# Wrinkle Bends in Steel Pipe [49 CFR 192.315]

- **operation:** document
- **citation:** LAC 43:XIII §1715
- **title:** Wrinkle Bends in Steel Pipe [49 CFR 192.315]
- **source type:** regulation
- **agency:** Louisiana Office of Conservation
- **status:** current
- **official:** true
- **published on:** Not available
- **effective on:** Not available
- **summary:** 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. Each wrinkle bend on steel pipe must comply with the following. [49 CFR 192.315(b)] 1. The bend must not have any sharp kinks. [49 CFR 192.
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- **app url:** https://regulus.evalyn.ai/document/la-lac-43-xiii-1715
- **source url:** https://www.doa.la.gov/doa/osr/louisiana-administrative-code/
**body:**

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

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

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. 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. 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).
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