MAWP stands for which term?

MAWP stands for which term?

• A. Maximum Allowable Pressure
• B. Maximum Allowable Working Pressure
• C. Mechanical Allowable Working Pressure
• D. Mean Allowable Working Pressure

Answer: (B)

MAWP is the maximum pressure at which a vessel or piping system is permitted to operate at a given temperature, as defined by the ASME Code. It represents the operating limit that ensures the material, geometry, and thickness will stay within allowable stress limits under design conditions. Because it governs safe operation and the setting of relief devices, it must not be exceeded in service. The term explicitly includes “Working,” distinguishing it from other pressure-related terms that might refer to burst or design limits without specifying actual operating conditions. The other phrasings omit or alter this meaning, so they aren’t the standard code term. Therefore, the correct interpretation is Maximum Allowable Working Pressure.

MAWP is the maximum pressure at which a vessel or piping system is permitted to operate at a given temperature, as defined by the ASME Code. It represents the operating limit that ensures the material, geometry, and thickness will stay within allowable stress limits under design conditions. Because it governs safe operation and the setting of relief devices, it must not be exceeded in service.

The term explicitly includes “Working,” distinguishing it from other pressure-related terms that might refer to burst or design limits without specifying actual operating conditions. The other phrasings omit or alter this meaning, so they aren’t the standard code term. Therefore, the correct interpretation is Maximum Allowable Working Pressure.