ANSI 150 Lb. Plate Flange Specifications
| Nominal Pipe Size | Pipe O.D. of Flange | Bore I.D. Diameter | Bolt Holes | Hole Diameter | Bolt Circle Diameter |
| 1/2 | 3 1/2 | .88 | 4 | 5/8 | 2 3/8 |
| 3/4 | 3 7/8 | 1.09 | 4 | 5/8 | 2 3/4 |
| 1 | 4 1/4 | 1.36 | 4 | 5/8 | 3 1/8 |
| 1 1/4 | 4 5/8 | 1.70 | 4 | 5/8 | 3 1/2 |
| 1 1/2 | 5 | 1.95 | 4 | 5/8 | 3 7/8 |
| 2 | 6 | 2.44 | 4 | 3/4 | 4 3/4 |
| 2 1/2 | 7 | 2.94 | 4 | 3/4 | 5 1/2 |
| 3 | 7 1/2 | 3.57 | 4 | 3/4 | 6 |
| 3 1/2 | 8 1/2 | 4.07 | 8 | 3/4 | 7 |
| 4 | 9 | 4.57 | 8 | 3/4 | 7 1/2 |
| 5 | 10 | 5.66 | 8 | 7/8 | 8 1/2 |
| 6 | 11 | 6.72 | 8 | 7/8 | 9 1/2 |
| 8 | 13 1/2 | 8.72 | 8 | 7/8 | 11 3/4 |
| 10 | 16 | 10.88 | 12 | 1 | 14 1/4 |
| 12 | 19 | 12.88 | 12 | 1 | 17 |
| 14 | 21 | 14.14 | 12 | 1 1/8 | 18 3/4 |
| 16 | 23 1/2 | 16.16 | 16 | 1 1/8 | 21 1/4 |
| 18 | 25 | 18.18 | 16 | 1 1/4 | 22 3/4 |
| 20 | 27 1/2 | 20.20 | 20 | 1 1/4 | 25 |
| 24 | 32 | 24.25 | 20 | 1 3/8 | 29 1/2 |