---
kind: "section"
citation: "49 C.F.R. § 192.309"
title: "49"
number: "192.309"
heading: "Repair of steel pipe."
url: "https://uscodex.org/cfr/49/192.309"
---

# §192.309. Repair of steel pipe.

- (a) Each imperfection or damage that impairs the serviceability of a length of steel pipe must be repaired or removed. If a repair is made by grinding, the remaining wall thickness must at least be equal to either:
  - (1) The minimum thickness required by the tolerances in the specification to which the pipe was manufactured; or
  - (2) **The nominal wall thickness required for the design pressure of the pipeline.**
- (b) Each of the following dents must be removed from steel pipe to be operated at a pressure that produces a hoop stress of 20 percent, or more, of SMYS, unless the dent is repaired by a method that reliable engineering tests and analyses show can permanently restore the serviceability of the pipe:
  - (1) **A dent that contains a stress concentrator such as a scratch, gouge, groove, or arc burn.**
  - (2) **A dent that affects the longitudinal weld or a circumferential weld.**
  - (3) In pipe to be operated at a pressure that produces a hoop stress of 40 percent or more of SMYS, a dent that has a depth of:
    - (i) More than 1/4 inch (6.4 millimeters) in pipe 12 3/4 inches (324 millimeters) or less in outer diameter; or
    - (ii) More than 2 percent of the nominal pipe diameter in pipe over 12 3/4 inches (324 millimeters) in outer diameter.
- (c) Each arc burn on steel pipe to be operated at a pressure that produces a hoop stress of 40 percent, or more, of SMYS must be repaired or removed. If a repair is made by grinding, the arc burn must be completely removed and the remaining wall thickness must be at least equal to either:
  - (1) The minimum wall thickness required by the tolerances in the specification to which the pipe was manufactured; or
  - (2) **The nominal wall thickness required for the design pressure of the pipeline.**
- (d) A gouge, groove, arc burn, or dent may not be repaired by insert patching or by pounding out.
- (e) Each gouge, groove, arc burn, or dent that is removed from a length of pipe must be removed by cutting out the damaged portion as a cylinder.

## Notes

### Amendments

[35 FR 13257, Aug. 19, 1970, as amended by Amdt. 192-1, 35 FR 17660, Nov. 17, 1970; Amdt. 192-85, 63 FR 37503, July 13, 1998; Amdt. 192-88, 64 FR 69664, Dec. 14, 1999]

### Authority

Authority: 30 U.S.C. 185(w)(3), 49 U.S.C. 5103, 60101 et. seq., and 49 CFR 1.97.

### Source

Source: 35 FR 13257, Aug. 19, 1970, unless otherwise noted.

### Amendments

[35 FR 13257, Aug. 19, 1970, as amended by Amdt. 192-1, 35 FR 17660, Nov. 17, 1970; Amdt. 192-85, 63 FR 37503, July 13, 1998; Amdt. 192-88, 64 FR 69664, Dec. 14, 1999]