Expanded length of tube(ltx) to be considered in tubesheet calculation

[soletto]

Hallo guys,

i observed that a smaller expanded length leads to an increased tubesheet thickness.

This is not fully plausible to me...

Now my question is where do i find this in UHX 12 of ASME VIII division 1

Im looking for that equation but i couldnd find something in this chapter

Can anyone help me out where i exactly i find this?

Thank you BR Stefan

 

[BJI]

Tube expansion depth ratio, refer to UHX 11.5 and UHX 5.1