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cast iron
Note:
See page 63 for pressure-temperature ratings.
Iron Flanges
Class 250 (Extra Heavy)
figure 1030
Reducing Flange
Pipe
Size
Diam. of
Flange
O
Min.
Flange
Thickness
Q
Min.
Length
Thru Hub
Y
Min.
Length
of Threads
T
Diam. of
Raised
Face
W
Unit Weight
Black
NPS DN in mm in mm in mm in mm in mm lbs
kg
2 50 8
1
/
4
210 1
1
/
8
29 1
1
/
4
32 1.00 25 5
11
/
16
144 14.25 6.46
2
1
/
2
65 8
1
/
4
210 1
1
/
8
29 1
7
/
16
37 1.14 29 5
11
/
16
144 13.50 6.12
3 80 10 254 1
1
/
4
32 1
9
/
16
40 1.20 30 6
15
/
16
176 22.75 10.32
4 100 11 279 1
3
/
8
35 1
3
/
4
44 1.30 33 8
5
/
16
211 30.00 13.61
figure 1021
Blind Flange
Pipe Size
Diam. of
Flange
O
Diam. of
Port
I
Min. Flange
Thickness
Q
Min. Metal
Thickness
V
Unit Weight
Black
NPS DN
in
mm in
mm in
mm in
mm lbs
kg
1
1
/
2
40 6
1
/
8
156 1
1
/
2
38 1
3
/
16
22
–
– 5.30 2.40
2
50 6
1
/
2
165 2
51
7
/
8
22
–
– 7.00 3.17
2
1
/
2
65 7
1
/
2
191 2
1
/
2
64
1
25
–
– 11.00 4.99
3
80 8
1
/
4
210 3
76 1
1
/
8
29
–
– 14.00 6.35
4 100 10 254 4 102 1
1
/
4
32
–
– 23.00 10.43
5 125 11 279 5 127 1
3
/
8
35
–
– 31.00 14.06
6 150 12
1
/
2
318 6 152 1
7
/
16
37
–
– 42.00 19.05
8 200 15 381 8 203 1
5
/
8
41
–
– 70.00 31.75
figure 1010T
Cast Iron Flanges for
Cast Iron Pipe
Size
Flange
OD
C.I. Pipe
O.D.
Flange
Thickness
Length
thru hub
Unit Weight
Black
NPS DN
in
mm in
mm in
mm in
mm lbs
kg
3
80 7
1
/
2
191 3.96 101
3
/
4
19 1
3
/
4
44 7.50 3.40
4 100 9 229 4.80 122
15
/
16
24 1
15
/
16
49 13.00 5.90
6 150 11 279 6.90 175 1
25 2
3
/
16
56 17.20 7.80
8 200 13
1
/
2
343 9.05 230 1
1
/
8
29 2
7
/
16
62 29.00 13.15
10 250 16 406 11.10 282 1
3
/
16
30 2
1
/
2
64 42.00 19.05
12 300 19 483 13.20 335 1
1
/
4
32 2
13
/
16
73 60.00 27.21
Flanges drilled to ASME B16.1. Class 125 Flanges furnished threaded, drilled and faced.
High Hub Flanges for C.I. Pipe
YQ
W
X
O
T
Q
Q
V
W
I
O
W
I
I
O