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

Current through Register Vol. 46, No. 28, July 10, 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.