All dimensions are in "mm" unless noted otherwise.
Dimensions of Class 1500 RF Blind Flanges as per ASME B16.5.
| Nominal Pipe Size |
OD of Flange (D) |
Thickness of Flange (B) |
Dia of Raised Face (G) |
No of Bolt Holes |
Dia of Bolt Holes (L) |
Dia of Bolt (inches) |
Dia of Bolt Circle (K) |
Approx Weight (kg) |
|---|---|---|---|---|---|---|---|---|
| 1/2 | 120.7 | 22.4 | 35.1 | 4 | 22.4 | 3/4 | 82.6 | 2 |
| 3/4 | 130 | 25.4 | 42.9 | 4 | 22.4 | 3/4 | 88.9 | 3 |
| 1 | 149.4 | 28.4 | 50.8 | 4 | 25.4 | 7/8 | 101.6 | 4 |
| 1-1/4 | 158.8 | 28.4 | 63.5 | 4 | 25.4 | 1 | 111.3 | 4 |
| 1-1/2 | 177.8 | 31.8 | 73.2 | 4 | 28.4 | 1-1/8 | 124 | 6 |
| 2 | 215.9 | 38.1 | 91.9 | 8 | 25.4 | 1 | 165.1 | 11 |
| 2-1/2 | 244.3 | 41.1 | 104.6 | 8 | 28.4 | 1-1/8 | 190.5 | 16 |
| 3 | 266.7 | 47.8 | 127 | 8 | 31.8 | 1-1/4 | 203.2 | 22 |
| 4 | 311.2 | 53.8 | 157.2 | 8 | 35.1 | 1-1/2 | 241.3 | 33 |
| 5 | 374.7 | 73.2 | 185.7 | 8 | 41.1 | 1-3/4 | 292.1 | 64 |
| 6 | 393.7 | 82.6 | 215.9 | 12 | 38.1 | 2 | 317.5 | 73 |
| 8 | 482.6 | 91.9 | 269.7 | 12 | 44.5 | 2 | 393.7 | 136 |
| 10 | 584.2 | 108 | 323.9 | 12 | 50.8 | 2-1/2 | 482.6 | 231 |
| 12 | 673.1 | 124 | 381 | 16 | 53.8 | 2-3/4 | 571.5 | 313 |
| 14 | 749.3 | 133.4 | 412.8 | 16 | 60.5 | 2-1/4 | 635 | 442 |
| 16 | 825.5 | 146.1 | 469.9 | 16 | 66.5 | 2-1/2 | 704.9 | 590 |
| 18 | 914.4 | 162.1 | 533.4 | 16 | 73.2 | 2-3/4 | 774.7 | 794 |
| 20 | 984.3 | 177.8 | 584.2 | 16 | 79.2 | 3 | 831.9 | 1009 |
| 24 | 1168.4 | 203.2 | 692.2 | 16 | 91.9 | 3-1/2 | 990.6 | 1644 |