Bolt calulations

[gcostanzo]

Bolt calculations.   I understand how the program calculates for bolts.   Bolts on a 4" 150#  R.F. flange connection  is 3-1/2 inch long  Used with a bleed ring you add  + 1.5 for bleed ring + 1/8 for gasket + 1/8 for gasket = 5-1/4"

This is correct and it show correctly in the Bill of Material, but engineer would like to add 2"  to the bolt length every time a blind ring is used,  instead of 1-3/4".   I don't think this can be done.   If been trying.  At first I thought of just eliminating that length from the Bolt Length Calculation tables.  But then that length will be removed from every calculation.  That may cause problems later.

Has any one else had this issue,  Several Engineers I worked with in the past prefer to call out slight longer than standard bolt to be on safe side.  

[gcostanzo · Accepted solution]

  I found  a solution that works.   I was looking in the wrong place.  It is not in the calculation.  

In the bolt catalog on of the fields is for  the  base "bolt length"  for a basic flange to flange dimension, for that pressure class.   I increased that globally by 1/4" .  Saved the edits to the catalog, then updated the spec based on the catalog.  

so now when the program  calculates for the  bolts at the bleed ring it is  5-1/2",   which is what the engineer was looking for.   All the bolt will be 1/4 longer to be on the safe side.    I will have to reconnect all my flange connections now.