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WRC 297 Limitations

WRC 297 Limitations

WRC 297 Limitations

(OP)
I am working on a nozzle load calculation on a small pressure vessel.  The nozzles are 2" pipe.  As I look at paragraph 3.2 in WRC 297, there is a statement that for thin-shell theory to be valid, d/t must be greater than 20.  That seems to prevent this bulletin from being used for small nozzles.  What other methods are applicable for calculating stress in nozzle/shell joints for small nozzles?

RE: WRC 297 Limitations

You could do an FEA analysis if you have the mathematical ability or software, FEA is way more accurate than WRC anyway.  

RE: WRC 297 Limitations

That's the reason that you don't apply the WRC 107 to nozzle less tha 3" NB.
Cheers,
gr2vessels

RE: WRC 297 Limitations

Use FEA.But i wonder why do you need to perform nozzle load calculation for a 2" nozzle? Such small lines are usually not "stress critical".
 

RE: WRC 297 Limitations

(OP)
Thanks for the responses.  Our customer apparently has an aversion to pipe supports.  The customer specification has a generic nozzle load table that has significant nozzle loads for nozzle sizes down to 1".

RE: WRC 297 Limitations

2busyatwork (Mechanical)

Technical Note:

Please review WRC 497 Limitations

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