ANSI B16.5 Class 900 Slip-On Flanges
900 CLASS
| NPS | Outside Diameter (O) | Thickness (T) | Hub Diameter (X) | Length Through Hub (Y) | Bore (B) | Diameter of Bolt Circle (C) | Diameter of Bolt Holes (in) | Number of Bolts |
|---|---|---|---|---|---|---|---|---|
| 1/2 | 121 | 22.4 | 38 | 32 | 22.9 | 82.6 | 7/8 | 4 |
| 3/4 | 130 | 25.4 | 44 | 35 | 28.2 | 88.9 | 7/8 | 4 |
| 1 | 149 | 28.4 | 52 | 41 | 35.4 | 101.6 | 1 | 4 |
| 1 1/4 | 159 | 28.4 | 64 | 41 | 43.7 | 111.1 | 1 | 4 |
| 1 1/2 | 178 | 31.8 | 70 | 44 | 50 | 124 | 1 1/8 | 4 |
| 2 | 216 | 38.1 | 105 | 57 | 62.5 | 165.1 | 1 | 8 |
| 2 1/2 | 244 | 41.1 | 124 | 64 | 75.4 | 190.5 | 1 1/8 | 8 |
| 3 | 241 | 38.1 | 127 | 54 | 91.4 | 190.5 | 1 | 8 |
| 4 | 292 | 44.5 | 159 | 70 | 116.8 | 235 | 1 1/4 | 8 |
| 5 | 349 | 50.8 | 190 | 79 | 144.5 | 279.4 | 1 3/8 | 8 |
| 6 | 381 | 55.6 | 235 | 86 | 171.4 | 317.5 | 1 1/4 | 12 |
| 8 | 470 | 63.5 | 298 | 102 | 222.2 | 393.7 | 1 1/2 | 12 |
| 10 | 546 | 69.8 | 368 | 108 | 277.4 | 469.9 | 1 1/2 | 16 |
| 12 | 610 | 79.2 | 419 | 117 | 328.2 | 533.4 | 1 1/2 | 20 |
| 14 | 641 | 85.9 | 451 | 130 | 360.2 | 558.8 | 1 5/8 | 20 |
| 16 | 705 | 88.9 | 508 | 133 | 411.2 | 616 | 1 3/4 | 20 |
| 18 | 787 | 101.6 | 565 | 152 | 462.3 | 685.8 | 2 | 20 |
| 20 | 857 | 108 | 622 | 159 | 514.4 | 749.3 | 2 1/8" | 20 |
| 24 | 1041 | 139.7 | 749 | 203 | 616 | 901.7 | 2 5/8" | 20 |
| Nominal Pipe Size | Outside Diameter (O) | Thickness (T) | Raised Face Diameter (R) | Length Thru Hub (Y) | Hub Diameter (X) | Bore (B) | Approximate Weight | Bolt Circle (C) | Number of Holes | Diameter of Holes |
|---|---|---|---|---|---|---|---|---|---|---|
| 1/2 | 4.75 mm | 0.88 mm | 1.38 mm | 1.25 mm | 1.50 mm | 0.88 mm | 4 lb | 3.25 mm | 4 | 0.88 mm |
| 3/4 | 5.13 mm | 1.00 mm | 1.69 mm | 1.38 mm | 1.75 mm | 1.09 mm | 5 lb | 3.50 mm | 4 | 0.88 mm |
| 1 | 5.88 mm | 1.13 mm | 2.00 mm | 1.63 mm | 2.06 mm | 1.36 mm | 8 lb | 4.00 mm | 4 | 1.00 mm |
| 1 1/4 | 6.25 mm | 1.13 mm | 2.50 mm | 1.63 mm | 2.50 mm | 1.70 mm | 9 lb | 4.38 mm | 4 | 1.00 mm |
| 1 1/2 | 7.00 mm | 1.25 mm | 2.88 mm | 1.75 mm | 2.75 mm | 1.95 mm | 12 lb | 4.88 mm | 4 | 1.13 mm |
| 2 | 8.50 mm | 1.50 mm | 3.63 mm | 2.25 mm | 4.13 mm | 2.44 mm | 25 lb | 6.50 mm | 8 | 1.00 mm |
| 2 1/2 | 9.63 mm | 1.63 mm | 4.13 mm | 2.50 mm | 4.88 mm | 2.94 mm | 36 lb | 7.50 mm | 8 | 1.13 mm |
| 3 | 9.50 mm | 1.50 mm | 5.00 mm | 2.13 mm | 5.00 mm | 3.57 mm | 26 lb | 7.50 mm | 8 | 1.00 mm |
| 4 | 11.50 mm | 1.75 mm | 6.19 mm | 2.75 mm | 6.25 mm | 4.57 mm | 53 lb | 9.25 mm | 8 | 1.25 mm |
| 5 | 13.75 mm | 2.00 mm | 7.31 mm | 3.13 mm | 7.50 mm | 5.66 mm | 83 lb | 11.00 mm | 8 | 1.38 mm |
| 6 | 15.00 mm | 2.19 mm | 8.50 mm | 3.38 mm | 9.25 mm | 6.72 mm | 110 lb | 12.50 mm | 12 | 1.25 mm |
| 8 | 18.50 mm | 2.50 mm | 10.63 mm | 4.00 mm | 11.75 mm | 8.72 mm | 170 lb | 15.50 mm | 12 | 1.50 mm |
| 10 | 21.50 mm | 2.75 mm | 12.75 mm | 4.25 mm | 14.50 mm | 10.88 mm | 245 lb | 18.50 mm | 16 | 1.50 mm |
| 12 | 24.00 mm | 3.13 mm | 15.00 mm | 4.63 mm | 16.50 mm | 12.88 mm | 325 lb | 21.00 mm | 20 | 1.50 mm |
| 14 | 25.25 mm | 3.38 mm | 16.25 mm | 5.13 mm | 17.75 mm | 14.14 mm | 400 lb | 22.00 mm | 20 | 1.63 mm |
| 16 | 27.75 mm | 3.50 mm | 18.50 mm | 5.25 mm | 20.00 mm | 16.16 mm | 425 lb | 24.25 mm | 20 | 1.75 mm |
| 18 | 31.00 mm | 4.00 mm | 21.00 mm | 6.00 mm | 22.25 mm | 18.18 mm | 600 lb | 27.00 mm | 20 | 2.00 mm |
| 20 | 33.75 mm | 4.25 mm | 23.00 mm | 6.25 mm | 24.50 mm | 20.20 mm | 730 lb | 29.50 mm | 20 | 2.13 mm |
| 24 | 41.00 mm | 5.50 mm | 27.25 mm | 8.00 mm | 29.50 mm | 24.25 mm | 1400 lb | 35.50 mm | 20 | 2.63 mm |