Lap Joint – Long, Buttweld, ANSI, WCS (in)
- Dimensions per ANSI/ASME B16.9.
- T = Pipe wall and lap thickness.
- A lap joint is useful when the alignment of bolt holes is difficult, as when spools are to be attached to flanged nozzles of vessels.
| PipeSize (NPS) | M | N | PSTD | PXS | R | Approx.Weight STD | Approx.Weight XS |
|---|---|---|---|---|---|---|---|
| 1/2 | 3 | 1 3/8 | 0.109 | 0.147 | 1/8 | 0.3 | 0.4 |
| 3/4 | 3 | 1 11/16 | 0.113 | 0.154 | 1/8 | 0.4 | 0.5 |
| 1 | 4 | 2 | 0.133 | 0.179 | 1/8 | 0.7 | 0.9 |
| 1 1/4 | 4 | 2 1/2 | 0.140 | 0.191 | 3/16 | 1.0 | 1.2 |
| 1 1/2 | 4 | 2 7/8 | 0.145 | 0.200 | 1/4 | 1.1 | 1.5 |
| 2 | 6 | 3 5/8 | 0.154 | 0.218 | 5/16 | 2.2 | 3.1 |
| 2 1/2 | 6 | 4 1/8 | 0.203 | 0.276 | 5/16 | 3.5 | 4.6 |
| 3 | 6 | 5 | 0.216 | 0.300 | 3/8 | 4.7 | 6.3 |
| 3 1/2 | 6 | 5 1/2 | 0.226 | 0.318 | 3/8 | 5.6 | 7.7 |
| 4 | 6 | 6 3/16 | 0.237 | 0.337 | 7/16 | 6.8 | 9.3 |
| 5 | 8 | 7 5/16 | 0.258 | 0.375 | 7/16 | 11.8 | 16.7 |
| 6 | 8 | 8 1/2 | 0.280 | 0.432 | 1/2 | 15.3 | 23.0 |
| 8 | 8 | 10 5/8 | 0.322 | 0.500 | 1/2 | 23.0 | 35.0 |
| 10 | 10 | 12 3/4 | 0.365 | 0.500 | 1/2 | 40.0 | 53.0 |
| 12 | 10 | 15 | 0.375 | 0.500 | 1/2 | 49.0 | 64.0 |
| 14 | 12 | 16 1/4 | 0.375 | 0.500 | 1/2 | 63.0 | 84.0 |
| 16 | 12 | 18 1/2 | 0.375 | 0.500 | 1/2 | 73.0 | 97.0 |
| 18 | 12 | 21 | 0.375 | 0.500 | 1/2 | 85.0 | 112.0 |
| 20 | 12 | 23 | 0.375 | 0.500 | 1/2 | 94.0 | 126.0 |
| 22 | 12 | 25 1/4 | 0.375 | 0.500 | 1/2 | 99.0 | 133.0 |
| 24 | 12 | 27 1/4 | 0.375 | 0.500 | 1/2 | 116.0 | 152.0 |