Please enable JavaScript.
Coggle requires JavaScript to display documents.
Flange design - Coggle Diagram
Flange design
2-5 Bolt loads
b) Design conditions
Gasket seating
Operating conditions
c) Required bolt loads
For gasket seating : Wm2
For the operating conditions : Wm1
a) General requirements
d) Total required and Actual bolts areas, Am and Ab.
e) Flange design bolt load W
Step 7 : Calculation of flange stresses
Radial flange stress - Sr
Tangential flange stress - St
Longitudinal hub stress - Sh
To compare with 2-8
Step 1 : calculation of required bolt loads
For operating condition = Wm1
H = total hydrostatic end force
Hp = total joint-contact surface compression load
m = maintenance factor
1) Gasket compression in gasket seating conditions
2) Gasket relaxation in operating conditions
For gasket seating condition = Wm2
Step 2 : Calculation of required bolt area
Am = total required cross sectional area of bolt
Bolt area for gasket seating
Bolt area for operating conditions
Ab = actual bolt area
Step 5 : Calculation of flange moment Mo
For operating conditions
MT
MD
MG
For gasket seating conditions
Step 3 : Maximum bolt spacing between bolts
Bs max
Step 4 : Calculation of flange design bolt load
W
For operating conditions : W=Wm1
For gasket seating conditions : Wm2
2-6 Flange moment
2-7 Calculation of flange stresses
2-8 Allowable flange design stresses
Step 6 : Calculation of bolt space correction factor
Flange rigidity