What is the classification of a boiler operating under pressures exceeding 160 psig?

A boiler that operates under pressures exceeding 160 psig is classified as a High Pressure/High Temperature Boiler. This classification is vital because it indicates specific design, construction, and operational standards necessary for safety and efficiency at such elevated pressures.

High pressure boilers are subject to stringent regulations and require appropriate materials and monitoring systems to handle the physical demands of high pressure and temperature. These boilers are typically used in applications that require significant energy output, such as in industrial processes or large-scale heating systems.

The other classifications do not meet the criteria for operating pressures above 160 psig. Heating boilers generally operate at lower pressures, while hot water supply and storage tanks also function within specific lower pressure limits to maintain safety and efficiency. Hence, the distinction is important not only for regulatory compliance but also for operational safety in a high-pressure environment.