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