Frequently-Asked Question FAQ #69

FAQ-69: 20 percent reduction

Question: Is a 20 percent reduction in pressure an adequate interim measure for immediate repair conditions?

Answer: Yes. The rule specifies that the temporary pressure reduction be determined using ASME/ANSI B31G or RSTRENG or that pressure must be reduced to a level not exceeding 80 percent of the level at the time the condition was discovered.

These Frequently Asked Questions (FAQs) are intended to clarify, explain, and promote better understanding of the pipeline integrity management rules. These FAQs are not substantive rules and do not create rights, assign duties, or impose new obligations not outlined in the existing integrity management regulations and standards. Requests for informal interpretations regarding the applicability of one or more of the pipeline integrity management rules to a specific situation may be submitted to PHMSA in accordance with 49 C.F.R. § 190.11.

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