ASME B16.28 - Short Radius Fittings
1D Elbows & Returns - Dimensions (mm)
Column Legend
NPS = Nominal Pipe Size (inch) DN = Diameter Nominal (mm) OD = Outside Diameter A = Center to End (90 deg elbow) O = Back to Back (180 deg return) SR = Short Radius (R = 1xD)
All dimensions in mm per ASME B16.28 - Wrought steel short radius elbows and returns
90 Degree Short Radius Elbows (1D)
| NPS | DN | OD (mm) | A (C-E) |
|---|---|---|---|
| 1/2 | 15 | 21.3 | 25 |
| 3/4 | 20 | 26.7 | 32 |
| 1 | 25 | 33.4 | 38 |
| 1-1/4 | 32 | 42.2 | 44 |
| 1-1/2 | 40 | 48.3 | 51 |
| 2 | 50 | 60.3 | 64 |
| 2-1/2 | 65 | 73 | 76 |
| 3 | 80 | 88.9 | 89 |
| 3-1/2 | 90 | 101.6 | 102 |
| 4 | 100 | 114.3 | 114 |
| 5 | 125 | 141.3 | 140 |
| 6 | 150 | 168.3 | 168 |
| 8 | 200 | 219.1 | 219 |
| 10 | 250 | 273 | 273 |
| 12 | 300 | 323.8 | 324 |
| 14 | 350 | 355.6 | 356 |
| 16 | 400 | 406.4 | 406 |
| 18 | 450 | 457.2 | 457 |
| 20 | 500 | 508 | 508 |
| 24 | 600 | 609.6 | 610 |
180 Degree Short Radius Returns
| NPS | DN | OD (mm) | O (B-B) |
|---|---|---|---|
| 1/2 | 15 | 21.3 | 51 |
| 3/4 | 20 | 26.7 | 64 |
| 1 | 25 | 33.4 | 76 |
| 1-1/4 | 32 | 42.2 | 89 |
| 1-1/2 | 40 | 48.3 | 102 |
| 2 | 50 | 60.3 | 127 |
| 2-1/2 | 65 | 73 | 152 |
| 3 | 80 | 88.9 | 178 |
| 4 | 100 | 114.3 | 229 |
| 5 | 125 | 141.3 | 279 |
| 6 | 150 | 168.3 | 330 |
| 8 | 200 | 219.1 | 432 |