Pipeline and Hazardous Materials Safety Administration March 2008 – Federal Register Recent Federal Regulation Documents

This interim final rule conforms PHMSA's administrative procedures with the Pipeline Inspection, Protection, Enforcement, and Safety Act of 2006 (PIPES Act) by establishing the procedures PHMSA will follow in issuing safety orders and handling requests for special permits, including emergency special permits. This interim final rule also notifies operators about electronic docket information availability; updates addresses, telephone numbers, and routing symbols; and clarifies the time period for processing requests for written interpretations of the regulations. This interim final rule does not impose any new operating, maintenance, or other substantive requirements on pipeline owners or operators.

In accordance with the procedures governing the application for, and the processing of, special permits from the Department of Transportation's Hazardous Material Regulations (49 CFR Part 107, Subpart B), notice is hereby given that the Office of Hazardous Materials Safety has received the application described herein. Each mode of transportation for which a particular special permit is requested is indicated by a number in the ``Nature of Application'' portion of the table below as follows: 1Motor vehicle, 2Rail freight, 3Cargo vessel, 4Cargo aircraft only, 5Passenger-carrying aircraft.

PHMSA proposes to amend the pipeline safety regulations to prescribe safety requirements for the operation of certain gas transmission pipelines at pressures based on higher stress levels. The result would be an increase of maximum allowable operating pressure (MAOP) over that currently allowed in the regulations. This action would update regulatory standards to reflect improvements in pipeline materials, assessment tools, and maintenance practices, which together have significantly reduced the risk of failure in steel pipeline fabricated and installed over the last twenty-five years. The proposed rule would allow use of an established industry standard for the calculation of MAOP, but limit application of the standard to pipelines posing a low safety risk based on location, materials, and construction. The proposed rule would generate significant public benefits by boosting the potential capacity and efficiency of pipeline infrastructure, while promoting investment in improved pipe technology and rigorous life- cycle maintenance.

Recent events concerning failures of mechanical couplings and related appurtenances have raised concerns about safety in natural gas distribution systems. This notice updates information provided in Advisory Bulletin ADB-86-02 and advises owners and operators of gas pipelines to consider the potential failure modes for mechanical couplings used for joining and pressure sealing two pipes together. Failures can occur when there is inadequate restraint for the potential stresses on the two pipes, when the couplings are incorrectly installed or supported, or when the coupling components such as elastomers degrade over time. In addition, inadequate leak surveys which fail to identify leaks requiring immediate repair can lead to more serious incidents. This notice urges operators to review their procedures for using mechanical couplings and ensure coupling design, installation procedures, leak survey procedures, and personnel qualifications meet Federal requirements. Operators should work with Federal and State pipeline safety representatives, manufacturers, and industry partners to determine how best to resolve potential issues in their respective state or region. Documented repair or replacement programs may prove beneficial to all stakeholders involved.