I am trying to confirm what has been done on a previous model.
Node 2000 is the piping flange node
Node 40 is the equipment flange node

An anchor restraint was applied to node 2000 with a CNode referencing node 40. The CNode connects nodes 2000 and 40 together. A stiffness of 1E06 was then applied to this CNode anchor.

I am trying to verify the use of the stiffness value of 1E06 for the bolted flange connection, but have not found a resource yet.

I am wondering if a software module within PRG FEA performs a stiffness calculation on bolted flange connections that would be applicable?