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Example calculation

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
 
 

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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