Wrinkle Bends in Steel Pipe [49 CFR 192.315]

(A)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. [49 CFR 192.315(a)]#

(B)B. Each wrinkle bend on steel pipe must comply with the following. [49 CFR 192.315(b)]#

(1)1. The bend must not have any sharp kinks. [49 CFR 192.315(b)(1)]#

(2)2. When measured along the crotch of the bend, the wrinkles must be a distance of at least one pipe diameter. [49 CFR 192.315(b)(2)]#

(3)3. On pipe 16 inches (406 millimeters) or larger in diameter, the bend may not have a deflection of more than 1 1/2º for each wrinkle. [49 CFR 192.315(b)(3)]#

(4)4. On pipe containing a longitudinal weld the longitudinal seam must be as near as practicable to the neutral axis of the bend. [49 CFR 192.315(b)(4)]#

AUTHORITY NOTE: Promulgated in accordance with R.S. 30:501 et seq.#

HISTORICAL NOTE: Promulgated by the Department of Natural Resources, Office of Conservation, LR 9:232 (April 1983), amended LR 10:525 (July 1984), LR 27:1542 (September 2001), LR 30:1246 (June 2004).#