49 C.F.R. § 192.315 Wrinkle bends in steel pipe.
Title 49 - Transportation
(a) A wrinkle bend may not be made on steel pipe to be operated at a pressure that produces a hoop stress of 30 percent, or more, of SMYS. (b) Each wrinkle bend on steel pipe must comply with the following: (1) The bend must not have any sharp kinks. (2) When measured along the crotch of the bend, the wrinkles must be a distance of at least one pipe diameter. (3) On pipe 16 inches (406 millimeters) or larger in diameter, the bend may not have a deflection of more than 1 (4) On pipe containing a longitudinal weld the longitudinal seam must be as near as practicable to the neutral axis of the bend. [35 FR 13257, Aug. 19, 1970, as amended by Amdt. 192–85, 63 FR 37503, July 13, 1998]
Title 49: Transportation
PART 192—TRANSPORTATION OF NATURAL AND OTHER GAS BY PIPELINE: MINIMUM FEDERAL SAFETY STANDARDS
Subpart G—General Construction Requirements for Transmission Lines and Mains
§ 192.315 Wrinkle bends in steel pipe.
