Pipe Size (NPS) | Class 150 | Class 300 | Class 400 | Class 600 | Class 900 | Class 1500 | Class 2500 | Pipe Size (NPS) | ||||||||||||||
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# of Bolts | Bolt Diameter | Stud Bolt Length | # of Bolts | Bolt Diameter | Stud Bolt Length | # of Bolts | Bolt Diameter | Stud Bolt Length | # of Bolts | Bolt Diameter | Stud Bolt Length | # of Bolts | Bolt Diameter | Stud Bolt Length | # of Bolts | Bolt Diameter | Stud Bolt Length | # of Bolts | Bolt Diameter | Stud Bolt Length | ||
1/2 | 4 | 1/2 | 2 1/4 | 4 | 1/2 | 2 1/2 | 4 | 1/2 | 3 | 4 | 1/2 | 3 | 4 | 3/4 | 4 1/4 | 4 | 3/4 | 4 1/4 | 4 | 3/4 | 4 3/4 | 1/2 |
3/4 | 4 | 1/2 | 2 1/2 | 4 | 5/8 | 3 | 4 | 5/8 | 3 1/2 | 4 | 5/8 | 3 1/2 | 4 | 3/4 | 4 1/2 | 4 | 3/4 | 4 1/2 | 4 | 3/4 | 5 | 3/4 |
1 | 4 | 1/2 | 2 1/2 | 4 | 5/8 | 3 | 4 | 5/8 | 3 1/2 | 4 | 5/8 | 3 1/2 | 4 | 7/8 | 5 | 4 | 7/8 | 5 | 4 | 7/8 | 5 1/2 | 1 |
1 1/4 | 4 | 1/2 | 2 3/4 | 4 | 5/8 | 3 1/4 | 4 | 5/8 | 3 3/4 | 4 | 5/8 | 3 3/4 | 4 | 7/8 | 5 | 4 | 7/8 | 5 | 4 | 1 | 6 | 1 1/4 |
1 1/2 | 4 | 1/2 | 2 3/4 | 4 | 3/4 | 3 1/2 | 4 | 3/4 | 4 1/4 | 4 | 3/4 | 4 1/4 | 4 | 1 | 5 1/2 | 4 | 1 | 5 1/2 | 4 | 1 1/8 | 6 3/4 | 1 1/2 |
2 | 4 | 5/8 | 3 1/4 | 8 | 5/8 | 3 1/2 | 8 | 5/8 | 4 1/4 | 8 | 5/8 | 4 1/4 | 8 | 7/8 | 5 3/4 | 8 | 7/8 | 5 3/4 | 8 | 1 | 7 | 2 |
2 1/2 | 4 | 5/8 | 3 1/2 | 8 | 3/4 | 4 | 8 | 3/4 | 4 3/4 | 8 | 3/4 | 4 3/4 | 8 | 1 | 6 1/4 | 8 | 1 | 6 1/4 | 8 | 1 1/8 | 7 3/4 | 2 1/2 |
3 | 4 | 5/8 | 3 1/2 | 8 | 3/4 | 4 1/4 | 8 | 3/4 | 5 | 8 | 3/4 | 5 | 8 | 7/8 | 5 3/4 | 8 | 1 1/8 | 7 | 8 | 1 1/4 | 8 3/4 | 3 |
3 1/2 | 8 | 5/8 | 3 1/2 | 8 | 3/4 | 4 1/4 | 8 | 7/8 | 5 1/2 | 8 | 7/8 | 5 1/2 | - | - | - | - | - | - | - | - | - | 3 1/2 |
4 | 8 | 5/8 | 3 1/2 | 8 | 3/4 | 4 1/2 | 8 | 7/8 | 5 1/2 | 8 | 7/8 | 5 3/4 | 8 | 1 1/8 | 6 3/4 | 8 | 1 1/4 | 7 3/4 | 8 | 1 1/2 | 10 | 4 |
5 | 8 | 3/4 | 3 3/4 | 8 | 3/4 | 4 3/4 | 8 | 7/8 | 5 3/4 | 8 | 1 | 6 1/2 | 8 | 1 1/4 | 7 1/2 | 8 | 1 1/2 | 9 3/4 | 8 | 1 3/4 | 11 3/4 | 5 |
6 | 8 | 3/4 | 4 | 12 | 3/4 | 4 3/4 | 12 | 7/8 | 6 | 12 | 1 | 6 3/4 | 12 | 1 1/8 | 7 1/2 | 12 | 1 3/8 | 10 1/4 | 8 | 2 | 13 1/2 | 6 |
8 | 8 | 3/4 | 4 1/4 | 12 | 7/8 | 5 1/2 | 12 | 1 | 6 3/4 | 12 | 1 1/8 | 7 1/2 | 12 | 1 3/8 | 8 3/4 | 12 | 1 5/8 | 11 1/2 | 12 | 2 | 15 | 8 |
10 | 12 | 7/8 | 4 1/2 | 16 | 1 | 6 1/4 | 16 | 1 1/8 | 7 1/2 | 16 | 1 1/4 | 8 1/2 | 16 | 1 3/8 | 9 1/4 | 12 | 1 7/8 | 13 1/4 | 12 | 2 1/2 | 19 1/4 | 10 |
12 | 12 | 7/8 | 4 3/4 | 16 | 1 1/8 | 6 3/4 | 16 | 1 1/4 | 8 | 20 | 1 1/4 | 8 3/4 | 20 | 1 3/8 | 10 | 16 | 2 | 14 3/4 | 12 | 2 3/4 | 21 1/4 | 12 |
14 | 12 | 1 | 5 1/4 | 20 | 1 1/8 | 7 | 20 | 1 1/4 | 8 1/4 | 20 | 1 3/8 | 9 1/4 | 20 | 1 1/2 | 10 3/4 | 16 | 2 1/4 | 16 | - | - | - | 14 |
16 | 16 | 1 | 5 1/4 | 20 | 1 1/4 | 7 1/2 | 20 | 1 3/8 | 8 3/4 | 20 | 1 1/2 | 10 | 20 | 1 5/8 | 11 1/4 | 16 | 2 1/2 | 17 1/2 | - | - | - | 16 |
18 | 16 | 1 1/8 | 5 3/4 | 24 | 1 1/4 | 7 3/4 | 24 | 1 3/8 | 9 | 20 | 1 5/8 | 10 3/4 | 20 | 1 7/8 | 12 3/4 | 16 | 2 3/4 | 19 1/4 | - | - | - | 18 |
20 | 20 | 1 1/8 | 6 1/4 | 24 | 1 1/4 | 8 | 24 | 1 1/2 | 9 1/2 | 24 | 1 5/8 | 11 1/4 | 20 | 2 | 13 3/4 | 16 | 3 | 21 1/4 | - | - | - | 20 |
22 | 20 | 1 1/4 | 6 1/2 | 24 | 1 1/2 | 8 3/4 | 24 | 1 5/8 | 10 | 24 | 1 5/8 | 12 | - | - | - | - | - | - | - | - | - | 22 |
24 | 20 | 1 1/4 | 6 3/4 | 24 | 1 1/2 | 9 | 24 | 1 3/4 | 10 1/2 | 24 | 1 7/8 | 13 | 20 | 2 1/2 | 17 1/4 | 16 | 3 1/2 | 24 1/4 | - | - | - | 24 |