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ASME VIII Div.1 Addenda 11a
2.7
Circular flanges with hub: hub with constant thickness: loose, welded: fig.2-4(3): to internal pressure: gasket laying inside inner edge of bolt holes: with bolt spacing correction
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../../Images/vessels/ASME_VIIID1/2_7l3.png
boltnbBspecMaterialFspecMaterialBg1teffdgidgoCAgaskfacingbobbliqheightliqdensGhhhGhDhT
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
Allow.stress: at design temperature:
7
allowStressaB
allowStressaF
Allow.stress: at room temperature:
8
 
EF
Elastic modulus: at temperature:
JOINT
9
mm
Gasket factor:
10
yy
Gasket seating stress: minimum:
11
db
Nominal bolt diameter:
12
Bs
Bolt spacing:
13
BSC
Bolt spacing factor:
14
Abolt
Effective bolt cross section area: per bolt:
15
Ab
Effective bolt cross section area: total:
FLANGE RIGIDITY
16
J
Flange rigidity index:
RESULT
17
result
Final result:
www.xcalcs.com
numTotPag
numPag1
(follows on next page)
 
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ASME VIII Div.1 Addenda 11a
2.7
Circular flanges with hub: hub with constant thickness: loose, welded: fig.2-4(3): to internal pressure: gasket laying inside inner edge of bolt holes: with bolt spacing correction
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(follows from previous page)
FACTORS
18
T
ho
K
19
U
ff
VL
20
Y
Z
FL
21
dd
ee
L
 
OPERATING
GASK.SEATING
22
 
H
Hydrostatic end force: total:
23
 
HHD
Hydrostatic end force: inside:
24
 
HHT
Hydrostatic end force: annular:
25
 
HHp
Gasket compression load:
26
Wm2
Wm1
Minimum bolt load:
27
Am2
Am1
Required bolt section:
28
resultBolt
Result for: Bolt stress:
29
W2
W1
Design bolt load:
30
Mo2
Mo1
Design flange moment:
31
SH2
SH1
Hub stress: longitudinal:
32
SHa2
SHa1
Hub stress: allowable:
33
resultHub2
resultHub1
Result for: Hub stress:
34
SR2
SR1
Radial flange stress:
35
ST2
ST1
Tangential flange stress:
36
SHR2
SHR1
(SH+SR)/2:
37
STR2
STR1
(ST+SR)/2:
38
Sa2
Sa1
Allowable stress for flange:
39
resultFlg2
resultFlg1
Result for: Flange stress:
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numTotPag
numPag2

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2.7: integral
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2.7: loose
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2.7: int.: w.bolt correction
2.7: l.hub: w.bolt correction
2.7: loose: w.bolt correction
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