Bolt Torque Values Class 150
Torque Values ASME B16.5 Raised Face Flanges with A193 Grade B7 Bolts
Nom Pipe Size (inches) |
No. of Bolts |
Size of Bolts (inches) |
Internal Pressure (psig) |
Minimum Torque (ft. lbs.) |
Preferred Torque (ft. lbs.) |
1/2 |
4 |
1/2 |
300 |
9 |
28 |
3/4 |
4 |
1/2 |
300 |
13 |
40 |
1 |
4 |
1/2 |
300 |
17 |
53 |
1-1/4 |
4 |
1/2 |
300 |
26 |
60 |
1-1/2 |
4 |
1/2 |
300 |
35 |
60 |
2 |
4 |
5/8 |
300 |
69 |
120 |
2-1/2 |
4 |
5/8 |
300 |
81 |
120 |
3 |
4 |
5/8 |
300 |
119 |
120 |
3-1/2 |
8 |
5/8 |
300 |
66 |
120 |
4 |
8 |
5/8 |
300 |
84 |
120 |
5 |
8 |
3/4 |
300 |
117 |
200 |
6 |
8 |
3/4 |
300 |
148 |
200 |
8 |
8 |
3/4 |
300 |
200 |
200 |
10 |
12 |
7/8 |
300 |
188 |
320 |
12 |
12 |
7/8 |
300 |
250 |
320 |
14 |
12 |
1 |
300 |
317 |
490 |
16 |
16 |
1 |
300 |
301 |
490 |
18 |
16 |
1-1/8 |
300 |
448 |
710 |
20 |
20 |
1-1/8 |
300 |
395 |
710 |
24 |
20 |
1-1/4 |
300 |
563 |
1000 |