# HAR 6-77-146 Test requirements for pipelines to operate at a hoop stress less than thirty

- **operation:** document
- **citation:** HAR 6-77-146
- **title:** HAR 6-77-146 Test requirements for pipelines to operate at a hoop stress less than thirty
- **source type:** regulation
- **agency:** Hawaii Public Utilities Commission
- **status:** current
- **official:** true
- **published on:** 1994-04-15
- **effective on:** 1994-09-03
- **summary:** percent of SMYS and at or above 100 p.s.i.g. Except for service lines and plastic pipelines, each segment of a pipeline that is to be operated at a hoop stress less than thirty percent of SMYS and at or above 100 p.s.i.g. must be tested in accordance with the following: (1) The pipeline operator mus
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**body:**

percent of SMYS and at or above 100 p.s.i.g. Except for service lines and plastic pipelines, each segment of a pipeline that is to be operated at a hoop stress less than thirty percent of SMYS and at or above 100 p.s.i.g. must be tested in accordance with the following: (1) The pipeline operator must use a test procedure that will ensure discovery of all potentially hazardous leaks in the segment being tested; (2) If, during the test, the segment is to be stressed to twenty percent or more of SMYS and natural gas, inert gas, or air is the test medium: (A) A leak test must be made at a pressure between 100 p.s.i.g. and the pressure required to produce a hoop stress of 20 percent of SMYS; or (B) The line must be walked to check for leaks while the hoop stress is held at approximately twenty percent of SMYS; (3) The pressure must be maintained at or above the test pressure for at least ] (Auth: HRS '269-6) (Imp: 49 C.F.R. '192.507, October 1, one hour. [Eff 1990)
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