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Does anyone have any experience using an inflatable seal (i.e., a Pawling or similar inflatable gasket) as a pressure vessel closure? This would be the only component sealing the main vessel closure/cover and I'm concerned that it will not meet ASME B&PV UG-35.2 criteria. The vessel is designed...

Really...nothing?! No one is fabricating stainless steel vessels for export to China?

We are a fabricator of stainless steel pressure vessels and are going through the process of getting our license to the subject specification for export to China (by our customer). The material requirements jump from carbon and low alloy steel material to aluminum and non-ferrous materials...

Yea, UG-20(b) with the statements that "the MDMT marked on the nameplate shall correspond to a coincident pressure equal to the MAWP" and "when there are multiple MAWP's, the largest value shall be used to establish the MDMT marked on the nameplate" makes me think that I'm barking up the wrong...

I'm well aware of the exemption for the base material, BUT UHA-51(f) requires impact testing of the welding consumables and UHA-51(h) might potentially require production impact tests. Ignore the "when and where" impact testing is required and for what materials, my question is more are these...

I have an ASME Div. 1 Sec. VIII SA240-316L SST pressure vessel that has internal coils at -238F. The vessel itself is normally operated at atmospheric pressure or under vacuum at -103F, but is also periodically steam sterilized at 30 psig and 275F. I usually rate these at 30 psig/FV at 275F with...

Thanks for the help and recommendations! I'll give them a try and post the results in case someone else has this situation come up.

All good ideas. I have to be careful as this is not only a pressure vessel under ASME code & PED certification but it is a vessel for pharmaceuticals and so has other material constraints besides the low ferrite. We tried MIDALLOY ER316L LF (Low Ferrite) CRYO BARE WIRE, I'll look into the...

I didn't think so but it was worth asking the question. We are going to do some samples with the low ferrite weld wire as a cover pass and potentially a welding gas with some nitrogen content (we read some articles that this will help to inhibit the formation of ferrite) to see if we can better...

Will passivation or pickling remove ferrite from the surface layer of 316L stainless steel? I'm not talking about free iron contamination, but the actual ferrite as part of the grain structure of the metal. I have a customer that I'm building a vessel for and the product is sensitive to ferrite...

This may sound obvious, but UG-47 and UW-19 only apply to pressure between the two plates being braced and stayed, correct? One of my collegues is trying to apply these rules in designing a jacketed rectangular vessel with flat walls as if the pressure (P) from UG-47 is inside the rectangular...

Depending on the size of bolt you need, you can even buy these from the McMaster-Carr catalog. A 3/4"-10UNC x 2" long bolt is only $4.55.

Does anyone know whether a sanitary ferrule to ASME BPE-2002, DT-2 is acceptable for use on a pressure vessel to ASME B&PV code section VIII? Table DT-2 in BPE-2002 gives limited pressure/temperature ratings for the fittings but does not specifically cite section VIII acceptability. Also, ASME...