Using stiffeness in the nozzle of the vessel

Question

Using stiffeness in the nozzle of the vessel

Babak3 (Mechanical)

(OP)

9 Sep 23 09:07

Hello,
I have a Caesar ii stress file for checking.
In the file in the intersection between nozzle and vessel stiffness values have been written.
I have a question about where these values come from.
No nozzle flex check box have been marked.
Can anyone explain this case, please?
Thank you in advance

richay (Mechanical) · Answer 1 · 2023-10-05 02:34:34

This sounds like someone performed a "nozzle stiffness" evaluation outside of CAESAR II, then input the stiffnesses. The origin of these values should have been provide - check the "title page". If there are no notes, I'd suggest going back to whomever gave you the model and ask.

Richard Ay
Hexagon PPM (CAS), Consultant

StressGuy (Mechanical) · Answer 2 · 2023-10-10 21:23:01

Agreed with Richard.

Whoever put the analysis together should be able to give you a source (such as a Nozzle Pro run) for the flexibilities that they've entered into the calc file.

If you're the responsible checking engineer, then you should be the one directing what tools are being used on your project.

Edward L. Klein
Pipe Stress Engineer
Houston, Texas

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Using stiffeness in the nozzle of the vessel