ANSI B16.5 Class 150 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 | 3.50 | 2.38 | 0.12 | 4 | 0.62 | 1.19 | 0.90 | 0.44 | 0.62 | 1 |
| 3/4 | 3.88 | 2.75 | 0.12 | 4 | 0.62 | 1.50 | 1.11 | 0.50 | 0.62 | 2 |
| 1 | 4.25 | 3.12 | 0.12 | 4 | 0.62 | 1.94 | 1.36 | 0.56 | 0.69 | 2 |
| 1 1/4 | 4.62 | 3.50 | 0.19 | 4 | 0.62 | 2.31 | 1.70 | 0.62 | 0.81 | 3 |
| 1 1/2 | 5.00 | 3.88 | 0.25 | 4 | 0.62 | 2.56 | 1.95 | 0.69 | 0.88 | 3 |
| 2 | 6.00 | 4.75 | 0.31 | 4 | 0.75 | 3.06 | 2.44 | 0.75 | 1.00 | 5 |
| 2 1/2 | 7.00 | 5.50 | 0.31 | 4 | 0.75 | 3.56 | 2.97 | 0.88 | 1.12 | 7 |
| 3 | 7.50 | 6.00 | 0.38 | 4 | 0.75 | 4.25 | 3.60 | 0.94 | 1.19 | 8 |
| 3 1/2 | 8.50 | 7.00 | 0.38 | 8 | 0.75 | 4.81 | 4.10 | 0.94 | 1.25 | 11 |
| 4 | 9.00 | 7.50 | 0.44 | 8 | 0.75 | 5.31 | 4.60 | 0.94 | 1.31 | 13 |
| 5 | 10.00 | 8.50 | 0.44 | 8 | 0.88 | 6.44 | 5.69 | 0.94 | 1.44 | 15 |
| 6 | 11.00 | 9.50 | 0.50 | 8 | 0.88 | 7.56 | 6.75 | 1.00 | 1.56 | 19 |
| 8 | 13.50 | 11.75 | 0.50 | 8 | 0.88 | 9.69 | 8.75 | 1.12 | 1.75 | 30 |
| 10 | 16.00 | 14.25 | 0.50 | 12 | 1.00 | 12.00 | 10.92 | 1.19 | 1.94 | 43 |
| 12 | 19.00 | 17.00 | 0.50 | 12 | 1.00 | 14.38 | 12.92 | 1.25 | 2.19 | 64 |
| 14 | 21.00 | 18.75 | 0.50 | 12 | 1.12 | 15.75 | 14.18 | 1.38 | 3.12 | 105 |
| 16 | 23.50 | 21.25 | 0.50 | 16 | 1.12 | 18.00 | 16.19 | 1.44 | 3.44 | 140 |
| 18 | 25.00 | 22.75 | 0.50 | 16 | 1.25 | 19.88 | 18.20 | 1.56 | 3.81 | 160 |
| 20 | 27.50 | 25.00 | 0.50 | 20 | 1.25 | 22.00 | 20.25 | 1.69 | 4.06 | 195 |
| 22 | 29.50 | 27.25 | 0.50 | 20 | 1.38 | 24.00 | 22.25 | 1.81 | 4.25 | 245 |
| 24 | 32.00 | 29.50 | 0.50 | 20 | 1.38 | 26.12 | 24.25 | 1.88 | 4.38 | 275 |