A hot water boiler is considered high temperature when its operating temperature exceeds:

A hot water boiler is classified as high temperature when its operating temperature exceeds 120°C. This distinction is important in the context of power engineering and boiler operation because it indicates different safety standards, operational procedures, and design considerations that must be followed for high-temperature versus lower-temperature systems.

At temperatures over 120°C, various thermodynamic principles come into play, affecting the efficiency and safety of the boiler. For instance, the risk of steam formation, thermal expansion issues, and the materials of construction become more critical at these higher temperatures.

Understanding the specific temperature threshold for high-temperature boilers allows operators to ensure that proper safety mechanisms, such as relief valves and proper material selection, are implemented to handle the unique challenges posed by high-temperature operation.