Which marking is applied to a power boiler as per BPVC standards?

The marking applied to a power boiler as per the ASME Boiler and Pressure Vessel Code (BPVC) is 'A.' This marking indicates that the boiler is part of the 'Section I' standards, which specifically govern power boilers. These standards ensure that the design, construction, and inspection of the boiler meet rigorous safety protocols and performance requirements.

The 'A' marking signifies compliance with the minimum code requirements, reflecting the boiler's capacity to operate safely at high pressures and temperatures. It also indicates that the boiler has passed through the necessary testing and inspections, which is critical for ensuring reliability and safety in various industrial applications.

Other markings, such as 'S,' 'E,' or 'M,' relate to different categories of pressure vessels or specific applications within the code. For example, 'S' is used for ‘Section VIII’ vessels, which covers pressure vessels rather than specifically power boilers. Each marking serves a different purpose in identifying the criteria under which the equipment has been designed and manufactured, making it essential for engineers and inspectors to understand their significance.