Hydrogen pipeline
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I would like to ask if there are any requirements regarding the hydrogen filling tubes used by fellow sailors; for example, are carbon steel, 304 steel, and 316 steel acceptable? Are there any relevant standards?
Refer to GB 50177-2005 Code for Design of Hydrogen Stations
20# steel is no problem; the requirement lies in the standards for pipes. For example, GC1 pipes must be made of 9948 seamless steel tubes. Additionally, TIG welding should be used as a base welding method to prevent iron filings and slag from entering the pipes. Moreover, at pressures of ≥2.5 Mpa, stainless steel valves must be used (for the valve body, valve stem, and sealing surfaces)