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longitudinal membrane stress in the tubes exceeded in floating head exchanger

longitudinal membrane stress in the tubes exceeded in floating head exchanger

longitudinal membrane stress in the tubes exceeded in floating head exchanger

(OP)
Hi all,
I'm doing the design of a floating head exchanger with microprotol.

I have a problem because the software indicate the following warning 'Tubesheet Loading conditions T0 [test condition] : longitudinal membrane stress in the tubes exceeded'.

What can i do in order to solve the problem?????

Thanks,

RE: longitudinal membrane stress in the tubes exceeded in floating head exchanger

ROMEUM2, I'm not familiar with your software, if that's what microprotol is. Can you confirm it is handling allowables and temperatures correctly?

The message does not make sense to me. For a pressure only case you would expect circumferential stress to govern, not lonitudinal, where a differential expansion usually is present.

I frankly have never seen this happen. It may be your only choice is to thicken up the tube wall.

Regards,

Mike

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