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301 Stainless for use in ASME Pressure Vessel

301 Stainless for use in ASME Pressure Vessel

301 Stainless for use in ASME Pressure Vessel

(OP)
Hoping one of you could help me out. I want to make a pressure vessel component out of stainless, and need to make sure it is ASME compliant. I was looking at the list of stainless steels covered by an SA or A spec in the ASME BPVC Section VIII, and it seems to exclude 301 (UNS#S301000, EN# X10CrNi18-8) (and 302 and 303 S.S for that matter). I mostly see specs for 304 and 316, which makes sense because they are more abundant.

My questions are:
1) Is there a spec for 301 that I can use? Am I overlooking it.
2) If there is no spec, then I seem to recall an ASME approval process for non-standard materials. Could you briefly describe the approval process?? Additionally, if someone has gone through the process, can you give me a sense of whether it would be worth the trouble?? I will probably give in, and just use an established spec, rather than go through a tedious approval process.

Any recommendations or alternative approaches are welcome.

Thanks everyone!

RE: 301 Stainless for use in ASME Pressure Vessel

If you have a copy of ASME B&PV Code, Section II, Part D and the material is non-listed or there is no Code Case for the material, you are correct, the material is not acceptable for use as pressure-retaining material.

If you want to develop a submittal for a Code Case for use of this material, you need to follow the requirements for the respective Code book section for submittal of Code Cases. You can locate this information under a Mandatory Appendix titled SUBMITTAL OF TECHNICAL INQUIRIES TO THE BOILER AND PRESSURE VESSEL COMMITTEE — MANDATORY

All of the information is there for what you need to do for a Code Case.

Is it worth it? It all depends on your business needs because it will require time and data submittals to the committee. How do I know this - I sit on an ASME B&PV Code standards committee and see these all the time.

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