Maximum Allowable Working Pressure

The maximum allowable working pressure (MAWP) is required to be displayed on a pressure vessel’s nameplate, and is defined in the Code as, “the maximum pressure permissible at the top of the vessel in its normal operating position at the (design) temperature.” The MAWP is not the same as the design pressure (Pd), which provides the basis for the design of the vessel. The MAWP is determined from the design of the vessel as described below, and is not used for the design.

Categories: Process Design | Leave a comment