What operating stress levels were pipelines limited to prior to promulgation of the higher alternate MAOP Rule?
Operating stress levels were tied to the pipeline Class location which is a function of the population density near the pipeline. In sparsely populated Class 1 locations, the design factor specified in 49 CFR 192.105 restricts the stress level at which a pipeline can be operated to 72% of the specified minimum yield strength (SMYS) of the steel. The operating pressures in more populated Class 2, Class 3, and Class 4 locations are limited to 60, 50, and 40 percent of SMYS, respectively.
Related Questions
- What must a pipeline operator do if they want to operate at higher pipeline stress levels under the alternative MAOP Rule?
- What operating stress levels were pipelines limited to prior to promulgation of the higher alternate MAOP Rule?
- What pipeline operating stress levels are permissible when the alternative MAOP Rule is applied?
