# HAR 6-77-96 Repair of steel pipe

- **operation:** document
- **citation:** HAR 6-77-96
- **title:** HAR 6-77-96 Repair of steel pipe
- **source type:** regulation
- **agency:** Hawaii Public Utilities Commission
- **status:** current
- **official:** true
- **published on:** 1994-04-15
- **effective on:** 1994-09-03
- **summary:** 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 
- **machine formats:** - **json:** https://regulus.evalyn.ai/document/hi-har-har-6-77-96.json
- **markdown:** https://regulus.evalyn.ai/document/hi-har-har-6-77-96.md
- **app url:** https://regulus.evalyn.ai/document/hi-har-har-6-77-96
- **source url:** https://puc.hawaii.gov/wp-content/uploads/2026/04/HAR-6-77-Transp-of-Gas-03-31-2026.pdf
**body:**

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 twenty percent, or more, of SMYS: (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; and (3) In pipe to be operated at a pressure that produces a hoop stress of forty percent or more of SMYS, a dent that has a depth of: (A) More than one-quarter inch in pipe 12-3/4 inches or less in outer diameter; or (B) More than two percent of the nominal pipe diameter in pipe over 12-3/4 inches in outer diameter. For the purpose of this subsection a "dent" is a depression that produces a gross disturbance in the curvature of the pipe wall without reducing the pipe-wall thickness. The depth of a dent is measured as the gap between the lowest point of the dent and a prolongation of the original contour of the pipe. (c) Each arc burn on steel pipe to be operated at a pressure that produces a hoop stress of forty 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. [Eff ] (Auth: HRS '269-6) (Imp: 49 C.F.R. '192.309, October 1, 1990)
- **truncated:** false
- **body characters:** 2114