Gas Transmission Integrity Management (GT IM)

GT IM Menu


Home Page Photo This site is administered by the Pipeline and Hazardous Materials Safety Administration (PHMSA). It provides information regarding the Gas Transmission Integrity Management Rule (68 FR 69778), commonly referred to as the "Gas IM Rule", or alternatively, the "GT IM Rule."

The GT IM Rule resulted in regulations (49 CFR Part 192, Subpart O) which specify how pipeline operators must identify, prioritize, assess, evaluate, repair and validate the integrity of gas transmission pipelines that could, in the event of a leak or failure, affect High Consequence Areas (HCAs) within the United States. These HCAs include certain populated and occupied areas. Operators were given until December 17, 2004 to write and implement their IM programs.

For an overview of the progress being made under the gas transmission pipeline integrity management (GT IM) regulations, please see the Performance Measures page. There you will find graphs and charts which depict progress and other aspects of operator implementation of the GT IM regulations. You will also find a link to the data provided by pipeline operators in accordance with these regulations.

Other GT IM menu links on the left provide additional information, including an operator IM process flowchart and a fact sheet that summarizes key requirements of the GT IM regulations; details of the GT IM regulations; a glossary of related terminology; FAQs; and, other information useful in more fully understanding these regulations.