What type of materials should be used for equipment and pipes with a refrigerant at -45°C?
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What type of materials should be used for equipment and pipes with a refrigerant at -45°C?
Stainless steel, copper, aluminum alloys, and so on – as long as the refrigerant does not cause a chemical reaction with the material being used and the metal does not crack from freezing, any of these can be used. I don’t know what you’re going to do? Please specify.
Q345D，Q345E
If only temperature is a consideration, low-temperature steel such as 09MnNiDR will suffice; if corrosion, cleanliness, and other factors are also taken into account, austenitic stainless steel can be used.
I’m just a pipe fitting; the general requirement is 16MnD
Under normal operating conditions, pipe fittings are mostly made of 16Mn material; austenitic stainless steel is used when corrosion is a concern.
—At 45°C, neither 16MnDR steel plates nor Q345E steel pipes work
Austenitic stainless steel is recommended. Unless the design pressure of the equipment and pipelines is very high, it is not recommended to use materials suitable for low temperatures.