Flange Data is per ANSI/ASME B16.5
| Size (in.) |
ANSI Class 150 Nominal Flange Dimensions inches | |||
| OD | Thickness | (No.)
& Dia. of Bolt Holes |
Bolt
Circle Diameter |
|
| 1/2 | 3 1/2 | 7/16 | (4) 5/8 | 2 3/8 |
| 3/4 | 3 7/8 | 1/2 | (4) 5/8 | 2 3/4 |
| 1 | 4 1/4 | 9/16 | (4) 5/8 | 3 1/8 |
| 1 1/2 | 5 | 11/16 | (4) 5/8 | 3 7/8 |
| 2 | 6 | 3/4 | (4) 3/4 | 4 3/4 |
| 3 | 7 1/2 | 15/16 | (4) 3/4 | 6 |
| 4 | 9 | 15/16 | (8) 3/4 | 7 1/2 |
| 6 | 11 | 1 | (8) 7/8 | 9 1/2 |
| 8 | 13 1/2 | 1 1/8 | (8) 7/8 | 11 3/4 |
| 10 | 16 | 1 3/16 | (12) 1 | 14 1/4 |
| 12 | 19 | 1 1/4 | (12) 1 | 17 |
| Size (in.) |
ANSI Class 300 Nominal Flange Dimensions, inches | |||
| OD | Thickness | (No.)
& Dia. of Bolt Holes |
Bolt
Circle Diameter |
|
| 1/2 | 3 3/4 | 9/16 | (4) 5/8 | 2 5/8 |
| 3/4 | 4 5/8 | 5/8 | (4) 3/4 | 3 1/4 |
| 1 | 4 7/8 | 11/16 | (4) 3/4 | 3 1/2 |
| 1 1/2 | 6 1/8 | 13/16 | (4) 7/8 | 4 1/2 |
| 2 | 6 1/2 | 7/8 | (8) 3/4 | 5 |
| 3 | 8 1/4 | 1 1/8 | (8) 7/8 | 6 5/8 |
| 4 | 10 | 1 1/4 | (8) 7/8 | 7 7/8 |
| 6 | 12 1/2 | 1 7/16 | (12) 7/8 | 10 5/8 |
| 8 | 15 | 1 5/8 | (12) 1 | 13 |
| 10 | 17 1/2 | 1 7/8 | (16) 1 1/8 | 15 1/4 |
| 12 | 20 1/2 | 2 | (16) 1 1/4 | 17 3/4 |