Specifies the stress induced in the bolt during tightening after the flange has been seated. This is the stress in the bolt when the system is about to be pressurized and thermally loaded.
Typical units (depending on your unit system):
-
lb/in2
-
KPa
-
N/mm²
If this value is omitted, the software uses the following bolt tightening rule to compute the tightening stress in the bolt. (In English units: Initial Stress = 45,000/(nominal bolt diameter)1/2).
This entry is used only in the flexibility model of the flange to estimate the initial compression of the gasket.