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#42541 - 04/20/11 10:40 AM Pump Analysis Education
gBeals23 Offline
Member

Registered: 04/30/07
Posts: 17
Loc: Atlanta
I'm working with a young piping engineer that I'm trying to educate a little about pipe stress analysis. I'm trying to begin explanation of pumped system analysis, i.e. why we do it, and the step by step methods to reduce stresses and approve nozzle loads.

He's already learned from his team members many dangerous 'facts', such as if a pump is pumping near ambient water, then we don't have to worry about nozzle loads being over stated allowable. This is of course because "it's proper pump deisgn to run a straight pipe (with ecentric reducer) from tank to pump, and for a short run where there is negligible thermal growth, it is ridiculous to install an expansion joint"

I'm looking to see if anyone has an actual step-by-step process/checklist and resolution guide for checking the stresses and nozzle loads on pumps. Of course, I've reveied all codes with him, but as you all know, the codes do not tell you how to do something, they just give limits. I do not quite have the experience necessary regarding pumps (and actually have asked a few questions myself and gotten no response) to really explain things properly, so actually would benefit greatly as well. I personally am tired of having to try to explain what 'negligible is' and justify the use of so many expansion joints on near ambient pumps, so, again, would appreciate better guidance.

Thanks!

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#42546 - 04/20/11 11:15 AM Re: Pump Analysis Education [Re: gBeals23]
danb Offline
Member

Registered: 04/22/05
Posts: 1453
Loc: ...
Ask him about tank "bulging", missalignment, settlement and things like this.

Regards,


Edited by danb (04/20/11 11:17 AM)
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Dan

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