# HAR 6-77-180 Transmission lines: permanent field repair of welds

- **operation:** document
- **citation:** HAR 6-77-180
- **title:** HAR 6-77-180 Transmission lines: permanent field repair of welds
- **source type:** regulation
- **agency:** Hawaii Public Utilities Commission
- **status:** current
- **official:** true
- **published on:** 1994-04-15
- **effective on:** 1994-09-03
- **summary:** unacceptable under section 6-77-80(c) must be repaired as follows: (1) If it is feasible to take the segment of transmission line out of service, the weld must be repaired in accordance with the applicable requirements of section 6-77-82. (2) A weld may be repaired in accordance with section 6-77-82
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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:**

unacceptable under section 6-77-80(c) must be repaired as follows: (1) If it is feasible to take the segment of transmission line out of service, the weld must be repaired in accordance with the applicable requirements of section 6-77-82. (2) A weld may be repaired in accordance with section 6-77-82 while the segment of transmission line is in service if: (A) The weld is not leaking; (B) The pressure in the segment is reduced so that it does not produce a stress that is more than twenty percent of the SMYS of the pipe; and (C) Grinding of the defective area can be limited so that at least 1/8-inch thickness in the pipe weld remains; (3) A defective weld which cannot be repaired in accordance with paragraph (1) or (2) must be repaired by installing a full encirclement welded split sleeve of appropriate design. [Eff ] (Auth: HRS '269-6) (Imp: 49 C.F.R. '192.715, October 1, 1990)
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