All dimensions are in "mm" unless noted otherwise.
Dimensions of Class 2500 RF Threaded Flanges as per ASME B16.5.
| Nominal Pipe Size |
Outside Dia of Flange (D) |
Thick of Flange (B) |
Dia of Raised Face (G) |
Dia of Hub at Base (A) |
Length thru Hub (H) |
Min Thread Length (T) |
Min Counter Bore (Q) |
No of Holes |
Dia of Holes (L) |
Dia of Bolts (inch) |
Dia of Bolt Circle (K) |
Approx Weight (kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/2 | 133.4 | 30.2 | 35.1 | 42.9 | 39.6 | 28.4 | 23.6 | 4 | 22.4 | 3/4 | 88.9 | 3 |
| 3/4 | 139.7 | 31.8 | 42.9 | 50.8 | 42.9 | 31.8 | 29 | 4 | 22.4 | 3/4 | 95.3 | 4 |
| 1 | 158.8 | 35.1 | 50.8 | 57.2 | 47.8 | 35.1 | 35.8 | 4 | 25.4 | 7/8 | 108 | 5 |
| 1-1/4 | 184.2 | 38.1 | 63.5 | 73.2 | 52.3 | 38.1 | 44.5 | 4 | 28.4 | 1 | 130 | 7 |
| 1-1/2 | 203.2 | 44.5 | 73.2 | 79.2 | 60.5 | 44.5 | 50.5 | 4 | 31.8 | 1-1/8 | 146.1 | 10 |
| 2 | 235 | 50.8 | 91.9 | 95.3 | 69.9 | 50.8 | 63.5 | 8 | 28.4 | 1 | 171.5 | 17 |
| 2-1/2 | 266.7 | 57.2 | 104.6 | 114.3 | 79.2 | 57.2 | 76.2 | 8 | 31.8 | 1-1/8 | 196.9 | 25 |