Valve cold operating pressure
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In GB/T 24925-2019 \"Low-temperature valves – Technical requirements\", the cold operating pressure is defined as follows: The cold operating pressure (CWP) is the maximum allowable operating pressure of the valve at medium temperatures ranging from -20°C to 38°C. In low-temperature operating conditions, where the working temperature reaches -162°C and below, what is the basis for the defined range of -20°C to 38°C?
The temperature range of -20°C to 38°C specified in GBMT 24925-2019 \"Technical Requirements for Low-Temperature Valves\" is based on the operational requirements and environmental conditions in environments ranging from room temperature to high temperatures, in order to ensure that the valves can operate safely and reliably under normal conditions. Under low-temperature conditions, since the temperature of the medium is extremely low, this definition does not apply; design and selection must be carried out based on specific circumstances. -