Flanges are commonly used to connect valves into pipework making it easier
for removal and maintenance. There are many common flange standards and
flanges within the same standard can etiher be flat (commonly cast iron,
ductile iron) or raised face (commonly cast steel and stainless steel).
Below is a reference table for critical flange dimensions to help identify
what standard you have.
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|
Standard
|
Class
|
Diameter
|
Bolt Circle Diameter
|
Number of Bolts
|
Bolt Size
|
Diameter of Bolt Hole
|
|
AS4087
|
PN14
|
95
|
67
|
4
|
M12
|
14
|
|
AS 2129
|
Table C
|
95
|
67
|
4
|
M12
|
14
|
|
Table D
|
95
|
67
|
4
|
M12
|
14
|
|
Table E
|
95
|
67
|
4
|
M12
|
14
|
|
Table F
|
95
|
67
|
4
|
M12
|
14
|
|
Table H
|
115
|
83
|
4
|
M16
|
18
|
|
Table J
|
115
|
83
|
4
|
M16
|
18
|
|
ANSI B16.5
|
ANSI 150
|
89
|
60
|
4
|
1/2" (M14)
|
16
|
|
ANSI 300
|
95
|
67
|
4
|
1/2" (M14)
|
16
|
|
ANSI 600
|
95
|
67
|
4
|
1/2" (M14)
|
16
|
|
ANSI 900
|
121
|
83
|
4
|
3/4" (M20)
|
22
|
|
ANSI 1500
|
121
|
83
|
4
|
3/4" (M20)
|
22
|
|
ISO 7005 (DIN)
|
PN6
|
80
|
55
|
4
|
M10
|
11
|
|
PN10
|
95
|
65
|
4
|
M12
|
14
|
|
PN16
|
95
|
65
|
4
|
M12
|
14
|
|
PN20
|
90
|
60.5
|
4
|
M14
|
16
|
|
PN25
|
95
|
65
|
4
|
M12
|
14
|
|
PN40
|
95
|
65
|
4
|
M12
|
14
|
|
Standard
|
Class
|
Diameter
|
Bolt Circle Diameter
|
Number of Bolts
|
Bolt Size
|
Diameter of Bolt Hole
|
|
AS4087
|
PN14
|
100
|
73
|
4
|
M12
|
14
|
|
AS 2129
|
Table C
|
100
|
73
|
4
|
M12
|
14
|
|
Table D
|
100
|
73
|
4
|
M12
|
14
|
|
Table E
|
100
|
73
|
4
|
M12
|
14
|
|
Table F
|
100
|
73
|
4
|
M12
|
14
|
|
Table H
|
115
|
83
|
4
|
M16
|
18
|
|
Table J
|
115
|
83
|
4
|
M16
|
18
|
|
ANSI B16.5
|
ANSI 150
|
98
|
70
|
4
|
1/2" (M14)
|
16
|
|
ANSI 300
|
117
|
83
|
4
|
5/8" (M16)
|
19
|
|
ANSI 600
|
117
|
83
|
4
|
5/8" (M16)
|
19
|
|
ANSI 900
|
130
|
89
|
4
|
3/4" (M20)
|
22
|
|
ANSI 1500
|
130
|
89
|
4
|
3/4" (M20)
|
22
|
|
ISO 7005 (DIN)
|
PN6
|
90
|
65
|
4
|
M10
|
11
|
|
PN10
|
105
|
75
|
4
|
M12
|
14
|
|
PN16
|
105
|
75
|
4
|
M12
|
14
|
|
PN20
|
100
|
70
|
4
|
M14
|
16
|
|
PN25
|
105
|
75
|
4
|
M12
|
14
|
|
PN40
|
105
|
75
|
4
|
M12
|
14
|
|
Standard
|
Class
|
Diameter
|
Bolt Circle Diameter
|
Number of Bolts
|
Bolt Size
|
Diameter of Bolt Hole
|
|
AS4087
|
PN14
|
115
|
83
|
4
|
M12
|
14
|
|
AS 2129
|
Table C
|
115
|
83
|
4
|
M12
|
14
|
|
Table D
|
115
|
83
|
4
|
M12
|
14
|
|
Table E
|
115
|
83
|
4
|
M12
|
14
|
|
Table F
|
120
|
87
|
4
|
M16
|
18
|
|
Table H
|
120
|
87
|
4
|
M16
|
18
|
|
Table J
|
120
|
87
|
4
|
M16
|
18
|
|
ANSI B16.5
|
ANSI 150
|
108
|
79
|
4
|
1/2" (M14)
|
16
|
|
ANSI 300
|
124
|
89
|
4
|
5/8" (M16)
|
19
|
|
ANSI 600
|
124
|
89
|
4
|
5/8" (M16)
|
19
|
|
ANSI 900
|
|
102
|
4
|
7/8" (M22)
|
25
|
|
ANSI 1500
|
|
102
|
4
|
7/8" (M22)
|
25
|
|
ISO 7005 (DIN)
|
PN6
|
100
|
78
|
4
|
M10
|
11
|
|
PN10
|
115
|
85
|
4
|
M12
|
14
|
|
PN16
|
115
|
85
|
4
|
M12
|
14
|
|
PN20
|
115
|
85
|
4
|
M14
|
16
|
|
PN25
|
115
|
85
|
4
|
M12
|
14
|
|
PN40
|
115
|
85
|
4
|
M12
|
14
|
|
Standard
|
Class
|
Diameter
|
Bolt Circle Diameter
|
Number of Bolts
|
Bolt Size
|
Diameter of Bolt Hole
|
|
AS4087
|
PN14
|
120
|
87
|
4
|
M12
|
14
|
|
AS 2129
|
Table C
|
120
|
87
|
4
|
M12
|
14
|
|
Table D
|
120
|
87
|
4
|
M12
|
14
|
|
Table E
|
120
|
87
|
4
|
M12
|
14
|
|
Table F
|
135
|
98
|
4
|
M16
|
18
|
|
Table H
|
135
|
98
|
4
|
M16
|
18
|
|
Table J
|
135
|
98
|
4
|
M16
|
18
|
|
ANSI B16.5
|
ANSI 150
|
117
|
89
|
4
|
1/2" (M14)
|
16
|
|
ANSI 300
|
133
|
98
|
4
|
5/8" (M16)
|
19
|
|
ANSI 600
|
133
|
98
|
4
|
5/8" (M16)
|
19
|
|
ANSI 900
|
159
|
111
|
4
|
7/8" (M22)
|
25
|
|
ANSI 1500
|
159
|
111
|
4
|
7/8" (M22)
|
25
|
|
ISO 7005 (DIN)
|
PN6
|
120
|
90
|
4
|
M12
|
14
|
|
PN10
|
140
|
100
|
4
|
M16
|
18
|
|
PN16
|
140
|
100
|
4
|
M16
|
18
|
|
PN20
|
120
|
89
|
4
|
M14
|
16
|
|
PN25
|
140
|
100
|
4
|
M16
|
18
|
|
PN40
|
140
|
100
|
4
|
M16
|
18
|
|
Standard
|
Class
|
Diameter
|
Bolt Circle Diameter
|
Number of Bolts
|
Bolt Size
|
Diameter of Bolt Hole
|
|
AS4087
|
PN14
|
135
|
98
|
4
|
M12
|
14
|
|
AS 2129
|
Table C
|
135
|
98
|
4
|
M12
|
14
|
|
Table D
|
135
|
98
|
4
|
M12
|
14
|
|
Table E
|
135
|
98
|
4
|
M12
|
14
|
|
Table F
|
140
|
105
|
4
|
M16
|
18
|
|
Table H
|
140
|
105
|
4
|
M16
|
18
|
|
Table J
|
140
|
105
|
4
|
M16
|
18
|
|
ANSI B16.5
|
ANSI 150
|
127
|
98
|
4
|
1/2" (M14)
|
16
|
|
|
