ASME B16.9 long-radius and 3D elbow table: center-to-end distance by nominal size.
| NPS (in) | Outside diameter (mm) | 90° long radius A (mm) | 45° long radius B (mm) | 90° 3D A (mm) |
|---|---|---|---|---|
| 1/2 | 21.3 | 38 | 16 | — |
| 3/4 | 26.7 | 38 | 19 | 57 |
| 1 | 33.4 | 38 ✓ | 22 | 76 ✓ |
| 1-1/4 | 42.2 | 48 ✓ | 25 | 95 ✓ |
| 1-1/2 | 48.3 | 57 ✓ | 29 | 114 ✓ |
| 2 | 60.3 | 76 ✓ | 35 | 152 ✓ |
| 2-1/2 | 73 | 95 ✓ | 44 | 190 ✓ |
| 3 | 88.9 | 114 ✓ | 51 | 229 ✓ |
| 3-1/2 | 101.6 | 133 ✓ | 57 | 267 ✓ |
| 4 | 114.3 | 152 ✓ | 64 | 305 ✓ |
| 5 | 141.3 | 190 ✓ | 79 | 381 ✓ |
| 6 | 168.3 | 229 ✓ | 95 | 457 ✓ |
| 8 | 219.1 | 305 ✓ | 127 | 610 ✓ |
| 10 | 273 | 381 ✓ | 159 | 762 ✓ |
| 12 | 323.8 | 457 ✓ | 190 | 914 ✓ |
| 14 | 355.6 | 533 ✓ | 222 | 1067 ✓ |
| 16 | 406.4 | 610 ✓ | 254 | 1219 ✓ |
| 18 | 457 | 686 ✓ | 286 | 1372 ✓ |
| 20 | 508 | 762 ✓ | 318 | 1524 ✓ |
| 22 | 559 | 838 ✓ | 343 | 1676 ✓ |
| 24 | 610 | 914 ✓ | 381 | 1829 ✓ |
| 26 | 660 | 991 ✓ | 406 | 1981 ✓ |
| 28 | 711 | 1067 ✓ | 438 | 2134 ✓ |
| 30 | 762 | 1143 ✓ | 470 | 2286 ✓ |
| 32 | 813 | 1219 ✓ | 502 | 2438 ✓ |
| 34 | 864 | 1295 ✓ | 533 | 2591 ✓ |
| 36 | 914 | 1372 ✓ | 565 | 2743 ✓ |
| 38 | 965 | 1448 ✓ | 600 | 2896 ✓ |
| 40 | 1016 | 1524 ✓ | 632 | 3048 ✓ |
| 42 | 1067 | 1600 ✓ | 660 | 3200 ✓ |
| 44 | 1118 | 1676 ✓ | 695 | 3353 ✓ |
| 46 | 1168 | 1753 ✓ | 727 | 3505 ✓ |
| 48 | 1219 | 1829 ✓ | 759 | 3658 ✓ |
✓ = follows the standard's rule: long radius A = 1.5 × NPS and 3D = 3 × NPS (in inches). Sizes below 1″ and the 45° values come from MyCustomPiping only. Short-radius elbows are not published: the source gave the outside diameter instead of A = NPS.
Source: MyCustomPiping (RamDj12049), CSV databases of the FreeCAD addon, LGPL-2.1; dimensions per ASME B16.5, B16.9 and B36.10M. ↗
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