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ASME Heat exchanger with tubesheet cutout, a asymmetrical tube layout, rectangular tubesheet

ASME Heat exchanger with tubesheet cutout, a asymmetrical tube layout, rectangular tubesheet

ASME Heat exchanger with tubesheet cutout, a asymmetrical tube layout, rectangular tubesheet

(OP)
Any advice on the following would be greatly appreciated. I've been tasked with doing the ASME Section VIII code calculations for a heat exchanger. However I think it is out of the scope of part UHX for the following reasons: It has a segment of a circle (moon) shaped cutout in the tubesheet, an asymmetrical tube layout and while the shell is cylindrical, the outer shape of the tubesheet is a rectangle. The attached picture should help explain. Can I use part UHX? If not, is there another resource? FEA the only option? thanks!

RE: ASME Heat exchanger with tubesheet cutout, a asymmetrical tube layout, rectangular tubesheet

jimmyhutmacher, you can likely run this tubesheet in Part UHX, but what will you get? I wouldn't especially trust the output.

Your best bet short of FEA might be a UG-34 calculation perhaps incorporating a ligament efficiency. You could perhaps treat the plate as round. The cutout will not be adequately addressed by this approach of course.

I think you are stuck :)

Regards,

Mike

The problem with sloppy work is that the supply FAR EXCEEDS the demand

RE: ASME Heat exchanger with tubesheet cutout, a asymmetrical tube layout, rectangular tubesheet

(OP)
Thanks for the reply. I agree that one couldn't trust the results of Part UHX. the biggest problem is that in both UG-34 and part UHX, the cutout cannot be address and will greatly affect the strength of the tubesheet. This is why I think finite element analysis might be the only option but we don't have that capability at our office and we've already been awarded the job. Any help would be appreciated!! thanks, in advance

RE: ASME Heat exchanger with tubesheet cutout, a asymmetrical tube layout, rectangular tubesheet

Oh, you really are stuck :)

All I could suggest is full area replacement on the opening.

Regards,

Mike

The problem with sloppy work is that the supply FAR EXCEEDS the demand

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