Minimum size of ASME code vessel

[Adrian2]

Dear Folks;

Is there a minimum size or volume below which vessels do not have to be ASME code certified.

This question arises from dust collector air headers. Which, I have been told do not need pressure vessel certification below a certain volume.

Best Regards

Adrian Dunevein

http://www.aaadrafting.com

 

[metengr]

Yes, this is described in the Introduction of ASME Section VIII, Div 1 for unfired pressure vessels.

...i) vessels having an inside diameter, width, height or cross section diagonal not exceeding 6" with no limitation on length

 

[TBP]

It is possible that the headers could fall under pressure piping code requirements.

 

[1969grad]

Sometimes we classify piping assemblies as "fabricated piping assemblies" and design them in accordance with the piping code instead of the ASME BPV Code.

For example, pipeline pig launchers/receivers and compressor pulsation bottles can be fabricated piping assemblies.

 

[ApC2Kp]

Adrian2,
The ASME B31.3 Process Piping Code also includes provision for pressure less than 15 psig and temperature less than 366 deg F for non-toxic non-flammable fluid services being excluded from the scope of the B31.3 Code. I think the ASME vessel Codes have similar 15 psig threshold for application. Your dust collection air headers may be outside of ASME scope.

 

[Adrian2]

ApC2Kp,

The air pressure in this header is 80 psig

Also 1969grad,

the fabricated piping assemblies idea sounds good

thanks also metengr I will check out the PV code section you mentioned.

Best Regards

Adrian