ANSI 2500-lb Flanges
| Nominal Pipe Size | Diameter of Studs | No. Of Studs |
Stud Bolt Length | Ring Joint Gasket No. |
|
|---|---|---|---|---|---|
| Raised Face | Ring Joint | ||||
| Inches | Inches | Inches | Inches | ||
| 1/2 | 3/4 | 4 | 4-3/4 | 4-3/4 | R13 |
| 3/4 | 3/4 | 4 | 4-3/4 | 5 | R16 |
| 1 | 7/8 | 4 | 5-1/4 | 5-1/2 | R18 |
| 1-1/4 | 1 | 4 | 6 | 6 | R21 |
| 1-1/2 | 1-1/8 | 4 | 6-1/2 | 6-3/4 | R23 |
| 2 | 1 | 8 | 6-3/4 | 7 | R26 |
| 2-1/2 | 1-1/8 | 8 | 7-3/4 | 8 | R28 |
| 3 | 1-1/4 | 8 | 8-1/2 | 9 | R32 |
| 4 | 1-1/2 | 8 | 9-3/4 | 10-1/4 | R38 |
| 5 | 1-3/4 | 8 | 11-3/4 | 12-1/4 | R42 |
| 6 | 2 | 8 | 13-1/2 | 14 | R47 |
| 8 | 2 | 12 | 15 | 15-1/2 | R51 |
| 10 | 2-1/2 | 12 | 19 | 20 | R55 |
| 12 | 2-3/4 | 12 | 21 | 22 | R60 |