What pipeline operating stress levels are permissible when the alternative MAOP Rule is applied?
Pipelines in Class 1 locations may operate at stress levels up to 80 percent of SMYS when the conditions of the alternative MAOP Rule are met. The rule adds a new section, 49 CFR 192.620, to specify what actions an operator must take in order to elect an alternative MAOP based on higher operating stress levels. The rule applies to both new and existing pipelines. Pipelines in class 2 and 3 areas meeting the requirements in 192.620 can also raise their stress levels to 67% SMYS and 56% SMYS. The stress level in a Class 4 location may not be raised higher than 40% SMYS.
Related Questions
- Are certain types of pipelines or pipeline conditions prohibited from using the alternative MAOP Rule to operate at higher operating stress levels?
- What must a pipeline operator do if they want to operate at higher pipeline stress levels under the alternative MAOP Rule?
- What pipeline operating stress levels are permissible when the alternative MAOP Rule is applied?
