Circular flanges
with multiple gaskets
Attention!
This calculation is only a simplified estimation, and does not replace a detailed design calculation.
Flange
upper
lower
Inside diameter
mm
Outside diameter
mm
Neck outside diameter
mm
Flange height
mm
Flange thickness
mm
Elastic modulus at 20 °C
MPa
Elastic modulus at temperature
MPa
Vessel shell
upper
lower
Inside diameter
mm
Thickness
mm
Gaskets
I
II
III
(from inside to outside)
Inside diameter
mm
Outside diameter
mm
Thickness
mm
Tongue-groove gap
mm
Elastic modulus at 20 °C
MPa
Elastic modulus at temperature
MPa
Bolting
Bolting circle diameter
mm
Number of bolts
Bolt hole diameter
mm
Thread pitch diameter
mm
Bolt length
mm
Elastic modulus at 20 °C
MPa
Elastic modulus at temperature
MPa
Loads
Assembly
Test
Operating
Bolting preload force
kN (per bolt)
Inside pressure
bar
Pressure in gaskets interstice
bar
Additional axial force
kN
Calculate
Results:
Assembly
Test
Operating
Bolting force
kN (per bolt)
Flange declination
°
Gasket I
(innermost)
Gasket force
kN
Mean gasket pressure
MPa
Gasket II
Gasket force
kN
Mean gasket pressure
MPa
Gasket III
Gasket force
kN
Mean gasket pressure
MPa
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