ASME B16.9 — Lap Joint Stub End Dimensions
ASME B16.9 Lap Joint Stub End Dimensions — 21 sizes.
| NPS | DN | OD — Barrel (mm) | F — Long pattern (mm) | F — Short pattern (mm) | G — Lap dia (mm) | R — Fillet radius (mm) |
|---|---|---|---|---|---|---|
| ½" | 15 | 21.3 | 76 | 51 | 35 | 3 |
| ¾" | 20 | 26.7 | 76 | 51 | 43 | 3 |
| 1" | 25 | 33.4 | 102 | 51 | 51 | 3 |
| 1¼" | 32 | 42.2 | 102 | 51 | 64 | 5 |
| 1½" | 40 | 48.3 | 102 | 51 | 73 | 6 |
| 2" | 50 | 60.3 | 152 | 64 | 92 | 8 |
| 2½" | 65 | 73 | 152 | 64 | 105 | 8 |
| 3" | 80 | 88.9 | 152 | 64 | 127 | 10 |
| 3½" | 90 | 101.6 | 152 | 76 | 140 | 10 |
| 4" | 100 | 114.3 | 152 | 76 | 157 | 11 |
| 5" | 125 | 141.3 | 203 | 76 | 186 | 11 |
| 6" | 150 | 168.3 | 203 | 89 | 216 | 13 |
| 8" | 200 | 219.1 | 203 | 102 | 270 | 13 |
| 10" | 250 | 273 | 254 | 127 | 324 | 13 |
| 12" | 300 | 323.8 | 254 | 152 | 381 | 13 |
| 14" | 350 | 355.6 | 305 | 152 | 413 | 13 |
| 16" | 400 | 406.4 | 305 | 152 | 470 | 13 |
| 18" | 450 | 457 | 305 | 152 | 533 | 13 |
| 20" | 500 | 508 | 305 | 152 | 584 | 13 |
| 22" | 550 | 559 | 305 | 152 | 641 | 13 |
| 24" | 600 | 610 | 305 | 152 | 692 | 13 |
- Dimensions are in millimetres unless stated otherwise.
- The lap diameter G matches the raised-face diameter of an ASME B16.5 flange of the same size.
- Lap thickness is not less than the nominal pipe wall thickness.