Tubesheet Tube Hole Grooving Depth

[uglyspec]

Hi,

For double grooved and roller expanded tube to tubesheet joints on a shell and tube heat exchanger, what tube hole groove DEPTH are you using?

Thanks!

 

[Christine74]

TEMA RB-7.24/C-7.24 specifies a groove depth of 1/64".


-Christine

 

[EdStainless]

When you are working with soft tube alloys and stronger tubesheet alloys then a couple of larger grooves help.
When the strength of the two are very similar, or the tubes are stronger than the tubsheet then a series of very small and shallow grooves works much better.

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P.E. Metallurgy

 

[uglyspec]

Somewhat related topic, as a standard our company utilizes a 1/16" x 45 deg chamfer on the shell side of every tubesheet tube hole. No chamfer on the tube side hole. Is a shell side chamfer common industry practice?

Thanks again!

 

[chicopee]

A seminar presented by a mechanical specialist which I attended in 1984 indicated that groove width be 1/8 inch, depth be 1/32 inch and their spacing between center lines 1/2 inch. Note there are other restrictions based on tube sheet thickness and expanding tube ends. Babcock and Wilcox has done extensive research work on the subject so dig some more on the subject as I am only answering your OP.