PHMSA Pipeline Technical Resources
This site is administered by the Pipeline and Hazardous Materials Safety Administration (PHMSA). It provides technical and regulatory information concerning issues and recent rulemaking for selected pipeline safety topics. This site is oriented primarily toward operators to provide information useful for complying with PHMSA regulations. However, all stakeholders might find this material informative. The below links provide information for the latest rulemaking, advisory bulletin, and instructions for submitting required notifications. This site is updated as needed to reflect new developments and information pertinent to these issues.
Alternative MAOP Alternative MAOP web site Cased Crossings & Guided Wave Ultrasonics (GWUT) Cased Crossings & Guided Wave Ultrasonics web site Class Location Special Permits Class Location Special Permits web site Control Room Management (CRM) Control Room Management web site Gas Distribution Integrity Management Program (DIMP) Gas Distribution Integrity Management Program web site Gas Transmission Integrity Management (GT IM) Gas Transmission Integrity Management web site Hazardous Liquid Integrity Management (HL IM) Hazardous Liquid Integrity Management web site Risk Modeling Work Group (RMWG) Risk Modeling Work Group	High Volume Excess Flow Valves (EFV) High Volume Excess Flow Valve web site Low Strength Pipe Low Strength Pipe web site Operator Qualification (OQ) Operator Qualification web site Pipeline Construction Pipeline Construction web site Research & Development (R&D) Research & Development web site LNG Facility Siting LNG Facility Siting Application Public Meetings Public Meeting web site Underground Natural Gas Storage Underground Natural Gas Storage web site