USA Banner

Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

Archived Rulemaking: Confirmation or Revision of Maximum Allowable Operating Pressure; Alternative Method

54-fr-24173.pdf (320.1 KB)

Under this final rule, the maximum allowable operating pressure (MAOP) of a pipeline may be confirmed or revised as a specified percentage of its past test pressure, provided the test was conducted for at least 8 hours. Previously, a pipeline must have been tested to at least 90 percent of the specified minimum yield strength (SMYS) of the pipe to qualify for this method of confirming or revising MAOP This rule change may reduce the need to retest pipelines for which past test pressures provide an adequate safety basis for current operating pressures.

DOT is committed to ensuring that information is available in appropriate alternative formats to meet the requirements of persons who have a disability. If you require an alternative version of files provided on this page, please contact
Last updated: Thursday, August 16, 2018