What is the maximum allowable working pressure (MAWP) for low pressure steam boilers?

The maximum allowable working pressure (MAWP) for low pressure steam boilers is defined by regulatory standards, which generally stipulate that the MAWP should not exceed 15 psig. This threshold is established to ensure the safe operation of such boilers, as pressures higher than this can lead to increased risks of equipment failures and safety hazards.

At 15 psig, the operation remains within the low pressure category, which is specifically designed for applications that do not require high steam pressures, thus providing adequate safety margins for both equipment and personnel. This understanding is essential in the context of boiler operations and maintenance, as adhering to the MAWP guidelines helps ensure compliance with safety regulations and proper functioning of the boiler systems.

Other choices indicate either pressures that exceed the definition of low pressure steam systems or suggest there is no limit, which does not align with established safety protocols and industry standards. Hence, 15 psig is recognized as the correct limit for low pressure steam boilers.