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Cast Iron Flanges - ASME/ANSI Class
125
ASME/ANSI B16.1 - 1998 - Cast Iron
Pipe Flanges and Flanged Fittings - Class 125 Flanges - outside
and inside diameters, bolt circles, numbers and diameters of bolts
| Cast Iron Flanges - ASME/ANSI
125 lb |
Pipe Size
(inches) |
Outside Diameter
(inches) |
Number of Bolt Holes |
Bolt
Hole Diameter
(inches) |
Bolt
Circle
(inches) |
| 1 |
4-1/4 |
4 |
5/8 |
3-1/8 |
| 1-1/4 |
4-5/8 |
4 |
5/8 |
3-1/2 |
| 1-1/2 |
5 |
4 |
5/8 |
3-7/8 |
| 2 |
6 |
4 |
3/4 |
4-3/4 |
| 2-1/2 |
7 |
4 |
3/4 |
5-1/2 |
| 3 |
7-1/2 |
4 |
3/4 |
6 |
| 3-1/2 |
8-1/2 |
8 |
3/4 |
7 |
| 4 |
9 |
8 |
3/4 |
7-1/2 |
| 5 |
10 |
8 |
7/8 |
8-1/2 |
| 6 |
11 |
8 |
7/8 |
9-1/2 |
| 8 |
13-1/2 |
8 |
7/8 |
11-3/4 |
| 10 |
16 |
12 |
1 |
14-1/4 |
| 12 |
19 |
12 |
1 |
17 |
| 14 |
21 |
12 |
1-1/8 |
18-3/4 |
| 16 |
23-1/2 |
16 |
1-1/8 |
21-1/4 |
| 18 |
25 |
16 |
1-1/4 |
22-3/4 |
| 20 |
27-1/2 |
20 |
1-1/4 |
25 |
| 24 |
32 |
20 |
1-3/8 |
29-1/2 |
| 30 |
38-3/4 |
28 |
1-3/8 |
36 |
| 36 |
46 |
32 |
1-5/8 |
42-3/4 |
| 42 |
53 |
36 |
1-5/8 |
49-1/2 |
| 48 |
59-1/2 |
44 |
1-5/8 |
56 |
| 54 |
66-1/4 |
44 |
2 |
62-3/4 |
| 60 |
73 |
52 |
2 |
69-1/4 |
| 72 |
86-1/2 |
60 |
2 |
82-1/2 |
| 84 |
99-3/4 |
64 |
2-1/4 |
95-1/2 |
| 96 |
113-1/4 |
68 |
2-1/2 |
108-1/2 |
|
