{"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}