ASMEB31 8S Risk Modeling Summary

The ASME B31.8 Committee is open to improvements and new suggestions. We anticipate that the work of this PHMSA group can be incorporated as new code language and/or referenced as helpful guidance.

FAQs: Class Location Special Permits

These Frequently Asked Questions (FAQs) are intended to clarify, explain, and promote better understanding of issues concerning special permits for waivers to class location regulations. These FAQs are not substantive rules and do not create rights, assign duties, or impose new obligations not...

Underground Natural Gas Storage Facility (UNGSF): FAQs

Frequently asked questions clarifying, explaining, and promoting better understanding of issues concerning integrity assessment of Underground Natural Gas Storage Facility (UNGSF).

FAQs: ECDA for Cased Pipes

These Frequently Asked Questions (FAQs) are intended to clarify, explain, and promote better understanding of issues concerning integrity assessment of cased pipe using ECDA. These FAQs are not substantive rules and do not create rights, assign duties, or impose new obligations not outlined in...

Covered Task List: MAOP

This list applies to the construction of gas pipelines that will operate pursuant to the Alternative Maximum Allowable Operating Pressure (Alt MAOP) regulations in § 192.620. If a construction task on this list is performed after December 22, 2008, the task must be treated as a "covered task",...

FAQs: Alternative MAOP

Alternative MAOP FAQs

These Frequently Asked Questions (FAQs) are intended to clarify, explain, and promote better understanding of issues concerning implementation of the Alternative MAOP Rule. These FAQs are not substantive rules and do not create rights, assign duties, or impose new...

Pipeline Safety: Stress Corrosion Cracking (SCC) Threat to Gas and Hazardous Liquid Pipelines

PHMSA is issuing this to owners and operators of gas and hazardous liquid pipelines to consider the threat from stress corrosion cracking (SCC) when developing and implementing Integrity Management Plans.

Pipeline Safety: Alternative Mitigation Measures for Required Repairs Delayed by a Need to Obtain Permits

Congress directed the Research and Special Programs Administration's (RSPA) Office of Pipeline Safety (OPS) to revise its pipeline safety regulations, if necessary, to allow operators to take alternative mitigation measures while they seek governmental permits required for repairs. As RSPA/OPS...

Gas Transmission Integrity Management FAQs

This site provides information about PHMSA's implementation of Control Room Management oversight, and links to other educational information on human factors and human operational performance.

High Volume Excess Flow Valves

High Volume Excess Flow Valves

Welcome. This site is administered by the Pipeline and Hazardous Materials Safety Administration (PHMSA).

Excess Flow Valves (EFVs) are safety devices installed on natural gas distribution pipelines to reduce the risk of accidents. EFVs are...