Where can the maximum allowable working pressure of an ASME tank be found?

The maximum allowable working pressure (MAWP) of an ASME (American Society of Mechanical Engineers) tank is primarily found on the data plate. The data plate is a permanent label affixed to the tank that provides essential information regarding the equipment, such as its design specifications, materials of construction, and, importantly, the maximum allowable working pressure. This ensures that users have quick and easy access to the critical operational limits of the tank to ensure safe usage.

The safety manuals, while they may provide general guidance and safety information, do not contain the specific operational details outlined on the data plate. The pressure gauge indicates the current pressure within the tank but does not establish the maximum allowable pressure. The inspection report could provide a record of safety checks and compliance, but it does not typically display the MAWP that is established during the tank's design and certified by ASME standards. Thus, the data plate is the correct source for verifying the maximum allowable working pressure of an ASME tank.