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ASME VIII Div.1 Addenda 11a
2.7
Circular flat flanges without hubs: lap joint: to internal pressure: gasket laying inside inner edge of bolt holes
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../../Images/vessels/ASME_VIIID1/2_7lap.png
boltnbBA2specMaterialFspecMaterialBtfdgidgoCAgaskfacingbobbliqheightliqdensGB2hGhD
1
designPress
Design pressure: at top:
2
localPress
Design pressure: at location:
3
designTemp
Design temperature:
4
MAWP
Max.allow.working pressure: at top:
MATERIALS
FLANGE
BOLTS
5
ProductB
ProductF
Product form:
6
allowStressB
allowStressF
Unit for: Stress
Allow.stress: at design temperature:
7
allowStressaB
allowStressaF
''
at room temperature:
8
 
EF
Unit for: Elastic modulus
Elastic modulus: at temperature:
JOINT
9
yy
mm
Gasket factors:
10
Ab
Abolt
Unit for: Area
Effective bolt cross section area:
11
Y
K
Factor:
CALCULATION
OPERATING
GASK.SEATING
12
 
H
Unit for: Load
Hydrostatic end force: total:
13
 
HHD
''
Hydrostatic end force: inside:
14
 
HHT
''
Hydrostatic end force: annular:
15
 
HHp
''
Gasket compression load:
16
Wm2
Wm1
''
Minimum bolt load:
17
Am2
Am1
Unit for: Area
Required bolt section:
18
resultBolt
Result for: Bolt stress:
19
W2
W1
Unit for: Load
Design bolt load:
20
Mo2
Mo1
Unit for: Moment
Design flange moment:
21
ST2
ST1
Unit for: Stress
Tangential flange stress:
22
Sa2
Sa1
''
Allowable stress for flange:
23
J
Flange rigidity index:
24
result
Final result:
NOTE: lap shear stress: to be checked in a separate calculation
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