Bolting Dimensions for 150 lb. Flanges
Nom
Pipe
Size |
Diam
of Bolt
Circle |
Diam
of
Bolts |
Nbr.
of
Bolts |
Length of Studs 1/16" Raised Face |
Bolt
Length |
| 0.50 |
2.375 |
0.500 |
4 |
2.250 |
1.750 |
| 0.75 |
2.750 |
0.500 |
4 |
2.250 |
2.000 |
| 1.00 |
3.125 |
0.500 |
4 |
2.500 |
2.000 |
| 1.25 |
3.500 |
0.500 |
4 |
2.500 |
2.250 |
| 1.50 |
3.875 |
0.500 |
4 |
2.750 |
2.250 |
| 2.00 |
4.750 |
0.625 |
4 |
3.000 |
2.750 |
| 2.50 |
5.500 |
0.625 |
4 |
3.250 |
3.000 |
| 3.00 |
6.000 |
0.625 |
4 |
3.500 |
3.000 |
| 3.50 |
7.000 |
0.625 |
8 |
3.500 |
3.000 |
| 4.00 |
7.500 |
0.625 |
8 |
3.500 |
3.000 |
| 5.00 |
8.500 |
0.750 |
8 |
3.750 |
3.250 |
| 6.00 |
9.500 |
0.750 |
8 |
3.750 |
3.250 |
| 8.00 |
11.750 |
0.750 |
8 |
4.000 |
3.500 |
| 10.00 |
14.250 |
0.875 |
12 |
4.500 |
3.750 |
| 12.00 |
17.000 |
0.875 |
12 |
4.500 |
4.000 |
| 14.00 |
18.750 |
1.000 |
12 |
5.000 |
4.250 |
| 16.00 |
21.250 |
1.000 |
16 |
5.250 |
4.500 |
| 18.00 |
22.750 |
1.125 |
16 |
5.750 |
4.750 |
| 20.00 |
25.000 |
1.125 |
20 |
6.000 |
5.250 |
| 22.00 |
27.250 |
1.250 |
20 |
6.500 |
5.500 |
| 24.00 |
29.500 |
1.250 |
20 |
6.750 |
5.750 |
| 26.00 |
31.750 |
1.250 |
24 |
7.000 |
6.000 |
| 30.00 |
36.000 |
1.250 |
28 |
7.250 |
6.250 |
| 34.00 |
40.500 |
1.500 |
32 |
8.000 |
7.000 |
| 36.00 |
42.750 |
1.500 |
32 |
8.250 |
7.000 |
| 42.00 |
49.500 |
1.500 |
36 |
8.750 |
7.500 |
Stud lengths for lap joint flanges are equal to lengths shown plus the thickness of two laps of the stub ends.
Bolting arrangements for 125 lb. cast iron flanges are the same as shown for 150 lb. steel flanges. |
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