HAR 6-77-144 General requirements

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 Class location │ percentage of SMYS │ Natural gas │ Air or inert gas │ │ 1.................│ 80 │ 80 2.................│ 30 │ 75 3.................│ 30 │ 50 4.................│ 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. [Eff 49#

C.F.R. '192.503, October 1, 1990) ] (Auth: HRS '269-6) (Imp:#