High pressure piping 2

[Elsh]

I would like to understand the limits for high pressure piping in detail as per ASME B31.3. Which pressure values for piping system is considered high pressure? WIll appreciate the comments/explanation of experts on this.

 

[LittleInch]

If you do a search on this forum you find things like this

https://www.eng-tips.com/viewthread.cfm?qid=315615

Kind of makes sense - basically if it's within an ASME class 2500 flange range for pressure and temperature you're ok with normal pressure, above that and y you need to start using things like API 6A flanges or special flanges.

There is no guidance I can find in the code itself, but there might be a code case.

Anyway it is an owner designation, unless they don't have a clue...

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

 

[Elsh]

Thanks very much LittleInch.

I know that in FK300 the code states as follows: "Although High Pressure Fluid Service is often considered to be service exceeding that allowed by the ASME B16.5, Class 2500 pressure–temperature rating for a particular material group, there are no pressure limitations for the application of these rules. The decision by an owner to specify High Pressure Fluid Service is based on the economic, technical, and other issues pertaining to the piping".

However I just wanted to clarify if that 2500 range is a rule or not.

In any case thanks very much for your response.

 

[XL83NL]

It’s not a rule. Like LI mentioned, High Pressure Piping is a fluid service and needs designation as such by the owner.
Whenever you need to do Chap. IX piping, make sure your quoting dept/sales guys have factored in a few extra bucks for all the additional work that coming to your desk.

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

 

[EngrPaper]

The above answers are correct, it's an owner's discretion designation. In one place I've worked, we classified anything over 6000 psig outside of normal fluid service mainly because the AHJ regulations had different requirements above that.

 

[Elsh]

Many thanks guys for your valuable inputs.