Why are mill test reports required for the alternative MAOP rule?
The alternate MAOP rule allows operators to establish MAOPs higher than previously allowed by 49 CFR Part 192. Operators must have adequate documentation of pipe mechanical and chemical properties to demonstrate that the pipe material is suitable for operation at the higher stress levels allowed by the alternate MAOP Rule. Such documentation should include mill test reports documenting actual yield strength, tensile strength, chemical properties, carbon equivalents and toughness of the steel used in the pipe, see 49 CFR 192.112.
Related Questions
- Are certain types of pipelines or pipeline conditions prohibited from using the alternative MAOP Rule to operate at higher operating stress levels?
- The alternative MAOP Rule requires the use of non-shielding coating. What coatings does PHMSA consider to be non-shielding?
- Why are mill test reports required for the Alternate MAOP rule?
