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 12 - TEST REQUIREMENTS
Section 6-77-144 - General requirements
Universal Citation: HI Admin Rules 6-77-144
Current through August, 2024
(a) No person may operate a new segment of pipeline, or return to service a segment of pipeline that has been relocated or replaced, until:
(1) It has been tested in accordance with
this subchapter and section 6-77-166 to substantiate the maximum allowable
operating pressure; and
(2) Each
potentially hazardous leak has been located and eliminated.
(b) The test medium must be liquid, air, natural gas, or inert gas that is:
(1) Compatible with the material of which the
pipeline is constructed;
(2)
Relatively free of sedimentary materials; and
(3) Except for natural gas,
nonflammable.
(c) Except as provided in section 6-77-145(a), if air, natural gas, or inert gas is used as the test medium, the following maximum hoop stress limitations apply:
| Maximum hoop stress allowed as percentage of SMYS | ||
| Class location | | Natural gas | | Air or inert gas |
| | | | | |
| 1 ................ | I 80 | | 80 |
| 2 ................ | I 30 | | 75 |
| 3 ................ | I 30 | | 50 |
| 4 ................ | I 30 | | 40 |
(d) Each joint used to tie in a test segment of pipeline is excepted from the specific test requirements of this subchapter, but each non-welded joint must be leak tested at not less than its operating pressure.
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