Test Requirements for pipelines operating below 100 psig

Rule 311. The requirements contained in 49 CFR 192.509(b), which is adopted by reference in R 460.20606, are superseded by both of the following provisions:

(a) An operator shall ensure that all mains are to be pressured tested to at least 90 psig or 1 ½ times the proposed maximum allowable operating pressure, whichever is greater.

(b) An operator shall ensure that the test pressure is maintained at or above the test pressure requirement for the pipeline being tested for not less than 1 hour. However, the operator shall test a relatively short segment for not less than 30 minutes.

History: 1998-2000 AACS; 2022 AACS.