# HAR 6-77-181 Transmission lines: permanent field repair of leaks

- **operation:** document
- **citation:** HAR 6-77-181
- **title:** HAR 6-77-181 Transmission lines: permanent field repair of leaks
- **source type:** regulation
- **agency:** Hawaii Public Utilities Commission
- **status:** current
- **official:** true
- **published on:** 1994-04-15
- **effective on:** 1994-09-03
- **summary:** in subsection (b), each permanent field repair of a leak on a transmission line must be made as follows: (1) If feasible, the segment of transmission line must be taken out of service and repaired by cutting out a cylindrical piece of pipe and replacing it with pipe of similar or greater design stre
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- **app url:** https://regulus.evalyn.ai/document/hi-har-har-6-77-181
- **source url:** https://puc.hawaii.gov/wp-content/uploads/2026/04/HAR-6-77-Transp-of-Gas-03-31-2026.pdf
**body:**

in subsection (b), each permanent field repair of a leak on a transmission line must be made as follows: (1) If feasible, the segment of transmission line must be taken out of service and repaired by cutting out a cylindrical piece of pipe and replacing it with pipe of similar or greater design strength; (2) If it is not feasible to take the segment of transmission line out of service, repairs must be made by installing a full encirclement welded split sleeve of appropriate design, unless the transmission line: (A) Is jointed by mechanical couplings; and (B) Operates at less than forty percent of SMYS; (3) If the leak is due to a corrosion pit, the repair may be made by installing a properly designed bolt-on-leak clamp; or, if the leak is due to a corrosion pit and on pipe of not more than 40,000 p.s.i. SMYS, the repair may be made by fillet welding over the pitted area a steel plate patch with rounded corners, of the same or greater thickness than the pipe, and not more than one-half of the diameter of the pipe in size. (b) Submerged offshore pipelines and submerged pipelines in inland navigable waters may be repaired by mechanically applying a full encirclement split sleeve of appropriate design over the leak. [Eff ] (Auth: HRS '269-6) (Imp: 49 C.F.R. '192.717, October 1, 1990)
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- **body characters:** 1300