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 The requirements contained in 49 CFR 192.509(b), which is adopted by reference in R 460.20606, are superseded by both of the following provisions:#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