ASME B16.9 Butt Weld 180 Deg Lr Elbow
| NPS | D(outer dimension) | O(Center to Center) | K(Back to Face) |
| 1/2″ | 21.3 | 76 | 48 |
| 3/4″ | 26.7 | 76 | 51 |
| 1″ | 33.4 | 76 | 56 |
| 1 1/4″ | 42.2 | 95 | 70 |
| 1 1/2″ | 48.3 | 114 | 83 |
| 2″ | 60.3 | 152 | 106 |
| 2 1/2″ | 73 | 190 | 132 |
| 3″ | 88.9 | 229 | 159 |
| 3 1/2″ | 101.6 | 267 | 184 |
| 4″ | 114.3 | 305 | 210 |
| 5″ | 141.3 | 381 | 262 |
| 6″ | 168.3 | 457 | 313 |
| 8″ | 219.1 | 610 | 414 |
| 10″ | 273 | 762 | 518 |
| 12″ | 323.8 | 914 | 619 |
| 14″ | 355.6 | 1067 | 711 |
| 16″ | 406.4 | 1219 | 813 |
| 18″ | 457 | 1372 | 914 |
| 20″ | 508 | 1524 | 1016 |
| 22″ | 559 | 1676 | 1118 |
| 24″ | 610 | 1829 | 1219 |
