# HAR 6-77-179 Transmission lines: permanent field repair of imperfections and damages

- **operation:** document
- **citation:** HAR 6-77-179
- **title:** HAR 6-77-179 Transmission lines: permanent field repair of imperfections and damages
- **source type:** regulation
- **agency:** Hawaii Public Utilities Commission
- **status:** current
- **official:** true
- **published on:** 1994-04-15
- **effective on:** 1994-09-03
- **summary:** (a) Except as provided in subsection (b), each imperfection or damage that impairs the serviceability of a segment of steel transmission line operating at or above forty percent of SMYS must be repaired as follows: (1) If it is feasible to take the segment out of service, the imperfection or damage 
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- **source url:** https://puc.hawaii.gov/wp-content/uploads/2026/04/HAR-6-77-Transp-of-Gas-03-31-2026.pdf
**body:**

(a) Except as provided in subsection (b), each imperfection or damage that impairs the serviceability of a segment of steel transmission line operating at or above forty percent of SMYS must be repaired as follows: (1) If it is feasible to take the segment out of service, the imperfection or damage must be removed 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 out of service, a full encirclement welded split sleeve of appropriate design must be applied over the imperfection or damage; and (3) If the segment is not taken out service, the operating pressure must be reduced to a safe level during the repair operations. (b) Submerged offshore pipelines and submerged pipelines in inland navigable waters may be repaired by mechanically applying a fully encirclement split sleeve of appropriate design over the imperfection or damage. [Eff ] (Auth: HRS '269- 6) (Imp: 49 C.F.R. '192.713, October 1, 1990)
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