Pressure Thrust in PV Elite and FEA 3

[Mohit_singh]

Hi All
I am currently designing a vessel in which I have to go for FEA of a nozzle as its failing using WRC 107. Now for avoiding Rigid body motion we apply a pressure thrust in Nozzle flange while doing FEA. But when when we design the same nozzle using PV Elite , We are not including Pressure Thrust in design Calculation of the same. I am confused that shall I include it in FEA or not. In both cases I have Piping Loads Included.

 

[CuMo]

If the design specification doesn't specify whether the nozzle (piping) loads include thrust loads I would include them
just to stay on the safe side. If the nozzle happens to fail - I would go to my client and let them know.
If they are happy for these to be excluded - then it is their responsibility.
All other theories are just assumptions you might not be supposed to make if you don't have the whole picture in front of you.
This would be my safe approach.

 

[marty007]

The only time I can remember seeing a support like that shown in the example was in a failure analysis. The piping designers had anchored a pipe spool about 20ft from a nozzle on a very thin-walled heat exchanger operating at elevated temperatures. The thermal growth in the piping had completely bent the shell and all of the tubes of a fixed tubesheet heat exchanger.

Not a good support arrangement...