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ASME VIII Div.1 Addenda 99
Y-6.1
Flat face flanges with metal-to-metal contact outside the bolt circle: analysis of an identical (Class 1) flange pair: same material: integral (Cat.1) flanges: hub of constant thickness: with spacer: self-sealing gasket with negligible loads
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../../Images/vessels/ASME_VIIID1/y_6_1b.png
specMaterialFspecMaterialBCADiBDB1boltnbthgotfCAliqheightliqdensGhChDhTtspacerDspacer
1
designPress
Max.allowable working pressure: at top:
2
localPress
Max.allowable working pressure: at location:
3
designTemp
Design temperature:
MATERIALS-BOLTING
FLANGE
BOLTS
4
ProductB
ProductF
Product form:
5
allowStressB
allowStressF
Unit for: Stress
Allowable stress: at design temperature:
6
YoungB
YoungF
Unit for: Elastic modulus
Elastic modulus: at design temperature:
7
rE
Elasticity factor: at design temperature:
8
Abolt
Effective bolt cross section area: per bolt:
9
Ab
Effective bolt cross section area: total:
10
ll
Calculated strain length of bolt:
FORCES AND MOMENTS
11
H
Hydrostatic end force: total:
12
HHD
Hydrostatic end force: inside:
13
HHT
Hydrostatic end force: annular:
14
MP
Moment due to HD and HT (HG=0):
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numTotPag
numPag1
(follows on next page)
 
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um_visua
ASME VIII Div.1 Addenda 99
Y-6.1
Flat face flanges with metal-to-metal contact outside the bolt circle: analysis of an identical (Class 1) flange pair: same material: integral (Cat.1) flanges: hub of constant thickness: with spacer: self-sealing gasket with negligible loads
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(follows from previous page)
FACTORS
15
beta
aa
Shape factor:
16
rB
AR
Bolt hole factors:
17
JP
JS
Factor:
18
V
F
 
19
Z
K
 
20
Fp
ho
 
CALCULATION
21
MS
Flange moment due to flange-hub interaction:
22
Etheta
Slope of flange: at ID: times E:
23
HHC
Contact force between flanges at hC:
24
Wm1
Bolt load: min.: operating:
25
sigb
Bolt stress: operating:
26
Si
Bolt stress: design prestress:
27
resultBolt
Result for: Bolt stress:
28
SH
Hub stress: longitudinal:
29
SHa
Hub stress: allowable:
30
resultHub
Result for: Hub stress:
31
SRC
Radial flange stress: at bolt circle:
32
SRI
Radial flange stress: at ID:
33
STI
Tangential flange stress: at ID:
34
SHR
(SH+SR)/2: at ID:
35
STR
(ST+SR)/2: at ID:
36
Sa
Allowable stress: for the above:
37
resultFlg
Result for: Flange stress:
38
result
Final result:
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numTotPag
numPag2

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