Hawaii Administrative Rules
Title 6 - DEPARTMENT OF BUDGET AND FINANCE
Division - PUBLIC UTILITIES COMMISSION
Chapter 77 - TRANSPORTATION OF NATURAL AND OTHER GAS BY PIPELINE; MINIMUM SAFETY STANDARDS
Subchapter 15 - MAINTENANCE
Section 6-77-180 - Transmission lines: permanent field repair of welds
Universal Citation: HI Admin Rules 6-77-180
Current through August, 2024
Each weld that is 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.
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