What is the normal temperature in degrees?

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There are three concepts related to room temperature: 20°C – In the context of the mechanical properties of metals, the mechanical properties of a metal at 20°C are taken as its properties at room temperature. For metals, 20°C is commonly regarded as the room temperature. Accordingly, the temperature during equipment installation is set at 20°C, and 20°C is commonly used as the normal temperature in the thermal analysis of containers and pipelines. 25℃ —— In physical chemistry, the properties of various chemical substances at 25℃ (298K) are taken as their properties at room temperature; for the operating temperature of the medium contained in a container, 25℃ can be used as the room temperature. 50℃ —— This is the highest temperature that can be reached in China’s natural environment, and it is taken as the normal temperature for the design of pressure vessels; in such designs, \"50℃\" is commonly used as the reference value. In pressure vessels, normal temperature refers to 20°C, while the design temperature for vessels at normal temperature is 50°C.