ANSI B16.5 Class 2500 Lap Joint Flanges
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- All dimensions are in inches
(Size Chart)
| Nominal Pipe Size | Outside Diameter (O) | Bolt Circle (W) | Radius (r) | Number of Holes | Diameter of Holes | Hub Diameter (X) | Bore (B) | Thickness (T) | Length Thru Hub (Y) | Approximate Weight (lbs) |
|---|---|---|---|---|---|---|---|---|---|---|
| 1/2 | 5.25 | 3.50 | 0.12 | 4 | 0.88 | 1.69 | 0.90 | 1.19 | 1.56 | 7 |
| 3/4 | 5.50 | 3.75 | 0.12 | 4 | 0.88 | 2.00 | 1.11 | 1.25 | 1.69 | 8 |
| 1 | 6.25 | 4.25 | 0.12 | 4 | 1.00 | 2.25 | 1.38 | 1.38 | 1.88 | 11 |
| 1 1/4 | 7.25 | 5.12 | 0.19 | 4 | 1.13 | 2.88 | 1.72 | 1.50 | 2.06 | 16 |
| 1 1/2 | 8.00 | 5.75 | 0.25 | 4 | 1.25 | 3.12 | 1.97 | 1.75 | 2.38 | 22 |
| 2 | 9.25 | 6.75 | 0.31 | 8 | 1.13 | 3.75 | 2.46 | 2.00 | 2.75 | 37 |
| 2 1/2 | 10.50 | 7.75 | 0.31 | 8 | 1.25 | 4.50 | 2.97 | 2.25 | 3.12 | 53 |
| 3 | 12.00 | 9.00 | 0.38 | 8 | 1.38 | 5.25 | 3.60 | 2.62 | 3.62 | 80 |
| 4 | 14.00 | 10.75 | 0.44 | 8 | 1.63 | 6.50 | 4.60 | 3.00 | 4.25 | 120 |
| 5 | 16.50 | 12.75 | 0.44 | 8 | 1.88 | 8.00 | 5.69 | 3.62 | 5.12 | 205 |
| 6 | 19.00 | 14.50 | 0.50 | 8 | 2.13 | 9.25 | 6.75 | 4.25 | 6.00 | 315 |
| 8 | 21.75 | 17.25 | 0.50 | 12 | 2.13 | 12.00 | 8.75 | 5.00 | 7.00 | 470 |
| 10 | 26.50 | 21.25 | 0.50 | 12 | 2.63 | 14.75 | 10.92 | 6.50 | 9.00 | 900 |
| 12 | 30.00 | 24.38 | 0.50 | 12 | 2.88 | 17.38 | 12.92 | 7.25 | 10.00 | 1100 |