What does the stamp (S) on a boiler signify?

The stamp (S) on a boiler signifies that it is a "Power Boiler." In the context of boiler classifications, power boilers are defined and regulated by specific codes that govern their design, construction, and operation. The "S" stamp indicates that the boiler is built in accordance with the ASME (American Society of Mechanical Engineers) Boiler and Pressure Vessel Code, specifically for high-pressure applications.

This designation is crucial in ensuring that the boiler meets safety and performance standards required for operation in various industries where steam generation is essential. Power boilers are typically designed to operate at higher pressures and temperatures compared to other types like heating boilers or low-pressure boilers, and the stamp signifies compliance with the rigorous standards necessary for such applications.

Understanding this distinction is important for professionals working with boilers, as it impacts safety, licensing, and operational procedures. Proper identification of the type of boiler is essential to ensure adherence to regulations and to prevent catastrophic failures.