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LT Judd

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- TL;DR Summary
- ASME BPVC VIII uses a slightly different formula to Australian Standard 1210 for calculating the wall thickness of cylindrical shells in pressure vessels. I am trying to figure out why.

The ASME BPVC formula is t=PR/(SE-0.6P) where P = pressure , R = inside radius, S = allowed material design stress and E = joint efficiency factor. the AS1210 formula ,(equivalent nomenclature) is t=PR/(SE-P). This makes 1210 more conservative when using the inside radius . I suspect the pure theoretical formula would use R as the mid wall radius and the formula would be t=PR/SE. Does anyone have any idea why the difference between ASME and AS and what's with the 0.6 factor? Is that some empirical thing that ASME has patented? Does any one know what the EN or DIN formula is? I asked Chatbot GPT and it gave me a PC non answer , so this is your chance to prove humans are still smarter than computers.