Lap Joint Flange
ASME/ANSI B16.5 Class 900 Lap Joint Flanges/Loose Flanges
SPECIFICATIONS
▪ All dimensions are in inches
| Nominal Pipe Size |
Outside Diameter |
Thickness | Length Thru Hub |
Hub Diameter |
Radius | Bore | Approximate Weight |
Bolt Circle | Number of Holes |
Diameter of Holes |
| (O) | (T) | (Y) | (X) | (r) | (B) | (lbs) | (C) | |||
| 1/2 | 4.75 | 0.88 | 1.38 | 1.25 | 0.13 | 1.50 | 0.9 | 4.00 | 3.25 | 4.00 |
| 3/4 | 5.13 | 1.00 | 1.69 | 1.38 | 0.13 | 1.75 | 1.11 | 5.00 | 3.5 | 4.00 |
| 1 | 5.88 | 1.13 | 2.00 | 1.63 | 0.13 | 2.06 | 1.38 | 8.00 | 4 | 4.00 |
| 1 1/4 | 6.25 | 1.13 | 2.50 | 1.63 | 0.19 | 2.50 | 1.72 | 9.00 | 4.38 | 4.00 |
| 1 1/2 | 7.00 | 1.25 | 2.88 | 1.75 | 0.25 | 2.75 | 1.97 | 12.00 | 4.88 | 4.00 |
| 2 | 8.50 | 1.50 | 3.63 | 2.25 | 0.31 | 4.13 | 2.46 | 25.00 | 6.5 | 8.00 |
| 2 1/2 | 9.63 | 1.63 | 4.13 | 2.50 | 0.31 | 4.88 | 2.97 | 35.00 | 7.5 | 8.00 |
| 3 | 9.50 | 1.50 | 2.13 | 5.00 | 0.38 | 3.60 | 25 | 7.50 | 8 | 1.00 |
| 4 | 11.50 | 1.75 | 2.75 | 6.25 | 0.44 | 4.60 | 51 | 9.25 | 8 | 1.25 |
| 5 | 13.75 | 2.00 | 3.13 | 7.50 | 0.50 | 5.69 | 81 | 11.00 | 8 | 1.38 |
| 6 | 15.00 | 2.19 | 3.38 | 9.25 | 0.50 | 6.75 | 105 | 12.50 | 12 | 1.25 |
| 8 | 18.50 | 2.50 | 4.50 | 11.75 | 0.50 | 8.75 | 190 | 15.50 | 12 | 1.50 |
| 10 | 21.50 | 2.75 | 5.00 | 14.50 | 0.50 | 10.92 | 275 | 18.50 | 16 | 1.50 |
| 12 | 24.00 | 3.13 | 5.63 | 16.50 | 0.50 | 12.92 | 370 | 21.00 | 20 | 1.50 |
| 14 | 25.25 | 3.38 | 6.13 | 17.75 | 0.50 | 14.18 | 415 | 22.00 | 20 | 1.63 |
| 16 | 27.75 | 3.50 | 6.50 | 20.00 | 0.50 | 16.19 | 465 | 24.25 | 20 | 1.75 |
| 18 | 31.00 | 4.00 | 7.50 | 22.25 | 0.50 | 18.20 | 650 | 27.00 | 20 | 2.00 |
| 20 | 33.75 | 4.25 | 8.25 | 24.50 | 0.50 | 20.25 | 810 | 29.50 | 20 | 2.13 |
| 24 | 41.00 | 5.50 | 10.50 | 29.50 | 0.50 | 24.25 | 1550 | 35.50 | 20 | 2.63 |