Bolt Torque Values Class 300
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 |
800 |
12 |
28 |
3/4 |
4 |
5/8 |
800 |
21 |
51 |
1 |
4 |
5/8 |
800 |
28 |
67 |
1-1/4 |
4 |
5/8 |
800 |
43 |
102 |
1-1/2 |
4 |
3/4 |
800 |
64 |
151 |
2 |
8 |
5/8 |
800 |
46 |
108 |
2-1/2 |
8 |
3/4 |
800 |
60 |
141 |
3 |
8 |
3/4 |
800 |
88 |
200 |
3-1/2 |
8 |
3/4 |
800 |
99 |
200 |
4 |
8 |
3/4 |
800 |
125 |
200 |
5 |
8 |
3/4 |
800 |
156 |
200 |
6 |
12 |
3/4 |
800 |
131 |
200 |
8 |
12 |
7/8 |
800 |
205 |
320 |
10 |
16 |
1 |
800 |
219 |
490 |
12 |
16 |
1-1/8 |
800 |
319 |
710 |
14 |
20 |
1-1/8 |
800 |
287 |
652 |
16 |
20 |
1-1/4 |
800 |
401 |
912 |
18 |
24 |
1-1/4 |
800 |
439 |
1000 |
20 |
24 |
1-1/4 |
800 |
484 |
1000 |
24 |
24 |
1-1/2 |
800 |
661 |
1552 |