I need your help to find out the correct thicknesses (by using PV Elite 2009)for flanges which are sealed with the tubesheet. TEMA named them as Packing Box (item#23) and Packing Gland (item#25)on page 4 (Red book). It was a unit of TEMA BEP Type.

For your further info, plz. have a look on Fig: UHX-14.1 (b) & Fig: 14.3 (a) Config. A.