I’m seeking advice from experts: what material should be used for pipes carrying ammonia at a low temperature of -30°C?

2022-05-27View Original

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The original design specifications for cold storage specified the use of grade 10 or 20 steel, with a focus on low temperature and low stress levels; this requirement is no longer included in the new standards. Is the use of grade 20 steel considered to have average safety levels? Can 16MnDG be used? Are there any other safer materials?

Reply #22022-05-27

The requirements of the new standard are specified in Pressure Piping – Industrial Piping 20801

Reply #32022-05-27

Q345E (GB/T 6479) can be used

Reply #42022-05-28

Low-temperature steel pipe fittings of the 16-manganese series should be used.

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I’m seeking advice from experts: what material should be used for pipes carrying ammonia at a low temperature of -30°C?

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