Opening in Bolted Flat Cover

[Shmulik]

Hi all,
In order to design Opening and required reinforcement in Bolted Flat Cover, Figure UG-34 (j) or (k): finding the required cover thickness per UG-34 using Eq. (2) or Eq. (5), the thickness shall be calculated for both operating conditions and gasket seating, and the greater of the two values shall be used.
My question is: what thickness governs when calculating the required opening reinforcement per UG-39 ?
Shall we consider the operating conditions thickness as "Minimum Required thickness of flat" even when gasket seating conditions thickness is higher?

Thank you!

 

[gr2vessels]

No, you have to use the greater of the two values.
Cheers,
gr2vessels

 

[SnTMan]

So, for gasket seating case, entire nozzle wall thickness, less any CA, is availble for reinforcement?

Regards,

Mike