Tube Hole Serrations in a Floating Tubesheet 1

[JBW76]

This will sound silly, but I have a legitimate question.

Is there any reason or benefit why the floating tubesheet would NOT get tube hole serrations?

This is a Roller expanded only tube bundle (no Tube end welding)

Thanks in advance

 

[EdStainless]

in most cases the conventional (2 deep groove) serrations do not help improve leak tightness, and often do not improve pull out strength either. A series of many smaller grooves works better.
But that said it is no different for a floating head than a fixed one.

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P.E. Metallurgy, Plymouth Tube

 

[JBW76]

Thanks "EdStainless' - would you say it's common practice within the industry to have the serrations in both tubesheets though

 

[EdStainless]

They would usually be the same, since the load on each is the same. Either both with, or both without.
I could see a case where the floating head is thicker and someone saying that the deeper joint will be strong enough without grooves, but that makes me suspicious of the other TS.

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P.E. Metallurgy, Plymouth Tube