What pipelines qualify for operation under a higher alternative MAOP?
49 CFR 192.620 (b) describes which segments of new or existing pipeline are qualified for operation at the higher alternative MAOP. The higher alternative MAOP is allowed only in Class 1, 2, and 3 locations. Only steel pipelines meeting the rigorous design and construction requirements of 49 CFR 192.112 and 192.328 and monitored by supervisory data control and acquisition systems qualify. Mechanical couplings in lieu of welding are not allowed and 95% of girth welds must have been examined for existing pipelines to operate at alternative MAOP. Class 4 locations are not allowed to operate using a higher alternative MAOP.
49 CFR 192.620 (b) describes which segments of new or existing pipeline are qualified for operation at the higher alternative MAOP. The higher alternative MAOP is allowed only in Class 1, 2, and 3 locations. Only steel pipelines meeting the rigorous design and construction requirements of 49 CFR 192.112 and 192.328 and monitored by supervisory data control and acquisition systems qualify. Mechanical couplings in lieu of welding are not allowed and 95% of girth welds must have been examined for existing pipelines to operate at alternative MAOP. Pipelines in Class 4 locations may not be allowed to operate using a higher alternative MAOP. Pipelines in Class 4 locations may be operated up to a design factor of 0.40 in accordance with 49 CFR 192.111.
Related Questions
- Are certain types of pipelines or pipeline conditions prohibited from using the alternative MAOP Rule to operate at higher operating stress levels?
- Can existing pipelines that have experienced a failure indicative of materials concerns qualify for the use of a higher alternative MAOP?
- What pipelines qualify for operation under a higher alternative MAOP?
