Major Differences Between ASME B31.3 and B31.1

[BigOilGuy]

I know this is a loaded question but from a high level perspective what are the key differences between ASME B31.1 and B31.3. There a good article on this?

Test pressures appear to the same, so the big differences are in NDE and safety factors?

 

[KevinNZ]

https://whatispiping.com/difference-asme-b31-3-and-b31-1/

 

[LittleInch]

B31.1 is designed for steam, water, air and gas in power plants.

B31.3 is designed to cater for virtually anything.

Most oil and gas design companies only use B31.3. Only design houses used to designing thermal power plants use B 31.1. IME.



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Also: If you get a response it's polite to respond to it.

 

[XL83NL]

From ASME's C&S Connect website, data open to the public, there's Selecting Applicable B31 Piping Code Sections. It details some of the main differences between both.

Huub
- You never get what you expect, you only get what you inspect.

 

[LittleInch]

Interestingly they don't quote NFPA 59A which is used for LNG storage and transport, though it does defer to B31.3 a lot.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.