of 5/3 times service
pressure.
(3) The minimum test pressure must be maintained for at least 30
seconds and sufficiently longer to ensure complete expansion. Any
internal pressure applied after heat-treatment and previous to the
official test may not exceed 90 percent of the test pressure. If, due
to failure of the test apparatus or operator error the test pressure
cannot be maintained the test may be repeated at a pressure increased
by 10 percent or 100 psig, whichever is lower.
(4) Permanent, volumetric expansion may not exceed 10 percent of
the total volumetric expansion at test pressure.
* * * * *
0
23. In Sec. 178.38, revise paragraph (i) to read as follows:

Sec. 178.38 Specification 3B seamless steel cylinders.

* * * * *
(i) Pressure testing. Each cylinder must successfully withstand a
pressure test as follows:
(1) The test must be by water-jacket or direct expansion method as
defined in CGA C-1 (IBR; see Sec. 171.7 of this subchapter). The
testing equipment must be calibrated as prescribed in CGA Pamphlet C-1.
All testing equipment and pressure indicating devices must be accurate
within the parameters defined in CGA Pamphlet C-1.
(2) Cylinders must be tested as follows:
(i) Each cylinder to at least two (2) times its service pressure;
or
(ii) One (1) cylinder out of each lot of 200 or fewer to at least
three (3) times its service pressure.
(3) When each cylinder is tested to the minimum test pressure, the
minimum test pressure must be maintained at least 30 seconds and
sufficiently longer to

[[Page 49004]]

ensure complete expansion. Any internal pressure applied after heat-
treatment and prior to the official test may not exceed 90 percent of
the test pressure. If, due to failure of the test apparatus or operator
error, the test pressure cannot be maintained, the test may be repeated
at a pressure increased by 10 percent or 100 psig, whichever is lower.
(4) Permanent volumetric expansion may not exceed 10 percent of
total volumetric expansion at test pressure.
(5) When one (1) cylinder out of each lot of 200 or less is tested
to at least 3 times service pressure, the balance of the lot must be
pressure tested by the water-jacket, direct expansion or proof pressure
test methods as defined in CGA C-1. The testing equipment must be
calibrated as prescribed in CGA C-1. All testing equipment and pressure
indicating devices must be accurate within the parameters defined in
CGA C-1. The cylinders must be subjected to at least 2 times service
pressure and show no defect. Determination of expansion properties is
not required.
* * * * *
0
24. In Sec. 178.39, revise paragraph (i) to read as follows:

Sec. 178.39 Specification 3BN seamless nickel cylinders.

* * * * *
(i) Pressure testing. Each cylinder must successfully withstand a
pressure test as follows:
(1) The test must be by water-jacket or direct expansion method as
prescribed in CGA C-1 (IBR; see Sec. 171.7 of this subchapter). The
testing equipment must be calibrated as prescribed in CGAC-1. All
testing equipment and pressure indicating devices must be accurate
within the parameters defined in CGA C-1.
(2) Each cylinder must be tested to a minimum of at least two (2)
times its service pressure.
(3) The minimum test pressure must be maintained at least 30
seconds and sufficiently longer to ensure complete expansion. Any
internal pressure applied after heat-treatment and prior to the
official test may not exceed 90 percent of the test pressure. If, due
to failure of the test apparatus or operator error, the test pressure
cannot be maintained, the test may be repeated at a pressure increased
by 10 percent or 100 psig, whichever is lower.
(4) Permanent volumetric expansion may not exceed 10 percent of
total volumetric expansion at test pressure.
* * * * *
0
25. In Sec. 178.42, revise paragraph (f) to read as follows:

Sec. 178.42 Specification 3E seamless steel cylinders.

* * * * *
(f) Pressure testing. Cylinders must withstand a pressure test as
follows:
(1) Lot Testing. One cylinder out of each lot of 500 or fewer must
be subjected to a test pressure of 6,000 psig or higher. The testing
equipment must be calibrated as prescribed in CGA Pamphlet C-1. All
testing equipment and pressure indicating devices must be accurate
within the parameters defined in CGA Pamphlet C-1
(2) Pressure Testing. The remaining cylinders of the lot must be
pressure tested by water jacket, direct expansion or proof pressure
method as prescribed in CGA C-1 (IBR; see Sec. 171.7 of this
subchapter). The cylinders must be examined under pressure of at least
3,000 psig and not to exceed 4,500 psig and show no defect. The test
pressure must be maintained for at least 30 seconds and sufficiently
longer to ensure complete examination.
(3) Burst Testing. (i) The cylinder in paragraph (f)(1) of this
section must burst at a pressure higher than 6,000 psig without
fragmenting or otherwise showing lack of ductility, or must hold a
pressure of 12,000 psig for 30 seconds without bursting. In which case,
it must be subjected to a flattening test without cracking to six (6)
times wall thickness between knife edges, wedge shaped 60-degree angle,
rounded out to a half-inch radius. The inspector's report must be
suitably changed to show results of latter alternate and flattening
test.
(ii) The cylinders in paragraph (f)(2) tested at a pressure in
excess of 3,600 psig must burst at a pressure higher than 7,500 psig.
* * * * *
0
26. In Sec. 178.44, revise paragraph (i) to read as follows:

Sec. 178.44 Specification 3HT seamless steel cylinders for aircraft
use.

* * * * *
(i) Pressure testing. Each cylinder must successfully withstand a
pressure test as follows:
(1) The test must be by water-jacket or direct expansion method as
prescribed in CGA C-1 (IBR; see Sec. 171.7 of this subchapter). The
testing equipment must be calibrated as prescribed in CGA C-1. All
testing equipment and pressure indicating devices must be accurate
within the parameters defined in CGA C-1.
(2) Each cylinder must be tested to minimum of 5/3 times service
pressure.
(3) The minimum test pressure must be maintained at least 30
seconds and sufficiently longer to ensure complete expansion. Any
internal pressure applied after heat-treatment and prior to the
official test may not exceed 90 percent of the test pressure. If, due
to failure of the test apparatus or operator error, the test pressure
cannot be maintained, the test may be repeated at a pressure increased
by 10 percent or 100 psig, whichever is lower.
(4) Permanent volumetric expansion may not exceed 10 percent of
total volumetric expansion at test pressure.
* * * * *
0
27. In Sec. 178.45, revise paragraph (g) to read as follows:

Sec. 178.45 Specification 3T seamless steel cylinder.

* * * * *
(g) Pressure testing. Each cylinder must successfully withstand a
pressure test as follows:
(1) The test must be by water-jacket or direct expansion method as
prescribed in CGA C-1 (IBR; see Sec. 171.7 of this subchapter). The
testing equipment must be calibrated as prescribed in CGA C-1. All
testing equipment and pressure indicating devices must be accurate
within the parameters defined in CGA C-1.
(2) Each cylinder must be tested to minimum of 5/3 times service
pressure.
(3) The minimum test pressure must be maintained at least 30
seconds and sufficiently longer to ensure complete expansion. Any
internal pressure applied after heat-treatment and prior to the
official test may not exceed 90 percent of the test pressure. If, due
to failure of the test apparatus or operator error, the test pressure
cannot be maintained, the test may be repeated at a pressure increased
by 10 percent or 100 psig, whichever is lower.
(4) Permanent volumetric expansion may not exceed 10 percent of
total volumetric expansion at test pressure.
* * * * *
0
28. In Sec. 178.46, revise paragraph (g) to read as follows:

Sec. 178.46 Specification 3AL seamless aluminum cylinders.

[[Page 49005]]

(i) 450 psig regardless of service pressure;
(ii) Two (2) times the service pressure for cylinders having
service pressure less than 500 psig; or
(iii) 5/3 times the service pressure for cylinders having a service
pressure of 500 psig or greater.
(3) The minimum test pressure must be maintained at least 30
seconds and sufficiently longer to ensure complete expansion. Any
internal pressure applied after heat treatment and prior to the
official test may not exceed 90 percent of the test pressure. If, due
to failure of the test apparatus or operator error, the test pressure
cannot be maintained, the test may be repeated at a pressure increased
by 10 percent or 100 psig, whichever is lower. If the test apparatus
again fails to maintain the test pressure, the cylinder being tested
must be condemned. Any internal pressure applied to the cylinder before
any official test may not exceed 90 percent of the test pressure.
(4) Permanent volumetric expansion may not exceed 10 percent of
total volumetric expansion at test pressure.
* * * * *
0
29. In Sec. 178.47, revise paragraph (j) to read as follows:

Sec. 178.47 Specification 4DS welded stainless steel cylinders for
aircraft use.

* * * * *
(j) Pressure testing. Each cylinder must successfully withstand a
pressure test as follows:
(1) The test must be by water-jacket or direct expansion method as
prescribed in CGA C-1 (IBR; see Sec. 171.7 of this subchapter). The
testing equipment must be calibrated as prescribed in CGA C-1. All
testing equipment and pressure indicating devices must be accurate
within the parameters defined in CGA C-1.
(2) Each cylinder must be tested to a minimum of at least two (2)
times its service pressure.
(3) The minimum test pressure must be maintained at least 30
seconds and sufficiently longer to ensure complete expansion. Any
internal pressure applied after heat-treatment and prior to the
official test may not exceed 90 percent of the test pressure. If, due
to failure of the test apparatus or operator error, the test pressure
cannot be maintained, the test may be repeated at a pressure increased
by 10 percent or 100 psig, whichever is lower.
(4) Permanent volumetric expansion may not exceed 10 percent of the
total volumetric expansion at test pressure.
(5) Cause for condemnation. Following the pressure test, the
cylinder must be inspected. A cylinder with wall thickness less than
that required by paragraph (f) of this section must be condemned.
Bulges and cracks are cause for condemnation. Welded joint defects
exceeding requirements of paragraph (k) of this section are cause for
condemnation.
* * * * *
0
30. Revise Sec. 178.50 to read as follows:

Sec. 178.50 Specification 4B welded or brazed steel cylinders.

(a) Type, size, pressure, and application. A DOT 4B is a welded or
brazed steel cylinder with longitudinal seams that are forged lap-
welded or brazed and with water capacity (nominal) not over 1,000
pounds and a service pressure of at least 150 but not over 500 psig.
Cylinders closed in by spinning process are not authorized.
(b) Steel. Open-hearth, electric or basic oxygen process steel of
uniform quality must be used. Content percent may not exceed the
following: carbon, 0.25; phosphorus, 0.045; sulphur, 0.050. The
cylinder manufacturer must maintain a record of intentionally added
alloying elements.
(c) Identification of material. Pressure-retaining materials must
be identified by any suitable method that does not compromise the
integrity of the cylinder. Plates and billets for hotdrawn cylinders
must be marked with the heat number.
(d) Manufacture. Cylinders must be manufactured using equipment and
processes adequate to ensure that each cylinder produced conforms to
the requirements of this subpart. No defect is permitted that is likely
to weaken the finished cylinder appreciably. A reasonably smooth and
uniform surface finish is required. Exposed bottom welds on cylinders
over 18 inches long must be protected by footrings. Welding procedures
and operators must be qualified in conformance with CGA C-3 (IBR, see
Sec. 171.7 of this subchapter). Seams must be made as follows:
(1) Brazing materials. Brazing materials must be by copper brazing,
by copper alloy brazing, or by silver alloy brazing. Copper alloy
composition must be: Copper, 95 percent minimum; Silicon, 1.5 percent
to 3.85 percent; Manganese, 0.25 percent to 1.10 percent.
(2) Brazed circumferential seams. Heads attached by brazing must
have a driving fit with the shell, unless the shell is crimped,
swedged, or curled over the skirt or flange of the head, and be
thoroughly brazed until complete penetration by the brazing material of
the brazed joint is secured. Depth of brazing of the joint must be at
least four (4) times the minimum thickness of shell metal.
(3) Welded circumferential seams. Circumferential seams are
permitted by the welding process.
(4) Longitudinal seams in shells. Longitudinal seams must be a
forged lap joint design. When brazed, the plate edge must be lapped at
least eight (8) times the thickness of the plate, laps being held in
position, substantially metal to metal, by riveting or electric spot-
welding; brazing must be done by using a suitable flux and by placing
brazing material on one side of seam and applying heat until this
material shows uniformly along the seam of the other side.
(e) Welding or brazing. Only the attachment of neckrings,
footrings, handles, bosses, pads, and valve protection rings to the
tops and bottoms of cylinders by welding or brazing is authorized.
Attachments and the portion of the cylinder to which they are attached
must be made of weldable steel, the carbon content of which may not
exceed 0.25 percent except in the case of 4130X steel, which may be
used with proper welding procedure.
(f) Wall thickness. The wall thickness of the cylinder must comply
with the following requirements:
(1) For cylinders with outside diameters over 6 inches, the minimum
wall thickness must be 0.090 inch. In any case, the minimum wall
thickness must be such that calculated wall stress at minimum test
pressure (paragraph (i)(4) of this section) may not exceed the
following values:
(i) 24,000 psi for cylinders without longitudinal seam.
(ii) 22,800 psig for cylinders having copper brazed or silver alloy
brazed longitudinal seam.
(iii) 18,000 psi for cylinders having forged lapped welded
longitudinal seam.
(2) Calculation must be made by the formula:

S = [P(1.3D\2\ + 0.4d\2\)]/(D\2\ - d\2\)

Where:

S = wall stress in psi;
P = minimum test pressure prescribed for water jacket test or 450
psig whichever is the greater;
D = outside diameter in inches;
d = inside diameter in inches.

(g) Heat treatment. Cylinder heads, bodies or the completed
cylinder, formed by drawing or pressing, must be uniformly and properly
heat treated by an applicable method shown in table 1 of appendix A of
this part before tests.
(h) Opening in cylinders. Openings in cylinders must comply with
the following:

[[Page 49006]]

(1) Any opening must be placed on other than a cylindrical surface.
(2) Each opening in a spherical type of cylinder must be provided
with a fitting, boss, or pad of weldable steel securely attached to the
cylinder by fusion welding.
(3) Each opening in a cylindrical type cylinder, except those for
pressure relief devices, must be provided with a fitting, boss, or pad,
securely attached to container by brazing or by welding.
(4) If threads are used, they must comply with the following:
(i) Threads must be clean cut, even without checks, and tapped to
gauge.
(ii) Taper threads must be of a length not less than as specified
for American Standard taper pipe threads.
(iii) Straight threads, must have at least four (4) engaged
threads, must have tight fit and a calculated shear strength at least
ten (10) times the test pressure of the cylinder; gaskets are required
for straight threads and must be of sufficient quality to prevent
leakage.
(iv) A brass fitting may be brazed to the steel boss or flange on
cylinders used as component parts of handheld fire extinguishers.
(5) The closure of a fitting, boss, or pad must be adequate to
prevent leakage.
(i) Pressure testing. Each cylinder must successfully withstand a
pressure test as follows:
(1) Lot testing. (i) At least one (1) cylinder randomly selected
out of each lot of 200 or fewer must be tested by the water jacket or
direct expansion method as prescribed in CGA C-1 (IBR; see Sec. 171.7
of this subchapter). The testing equipment must be calibrated as
prescribed in CGA C-1. All testing equipment and pressure indicating
devices must be accurate within the parameters defined in CGA C-1.
(ii) Each cylinder must be tested to a minimum of 2 times service
pressure.
(iii) The minimum test pressure must be maintained at least 30
seconds and sufficiently longer to ensure complete expansion. Any
internal pressure applied after heat-treatment and prior to the
official test may not exceed 90 percent of the test pressure. If, due
to failure of the test apparatus or operator error, the test pressure
cannot be maintained, the test may be repeated at a pressure increased
by 10 percent or 100 psig, whichever is lower.
(iv) Permanent volumetric expansion may not exceed 10 percent of
the total volumetric expansion at test pressure.
(2) Pressure testing. (i) The remaining cylinders in the lot must
be tested by the water-jacket, direct expansion or proof pressure test
methods as prescribed in CGA C-1. The minimum test pressure must be
maintained for a specific timeframe as prescribed and the testing
equipment must be calibrated as prescribed in CGA C-1. Further, all
testing equipment and pressure indicating devices must be accurate
within the parameters defined in CGA C-1. Determination of expansion
properties is not required.
(ii) Each cylinder must be tested to a minimum of at least two (2)
times service pressure and show no defect.
(j) Mechanical test. A mechanical test must be conducted to
determine yield strength, tensile strength, elongation as a percentage,
and reduction of area of material as a percentage as follows:
(1) Testing is required on two (2) specimens removed from one (1)
cylinder, or part thereof, heat-treated as required, as illustrated in
appendix A to subpart C of this part. For lots of 30 or fewer,
mechanical tests are authorized to be made on a ring at least 8 inches
long removed from each cylinder and subjected to the same heat of
material taken as the finished cylinder.
(2) Specimens must comply with the following:
(i) When a cylinder wall is \3/16\ inch thick or less, one the
following gauge lengths is authorized: A gauge length of 8 inches with
a width not over 1\1/2\ inches, a gauge length of 2 inches with a width
not over 1\1/2\ inches, or a gauge length at least twenty-four (24)
times the thickness with a width not over six (6) times the thickness.
(ii) The specimen, exclusive of grip ends, may not be flattened.
Grip ends may be flattened to within one inch of each end of the
reduced section.
(iii) When the size of a cylinder does not permit securing straight
specimens, the specimens may be taken in any location or direction and
may be straightened or flattened cold, by pressure only, not by blows.
When specimens are taken and prepared using this method, the
inspector's report must show detailed information regarding such
specimens in connection with the record of mechanical tests.
(iv) Heating of a specimen for any purpose is not authorized.
(3) The yield strength in tension must be the stress corresponding
to a permanent strain of 0.2 percent of the gauge length. The following
conditions apply:
(i) The yield strength must be determined by either the ``offset''
method or the ``extension under load'' method as prescribed in ASTM E 8
(IBR, see Sec. 171.7 of this subchapter).
(ii) In using the ``extension under load'' method, the total strain
(or ``extension under load'') corresponding to the stress at which the
0.2 percent permanent strain occurs may be determined with sufficient
accuracy by calculating the elastic extension of the gauge length under
appropriate load and adding thereto 0.2 percent of the gauge length.
Elastic extension calculations must be based on an elastic modulus of
30,000,000. In the event of controversy, the entire stress-strain
diagram must be plotted and the yield strength determined from the 0.2
percent offset.
(iii) For the purpose of strain measurement, the initial strain
reference must be set while the specimen is under a stress of 12,000
psi, and strain indicator reading must be set at the calculated
corresponding strain.
(iv) Cross-head speed of the testing machine may not exceed 18 inch
per minute during yield strength determination.
(v) The yield strength must not exceed 73 percent of the tensile
strength.
(k) Elongation. Mechanical test specimens must show at least a 20
percent elongation. However, elongation percentages may be reduced
numerically by one (1) percentage for each 7,500 psi increase of
tensile strength above 50,000 psi. The tensile strength may be
incrementally increased by a maximum total of 30,000 psi.
(l) Flattening test. (1) Cylinders. After pressure testing, a
flattening test must be performed on one cylinder taken at random out
of each lot of 200 or fewer by placing the cylinder between wedge-
shaped knife edges having a 60 degree included angle, rounded to a
half-inch radius. The longitudinal axis of the cylinder must be at a
90-deqree angle to knife edges during the test. For lots of 30 or
fewer, flattening tests are authorized to be performed on a ring of at
least 8 inches long removed from each cylinder and subjected to same
heat of material taken as the finished cylinder.
(2) Pipes. When cylinders are constructed of lap welded pipe, an
additional flattening test is required, without evidence of cracking,
up to six (6) times the wall thickness. In such case, the rings (crop
ends) removed from each end of the pipe, must be tested with the weld
45[emsp14][deg]F or less from the point of greatest stress.
(m) Acceptable results for flattening tests. There must be no
evidence of cracking of the sample when it is flattened between flat
plates to no more than six (6) times the wall thickness. If this test
fails, one additional sample from the same lot may be taken. If this
second sample fails, the entire lot must be condemned.
(n) Condemned cylinders. (1) Unless otherwise stated in this
section, if a

[[Page 49007]]

sample cylinder or specimen taken from a lot of cylinders fails the
prescribed test, then two additional specimens must be selected from
the same lot and subjected to the prescribed test. If either of these
fails the test, then the entire lot must be condemned.
(2) Reheat treatment of a condemned cylinder. Reheat treatment is
authorized for a condemned cylinder in accordance with this paragraph.
After reheat treatment, a cylinder must pass all prescribed tests in
this section to be considered acceptable. Repair of brazed seams by
brazing and welded seams by welding is authorized. For cylinders with
an outside diameter of less than or equal to six (6) inches, welded
seam repairs greater than one (1) inch in length shall require reheat
treatment of the cylinder. For cylinders greater than an outside
diameter of 6 inches, welded seam repairs greater than three (3) inches
in length shall require reheat treatment.
(o) Markings. (1) Markings must be as required as in Sec. 178.35
of this subpart and in addition must be stamped plainly and permanently
in any of the following locations on the cylinder:
(i) On shoulders and top heads whose wall thickness is not less
than 0.087-inch thick;
(ii) On side wall adjacent to top head for side walls which are not
less than 0.090 inch thick;
(iii) On a cylindrical portion of the shell that extends beyond the
recessed bottom of the cylinder, constituting an integral and non-
pressure part of the cylinder;
(iv) On a metal plate attached to the top of the cylinder or
permanent part thereof; sufficient space must be left on the plate to
provide for stamping at least six retest dates; the plate must be at
least \1/16\-inch thick and must be attached by welding, or by brazing.
The brazing rod must melt at a temperature of 1100[emsp14][deg]F.
Welding or brazing must be along all the edges of the plate;
(v) On the neck, neckring, valve boss, valve protection sleeve, or
similar part permanently attached to the top of the cylinder; or
(vi) On the footring permanently attached to the cylinder, provided
the water capacity of the cylinder does not exceed 30 pounds.
(2) Embossing the cylinder head or sidewall is not permitted.
0
31. Revise Sec. 178.51 to read as follows:

Sec. 178.51 Specification 4BA welded or brazed steel cylinders.

(a) Type, size, pressure, and application. A DOT 4BA cylinder is a
cylinder, either spherical or cylindrical design, with a water capacity
of 1,000 pounds or less and a service pressure range of 225 to 500
psig. Closures made by the spinning process are not authorized.
(1) Spherical type cylinder designs are permitted to have only one
circumferentially welded seam.
(2) Cylindrical type cylinder designs must be of circumferentially
welded or brazed construction; longitudinally brazed or silver-soldered
seams are also permitted.
(b) Steel. The steel used in the construction of the cylinder must
be as specified in table 1 of appendix A to this part. The cylinder
manufacturer must maintain a record of intentionally added alloying
elements.
(c) Identification of material. Pressure-retaining material must be
identified by any suitable method that does not compromise the
integrity of the cylinder. Plates and billets for hotdrawn cylinders
must be marked with the heat number.
(d) Manufacture. Cylinders must be manufactured using equipment and
processes adequate to ensure that each cylinder produced conforms to
the requirements of this subpart. No defect is permitted that is likely
to appreciably weaken the finished cylinder. A reasonably smooth and
uniform surface finish is required. Exposed bottom welds on cylinders
over 18 inches long must be protected by footrings.
(1) Seams must be made as follows:
(i) Minimum thickness of heads and bottoms must be not less than 90
percent of the required thickness of the side wall.
(ii) Circumferential seams must be made by welding or by brazing.
Heads attached by brazing must have a driving fit with the shell unless
the shell is crimped, swedged or curled over the skirt or flange of the
head and must be thoroughly brazed until complete penetration by the
brazing material of the brazed joint is secured. Depth of brazing from
end of the shell must be at least four (4) times the thickness of shell
metal.
(iii) Longitudinal seams in shells must be made by copper brazing,
copper alloy brazing, or by silver alloy brazing. Copper alloy
composition must be: Copper 95 percent minimum, Silicon 1.5 percent to
3.85 percent, Manganese 0.25 percent to 1.10 percent. The melting point
of the silver alloy brazing material must be in excess of
1,000[emsp14][deg]F. The plate edge must be lapped at least eight times
the thickness of plate, laps being held in position, substantially
metal to metal, by riveting or by electric spot-welding. Brazing must
be done by using a suitable flux and by placing brazing material on one
side of seam and applying heat until this material shows uniformly
along the seam of the other side. Strength of longitudinal seam: Copper
brazed longitudinal seam must have strength at least 3/2 times the
strength of the steel wall.
(2) Welding procedures and operators must be qualified in
conformance with CGA C-3 (IBR, see Sec. 171.7 of this subchapter).
(e) Welding or brazing. Welding or brazing of any attachment or
opening to the heads of cylinders is permitted provided the carbon
content of the steel does not exceed 0.25 percent except in the case of
4130 x steel, which may be used with proper welding procedure.
(f) Wall thickness. The minimum wall thickness of the cylinder must
meet the following conditions:
(1) For any cylinder with an outside diameter of greater than 6
inches, the minimum wall thickness is 0.078 inch. In any case, the
minimum wall thickness must be such that the calculated wall stress at
the minimum test pressure may not exceed the lesser value of any of the
following:
(i) The value shown in table 1 of appendix A to this part, for the
particular material under consideration;
(ii) One-half of the minimum tensile strength of the material
determined as required in paragraph (j) of this section;
(iii) 35,000 psi; or
(iv) Further provided that wall stress for cylinders having copper
brazed longitudinal seams may not exceed 95 percent of any of the above
values. Measured wall thickness may not include galvanizing or other
protective coating.
(2) Cylinders that are cylindrical in shape must have the wall
stress calculated by the formula:

S = [P(1.3D\2\ + 0.4d\2\)]/(D\2\ - d\2\)

Where:

S = wall stress in psi;
P = minimum test pressure prescribed for water jacket test;
D = outside diameter in inches;
d = inside diameter in inches.

(3) Cylinders that are spherical in shape must have the wall stress
calculated by the formula:

S = PD/4tE

Where:

S = wall stress in psi;
P = minimum test pressure prescribed for water jacket test;
D = outside diameter in inches;
t = minimum wall thickness in inches;
E = 0.85 (provides 85 percent weld efficiency factor which must be
applied in the girth weld area and heat affected zones which zone
must extend a distance of 6 times wall thickness from center line of
weld);
E = 1.0 (for all other areas).

[[Page 49008]]

(4) For a cylinder with a wall thickness less than 0.100 inch, the
ratio of tangential length to outside diameter may not exceed 4.1.
(g) Heat treatment. Cylinders must be heat treated in accordance
with the following requirements:
(1) Each cylinder must be uniformly and properly heat treated prior
to test by the applicable method shown in table 1 of appendix A to this
part. Heat treatment must be accomplished after all forming and welding
operations, except that when brazed joints are used, heat treatment
must follow any forming and welding operations, but may be done before,
during or after the brazing operations [see Sec. 178.51(m) for weld
repairs].
(2) Heat treatment is not required after the welding or brazing of
weldable low carbon parts to attachments of similar material which have
been previously welded or brazed to the top or bottom of cylinders and
properly heat treated, provided such subsequent welding or brazing does
not produce a temperature in excess of 400[emsp14][deg]F in any part of
the top or bottom material.
(h) Openings in cylinders. Openings in cylinders must comply with
the following requirements:
(1) Any opening must be placed on other than a cylindrical surface.
(2) Each opening in a spherical type cylinder must be provided with
a fitting, boss, or pad of weldable steel securely attached to the
container by fusion welding.
(3) Each opening in a cylindrical type cylinder must be provided
with a fitting, boss, or pad, securely attached to container by brazing
or by welding.
(4) If threads are used, they must comply with the following:
(i) Threads must be clean-cut, even, without checks and tapped to
gauge.
(ii) Taper threads must be of a length not less than that specified
for American Standard taper pipe threads.
(iii) Straight threads, having at least 4 engaged threads, must
have a tight fit and a calculated shear strength of at least 10 times
the test pressure of the cylinder. Gaskets, adequate to prevent
leakage, are required.
(i) Pressure testing. Each cylinder must successfully withstand a
pressure test as follows:
(1) Lot testing. (i) At least one (1) cylinder randomly selected
out of each lot of 200 or fewer must be tested by water jacket or
direct expansion method as prescribed in CGA C-1 (IBR, see Sec. 171.7
of this subchapter). The testing equipment must be calibrated as
prescribed in CGA C-1. All testing equipment and pressure indicating
devices must be accurate within the parameters defined in CGA C-1.
(ii) Each cylinder must be tested to a minimum of two (2) times
service pressure.
(iii) The minimum test pressure must be maintained at least 30
seconds and sufficiently longer to ensure complete expansion. Any
internal pressure applied after heat-treatment and prior to the
official test may not exceed 90 percent of the test pressure. If, due
to failure of the test apparatus or operator error, the test pressure
cannot be maintained, the test may be repeated at a pressure increased
by 10 percent or 100 psig, whichever is lower.
(iv) Permanent volumetric expansion may not exceed 10 percent of
the total volumetric expansion at test pressure.
(2) Pressure testing. (i) The remaining cylinders in the lot must
be tested by the water-jacket, direct expansion or proof pressure test
methods as prescribed in CGA C-1. The minimum test pressure must be
maintained for a specific timeframe and the testing equipment must be
calibrated as prescribed in CGA C-1. Further, all testing equipment and
pressure indicating devices must be accurate within the parameters
defined in CGA C-1. Determination of expansion properties is not
required.
(ii) Each cylinder must be tested to a minimum of two (2) times
service pressure and show no defect.
(j) Mechanical test. (1) A mechanical test must be conducted to
determine yield strength, tensile strength, elongation as a percentage,
and reduction of area of material as a percentage, as follows:
(i) Cylinders. Testing is required on two (2) specimens removed
from one cylinder or part thereof taken at random out of each lot of
200 or fewer. Samples must be removed as illustrated in appendix A to
subpart C of this part.
(ii) Spheres. Testing is required on two (2) specimens removed from
the sphere or flat representative sample plates of the same heat of
material taken at random from the steel used to produce the spheres.
Samples (including plates) must be taken from each lot of 200 or fewer.
The flat steel from which two specimens are to be removed must receive
the same heat of material taken as the as the spheres themselves.
Samples must be removed as illustrated in appendix A to subpart C of
this part.
(2) Specimens must comply with the following:
(i) When a cylinder wall is \3/16\ inch thick or less, one the
following gauge lengths is authorized: A gauge length of 8 inches with
a width not over 1\1/2\ inches, a gauge length of 2 inches with a width
not over 1\1/2\ inches, or a gauge length at least twenty-four (24)
times the thickness with a width not over six (6) times the thickness.
(ii) The specimen, exclusive of grip ends, may not be flattened.
Grip ends may be flattened to within one inch of each end of the
reduced section.
(iii) When size of the cylinder does not permit securing straight
specimens, the specimens may be taken in any location or direction and
may be straightened or flattened cold, by pressure only, not by blows.
When specimens are so taken and prepared, the inspector's report must
show in connection with record of physical tests detailed information
in regard to such specimens.
(iv) Heating of a specimen for any purpose is not authorized.
(3) The yield strength in tension must be the stress corresponding
to a permanent strain of 0.2 percent of the gauge length. The following
conditions apply:
(i) The yield strength must be determined by either the ``offset''
method or the ``extension under load'' method as prescribed in ASTM E 8
(IBR, see Sec. 171.7 of this subchapter).
(ii) In using the ``extension under load'' method, the total strain
(or ``extension under load''), corresponding to the stress at which the
0.2 percent permanent strain occurs may be determined with sufficient
accuracy by calculating the elastic extension of the gauge length under
appropriate load and adding thereto 0.2 percent of the gauge length.
Elastic extension calculations must be based on an elastic modulus of
30,000,000. In the event of controversy, the entire stress-strain
diagram must be plotted and the yield strength determined from the 0.2
percent offset.
(iii) For the purpose of strain measurement, the initial strain
reference must be set while the specimen is under a stress of 12,000
psi, and the strain indicator reading must be set at the calculated
corresponding strain.
(k) Elongation. Mechanical test specimens must show at least a 40
percent elongation for a 2-inch gauge length or at least 20 percent in
other cases. However, elongation percentages may be reduced numerically
by 2 percent for 2-inch specimens, and by 1 percent in other cases, for
each 7,500 psi increase of tensile strength above 50,000 psi. The
tensile strength may be incrementally increased by a maximum total of
30,000 psi.
(l) Tests of welds. Except for brazed seams, welds must be tested
as follows:
(1) Tensile test. A specimen must be removed from one cylinder of
each lot

[[Page 49009]]

of 200 or fewer, or welded test plate. The welded test plate must be of
one of the heats in the lot of 200 or fewer which it represents, in the
same condition and approximately the same thickness as the cylinder
wall except that in no case must it be of a lesser thickness than that
required for a quarter size Charpy impact specimen. The weld must be
made by the same procedures and subjected to the same heat of material
taken as the major weld on the cylinder. The specimen must be taken
from across the major seam and must be prepared and tested in
conformance with and must meet the requirements of CGA C-3 (IBR, see
Sec. 171.7 of this subchapter). Should this specimen fail to meet the
requirements, one additional specimen must be taken from two additional
cylinders or welded test plates from the same lot and tested. If any of
these latter two specimens fail to meet the requirements, the entire
lot represented must be condemned.
(2) Guided bend test. A root bend test specimen must be removed
from the cylinder or welded test plate, used for the tensile test
specified in paragraph (l)(1) of this section. The specimen must be
taken from across the circumferential seam and must be prepared and
tested in conformance with and must meet the requirements of CGA C-3.
Should this specimen fail to meet the requirements, one additional
specimen must be taken from two additional cylinders or welded test
plates from the same lot and tested. If any of these latter two
specimens fail to meet the requirements, the entire lot represented
must be condemned.
(3) Alternate guided-bend test. This test may be used and must be
as required by CGA C-3. The specimen must be bent until the elongation
at the outer surface, adjacent to the root of the weld, between the
lightly scribed gage lines a to b, must be at least 20 percent, except
that this percentage may be reduced for steels having a tensile
strength in excess of 50,000 psig, as provided in paragraph (k) of this
section. Should the specimen fail to meet the requirements, one
additional specimen must be taken from two additional cylinders or
welded test plates from the same lot and tested. If any of these latter
two specimens fail to meet the requirements, the entire lot represented
must be condemned.
(m) Condemned cylinders.
(1) Unless otherwise stated in this section, if a sample cylinder
or specimen taken from a lot of cylinders fails the prescribed test,
then two additional specimens must be selected from the same lot and
subjected to the prescribed test. If either of these additional
specimens fails the test, then the entire lot must be condemned.
(2) Reheat treatment of a condemned cylinder. Reheat treatment is
authorized for a condemned cylinder in accordance with this paragraph.
After reheat, a cylinder must pass all prescribed tests in this section
to be acceptable. Repair of brazed seams by brazing and welded seams by
welding is considered authorized. For cylinders with an outside
diameter of less than or equal to six (6) inches, welded seam repairs
greater than one (1) inch in length shall require reheat treatment of
the cylinder. For cylinders greater than an outside diameter of six (6)
inches, welded seam repairs greater than three (3) inches in length
shall require reheat treatment.
(n) Markings. (1) Markings must be as required in Sec. 178.35 of
this subpart and in addition must be stamped plainly and permanently in
one of the following locations on the cylinder:
(i) On shoulders and top heads whose wall thickness is not less
than 0.087 inch thick;
(ii) On side wall adjacent to top head for side walls not less than
0.090 inch thick;
(iii) On a cylindrical portion of the shell that extends beyond the
recessed bottom of the cylinder constituting an integral and non-
pressure part of the cylinder;
(iv) On a plate attached to the top of the cylinder or permanent
part thereof; sufficient space must be left on the plate to provide for
stamping at least six retest dates; the plate must be at least \1/16\-
inch thick and must be attached by welding, or by brazing at a
temperature of at least 1100 [deg]F, throughout all edges of the plate;
(v) On the neck, neckring, valve boss, valve protection sleeve, or
similar part permanently attached to the top of the cylinder; or
(vi) On the footring permanently attached to the cylinder, provided
the water capacity of the cylinder does not exceed 30 pounds.
(2) Embossing the cylinder head or side is not permitted.
0
32. In Sec. 178.53, revise paragraph (h) to read as follows:

Sec. 178.53 Specification 4D welded steel cylinders for aircraft use.

* * * * *
(h) Pressure testing. Each cylinder must successfully withstand a
pressure test as follows:
(1) Lot Testing. (i) At least one cylinder selected at random out
of each lot of 200 or fewer must be tested by water-jacket or direct
expansion as prescribed in CGA C-1 (IBR; see Sec. 171.7 of this
subchapter). The testing equipment must be calibrated as prescribed in
CGA C-1. All testing equipment and pressure indicating devices must be
accurate within the parameters defined in CGA C-1.
(ii) Each cylinder must be tested to a minimum of three (3) times
service pressure.
(iii) The minimum test pressure must be maintained be maintained at
least 30 seconds and sufficiently longer to ensure complete expansion.
Any internal pressure applied after heat-treatment and prior to the
official test may not exceed 90 percent of the test pressure. If, due
to failure of the test apparatus or operator error, the test pressure
cannot be maintained, the test may be repeated at a pressure increased
by 10 percent or 100 psig, whichever is lower.
(iv) Permanent volumetric expansion may not exceed 10 percent of
the total volumetric expansion at test pressure.
(2) Pressure testing. (i) The remaining cylinders in each lot must
be tested by the water-jacket, direct expansion or proof pressure test
methods as prescribed in CGA C-1. The minimum test pressure must be
maintained for a specific timeframe, and the testing equipment must be
calibrated as prescribed in CGA C-1. Further, all testing equipment and
pressure indicating devices must be accurate within the parameters
defined in CGA C-1. Determination of expansion properties is not
required.
(ii) Each cylinder must be tested to a minimum of two (2) times
service pressure and show no defect.
* * * * *
0
33. In Sec. 178.55, revise paragraph (i) to read as follows:

Sec. 178.55 Specification 4B240ET welded or brazed cylinders.

* * * * *
(i) Pressure testing. Each cylinder must successfully withstand a
pressure test as follows:
(1) Lot Testing. (i) At least one (1) cylinder selected at random
out of each lot of 200 or fewer must be tested by water-jacket or
direct expansion method as prescribed in CGA C-1 (IBR; see Sec. 171.7
of this subchapter). The testing equipment must be calibrated as
prescribed in CGA C-1. All testing equipment and pressure indicating
devices must be accurate within the parameters defined in CGA C-1.
(ii) Each cylinder must be tested to a minimum of two (2) times
service pressure.
(iii) The minimum test pressure must be maintained at least 30
seconds and sufficiently longer to ensure complete expansion. Any
internal pressure

[[Page 49010]]

applied after heat-treatment and prior to the official test may not
exceed 90 percent of the test pressure. If, due to failure of the test
apparatus or operator error, the test pressure cannot be maintained,
the test may be repeated at a pressure increased by 10 percent or 100
psig, whichever is lower.
(iv) Permanent volumetric expansion may not exceed 10 percent of
the total volumetric expansion at test pressure.
(2) Pressure testing. (i) The remaining cylinders in each lot must
be tested by the water-jacket, direct expansion or proof pressure test
methods as prescribed in CGA C-1. The minimum test pressure must be
maintained for a specific timeframe, and the testing equipment must be
calibrated as prescribed in CGA C-1. All testing equipment and pressure
indicating devices must be accurate within the parameters defined in
CGA C-1. Determination of expansion properties is not required.
(ii) Each cylinder must be tested to a minimum of two (2) times
service pressure and show no defect.
(3) Burst testing. (i) For purposes of burst testing, each 1,000
cylinders or fewer successively produced each day constitutes a lot.
All cylinders of a lot must be of identical size, construction heat
treatment, finish, and quality.
(ii) One cylinder must be selected from each lot and be
hydrostatically pressure tested to destruction. If this cylinder bursts
below five (5) times the service pressure, then two additional
cylinders from the same lot as the previously tested cylinder must be
selected and subjected to this test. If either of these cylinders fails
by bursting below five (5) times the service pressure then the entire
lot must be condemned.
* * * * *
0
34. In Sec. 178.56, revise paragraph (i) to read as follows:

Sec. 178.56 Specification 4AA480 welded steel cylinders.

* * * * *
(i) Pressure testing. Each cylinder must successfully withstand a
pressure test as follows:
(1) Lot testing. (i) At least one (1) cylinder selected at random
out of each lot of 200 or fewer must be tested by water-jacket or
direct expansion method as prescribed in CGA C-1 (IBR; see Sec. 171.7
of this subchapter). The testing equipment must be calibrated as
prescribed in CGA C-1. All testing equipment and pressure indicating
devices must be accurate within the parameters defined in CGA C-1.
(ii) Each cylinder must be tested to a minimum of two (2) times
service pressure.
(iii) The minimum test pressure must be maintained at least 30
seconds and sufficiently longer to ensure complete expansion. Any
internal pressure applied after heat-treatment and prior to the
official test may not exceed 90 percent of the test pressure. If, due
to failure of the test apparatus or operator error, the test pressure
cannot be maintained, the test may be repeated at a pressure increased
by 10 percent or 100 psig, whichever is lower.
(iv) Permanent volumetric expansion may not exceed 10 percent of
the total volumetric expansion at test pressure.
(v) If a selected cylinder fails, then two (2) additional specimens
must be selected at random from the same lot and subjected to the
prescribed testing. If either of these fails the test, then each
cylinder in that lot must be tested as prescribed in paragraph (i)(l)
of this section.
(2) Pressure testing. (i) The remaining cylinders in each lot must
be tested by the water-jacket, direct expansion or proof pressure test
methods as prescribed in CGA C-1. The minimum test pressure must be
maintained for a specific timeframe, and the testing equipment must be
calibrated as prescribed in CGA C-1. Further, all testing equipment and
pressure indicating devices must be accurate within the parameters
defined in CGA C-1. Determination of expansion properties is not
required.
(ii) Each cylinder must be tested to a minimum of two (2) times
service pressure and show no defect. A cylinder showing a defect must
be condemned unless it may be requalified under paragraph (m) of this
section.
* * * * *
0
35. In Sec. 178.57, revise paragraph (i) to read as follows:

Sec. 178.57 Specification 4L welded insulated cylinders.

* * * * *
(i) Pressure testing. Each cylinder, before insulating and
jacketing, must successfully withstand a pressure test as follows:
(1) The cylinder must be tested by water-jacket, direct expansion,
or proof pressure test methods as prescribed in CGA C-1 (IBR; see Sec.
171.7 of this subchapter). The testing equipment must be calibrated as
prescribed in CGA C-1. All testing equipment and pressure indicating
devices must be accurate within the parameters defined in CGA C-1.
(2) Each cylinder must be tested to a minimum of two (2) times
service pressure.
(3) The minimum test pressure must be maintained at least 30
seconds and sufficiently longer to ensure complete expansion. Any
internal pressure applied after heat-treatment and prior to the
official test may not exceed 90 percent of the test pressure. If, due
to failure of the test apparatus or operator error, the test pressure
cannot be maintained, the test may be repeated at a pressure increased
by 10 percent or 100 psig, whichever is lower.
(4) There must be no evidence of leakage, visible distortion or
other defect.
* * * * *
0
36. In Sec. 178.58, revise paragraph (i) to read as follows:

Sec. 178.58 Specification 4DA welded steel cylinders for aircraft
use.

* * * * *
(i) Pressure testing. Each cylinder must successfully withstand a
pressure test as follows:
(1) The test must be by water-jacket or direct expansion method as
prescribed in CGA C-1 (IBR; see Sec. 171.7 of this subchapter). The
testing equipment must be calibrated as prescribed in CGA C-1. All
testing equipment and pressure indicating devices must be accurate
within the parameters defined in CGA C-1.
(2) Each cylinder must be tested to a minimum of two (2) times
service pressure.
(3) The minimum test pressure must be maintained at least 30
seconds and sufficiently longer to ensure complete expansion. Any
internal pressure applied after heat-treatment and prior to the
official test may not exceed 90 percent of the test pressure. If, due
to failure of the test apparatus or operator error, the test pressure
cannot be maintained, the test may be repeated at a pressure increased
by 10 percent or 100 psig, whichever is lower.
(4) Permanent volumetric expansion may not exceed 10 percent of the
total volumetric expansion at test pressure.
* * * * *
0
37. In Sec. 178.59, revise paragraph (h) to read as follows:

Sec. 178.59 Specification 8 steel cylinders with porous fillings for
acetylene.

* * * * *
(h) Pressure testing. Each cylinder must successfully withstand a
pressure test as follows:
(1) Lot testing. (i) At least one (1) cylinder selected at random
out of each lot of 200 or fewer must be tested by water-jacket or
direct expansion method

[[Page 49011]]

as prescribed in CGA C-1 (IBR; see Sec. 171.7 of this subchapter). The
testing equipment must be calibrated as prescribed in CGA C-1. All
testing equipment and pressure indicating devices must be accurate
within the parameters defined in CGA C-1.
(ii) Each cylinder must be tested to a minimum of 750 psig.
(iii) The minimum test pressure must be maintained at least 30
seconds and sufficiently longer to ensure complete expansion. Any
internal pressure applied after heat-treatment and prior to the
official test may not exceed 90 percent of the test pressure. If, due
to failure of the test apparatus or operator error, the test pressure
cannot be maintained, the test may be repeated at a pressure increased
by 10 percent or 100 psig, whichever is lower.
(iv) Permanent volumetric expansion may not exceed 10 percent of
the total volumetric expansion at test pressure.
(v) If the tested cylinder fails, each cylinder remaining in the
lot may be tested in lieu of paragraph (h)(2) of this section by the
water-jacket or direct expansion method as prescribed in CGA C-1. Those
passing are acceptable.
(2) Pressure testing. (i) The remaining cylinders in each lot must
be pressure tested by the water-jacket, direct expansion or proof
pressure test methods as prescribed in CGA C-1. The minimum test
pressure must be maintained for a specific timeframe, and the testing
equipment must be calibrated as prescribed in CGA C-1. Further, all
testing equipment and pressure indicating devices must be accurate
within the parameters defined in CGA C-1. Determination of expansion
properties is not required.
(ii) Each cylinder must be tested between 500 and 600 psig and show
no defect.
* * * * *
0
38. In Sec. 178.60, revise paragraph (j) to read as follows:

Sec. 178.60 Specification 8AL steel cylinders with porous fillings
for acetylene.

* * * * *
(j) Pressure testing. Each cylinder must successfully withstand a
pressure test as follows:
(1) Lot Testing. (i) At least one (1) cylinder selected at random
out of each lot of 200 or less must be tested by water-jacket or direct
expansion method as prescribed in CGA C-1 (IBR; see Sec. 171.7 of this
subchapter). The testing equipment must be calibrated as prescribed in
CGA C-1. All testing equipment and pressure indicating devices must be
accurate within the parameters defined in CGA C-1.
(ii) Each cylinder must be tested to a minimum of 750 psig.
(iii) The minimum test pressure must be maintained at least 30
seconds and sufficiently longer to ensure complete expansion. Any
internal pressure applied after heat-treatment and prior to the
official test may not exceed 90 percent of the test pressure. If, due
to failure of the test apparatus or operator error, the test pressure
cannot be maintained, the test may be repeated at a pressure increased
by 10 percent or 100 psig, whichever is lower.
(iv) Permanent volumetric expansion may not exceed 10 percent of
the total volumetric expansion at test pressure.
(v) If the tested cylinder fails, each remaining cylinder in the
lot may be tested in lieu of paragraph (j)(2) of this section by the
water-jacket or direct expansion method as prescribed in CGA C-1. Those
passing are acceptable.
(2) Pressure testing. (i) The remaining cylinders in each lot must
be pressure tested by the water-jacket, direct expansion or proof
pressure test methods as prescribed in CGA C-1. The minimum test
pressure must be maintained for a specific timeframe, and the testing
equipment must be calibrated as prescribed in CGA C-1. Further, all
testing equipment and pressure indicating devices must be accurate
within the parameters defined in CGA C-1. Determination of expansion
properties is not required.
(ii) Each cylinder must be tested between 500 and 600 psig and show
no defect.
* * * * *
0
39. Revise Sec. 178.61 to read as follows:

Sec. 178.61 Specification 4BW welded steel cylinders with electric-
arc welded seam.

(a) Type, size, pressure, and application. A DOT 4BW cylinder has a
spherical or cylindrical design, a water capacity of 1,000 pounds or
less, and a service pressure range of 225 to 500 psig. Closures made by
the spinning process are not authorized.
(1) Spherical designs are permitted to have only one
circumferentially electric-arc welded seam.
(2) Cylindrical designs must be of circumferentially welded
electric-arc construction; longitudinally electric-arc welded seams are
permitted.
(b) Steel. (1) The steel used in the construction of the cylinder
must be as specified in table 1 of appendix A to this part. The
cylinder manufacturer must maintain a record of intentionally added
alloying elements.
(2) Material for heads must meet the requirements of paragraph
(b)(1) of this section or be open hearth, electric or basic oxygen
carbon steel of uniform quality. Content percent may not exceed the
following: Carbon 0.25, Manganese 0.60, Phosphorus 0.045, Sulfur 0.050.
Heads must be hemispherical or ellipsoidal in shape with a maximum
ratio of 2:1. If low carbon steel is used, the thickness of such heads
must be determined by using a maximum wall stress of 24,000 psi in the
formula described in paragraph (g)(4) of this section.
(c) Identification of material. Pressure-retaining materials must
be identified by any suitable method that does not compromise the
integrity of the cylinder. Plates and billets for hotdrawn cylinders
must be marked with the heat number.
(d) Manufacture. Cylinders must be manufactured using equipment and
processes adequate to ensure that each cylinder produced conforms to
the requirements of this subpart and the following:
(1) No defect is permitted that is likely to weaken the finished
cylinder appreciably. A reasonably smooth and uniform surface is
required. Exposed bottom welds on cylinders over 18 inches long must be
protected by footrings. Minimum thickness of heads may not be less than
90 percent of the required thickness of the sidewall. Heads must be
concave to pressure.
(2) Circumferential seams must be by electric-arc welding. Joints
must be butt with one member offset (joggle butt) or with a lap joint.
Lap joints must have a minimum overlap of at least four (4) times
nominal sheet thickness.
(3) Longitudinal electric-arc welded seams (in shells) must be of
the butt welded type. Welds must be made by a machine process including
automatic feed and welding guidance mechanisms. Longitudinal seams must
have complete joint penetration, and must be free from undercuts,
overlaps or abrupt ridges or valleys. Misalignment of mating butt edges
may not exceed \1/6\ inch of nominal sheet thickness or \1/32\ inch
whichever is less. All joints with nominal sheet thickness up to and
including \1/8\ inch must be tightly butted. When nominal sheet
thickness is greater than \1/8\ inch, the joint must be gapped with
maximum distance equal to one-half the nominal sheet thickness or \1/
32\ inch whichever is less. Joint design, preparation, and fit-up must
be such that requirements of this paragraph (d) are satisfied.
(4) Welding procedures and operators must be qualified in
accordance with CGA C-3 (IBR, see Sec. 171.7 of this subchapter).
(e) Welding of attachments. The attachment to the tops and bottoms
only of cylinders by welding of neckrings,

[[Page 49012]]

footrings, handles, bosses, pads and valve protection rings is
authorized provided that such attachments and the portion of the
container to which they are attached are made of weldable steel, the
carbon content of which may not exceed 0.25 percent.
(f) Non-destructive examination. (1) Welds of the cylinders must be
subjected to radioscopic or radiographic examination as follows:
(2) Radioscopy or radiography must be in conformance with CGA C-3
(IBR; see Sec. 171.7 of this subchapter). Maximum joint efficiency
will be 1.0 when each seam is examined completely. Maximum joint
efficiency will be 0.90 when one cylinder from each lot of 50
consecutively welded cylinders is spot examined. In addition, one out
of the first five cylinders welded following a shutdown of welding
operations exceeding four hours must be spot examined. Spot
radiographs, when required, must be made of a finished welded cylinder
and must include the girth weld for 2 inches in both directions from
the intersection of the longitudinal and girth welds and include at
least 6 inches of the longitudinal weld. Maximum joint efficiency of
0.75 will be permissible without radiography. When fluoroscopic
examination is used, permanent film records need not be retained.
(g) Wall thickness. (1) For outside diameters over 6 inches the
minimum wall thickness must be 0.078 inch. In any case, the minimum
wall thickness must be such that the wall stress calculated by the
formula listed in paragraph (g)(2) of this section may not exceed the
lesser value of any of the following:
(i) The value referenced in paragraph (b) of this section for the
particular material under consideration.
(ii) One-half of the minimum tensile strength of the material
determined as required in paragraph (k) of this section.
(iii) 35,000 psi.
(2) Stress must be calculated by the following formula:

S = [2P(1.3D\2\ + 0.4d\2\)]/[E(D\2\ - d\2\)]

Where:

S = wall stress, psi;
P = service pressure, psig;
D = outside diameter, inches;
d = inside diameter, inches;
E = joint efficiency of the longitudinal seam (from paragraph (d) of
this section).

(3) For a cylinder with a wall thickness less than 0.100 inch, the
ratio of tangential length to outside diameter may not exceed 4 to 1
(4:1).
(h) Heat treatment. Cylinders must be heat treated in accordance
with the following requirements:
(1) Each cylinder must be uniformly and properly heat treated prior
to test by the applicable method referenced in table 1 of appendix A to
this part. Heat treatment must be accomplished after all forming and
welding operations, except that when brazed joints are used, heat
treatment must follow any forming and welding operations, but may be
done before, during or after the brazing operations (see Sec.
178.51(m) of this subpart for weld repairs).
(2) Heat treatment is not required after welding of weldable low-
carbon parts to attachments of similar material which have been
previously welded to the top or bottom of cylinders and properly heat
treated, provided such subsequent welding does not produce a
temperature in excess of 400[emsp14][deg]F in any part of the top or
bottom material.
(i) Openings in cylinders. Openings in cylinders must comply with
the following requirements:
(1) All openings must be in heads or bases.
(2) Each opening in a spherical-type cylinder must be provided with
a fitting, boss, or pad of weldable steel securely attached to the
cylinder by fusion welding.
(3) Each opening in a cylindrical-type cylinder must be provided
with a fitting, boss, or pad securely attached to the cylinder by
welding.
(4) If threads are used, they must comply with the following:
(i) Threads must be clean cut, even, without checks, and tapped to
gauge.
(ii) Taper threads must be of length not less than as specified for
American Standard Taper Pipe Threads.
(iii) Straight threads, having at least four (4) engaged threads,
must have a tight fit and calculated shear strength at least ten (10)
times the test pressure of the cylinder. Gaskets, adequate to prevent
leakage, are required.
(iv) A brass fitting may be brazed to the steel boss or flange on
cylinders used as component parts of handheld fire extinguishers.
(j) Pressure testing. Each cylinder must successfully withstand a
pressure test as follows:
(1) Lot testing. (i) At least one cylinder randomly selected out of
each lot of 200 or less must be tested by the water-jacket or direct
expansion method as prescribed in CGA C-1 (IBR, see Sec. 171.7 of this
subchapter). The testing equipment must be calibrated as prescribed in
CGA C-1. All testing equipment and pressure indicating devices must be
accurate within the parameters defined in CGA C-1.
(ii) Each cylinder must be tested to a minimum of two (2) times
service pressure.
(iii) The minimum test pressure must be maintained at least 30
seconds and sufficiently longer to ensure complete expansion. Any
internal pressure applied after heat-treatment and prior to the
official test may not exceed 90 percent of the test pressure. If, due
to failure of the test apparatus or operator error, the test pressure
cannot be maintained, the test may be repeated at a pressure increased
by 10 percent or 100 psig, whichever is lower.
(iv) Permanent volumetric expansion may not exceed 10 percent of
the total volumetric expansion at test pressure.
(2) Pressure testing. (i) The remaining cylinders in each lot must
be pressure tested by the water-jacket, direct expansion or proof
pressure test methods as prescribed in CGA C-1. The minimum test
pressure must be maintained for a specific timeframe, and the testing
equipment must be calibrated as prescribed in CGA C-1. Further, all
testing equipment and pressure indicating devices must be accurate
within the parameters defined in CGA C-1. Determination of expansion
properties is not required.
(ii) Each cylinder must be tested to a minimum of two (2) times
service pressure and show no defect.
(3) Burst testing. (i) One finished cylinder selected at random out
of each lot of 500 or less must be hydrostatically tested to four (4)
times service pressure without bursting.
(k) Mechanical tests. Mechanical tests must be conducted to
determine yield strength, tensile strength, elongation as a percentage,
and reduction of area of material as a percentage, as follows:
(1) Specimens must be taken from one cylinder after heat treatment
as illustrated in appendix A to subpart C of this part, chosen at
random from each lot of 200 or fewer, as follows:
(i) Body specimen. One specimen must be taken longitudinally from
the body section at least 90 degrees away from the weld.
(ii) Head specimen. One specimen must be taken from either head on
a cylinder when both heads are made of the same material. However, if
the two heads are made of differing materials, a specimen must be taken
from each head.
(iii) If due to welded attachments on the top head there is
insufficient surface from which to take a specimen, it may be taken
from a representative head of the same heat treatment as the test
cylinder.
(2) Specimens must conform to the following:
(i) When a cylinder wall is \3/16\ inch thick or less, one the
following gauge lengths is authorized: A gauge length of 8 inches with
a width not over 1\1/2\

[[Page 49013]]

inches, a gauge length of 2 inches with a width not over 1\1/2\ inches,
or a gauge length at least twenty-four (24) times the thickness with a
width not over six (6) times the thickness.
(ii) The specimen, exclusive of grip ends, may not be flattened.
Grip ends may be flattened to within 1 inch of each end of the reduced
section.
(iii) When size of the cylinder does not permit securing straight
specimens, the specimens may be taken in any location or direction and
may be straightened or flattened cold, by pressure only, not by blows.
When specimens are taken and prepared in this manner, the inspector's
report must show in connection with the record of physical tests
detailed information in regard to such specimens.
(iv) Heating of a specimen for any purpose is not authorized.
(3) The yield strength in tension must be the stress corresponding
to a permanent strain of 0.2 percent of the gauge length. The following
conditions apply:
(i) The yield strength must be determined by either the ``off-set''
method or the ``extension under load'' method as prescribed in ASTM E 8
(IBR, see Sec. 171.7 of this subchapter).
(ii) In using the ``extension under load'' method, the total strain
(or ``extension under load''), corresponding to the stress at which the
0.2-percent permanent strain occurs may be determined with sufficient
accuracy by calculating the elastic extension of the gauge length under
appropriate load and adding thereto 0.2 percent of the gauge length.
Elastic extension calculations must be based on an elastic modulus of
30,000,000. In the event of controversy, the entire stress-strain
diagram must be plotted and the yield strength determined from the 0.2-
percent offset.
(iii) For the purpose of strain measurement, the initial strain
reference must be set while the specimen is under a stress of 12,000
psi, and the strain indicator reading must be set at the calculated
corresponding strain.
(iv) Cross-head speed of the testing machine may not exceed \1/8\
inch per minute during yield strength determination.
(l) Elongation. Mechanical test specimens must show at least a 20
percent elongation. However, elongation percentages may be reduced
numerically by one (1) for each 7,500 psi of tensile strength above
50,000 psi to a maximum of four (4) increments (i.e., 30,000 psi).
(m) Tests of welds. Welds must be subjected to the following tests:
(1) Tensile test. A specimen must be removed from one cylinder of
each lot of 200 or fewer. The specimen must be taken from across the
longitudinal seam and must be prepared and tested in conformance with
the requirements of CGA C-3 (IBR, see Sec. 171.7 of this subchapter).
(2) Guided bend test. A root bend test specimen must be removed
from the cylinder or welded test plate used for the tensile test
specified in paragraph (m)(1) of this section. Specimens must be taken
from across the longitudinal seam and must be prepared and tested in
conformance with the requirements of CGA C-3. If the specimen fails to
meet the requirements, one specimen each must be taken from two
additional cylinders or welded test plates from the same lot as the
previously tested cylinder or added test plate and tested. If either of
these latter two specimens fails to meet the requirements, the entire
lot represented must be condemned.
(3) Alternate guided bend test. This test may be used and must be
as required by CGA C-3. The specimen must be bent until the elongation
at the outer surface, adjacent to the root of the weld, between the
lightly scribed gauge lines a to b, must be at least 20 percent, except
that this percentage may be reduced for steels having a tensile
strength in excess of 50,000 psi, as provided in paragraph (l) of this
section. Should this specimen fail to meet the requirements, one
additional specimen such must be taken from two additional cylinders or
welded test plates from the same lot and tested as the previously
tested cylinder or added test plate. If either of these latter two
specimens fails to meet the requirements, the entire lot represented
must be condemned.
(n) Rejected cylinders. (1) Unless otherwise stated, if a sample
cylinder or specimen taken from a lot of cylinders fails the prescribed
test, then two additional specimens must be selected from the same lot
and subjected to the prescribed test. If either of these fails the
test, then the entire lot must be rejected.
(2) Reheat treatment of condemned cylinders. Reheat treatment is
authorized for a condemned cylinder in accordance with this paragraph.
After reheat treatment, a cylinder must pass all prescribed tests in
this section to be considered acceptable. Repair of welded seams by
welding is authorized. For cylinders less than or equal to an outside
diameter of 6 inches, welded seam repairs greater than 1 inch in length
shall require reheat treatment of the cylinder. For cylinders greater
than an outside diameter of 6 inches, welded seam repairs greater than
3 inches in length shall require reheat treatment.
(o) Markings. (1) Markings must be as required in Sec. 178.35 of
this subpart and in addition must be stamped plainly and permanently in
one of the following locations on the cylinder:
(i) On shoulders and top heads whose wall thickness is not less
than 0.087 inch thick.
(ii) On side wall adjacent to top head for side walls not less than
0.090 inch thick.
(iii) On a cylindrical portion of the shell that extends beyond the
recessed bottom of the cylinder constituting an integral and non-
pressure part of the cylinder.
(iv) On a plate attached to the top of the cylinder or permanent
part thereof; sufficient space must be left on the plate to provide for
stamping at least six retest dates; the plate must at least \1\/
16-inch thick and must be attached by welding at a
temperature of 1,100[emsp14][deg]F, throughout all edges of the plate.
(v) On the neck, neckring, valve boss, valve protection sleeve, or
similar part permanently attached to the top of the cylinder.
(vi) On the footring permanently attached to the cylinder, provided
the water capacity of the cylinder does not exceed 30 pounds.
(2) Embossing the cylinder head or side wall is not permitted.
(p) Inspector's report. In addition to the information required by
Sec. 178.35 of this subpart, the inspector's report must indicate the
type and amount of radiography.
0
40. In Sec. 178.65, revise paragraph (f) to read as follows:

Sec. 178.65 Specification 39 non-reusable (non-refillable) cylinders.

* * * * *
(f) Pressure testing. (1) Each cylinder must be proof pressure
tested as prescribed in CGA C-1 (IBR, see Sec. 171.7 of this
subchapter). The minimum test pressure must be maintained for a
specific timeframe, and the testing equipment must be calibrated as
prescribed in CGA C-1. All testing equipment and pressure indicating
devices must be accurate within the parameters defined in CGA C-1.
(2) The leakage test must be conducted by submersion under water or
by some other method that will be equally sensitive.
(3) If the cylinder leaks, evidences visible distortion or
evidences any other defect while under test, it must be condemned (see
paragraph (h) of this section).
* * * * *
0
41. In Sec. 178.68:
0
a. Revise paragraphs (b), (e), (h), (j) introductory text, (j)(1), (k),
(l) and (m);
0
b. Redesignate paragraph (n) as paragraph (o); and

[[Page 49014]]

0
c. Add new paragraph (n).
The revisions, redesignation, and addition read as follows:

Sec. 178.68 Specification 4E welded aluminum cylinders.

* * * * *
(b) Authorized material. The cylinder must be constructed of
aluminum of uniform quality. The following chemical analyses are
authorized:

Table 1--Authorized Materials
------------------------------------------------------------------------
Chemical analysis-- limits in
Designation percent 5154
------------------------------------------------------------------------
Iron plus silicon...................... 0.45 maximum.
Copper................................. 0.10 maximum.
Manganese.............................. 0.10 maximum.
Magnesium.............................. 3.10/3.90.
Chromium............................... 0.15/0.35.
Zinc................................... 0.20 maximum.
Titanium............................... 0.20 maximum.
Others, each........................... 0.05 maximum.
Others, total.......................... 0.15 maximum.
Aluminum............................... remainder.
------------------------------------------------------------------------

Note to Table 1: The aluminum used in the construction of the
cylinder must be as specified in Table 1. The cylinder manufacturer
must maintain a record of intentionally added alloying elements.
* * * * *
(e) Welding. The attachment to the tops and bottoms only of
cylinders by welding of neckrings, flanges, footrings, handles, bosses,
pads, and valve protection rings is authorized. However, such
attachments and the portion of the cylinder to which it is attached
must be made of weldable aluminum alloys.
* * * * *
(h) Pressure testing. Each cylinder must successfully withstand a
pressure test as follows:
(1) All cylinders with a wall stress greater than 18,000 psi must
be tested by water-jacket or direct expansion method as prescribed in
CGA C-1 (IBR, see Sec. 171.7 of this subchapter). The testing
equipment must be calibrated as prescribed in CGA C-1. All testing
equipment and pressure indicating devices must be accurate within the
parameters defined in CGA C-1.
(i) Each cylinder must be tested to a minimum of two (2) times
service pressure.
(ii) The minimum test pressure must be maintained at least 30
seconds and sufficiently longer to ensure complete expansion. Any
internal pressure applied after heat-treatment and prior to the
official test may not exceed 90 percent of the test pressure. If, due
to failure of the test apparatus or operator error, the test pressure
cannot be maintained, the test may be repeated at a pressure increased
by 10 percent or 100 psig, whichever is lower.
(iii) Permanent volumetric expansion may not exceed 12 percent of
the total volumetric expansion at test pressure.
(2) Lot testing. (i) Cylinders with a wall stress of 18,000 psi or
less may be lot tested. At least one cylinder randomly selected out of
each lot of 200 or less must be tested by the water-jacket or direct
expansion method as prescribed in CGA C-1. The testing equipment must
be calibrated as prescribed in CGA C-1. All testing equipment and
pressure indicating devices must be accurate within the parameters
defined in CGA C-1.
(ii) Each cylinder must be tested to a minimum of two (2) times
service pressure.
(iii) The minimum test pressure must be maintained at least 30
seconds and sufficiently longer to ensure complete expansion. Any
internal pressure applied after heat-treatment and prior to the
official test may not exceed 90 percent of the test pressure. If, due
to failure of the test apparatus or operator error, the test pressure
cannot be maintained, the test may be repeated at a pressure increased
by 10 percent or 100 psig, whichever is lower.
(iv) Permanent volumetric expansion may not exceed 12 percent of
the total volumetric expansion at test pressure.
(3) Pressure testing. (i) For cylinders with a wall stress of
18,000 psi or less, the remaining cylinders of the lot must be pressure
tested by the water-jacket, direct expansion or proof pressure test
methods as defined in CGA C-1. The minimum test pressure must be
maintained for a specific timeframe, and the testing equipment must be
calibrated as prescribed in CGA C-1. Further, all testing equipment and
pressure indicating devices must be accurate within the parameters
defined in CGA C-1. Determination of expansion properties is not
required.
(ii) Each cylinder must be tested to a minimum of two (2) times
service pressure and show no defect.
(4) Burst Testing. One (1) finished cylinder selected at random out
of each lot of 1000 or less must be hydrostatically tested to four (4)
times service pressure without bursting. Inability to meet this
requirement must result in condemnation of the lot.
* * * * *
(j) Mechanical test. A mechanical test must be conducted to
determine yield strength, tensile strength, elongation as a percentage,
and reduction of area of material as a percentage as follows:
(1) The test is required on two (2) specimens removed from one
cylinder or part thereof as illustrated in appendix A to subpart C of
this part taken at random out of each lot of 200 or fewer.
* * * * *
(k) Acceptable results for mechanical tests. An acceptable result
of the mechanical test requires a minimum tensile strength as defined
in paragraph (f)(1)(ii) of this section, an elongation to at least 7
percent and yield strength not over 80 percent of tensile strength.
(l) Weld tests. Welds of the cylinder are required to successfully
pass the following tests:
(1) Reduced section tensile test. A specimen must be removed from
the cylinder used for the mechanical tests specified in paragraph (j)
of this section. The specimen must be taken from across the seam; edges
must be parallel for a distance of approximately 2 inches on either
side of the weld. The specimen must be fractured in tension. The actual
breaking stress must be a minimum of at least 30,000 psi. The apparent
breaking stress calculated on the minimum design wall thickness must be
a minimum of two (2) times the stress calculated under paragraph (f)(2)
of this section. If the specimen fails to meet the requirements, the
lot must be condemned except that specimens may be taken from two (2)
additional cylinders from the same lot as the previously tested
specimens. If either of the latter specimens fails to meet
requirements, the entire lot represented must be condemned.
(2) Guided bend test. A bend test specimen must be removed from the
cylinder used for the mechanical test specified in paragraph (j) of
this section. The specimen must be taken across the circumferential
seam, must be a minimum of 1\1/2\ inches wide, edges must be parallel
and rounded with a file, and back-up strip, if used, must be removed by
machining. The specimen must be tested as follows:
(i) The specimen must be bent to refusal in the guided bend test
jig as illustrated in CGA C-3 (IBR, see Sec. 171.7 of this
subchapter). The root of the weld (inside surface of the cylinder) must
be located away from the ram of the jig. The specimen must not show a
crack or other open defect exceeding \1/8\ inch in any direction upon
completion of the test. Should this specimen fail to meet the
requirements, one additional specimen must be taken from two additional
cylinders from the same lot and tested. If either of the latter
specimens fails to meet requirements, the entire lot represented must
be condemned.
(ii) Alternate guided bend test. This test may be used as an
alternate to the

[[Page 49015]]

guided bend test. The test specimen must be in conformance with The
Aluminum Association's ``Welding Aluminum: Theory and Practice, Fourth
Edition, 2002'' (IBR, see Sec. 171.7 of this subchapter). If the
specimen fails to meet the requirements, one additional specimen must
be taken from two additional cylinders or welded test plates from the
same lot and tested. If any of these latter two specimens fails to meet
the requirements, the entire lot must be condemned.
(m) Condemned cylinders. (1) Unless otherwise stated, if a sample
cylinder or specimen taken from a lot of cylinders fails the prescribed
test, then two additional specimens must be selected from the same lot
and subjected to the prescribed test. If either of these fails the
test, then the entire lot must be condemned.
(2) Repair of welded seams is authorized. Acceptable cylinders must
pass all prescribed tests.
(n) Markings. (1) Markings must be as required in Sec. 178.35 of
this subpart and in addition must be stamped plainly and permanently in
one of the following locations on the cylinder:
(i) On the neck, neckring, valve boss, valve protection sleeve, or
similar part permanently attached to the top of the cylinder.
(ii) On the footring permanently attached to the cylinder, provided
the water capacity of the cylinder does not exceed 30 pounds.
(2) Embossing the cylinder head or side wall is not permitted.
* * * * *
0
42. In Sec. 178.70, revise paragraph (d) to read as follows:

Sec. 178.70 Approval of UN pressure receptacles.

* * * * *
(d) Modification of approved pressure receptacle design type.
Modification of an approved UN/ISO pressure receptacle design type is
not authorized without the approval of the Associate Administrator.
However, modification of an approved UN/ISO pressure receptacle design
type is authorized without an additional approval of the Associate
Administrator provided the design modification is covered under the UN/
ISO standard for the design type. A manufacturer seeking modification
of an approved UN/ISO pressure receptacle design type may be required
to submit design qualification test data to the Associate Administrator
before production.
* * * * *

PART 180--CONTINUING QUALIFICATION AND MAINTENANCE OF PACKAGINGS

0
43. The authority citation for part 180 continues to read as follows:

Authority: 49 U.S.C. 5101-5128; 49 CFR 1.81 and 1.97.

0
44. In Sec. 180.203:
0
a. Add definitions for the words ``accuracy,'' ``accuracy grade,''
``actual test pressure,'' ``calibrated cylinder,'' ``error,'' ``master
gauge,'' ``mobile unit,'' ``over-pressurized,'' ``percent permanent
expansion,'' ``precision,'' ``proof pressure test,'' ``reference
gauge,'' and ``service pressure'' in alphabetical order; and
0
b. Revise the definition for the words ``commercially free of corrosive
components,'' ``defect,'' and ``test pressure.''
The additions and revisions read as follows:

Sec. 180.203 Definitions

* * * * *
Accuracy means the conformance of a particular reading to a known
standard. Accuracy is expressed as the percentage of error from, or
degree of closeness to, the true value, such as the difference between
the measurement result displayed by the instrument and the value
obtained when a measurement standard is used to perform the
measurement. This value may be represented as a percent of full scale.
Accuracy grade means the inherent quality of the device. It
expresses the maximum error allowed for the device at any reading.
Accuracy grade is expressed as a percentage of the full scale of the
device.
Actual test pressure means the pressure applied to a cylinder
during a requalification test.
Calibrated cylinder means a cylinder that has certified calibration
points of pressure with corresponding expansion values. It is a
secondary, derived standard used for the verification and demonstration
of test system accuracy and integrity.
Commercially free of corrosive components means a hazardous
material having a moisture content less than 55 ppm and free of
components that will adversely react with the cylinder (e.g. chemical
stress corrosion).
* * * * *
Defect means an imperfection requiring a cylinder to be rejected or
condemned.
* * * * *
Error means the difference between the measured values and the true
value.
* * * * *
Master gauge means a pressure indicating device that is used as a
calibration standard, has an inherent accuracy grade equal to or better
than the requirement for the pressure indicating device in the test
apparatus, and is an instrument not used in the daily performance of
cylinder testing.
Mobile unit means a vehicle specifically authorized under a RIN to
carry out requalification operations identified under the RIN within a
geographic area no more than 100 miles from the principle place of
business of the RIN holder. Mobile units must comply with the
requirements outlined in the approval issuance letter from the
Associate Administrator for Hazardous Materials Safety (see Sec.
107.805 of subchapter A of this chapter).
* * * * *
Over-pressurized means a condition in which the internal pressure
applied to a cylinder has reached or exceeded the yield point of the
cylinder.
Percent permanent expansion means the ratio of permanent expansion
to total expansion, expressed as a percentage. The calculation for
percent permanent expansion is the permanent expansion divided by total
expansion times 100.
* * * * *
Precision of a measurement means the degree of scatter of the
recorded values when the measurement is repeated a number of times
under the same conditions.
Proof pressure test means a pressure test by interior
pressurization without the determination of a cylinder's expansion. A
gas (e.g., air) or a liquid (e.g., water) is used as a means to achieve
interior pressurization.
* * * * *
Reference gauge means a pressure indicating device that is used in
the daily verification of a proof test system, and has an inherent
accuracy equal to or better than the requirement for the device to be
checked.
* * * * *
Service pressure means the rated service pressure marked on the
cylinder.
Test pressure means the minimum prescribed pressure required for
the requalification of a cylinder.
* * * * *
0
45. In Sec. 180.205:
0
a. Revise paragraphs (c) introductory text, (d), (g)(3), (h)(3),
(i)(1)(viii), (i)(2), and (i)(3); and
0
b. Add paragraphs (f)(5), (f)(6), (i)(1)(ix), (i)(1)(x), (i)(1)(xi) and
(j).
The additions and revisions read as follows:

[[Page 49016]]

Sec. 180.205 General requirements for requalification of
specification cylinders.

* * * * *
(c) Periodic requalification of cylinders. Each cylinder bearing a
DOT-specification marking must be requalified and marked as specified
in the Requalification Table in this subpart. Each cylinder bearing a
DOT special permit (or exemption) number must be requalified and marked
in conformance with this section and the terms of the applicable
special permit (or exemption). No cylinder may be filled with a
hazardous material and offered for transportation in commerce unless
that cylinder has been successfully requalified and marked in
conformance with this subpart. A cylinder may be requalified at any
time during or before the month and year that the requalification is
due. However, a cylinder filled before the requalification becomes due
may remain in service until it is emptied. A cylinder with a specified
service life may not be refilled and offered for transportation after
its authorized service life has expired.
* * * * *
(d) Conditions requiring test and inspection of cylinders. Without
regard to any other periodic requalification requirements, a cylinder
must be tested and inspected in accordance with this section prior to
further use if--
(1) The cylinder shows evidence of dents, corrosion, cracked or
abraded areas, leakage, or any other condition that might render it
unsafe for use in transportation;
(2) The cylinder has been in an accident and has been damaged to an
extent that may adversely affect its lading retention capability;
(3) The cylinder shows evidence of or is known to have thermal
damage, or have been over-heated;
(4) Except as provided in Sec. 180.212 of this subpart, the
cylinder shows evidence of grinding; or
(5) The Associate Administrator determines that the cylinder may be
in an unsafe condition.
* * * * *
(f) * * *
(5) Shot blasting of cylinders is permitted. Grinding, sanding, or
any other removal of wall thickness of a cylinder is not permitted,
except by an authorized facility, as provided in Sec. 180.212 of this
subpart for the removal of surface corrosion.
(6) Chasing of cylinder threads to clean them is permitted, but
removal of metal must not occur. Re-tapping of cylinder threads is not
permitted, except by the original manufacturer, as provided in Sec.
180.212 of this subpart.
(g) * * *
(3) Each day before retesting, the retester shall confirm, by using
a calibrated cylinder or other method authorized in writing by the
Associate Administrator, that:
(i) The pressure-indicating device (PID), as part of the retest
equipment, is accurate within 1.0% of the prescribed test
pressure of any cylinder tested that day. The PID must meet Industrial
Class 1 (1.0% deviation from the end value) with a scale
appropriate to the test pressure of the cylinder. The accuracy of the
PID within the test system can be demonstrated at any point within 500
psig of the actual test pressure for test pressures at or above 3,000
psig, or 10% of the actual test pressure for test pressures below 3,000
psig.
(ii) The expansion-indicating device (EID), as part of the retest
equipment, gives a stable reading of expansion and is accurate to
1.0% of the total expansion of any cylinder tested or 0.1
cc, whichever is larger. The EID must be accurate (1.0%
deviation from the end value) of its full scale. The weigh scales must
be capable of providing total expansion measurements to an accuracy of
1.0% or 0.05 ounce (1.5 g), whichever is greater.
* * * * *
(h) * * *
(3) Unless the cylinder is repaired or rebuilt in conformance with
requirements in Sec. 180.211of this subpart, it may not be filled with
a hazardous material and offered for transportation where use of a
specification packaging is required.
* * * * *
(i) * * *
(1) * * *
(viii) For an aluminum or an aluminum-lined composite special
permit cylinder, the cylinder is known to have been or shows evidence
of having been overheated. Arc burns must be considered evidence of
overheating.
(ix) The cylinder is known to have been or shows evidence of having
been over-pressurized.
(x) For a cylinder with a specified service life, its authorized
service life has expired.
(xi) The cylinder has been stamped on the sidewall, except as
provided in part 178 of this subchapter.
(2) When a cylinder must be condemned, the requalifier must--
(i) Communicate condemnation of the cylinder as follows: (A) Stamp
a series of X's over the DOT-specification number and the marked
pressure or stamp ``CONDEMNED'' on the shoulder, top head, or neck
using a steel stamp;
(B) For composite cylinders, securely affix to the cylinder a label
with the word ``CONDEMNED'' overcoated with epoxy near, but not
obscuring, the original cylinder manufacturer's label; or
(C) As an alternative to the stamping or labeling as described in
this paragraph (i)(2), at the direction of the owner, the requalifier
may render the cylinder incapable of holding pressure; and
(ii) Notify the cylinder owner, in writing, that the cylinder is
condemned and may not be filled with hazardous material and offered for
transportation in commerce where use of a specification packaging is
required.
(3) No person may remove, obliterate, or alter the required
condemnation communication of paragraph (i)(2) of this section.
(j) Training materials. Training materials (such as CGA C-1.1; see
Sec. 171.7, Table I of this subchapter) may be used for training
persons who requalify cylinders using the volumetric expansion test
method.
0
46. In Sec. 180.207, revise paragraphs (a)(3), (b)(2), (c)
introductory text, (d) introductory text, (d)(1), and (d)(3) to read as
follows:

Sec. 180.207 Requirements for requalification of UN pressure
receptacles.

(a) * * *
(3) A pressure receptacle with a specified service life may not be
requalified after its authorized service life has expired, but must be
condemned in accordance with Sec. 180.205(i)(x) of this subpart.
(b) * * *
(2) Each pressure receptacle that fails requalification must be
condemned in conformance with Sec. 180.205(i) of this subpart or the
applicable ISO requalification standard.
* * * * *
(c) Requalification interval. Each UN pressure receptacle that
becomes due for periodic requalification must be requalified at the
interval specified in the following table before it is filled: * * *
* * * * *
(d) Requalification procedures. Each UN pressure receptacle must be
requalified in conformance with the procedures contained in the
following standards, as applicable. Furthermore, when a pressure test
is performed on a UN pressure receptacle, the test must be a water
jacket volumetric expansion test suitable for the determination of the
cylinder expansion or a hydraulic proof pressure test. The test
equipment must conform to the accuracy requirements in Sec. 180.205(g)
of this subpart. Alternative methods (e.g., acoustic emission) or
requalification procedures may be

[[Page 49017]]

performed if prior approval has been obtained in writing from the
Associate Administrator.
(1) Seamless steel: Each seamless steel UN pressure receptacle,
including MEGC's pressure receptacles exceeding 150 L capacity, must be
requalified in conformance with ISO 6406 (IBR, see Sec. 171.7 of this
subchapter). However, UN cylinders with a tensile strength greater than
or equal to 950 MPa must be requalified by ultrasonic examination in
conformance with ISO 6406.
* * * * *
(3) Dissolved acetylene UN cylinders: Each dissolved acetylene
cylinder must be requalified in conformance with ISO 10462 (IBR, see
Sec. 171.7 of this subchapter). The porous mass and the shell must be
requalified no sooner than five (5) years and no later than ten (10)
years from the date of manufacture. Thereafter, subsequent
requalifications of the shell must be performed at least once every ten
(10) years.
* * * * *
0
47. In Sec. 180.209, revise paragraphs (a), (b), (c), (e), (g), (l)(1)
and (m) to read as follows:

Sec. 180.209 Requirements for requalification of specification
cylinders.

(a) Periodic qualification of cylinders. Each specification
cylinder that becomes due for periodic requalification, as specified in
the following table, must be requalified and marked in conformance with
the requirements of this subpart before it is filled. Requalification
records must be maintained in conformance with Sec. 180.215 of this
subpart. Table 1 follows:

Table 1--Requalification of Cylinders
------------------------------------------------------------------------
Specification under which Minimum test Requalification
cylinder was made pressure (psig) \1\ period (years)
------------------------------------------------------------------------
DOT 3....................... 3000 psig........... 5.
DOT 3A, 3AA................. 5/3 times service 5, or 12 (see Sec.
pressure, except 180.209(b), (f),
noncorrosive (h), and (j)).
service (see Sec.
180.209(g)).
DOT 3AL\2\.................. 5/3 times service 5, or 12 (see Sec.
pressure. Sec. 180.209(j)
and (m)).
DOT 3AX, 3AAX............... 5/3 times service 5
pressure.
3B, 3BN..................... 2 times service 5 or 10 (see Sec.
pressure (see Sec. 180.209(f)).
180.209(g)).
3E.......................... Test not required...
3HT......................... 5/3 times service 3 (see Sec. Sec.
pressure. 180.209(k) and
180.213(c)).
3T.......................... 5/3 times service 5.
pressure.
4AA480...................... 2 times service 5 or 10 (see Sec.
pressure (see Sec. 180.209(h)).
180.209(g)).
4B, 4BA, 4BW, 4B-240ET...... 2 times service 5, 10, or 12 (see
pressure, except Sec. 180.209(e),
non-corrosive (f), and (j)).
service (see Sec.
180.209(g)).
4D, 4DA, 4DS................ 2 times service..... 5.
DOT 4E...................... 2 times service 5 or 10 ((see Sec.
pressure, except Sec. 180.209(e)).
non-corrosive (see
Sec. 180.209(g)).
4L.......................... Test not required...
8, 8AL...................... .................... 10 or 20 (see Sec.
180.209(i)).
Exemption or special permit See current See current
cylinder. exemption or exemption or
special permit. special permit.
Foreign cylinder (see Sec. As marked on 5 (see Sec. Sec.
173.301(j) of this cylinder, but not 180.209(l) and
subchapter for restrictions less than 5/3 of 180.213(d)(2)).
on use). any service or
working pressure
marking.
------------------------------------------------------------------------
\1\ For cylinders not marked with a service pressure, see Sec.
173.301a(b) of this subchapter.
\2\ For special permit (or exemption) aluminum cylinders marked DOT 3AL,
see Sec. 173.23(c) of this subchapter.

(b) DOT 3A or 3AA cylinders. (1) A cylinder conforming to
specification DOT 3A or 3AA with a water capacity of 56.7 kg (125
pounds) or less may be marked with a star and requalified every 10
years instead of every 5 years, provided the cylinder conforms to all
of the following conditions:
(i) The cylinder is used exclusively for air; argon; cyclopropane;
ethylene; helium; hydrogen; krypton; neon; nitrogen; nitrous oxide;
oxygen; sulfur hexafluoride; xenon; chlorinated hydrocarbons,
fluorinated hydrocarbons, liquefied hydrocarbons, and mixtures thereof
that are commercially free from corroding components; permitted
mixtures of these gases (see Sec. 173.301(d) of this subchapter); and
permitted mixtures of these gases with up to 30 percent by volume of
carbon dioxide, provided the gas has a moisture content less than 55
ppm.
(ii) The cylinder is not used in any cascade, bank, group, rack or
vehicle. The cylinder is not used in self-contained underwater
breathing apparatus (SCUBA), self-contained breathing apparatus (SCBA),
or in an emergency respirator.
(iii) The permanent expansion does not exceed 5 percent of the
total expansion.
(iv) The results of the hydrostatic test meet one of the following
requirements:
(A) The elastic expansion does not exceed the manufacturer's marked
rejection elastic expansion (REE) limit on the cylinder;
(B) The elastic expansion does not exceed the applicable rejection
limit tabulated in CGA C-5 (IBR, see Sec. 171.7 of this subchapter);
or
(C) Either the average wall stress or the maximum wall stress does
not exceed the corresponding wall stress limitation determined by
computing the REE limit in conformance with CGA C-5.
(v) The cylinder is dried immediately after hydrostatic testing to
remove all traces of water.
(vi) The cylinder is stamped with a five-pointed star at least one-
fourth of an inch high immediately following the test date to indicate
compliance with this paragraph (b)(1).
(2) If a cylinder has not been used exclusively for the gases
specifically identified in paragraph (b)(1)(i) of this section, but
currently conforms with all other provisions of paragraph (b)(1) of
this section, it may be requalified every 10 years instead of every 5
years, only after the cylinder has been retested, marked, and placed
into exclusive use and gas service in compliance with paragraph (b)(1)
of this section.
(3) If, at any time, a cylinder marked with a five-pointed star is
used in a manner other than as specified in paragraph (b)(1) of this
section, the star following the most recent test date must be
obliterated. The cylinder must be requalified within five years from
the

[[Page 49018]]

marked test date, or if the required five-year requalification period
has passed, the cylinder must be requalified prior to the first filling
with a compressed gas.
(c) DOT 4-series cylinders. A DOT 4-series cylinder, except a 4L
cylinder, that at any time shows evidence of a leak, internal or
external corrosion, denting, bulging or rough usage to the extent that
it is likely to be weakened appreciably, or that has lost 5 percent or
more of its official tare weight must be requalified before being
refilled and offered for transportation. [Refer to CGA C-6 or C-6.3
(IBR, see Sec. 171.7 of this subchapter), as applicable, regarding
cylinder weakening.] After testing, the actual tare weight must be
recorded as the new tare weight on the test report and marked on the
cylinder. The previous tare weight must be strike-lined through, but
not obliterated.
* * * * *
(e) Proof pressure test. A cylinder made in conformance with DOT
Specifications 4B, 4BA, 4BW, or 4E protected externally by a suitable
corrosion-resistant coating and used exclusively for non-corrosive gas
that is commercially free from corroding components may be requalified
by volumetric expansion testing or proof pressure testing every 10
years instead of every 5 years. However, a cylinder used for
reclaiming, recycling, or recovering refrigerant gases must be
requalified by volumetric expansion testing every 5 years. Reclaimed,
recycled, or recovered refrigerant gases are considered to be corrosive
due to contamination. When subjected to a proof pressure test, as
prescribed in CGA C-1 (IBR, see Sec. 171.7 of this subchapter) and
consistent with the applicable specification testing requirement in
Part 178 of this subchapter, the cylinder must be carefully examined
under test pressure and removed from service if a leak or defect is
found.
* * * * *
(g) Visual inspections. A cylinder conforming to a specification
listed in the table in this paragraph and used exclusively in the
service indicated may, instead of a periodic hydrostatic test, be given
a complete external visual inspection at the time periodic
requalification becomes due. External visual inspection must be in
conformance with CGA C-6 or C-6.3, as applicable (IBR, see Sec. 171.7
of this subchapter). When this inspection is used instead of
hydrostatic testing, subsequent inspections are required at five-year
intervals after the first inspection. Inspections must be made only by
persons holding a current RIN and the results recorded and maintained
in conformance with Sec. 180.215 of this subpart. Records must
include: date of inspection (month and year); DOT-specification number;
cylinder identification (registered symbol and serial number, date of
manufacture, and owner); type of cylinder protective coating (including
statement as to need of refinishing or recoating); conditions checked
(e.g., leakage, corrosion, gouges, dents or digs in shell or heads,
broken or damaged footring or protective ring or fire damage); and
disposition of cylinder (returned to service, returned to cylinder
manufacturer for repairs or condemned). A cylinder passing
requalification by the external visual inspection must be marked in
conformance with Sec. 180.213 of this subpart. Specification cylinders
must be in exclusive service as shown in the following table:

------------------------------------------------------------------------
Cylinders conforming to-- Used exclusively for--
------------------------------------------------------------------------
DOT 3A, DOT 3AA, DOT 3A480X, DOT 4AA480 Anhydrous ammonia of at least
99.95% purity.
DOT 3A, DOT 3AA, DOT 3A480X, DOT 3B, Butadiene, inhibited, that is
DOT 4B, DOT 4BA, DOT 4BW. commercially free from
corroding components.
DOT 3A, DOT 3AA, DOT 3A480X, DOT 3B, Cyclopropane that is
DOT 4AA480, DOT 4B, DOT 4BA, DOT 4BW. commercially free from
corroding components.
DOT 3A, DOT 3AA, DOT 3A480X, DOT 4B, Chlorinated hydrocarbons and
DOT 4BA, DOT 4BW, DOT 4E. mixtures thereof that are
commercially free from
corroding components.
DOT 3A, DOT 3AA, DOT 3A480X, DOT 4B, Fluorinated hydrocarbons and
DOT 4BA, DOT 4BW, DOT 4E. mixtures thereof that are
commercially free from
corroding components.
DOT 3A, DOT 3AA, DOT 3A480X, DOT 3B, Liquefied hydrocarbon gas that
DOT 4B, DOT 4BA, DOT 4BW, DOT 4E. is commercially free of
corroding components.
DOT 3A, DOT 3AA, DOT 3A480X, DOT 3B, Liquefied petroleum gas that
DOT 4B, DOT 4BA, DOT 4BW, DOT 4E. meets the detail requirements
limits in Table 1 of ASTM
1835, Standard Specification
for Liquefied Petroleum (LP)
Gases or an equivalent
standard containing the same
limits.
DOT 3A, DOT 3AA, DOT 3B, DOT 4B, DOT Methylacetylene-propadiene,
4BA, DOT 4BW, DOT 4E. stabilized, that is
commercially free from
corroding components.
DOT 3A, DOT 3AA, DOT 3B, DOT 4B, DOT Methylacetylene-propadiene,
4BA, DOT 4BW, DOT 4E. stabilized, that is
commercially free from
corroding components.
DOT 3A, DOT 3AA, DOT 3B, DOT 4B, DOT Propylene that is commercially
4BA, DOT 4BW, DOT 4E. free from corroding
components.
DOT 3A, DOT 3AA, DOT 3B, DOT 4B, DOT Anhydrous mono,
4BA, DOT 4BW. ditrimethylamines that are
commercially free from
corroding components.
DOT 4B240, DOT 4BW240.................. Ethyleneimine, stabilized.
DOT 4BW................................ Alkali metal alloys, liquid,
n.o.s., Alkali metal
dispersions or Alkaline earth
metal dispersions, Potassium,
Potassium Sodium alloys and
Sodium that are commercially
free of corroding components.
------------------------------------------------------------------------

* * * * *
(j) Cylinder used as a fire extinguisher. Only a DOT-specification
cylinder used as a fire extinguisher in conformance with Sec.
173.309(a) of this subchapter may be requalified in conformance with
this paragraph (j).
(1) A DOT 4B, 4BA, 4B240ET or 4BW cylinder used as a fire
extinguisher may be tested as follows:
(i) For a cylinder with a water capacity of 5.44 kg (12 pounds) or
less, by the water-jacket, direct expansion or proof pressure test
methods as prescribed in CGA C-1 (IBR, see Sec. 171.7 of this
subchapter). A requalification must be performed by the end of 12 years
after the original test date and at 12-year intervals thereafter.
(ii) The testing procedures, calibration of the testing equipment,
accuracy of the pressure indicating device, accuracy of the testing
equipment must be as prescribed in CGA C-1.

[[Page 49019]]

(iii) Each cylinder must be tested to a minimum of two (2) times
service pressure.
(iv) When testing using the water-jacket or direct expansion test
method, the minimum test pressure must be maintained at least 30
seconds and sufficiently longer to ensure complete expansion. Any
internal pressure applied prior to the official test may not exceed 90
percent of the test pressure. If, due to failure of the test apparatus
or operator error, the test pressure cannot be maintained, the test may
be repeated at a pressure increased by 10 percent or 100 psig,
whichever is lower.
(v) The permanent volumetric expansion may not exceed 10 percent of
total volumetric expansion at test pressure.
(vi) When testing using the proof pressure test method, the minimum
test pressure must be maintained for a specific time frame as
prescribed in CGA C-1. Any internal pressure applied prior to the
official test may not exceed 90 percent of the test pressure. If, due
to failure of the test apparatus or operator error, the test pressure
cannot be maintained, the test may be repeated at a pressure increased
by 10 percent or 100 psig, whichever is lower.
(vii) When subjected to a proof pressure test, the cylinder must be
carefully examined under test pressure and removed from service if a
leak or defect is found.
(2) For a cylinder having a water capacity over 5.44 kg (12
pounds), by the water-jacket, direct expansion or proof pressure test
methods as prescribed in CGA C-1. For the water-jacket or direct
expansion test, the requalification must be performed by the end of 12
years after the original test date and at 12-year intervals theafter.
For the proof-pressure test, a requalification must be performed by the
end of 12 years after the original test date and at seven (7) year
intervals.
(ii) The testing procedures, calibration of the testing equipment,
accuracy of the pressure indicating device, and accuracy of the testing
equipment must be as prescribed in CGA C-1.
(iii) Each cylinder must be tested to a minimum of two (2) times
service pressure.
(iv) When testing using the water-jacket or direct expansion test
method, the minimum test pressure must be maintained at least 30
seconds and sufficiently longer to ensure complete expansion. Any
internal pressure applied prior to the official test may not exceed 90
percent of the test pressure. If, due to failure of the test apparatus
or operator error, the test pressure cannot be maintained, the test may
be repeated at a pressure increased by 10 percent or 100 psig,
whichever is lower.
(v) The permanent volumetric expansion may not exceed 10 percent of
total volumetric expansion at test pressure. For DOT 4E cylinders, the
permanent volumetric expansion may not exceed 12 percent of total
volumetric expansion at test pressure.
(vi) When testing using the proof pressure test method, the minimum
test pressure must be maintained for a specific timeframe as prescribed
in CGA C-1 (IBR, see Sec. 171.7 of this subchapter). Any internal
pressure applied prior to the official test may not exceed 90 percent
of the test pressure. If, due to failure of the test apparatus or
operator error, the test pressure cannot be maintained, the test may be
repeated at a pressure increased by 10 percent or 100 psig, whichever
is lower.
(vii) When subjected to a proof pressure test, the cylinder must be
carefully examined under test pressure and removed from service if a
leak or defect is found.
(3) A DOT 3A, 3AA, or 3AL cylinder must be requalified by:
(i) The water-jacket or direct expansion method. A requalification
must be performed 12 years after the original test date and at 12-year
intervals thereafter.
(ii) The testing procedures, calibration of the testing equipment,
accuracy of the pressure indicating device, accuracy of the testing
equipment must be as prescribed in CGA C-1.
(iii) Each cylinder must be tested to a minimum of \5/3\ times
service pressure.
(iv) When testing using the water-jacket or direct expansion test
method, the minimum test pressure must be maintained at least 30
seconds and sufficiently longer to ensure complete expansion. Any
internal pressure applied prior to the official test may not exceed 90
percent of the test pressure. If, due to failure of the test apparatus
or operator error, the test pressure cannot be maintained, the test may
be repeated at a pressure increased by 10 percent or 100 psig,
whichever is lower.
(v) The permanent volumetric expansion may not exceed 10 percent of
total volumetric expansion at test pressure. For DOT 4E cylinders, the
permanent volumetric expansion may not exceed 12 percent of total
volumetric expansion at test pressure.
* * * * *
(l) * * *
(1) It has been inspected, tested and marked in conformance with
the procedures and requirements of this subpart or the Associate
Administrator has authorized the filling company to fill foreign
cylinders under an alternative method of qualification; and
* * * * *
(m) DOT-3AL cylinders manufactured of 6351-T6 aluminum alloy. In
addition to the periodic requalification and marking described in Sec.
180.205 of this subpart, each cylinder manufactured of aluminum alloy
6351-T6 with a marked service pressure equal to or exceeding 1,800 psi
must be requalified and inspected for sustained load cracking in
conformance with the non-destructive examination method described in
the following table. A cylinder with cracks must be condemned in
conformance with Sec. 180.205(i) of this subpart.

Requalification and Inspection of DOT-3AL Cylinders Made of Aluminum Alloy 6351-T6
----------------------------------------------------------------------------------------------------------------
Sustained Load Cracking Requalification
Requalification requirement Examination procedure \1\ Condemnation Criteria \2\ period (years)
----------------------------------------------------------------------------------------------------------------
Eddy current examination combined with Eddy current--In Any crack in the neck of 5
visual inspection. conformance with 2 thread lengths or more.
appendix C of this part.
Visual inspection--In
conformance with CGA C-
6.1 (IBR; see Sec.
171.7 of this
subchapter).
----------------------------------------------------------------------------------------------------------------
\1\ The requalifier performing eddy current must be familiar with the eddy current equipment and must
standardize (calibrate) the system in accordance with the requirements provided in appendix C to this part.
\2\ The eddy current must be applied from the inside of the cylinder's neck to detect any sustained load
cracking that has expanded into the neck threads.

[[Page 49020]]

(1) Examination procedure. Each facility performing eddy current
examination with visual inspection must develop, update, and maintain a
written examination procedure applicable to the test equipment it uses
to perform eddy current examinations.
(2) Visual examinations. Visual examinations of the neck and
shoulder area of the cylinder must be conducted in conformance with CGA
C-6.1 (IBR, see Sec. 171.7 of this subchapter).
(3) Condemnation criteria. A cylinder must be condemned if the eddy
current examination combined with visual examination reveals any crack
in the neck of two thread lengths or more, or if visual inspection
reveals any crack in the neck or shoulder area.
0
48. In Sec. 180.211, revise paragraphs (c) and (e)(1) to read as
follows:

Sec. 180.211 Repair, rebuilding and reheat treatment of DOT-4 series
specification cylinders.

* * * * *
(c) Additional requirements for the repair or recondition of a DOT-
4L cylinder. (1) Repairs to a DOT-4L welded insulated cylinder must be
performed in conformance with paragraphs (a) and (b) of this section
with the exception that other welding procedures permitted by CGA C-3
(IBR, see Sec. 171.7 of this subchapter), and not excluded by the
definition of ``rebuild,'' are authorized. DOT 4L cylinders must meet
additional requirements for repair specified in Sec. 180.211(c),
including being pressure-tested in conformance with the specifications
under which the cylinder was originally manufactured. DOT 4L cylinders
that undergo procedures not defined as a repair in Sec. 180.203 are
not subject to the requirements of Sec. 180.211(c), including the
requirement to be pressure-tested in conformance with the
specifications under which the cylinder was originally manufactured.
(2) After repair, the cylinder must be--
(i) Pressure tested in accordance with the specifications under
which the cylinder was originally manufactured;
(ii) Leak tested before and after assembly of the insulation jacket
using a mass spectrometer detection system; and
(iii) Tested for heat conductivity requirements.
(3) Reconditioning of a DOT 4L welded insulated cylinder must be
performed in accordance with paragraphs (a) and (b) of this section.
Reconditioning applies to the work other than repair as described in
paragraphs (c)(1) and (c)(2) of this section and that work is performed
on parts other than the inner containment vessel (cylinder). Work to
recondition a DOT 4L welded insulated cylinder includes the following:
(i) The removal of either end of the insulation jacket.
(ii) The replacement of the neck tube. At least a 13 mm (0.51 inch)
piece of the original neck tube must be protruding above the cylinder's
top end. The original weld attaching the neck tube to the cylinder must
be sound, and the replacement neck tube must be welded to this
remaining piece of the original neck tube.
(iii) The replacement of material such as, but not limited to, the
insulating material and the piping system within the insulation space
with materials that are identical to those used in the original
manufacture of the cylinder.
(4) After reconditioning as described in paragraph (c)(3) of this
section, the welded cylinder must be:
(i) Pneumatically leak tested, to the closure point of all piping
and gauging systems, to 90% of the service pressure or the relief valve
set point, whichever is less;
(ii) Leak tested before and after assembly of the insulation jacket
using a mass spectrometer detection system; and
(iii) Tested for heat conductivity requirements.
* * * * *
(e) * * *
(1) The rebuilding of a DOT 4L welded insulated cylinder must be
performed in conformance with paragraph (d) of this section. DOT-4
series cylinders requiring rebuild (e.g., when the inner vessel is
compromised), as defined in Sec. 180.203, must do so in conformance
with Sec. 180.211. DOT 4L cylinders which undergo procedures that are
not defined as a rebuild in Sec. 180.203 are not subject to the
requirements of Sec. 180.203(e). Rebuilding of a DOT-4L welded
insulated cylinder also includes:
(i) Substituting or adding material in the insulation space not
identical to that used in the original manufacture of that cylinder, or
(ii) Making a weld repair not to exceed 150 mm (5.9 inches) in
length on the longitudinal seam of the cylinder or 300 mm (11.8 inches)
in length on a circumferential weld joint of the cylinder.
* * * * *
0
49. In Sec. 180.212, add paragraph (a)(3) to read as follows:

Sec. 180.212 Repair of seamless DOT 3-series specification cylinders
and seamless UN pressure receptacles.

(a) * * *
(3) If grinding is performed on a DOT 3-series cylinder or a
seamless UN pressure receptacle, the following conditions apply after
grinding has been completed. Grinding must not be used to remove arc
burns from a cylinder as such a cylinder must be condemned:
(i) Ultrasonic examination must be conducted to ensure that the
wall thickness is not less than the minimum design requirement. The
wall thickness must be measured in at least 3 different areas for every
10 square inches of grinding area.
(ii) The cylinder must be requalified in conformance with Sec.
180.205 of this subpart.
(iii) The cylinder must be marked in accordance with Sec.
180.213(f)(10) of this subpart to indicate compliance with this
paragraph (a)(3).
* * * * *
0
50. In Sec. 180.213, revise paragraphs (c) and (d)(2), and add
paragraphs (f)(10), (f)(11), and (g) to read as follows:

Sec. 180.213 Requalification markings.

* * * * *
(c) Requalification marking method. (1) The depth of
requalification markings may not be greater than specified in the
applicable specification. The markings must be made by stamping,
engraving, scribing or other method that produces a legible, durable
mark.
(i) Requalification marks must begin at the top of the space
provided, immediately to the right of the original manufacture date of
the cylinder, as space allows. Subsequent retest dates must go
immediately below the previous date, continuing down in sequential
order to the bottom of the shoulder or area provided for marking.
Retest marks must proceed further in columns to the right of the last
column markings.
(ii) Except as provided in part 178 of this subchapter, stamping on
the sidewall is prohibited.
(2) A cylinder used as a fire extinguisher (Sec. 180.209(j) of
this subpart) may be marked by using a pressure sensitive label.
(3) For a DOT 3HT cylinder, when stamped, the test date and RIN
must be applied by low-stress steel stamps to a depth no greater than
that prescribed at the time of manufacture. Stamping on the sidewall is
not authorized.
(4) For a composite cylinder, the requalification markings must be
applied on a pressure sensitive label, securely affixed and overcoated
with epoxy in a manner prescribed by the cylinder manufacturer, near
the original manufacturer's label. Stamping of the composite surface is
not authorized.

[[Page 49021]]

(d) * * *
(2) A cylinder subject to the requirements of Sec. 171.23(a)(4) of
this subchapter must be marked with the date and RIN in accordance with
this paragraph (d) and paragraph (f)(11) of this section, or marked in
accordance with the requalification authorized by the Associate
Administrator in accordance with Sec. 171.23(a)(4)(i) of this
subchapter.
* * * * *
(f) * * *
(10) For designation of grinding with ultrasonic wall thickness
examination, the marking is as illustrated in paragraph (d) of this
section, except the ``X'' is replaced with the letter ``R''.
(11) For designation of requalification of a foreign cylinder
requalified in conformance with Sec. Sec. 171.23(a)(4) and 180.209(l)
of this subchapter, the marking is as illustrated in paragraph (d) of
this section, except that the ``X'' is replaced with the letters
``EX''.
(g) Visual inspection requalification markings. Alternative to the
marking requirements of paragraph (d) and (f)(5) of this section, each
cylinder successfully passing a visual inspection only, in accordance
with Sec. 180.209(g) of this subpart, may be marked with the visual
inspection number (e.g., V123456) issued to a person performing visual
inspections. An example of the manner in which the markings may be
applied is as follows:

------------------------------------------------------------------------

------------------------------------------------------------------------
V123 V123456
03 14E 0314 E
654
0314 E V123456 V123456 0314E
------------------------------------------------------------------------

Where:

``03'' is the month of requalification (the additional numeral ``0''
is optional'')
``V123456'' is the RIN
``14'' is the year of requalification; and
``E'' to indicate visual inspection
0
51. In Sec. 180.215, revise paragraph (b) and (c)(2)(vii), and add
(c)(3) to read as follows:

Sec. 180.215 Reporting and record retention requirements.

* * * * *
(b) Requalification records. Daily records of visual inspection,
pressure test, eddy current examination if required, and ultrasonic
examination if permitted under a special permit, as applicable, must be
maintained by the person who performs the requalification until either
the expiration of the requalification period or until the cylinder is
again requalified, whichever occurs first. A single date may be used
for each test sheet, provided each test on the sheet was conducted on
that date. Ditto marks or a solid vertical line may be used to indicate
repetition of the preceding entry for the following entries only: date;
actual dimensions; manufacturer's name or symbol, if present; owner's
name or symbol, if present; and test operator. Blank spaces may not be
used to indicate repetition of a prior entry. A symbol may be used for
the actual dimensions if there is a reference chart available at the
facility that lists the actual dimensions of every symbol used. The
records must include the following information:
(1) Calibration test records. For each test to demonstrate
calibration, the date; serial number of the calibrated cylinder;
calibration test pressure; total, elastic and permanent expansions; and
legible identification of test operator. The test operator must be able
to demonstrate that the results of the daily calibration verification
correspond to the hydrostatic tests performed on that day. The daily
verification of calibration(s) may be recorded on the same sheets as,
and with, test records for that date, or may be recorded on a separate
sheet.
(2) Pressure test and visual inspection records. The date of
requalification; serial number; DOT-specification or special permit
number; marked pressure; actual dimensions; manufacturer's name or
symbol, if present; date of manufacture; owner's name or symbol, if
present; gas service; result of visual inspection; actual test
pressure; total, elastic and permanent expansions; percent permanent
expansion; disposition, with reason for any repeated test, rejection or
condemnation; and legible identification of test operator. For each
cylinder marked pursuant to Sec. 173.302a(b)(5) of this subchapter,
the test sheet must indicate the method by which any average or maximum
wall stress was computed. Records must be kept for all completed, as
well as unsuccessful tests. The entry for a repeated test must indicate
the date of the earlier test, if conducted on a different day.
(3) Wall stress. Calculations of average and maximum wall stress
pursuant to Sec. Sec. 173.302a(b)(3) and 180.209(b)(1) of this
subchapter, if performed.
(4) Calibration certificates. The most recent certificate of
calibration must be maintained for each calibrated cylinder, pressure
indicating device, and expansion indicating device.
(5) Eddy current examination records. (i) Records of eddy current
inspection equipment must contain the following information:
(A) Equipment manufacturer, model number, and serial number.
(B) Probe description and unique identification (e.g., serial
number, part number, etc.).
(C) Specification of each standard reference ring used to perform
the eddy current examination.
(ii) Eddy current examination records must contain the following
information:
(A) DOT-specification or special permit number of the cylinder;
manufacturer's name or symbol; owner's name or symbol, if present;
serial number, and date of manufacture.
(B) Identification of each standard reference ring used to perform
the eddy current examination.
(C) Name of test operator performing the eddy current examination.
(D) Date of eddy current examination.
(E) Acceptance/condemnation results (e.g., pass or fail).
(F) Retester identification number.
(c) * * *
(2) * * *
(vii) Results of a test on a cylinder, including test method, test
pressure, total expansion, permanent expansion, elastic expansion,
percent permanent expansion (permanent expansion may not exceed ten
percent (10 percent) of total expansion), and volumetric capacity
(volumetric capacity of a rebuilt cylinder must be within 3
percent of the calculated capacity);
* * * * *
(3) A record of grinding and ultrasonic examination in conformance
with Sec. 180.212(a)(3) of this subpart must be completed for each
cylinder on which grinding is performed. The record must be clear,
legible, and contain the following information:
(i) Name and address of the test facility, date of test report, and
name or original manufacturer;
(ii) Marks stamped on cylinder to include specification number,
service pressure, serial number, symbol of manufacturer, and date of
manufacture;
(iii) Cylinder outside diameter and length in inches;
(iv) Detailed map of where the grinding was performed on the
cylinder; and
(v) Wall thickness measurements in grind area in conformance with
Sec. 180.212(a)(3)(i).
* * * * *
0
52. In appendix C to part 180, the heading and paragraph 1 are revised
to read as follows:

[[Page 49022]]

APPENDIX C TO PART 180--EDDY CURRENT EQUIPMENT REQUIREMENTS FOR
INSPECTION OF DOT 3AL CYLINDERS MANUFACTURED OF ALUMINUM ALLOY 6351-T6

1. Equipment calibration. Each facility performing an eddy
current examination must develop, update, and maintain a written
calibration procedure applicable to the test equipment it uses to
perform eddy current examinations.
* * * * *

Issued in Washington, DC on July 11, 2016, under authority
delegated in 49 CFR 1.97.
William Schoonover,
Acting Associate Administrator for Hazardous Materials Safety, Pipeline
and Hazardous Materials Safety Administration.

[FR Doc. 2016-16689 Filed 7-25-16; 8:45 am]
BILLING CODE 4910-60-P

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