Haw. Code R. § 6-77-144 - General requirements

(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.

Notes

Haw. Code R. § 6-77-144

[Eff ] (Auth: HRS § 269-6) (Imp: 49C.F.R. §192.503, OCT 1, 1990)