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Steels and hydrogen service

Steels and hydrogen service

Steels and hydrogen service

(OP)
For a revamp of a plant, I need to select some pipe/fitting materials. Because some of the gases have a high hydrogen partial pressure, I've used the Nelson curves as a basis for material selection. Has anyone additional advice or guidelines for hydrogen service besides Nelson and API941?

RE: Steels and hydrogen service

see Thread124-92325 for H2 piping recommendations, espescially the NASA standards

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