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