App.Y
Flat face flanges with metal-to-metal contact outside the bolt circle: analysis of a flange cover assembly (Class 3): integral (Cat.1) flange: hub of constant thickness: no spacer: self-sealing gasket with negligible loads
1
Max.allowable working pressure: at top:
2
Max.allowable working pressure: at location:
3
Design temperature:
MATERIALS-BOLTING
FLANGE:I
COVER:II
BOLTS
4
Product form:
5
Allowable stress: at design temperature:
6
Elastic modulus: at design temperature:
7

Factors:
8
Factors:
9
Effective bolt cross section area: per bolt:
10
Effective bolt cross section area: total:
11
Calculated strain length of bolt:
FORCES AND MOMENTS
12
Hydrostatic end force: total:
13
Hydrostatic end force: inside:
14
Hydrostatic end force: annular:
15
Moment due to HD and HT (HG=0):
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(follows on next page)

App.Y
Flat face flanges with metal-to-metal contact outside the bolt circle: analysis of a flange cover assembly (Class 3): integral (Cat.1) flange: hub of constant thickness: no spacer: self-sealing gasket with negligible loads
(follows from previous page)
FACTORS
16
Shape factor:
17
Bolt hole factors:
18
Factor:
19

20

21

22

23

CALCULATION
FLANGE:I
COVER:II
24
''
Rigid body rotation times E*:
25
''
Total flange moment at B1:
26
''
Unbalanced flange moment at B1:
27
''
Balanced flange moment at B1:
28
Slope of flange: at B1: times E:
29
Contact force between flanges at hC:
30
31
Bolt stress: operating:
32
Bolt stress: design prestress:
33
Result for: Bolt stress:
34

Hub stress: longitudinal: for cover:
35

''
Hub stress: allowable:
36

Result for: Hub stress:
37
''
38
''
39
''
Tangential stress:at ID: at ØB1:
40

''
(SH+SR)/2: at ØB: for flange:
41

''
(ST+SR)/2: at ØB: for flange:
42

''
Radial stress: at center: for cover:
43
''
Allowable stress: for the above:
44
Result for: Flange stress:
45
Final result:
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