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like 17-4 H1150 for example? anyone?

Thanks for the quick reply. Are there any other free machining stainless steels that would be acceptable? Is there any documentation that substantiates not being able to use it? (I know its not listed as an acceptable material in ASME, but there are a ton of materials that aren't listed but...

Does anyone have any experience/knowledge about using a free machining stainless steel such as 303SE (aka UNS 30323) for a pressure fitting (i.e. a check valve). It's for pressurized liquid, up to 6000 psi. The check valve I'm looking at is currently made from 304 SS and production wants to...

Thanks Seagull. I saw the B18.2 reference, but that's just a general fastener reference (dimensions, tolerances, materials etc) and has nothing on connections. I phoned ASME and they said B16.8 is obsolete. They're phoning me back to let me know why its obsolete and what superceded it...

Are washers are allowed between the nut and flange of a bolted, flanged connection? I can't find anything in ASME B16.5 except one clause (6.6) that says the bolt bearing surfaces must be parallel within 1 deg. And I searched the forum without success. Also, if washers are allowed, what...