What materials should be used for nitrogen pipelines and liquid nitrogen pipelines?
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What materials are generally used for nitrogen pipelines and liquid nitrogen pipelines? Is the material of the nitrogen pipeline related to the purity of nitrogen?
For ordinary nitrogen, carbon steel is sufficient; stainless steel is used for liquid nitrogen pipelines to prevent vaporization at low temperatures.
Could you be more specific? What material should be used? For nitrogen, will grade 20 steel work? For stainless steel, should I use 304L?
Yes, no problem, 20# and 304
For nitrogen at room temperature, a carbon steel pipe is sufficient. . . Stainless steel can also be used, as well as aluminum tubes or liquid nitrogen tubes; austenitic stainless steel can be chosen, with 304 being the most basic option. Aluminum alloy tubes can also be chosen
For liquid nitrogen pipelines, S30408 as specified in GB/T14976-2012 is typically used; for nitrogen pipelines at normal temperatures, grade 20 steel as specified in 8163 is sufficient!
For liquid nitrogen tubes, will 304 become brittle at low temperatures?
For liquid nitrogen tubes, will 304 become brittle at low temperatures?
Our nitrogen is all made from 304 stainless steel
The temperature of liquid nitrogen is around -160°, and under such conditions, 304 stainless steel generally does not suffer from cold brittleness.
The minimum operating temperature for 304 is -253. . . When using temperatures below -196, a -196 impact test is required.