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Table1: Stud Bolt for ANSI Flange - Raised Face Type |
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| Nominal | Class 150 | Class 300 | Class 400 |
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| Imp | NB | dia | len | nbr | dia | len | nbr | dia | len | nbr | |
| 1/2" | 15 | 1/2 | 2.1/4 | 4 | 1/2 | 2.1/2 | 4 | 1/2 | 3 | 4 | |
| 3/4" | 20 | 1/2 | 2.1/2 | 4 | 5/8 | 3 | 4 | 5/8 | 3.1/2 | 4 | |
| 1" | 25 | 1/2 | 2.1/2 | 4 | 5/8 | 3 | 4 | 5/8 | 3.1/2 | 4 | |
| 1.1/4" | 32 | 1/2 | 2.3/4 | 4 | 5/8 | 3.1/4 | 4 | 5/8 | 3.3/4 | 4 | |
| 1.1/2" | 40 | 1/2 | 2.3/4 | 4 | 3/4 | 3.1/2 | 4 | 3/4 | 4.1/4 | 4 | |
| 2" | 50 | 5/8 | 3.1/4 | 4 | 5/8 | 3.3/4 | 8 | 5/8 | 4.1/4 | 8 | |
| 2.1/2" | 65 | 5/8 | 3.1/2 | 4 | 3/4 | 4 | 8 | 3/4 | 4.3/4 | 8 | |
| 3" | 80 | 5/8 | 3.1/2 | 4 | 3/4 | 4.1/4 | 8 | 3/4 | 5 | 8 | |
| 4" | 100 | 5/8 | 3.1/2 | 8 | 3/4 | 4.1/2 | 8 | 7/8 | 5.1/2 | 8 | |
| 5" | 125 | 3/4 | 3.3/4 | 8 | 3/4 | 4.3/4 | 8 | 7/8 | 5.3/4 | 8 | |
| 6" | 150 | 3/4 | 4 | 8 | 3/4 | 4.3/4 | 12 | 7/8 | 6 | 12 | |
| 8" | 200 | 3/4 | 4.1/4 | 8 | 7/8 | 5.1/2 | 12 | 1 | 6.3/4 | 12 | |
| 10" | 250 | 7/8 | 4.1/2 | 12 | 1 | 6.1/4 | 16 | 1.1/8 | 7.1/2 | 16 | |
| 12" | 300 | 7/8 | 4.3/4 | 12 | 1.1/8 | 6.3/4 | 16 | 1.1/4 | 8 | 16 | |
| 14" | 350 | 1 | 5.1/4 | 12 | 1.1/8 | 7 | 20 | 1.1/4 | 8.1/4 | 20 | |
| 16" | 400 | 1 | 5.1/4 | 16 | 1.1/4 | 7.1/2 | 20 | 1.3/8 | 8.3/4 | 20 | |
| 18" | 450 | 1.1/8 | 5.3/4 | 16 | 1.1/4 | 7.3/4 | 24 | 1.3/8 | 9 | 24 | |
| 20" | 500 | 1.1/8 | 6.1/4 | 20 | 1.1/4 | 8 | 24 | 1.1/2 | 9.1/2 | 24 | |
| 24" | 600 | 1.1/4 | 6.3/4 | 20 | 1.1/2 | 9 | 24 | 1.3/4 | 10.1/2 | 24 | |
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dimension in inch [dia] = Stud Bolt Diameter, [len] = Length of Bolt, [nbr] = Set Number of Stud Bolt for one set of flange |
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