New York Codes, Rules and Regulations
Title 17 - DEPARTMENT OF TRANSPORTATION
Chapter VI - Transportation Regulations
Subchapter F - Railroad And Street Railroad Corporations
Article 2 - Safety
Part 922 - Locomotive Boilers And Steam Reservoirs
Section 922.10 - Staybolt testing

Universal Citation: 17 NY Comp Codes Rules and Regs ยง 922.10

Current through Register Vol. 46, No. 39, September 25, 2024

(a) Time of testing rigid bolts. All staybolts shall be tested at least once each month. Staybolts shall also be tested immediately after every hydrostatic test.

(b) Method of testing rigid bolts. The inspector must tap each bolt from the firebox side and determine the broken bolts from the sound or from the vibration of the sheet. If staybolt tests are made when the boiler is filled with water, there must be not less than 50 pounds pressure on the boiler. Should the boiler not be under pressure, the test may be made after draining all the water from the boiler, in which case the vibration of the sheet will indicate any unsoundness. The latter test is preferable.

(c)

(1) Method of testing flexible staybolts with caps. Except as provided in paragraph (2) hereof, all staybolts having caps over the outer ends shall have the caps removed at least once every two years and the bolts and sleeves examined for breakage. Each time the hydrostatic test is applied the hammer test required by subdivisions (a) and (b) of this section shall be made while the boiler is under hydrostatic pressure not less than the allowed working pressure.

(2) When all flexible staybolts with which any boiler is equipped are provided with a telltale hole not less than 3/16 inch nor more than 7/32 inch in diameter, extending the entire length of the bolt and into the head not less than one third of its diameter, and these holes are protected from becoming closed by rust and corrosion by copper plating or other approved method, and are opened and tested, each time the hydrostatic test is applied, with an electric or other instrument that will positively indicate when the telltale holes are open their entire length, the caps will not be required to be removed. When this test is completed the hydrostatic test must be applied and all staybolts removed which show leakage through the telltale hole.

The inner ends of the telltale holes must be kept closed with a fireproof porous material that will exclude foreign matter and permit leakage of steam or water, if the bolt is broken or fractured, into the telltale hole. When this test is completed the ends of the telltale holes shall be closed with material of different color than that removed and a record kept of colors used.

(3) Firebox sheets must be carefully examined at least once every month for mud burn, bulging and indications of broken staybolts.

(4) Staybolt caps shall be removed or any of the above tests made whenever the commissioner's inspector or the operator's inspector considers it desirable in order to thoroughly determine the condition of staybolts or staybolt sleeves.

(d) Method of testing flexible staybolts without caps. Flexible staybolts which do not have caps shall be tested at least once each month the same as rigid bolts. Each time a hydrostatic test is applied such staybolt test shall be made while the boiler is under hydrostatic pressure not less than the allowed working pressure, and proper notation of such test shall be made on the certificate of inspection.

(e) Broken staybolts. No boiler shall be allowed to remain in service when there are two adjacent staybolts broken or plugged in any part of the firebox or combustion chamber, nor when three or more are broken or plugged in a circle four feet in diameter, nor when five or more are broken or plugged in the entire boiler.

(f) Telltale holes. All staybolts shorter than eight inches, except flexible bolts, shall have telltale holes 3/16 inch in diameter and not less than one and one-quarter inches deep in the outer end. These holes must be kept open at all times.

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