According to ASME standards, what is the pressure threshold for a steam boiler to be classified as a Power Boiler?

The classification of a steam boiler as a Power Boiler according to ASME standards is defined by the pressure threshold of 15 psig, which is equivalent to 100 kPa. This standard delineates the types of boilers based on their operational pressure, indicating that any steam boiler operating at or above this pressure is considered a Power Boiler.

This classification is significant because Power Boilers are subject to a particular set of regulations and safety requirements that differ from those for lower-pressure systems, primarily due to the higher potential risks associated with the operation of high-pressure systems. Understanding this standard is crucial for safety, operation, and compliance in power engineering practices.

The other pressures presented in the choices do not match the established threshold for Power Boilers according to ASME criteria, thus confirming why the specified pressure of 15 psig is the correct identification for Power Boiler classification.