What does the "Pressure Vessels" section of the B-51 code identify regarding pressure vessels?

The "Pressure Vessels" section of the B-51 code identifies hydropneumatic tanks as standard equipment that meets specific regulatory standards for pressure vessels. Hydropneumatic tanks serve an essential role in maintaining system pressure and providing a buffer for water systems, particularly in applications that require water pressure regulation.

Understanding hydropneumatic tanks within the context of the B-51 code is key for ensuring compliance with safety requirements, as these vessels must withstand certain pressures and have specific design features to safely contain fluids under pressure. The code outlines the necessary materials, construction methodologies, and testing procedures vital for ensuring the integrity and performance of such tanks in service.

While the other choices represent various types of pressure vessels commonly used in industrial applications, the key focus of the B-51 code pertains specifically to hydropneumatic tanks, emphasizing their standards and compliance needs for safe operation.