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cast iron
Note:
See page 63 for pressure-temperature ratings.
Iron Flanges
Class 125 (Standard)
figure 1016
Reducing Flange
Pipe
Size
Diam. of
Flange
O
Min.Flange
Thickness
Q
Min. Diam.
of Hub
X
Min. Length
Thru Hub
Y
Unit Weight
Black
Galv.
To order reducing companion fanges, specify threaded or
reduced size frst, then the outside diameter of deisred fange.
For instance, if a reducing fange is required to connect a
5 NPS
(125 DN)
pipe to an 8 NPS
(200 DN)
valve or ftting
having a 13
1
/
2
inch
(338 DN)
OD fange, order 5 NPS x 13
1
/
2
inch
(125 x 338 DN)
reducing fange.
NPS DN in mm in mm in mm in mm lbs
kg
lbs
kg
1 25
5 127
9
/
16
14
1
15
/
16
49
11
/
16
17 2.75 1.25 –
–
1
1
/
4
32
2
5
/
16
59
13
/
16
22 2.50 1.13 –
–
1 25
6 152
5
/
8
16
11
5
/
16
49
11
/
16
17 5.00 2.27 –
–
1
1
/
4
32
2
5
/
16
59
13
/
16
22 4.75 2.15 –
–
1
1
/
2
40
2
9
/
16
65
7
/
8
22 4.50 2.04 4.50 2.04
1
1
/
2
40
7 178 1
1
/
16
27
2
9
/
16
65
7
/
8
22 7.00 3.17 7.00 3.17
2 50
3
1
/
16
78 1 25 6.75 3.06 6.75 3.06
1 25
7
1
/
2
191
3
/
4
19
1
15
/
16
49
13
/
16
22 9.00 4.08 –
–
1
1
/
2
40
2
9
/
16
65
7
/
8
22 8.75 3.97 8.75 3.97
2 50
3
1
/
16
78 1 25 8.50 3.85 8.50 3.85
2
1
/
2
65
3
9
/
16
90 1
1
/
8
29 8.00 3.63 8.00 3.63
3 80 8
1
/
2
203 1
3
/
16
30 4
1
/
4
108 1
3
/
16
30 10.00 4.54 –
–
1
1
/
2
40
9 229 1
5
/
16
33
2
9
/
16
65 1 25 14.00 6.35 14.00 6.35
2 50
3
1
/
16
78 1 25 14.00 6.35 14.00 6.35
2
1
/
2
65
3
9
/
16
90 1
1
/
8
29 13.50 6.12 13.50 6.12
3 80
4
1
/
4
108 1
3
/
16
30 12.75 5.78 12.75 5.78
3
1
/
2
90
4
13
/
16
124 1
1
/
4
32 12.00 5.44 –
–
3 80
10 254 1
5
/
16
33
4
1
/
4
108 1
3
/
16
30 17.00 7.71 17.00 7.71
4 100
5
5
/
16
135 1
5
/
16
33 16.00 7.26 16.00 7.26
1
1
/
2
40
11 279 1 25
2
9
/
16
65 1
1
/
16
27 27.00 12.24 –
–
2 50
3
1
/
16
78 1
1
/
16
27 26.00 11.79 26.00 11.79
2
1
/
2
65
3
9
/
16
90 1
1
/
8
29 25.00 11.34 25.00 11.34
3 80
4
1
/
4
108 1
3
/
16
30 23.00 10.43 23.00 10.43
4 100
5
5
/
16
135 1
5
/
16
33 21.00 9.52 21.00 9.52
5 125
6
7
/
16
164 1
7
/
16
37 19.00 8.62 19.00 8.62
2 50
13
1
/
2
343 1
1
/
8
29
3
1
/
16
78 1
3
/
16
30 44.00 19.95 –
–
3 80
4
1
/
4
108 1
3
/
16
30 40.00 18.14 40.00 18.14
4 100
5
5
/
16
135 1
5
/
16
33 37.00 16.78 37.00 16.78
5 125
6
7
/
16
164 1
7
/
16
37 34.00 15.42 –
–
6 150
7
9
/
16
192 1
9
/
16
40 31.00 14.06 31.00 14.06
6 150
16 406 1
3
/
16
30
7
9
/
16
192 1
9
/
16
40 53.00 24.04 –
–
8 200
9
11
/
16
246 1
3
/
4
44 50.00 22.68 –
–
6 150
19 483 1
1
/
4
32
7
9
/
16
192 1
9
/
16
40 88.00 39.91 –
–
8 200
9
11
/
16
246 1
3
/
4
44 81.00 36.73 –
–
Class 125 (Standard) Iron Flanges are manufactured to American National Standard ASME B16.1.
X
O
Q Y