{"operation":"document","citation":"49 CFR 192.313","title":"Bends and elbows.","source_type":"regulation","agency":"Pipeline and Hazardous Materials Safety Administration","status":"current","official":true,"published_on":null,"effective_on":"2026-08-18","summary":"(a) Each field bend in steel pipe, other than a wrinkle bend made in accordance with § 192.315, must comply with the following:\n\n(1) A bend must not impair the serviceability of the pipe.\n\n(2) Each bend must have a smooth contour and be free from buckling, cracks, or any other mechanical damage.\n\n(3","machine_formats":{"json":"https://regulus.evalyn.ai/document/49-cfr-192-313.json","markdown":"https://regulus.evalyn.ai/document/49-cfr-192-313.md"},"app_url":"https://regulus.evalyn.ai/document/49-cfr-192-313","source_url":"https://www.ecfr.gov/on/2026-08-18/title-49/section-192.313","body":"(a) Each field bend in steel pipe, other than a wrinkle bend made in accordance with § 192.315, must comply with the following:\n\n(1) A bend must not impair the serviceability of the pipe.\n\n(2) Each bend must have a smooth contour and be free from buckling, cracks, or any other mechanical damage.\n\n(3) On pipe containing a longitudinal weld, the longitudinal weld must be as near as practicable to the neutral axis of the bend unless:\n\n(i) The bend is made with an internal bending mandrel; or\n\n(ii) The pipe is 12 inches (305 millimeters) or less in outside diameter or has a diameter to wall thickness ratio less than 70.\n\n(b) Each circumferential weld of steel pipe which is located where the stress during bending causes a permanent deformation in the pipe must be nondestructively tested either before or after the bending process.\n\n(c) Wrought-steel welding elbows and transverse segments of these elbows may not be used for changes in direction on steel pipe that is 2 inches (51 millimeters) or more in diameter unless the arc length, as measured along the crotch, is at least 1 inch (25 millimeters).\n\n(d) An operator may not install plastic pipe with a bend radius that is less than the minimum bend radius specified by the manufacturer for the diameter of the pipe being installed.\n\n[Amdt. 192-26, 41 FR 26018, June 24, 1976, as amended by Amdt. 192-29, 42 FR 42866, Aug. 25, 1977; Amdt. 192-29, 42 FR 60148, Nov. 25, 1977; Amdt. 192-49, 50 FR 13225, Apr. 3, 1985; Amdt. 192-85, 63 FR 37503, July 13, 1998; Amdt. 192-124, 83 FR 58718, Nov. 20, 2018]","truncated":false,"body_characters":1560}