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NACE list of materials forbolts and nuts at valve

NACE list of materials forbolts and nuts at valve

NACE list of materials forbolts and nuts at valve


does there exist a list of materials which are appropriate for usage at bolts and nuts at valves according to NACE standard?
If yes where can I get it?

I would liketo thank you for the send answer!


RE: NACE list of materials forbolts and nuts at valve

Not really a listing. For low alloy steel, Part 2 has Table 4, that is not even discussed in the text of the standard, for bolting that will be exposed to pressurised H2S containing fluid. It is simply A193 B7M/A320 L7M/A194 2HM or 7M. The section for bolting is poorly discussed, essentially leaving the user to ensure that if other materials are used then they are to have heat treatment, chemical composition, and hardness compliant with the rest of the standard if they will be exposed to pressurised H2S containing fluid. For corrosion resistant alloy bolting, there is no discussion of possible fastener standards.

Steve Jones
Corrosion Management Consultant


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