Butt Weld 90 Degree and 45 Degree elbows are generally used in big bore piping networks from size 2″ and above, though these fittings are available from size 1/2″ and above in ASME B16.9 : Factory-Made Wrought Buttwelding Fittings. This page provided Metric Dimensions for these fittings.
Available Dimensions are : OD | Outside Diameter at the Bevel, A | Center to End Dimension for 90 Degree Elbow, B | Center to End Dimension for 45 Degree Elbow.
| NPS | OD | A | B |
|---|---|---|---|
| 1/2 | 21.3 | 38 | 16 |
| 3/4 | 26.7 | 38 | 19 |
| 1 | 33.4 | 38 | 22 |
| 1-1/4 | 42.2 | 48 | 25 |
| 1-1/2 | 48.3 | 57 | 29 |
| 2 | 60.3 | 76 | 35 |
| 2-1/2 | 73.0 | 95 | 44 |
| 3 | 88.9 | 114 | 51 |
| 3-1/2 | 101.6 | 133 | 57 |
| 4 | 114.3 | 152 | 64 |
| 5 | 141.3 | 190 | 79 |
| 6 | 168.3 | 229 | 95 |
| 8 | 219.1 | 305 | 127 |
| 10 | 273.0 | 381 | 159 |
| 12 | 323.8 | 457 | 190 |
| 14 | 355.6 | 533 | 222 |
| 16 | 406.4 | 610 | 254 |
| 18 | 457.0 | 686 | 286 |
| 20 | 508.0 | 762 | 318 |
| 22 | 559.0 | 838 | 343 |
| 24 | 610.0 | 914 | 381 |
| 26 | 660.0 | 991 | 406 |
| 28 | 711.0 | 1067 | 438 |
| 30 | 762.0 | 1143 | 470 |
| 32 | 813.0 | 1219 | 502 |
| 34 | 864.0 | 1295 | 533 |
| 36 | 914.0 | 1372 | 565 |
| 38 | 965.0 | 1448 | 600 |
| 40 | 1016.0 | 1524 | 632 |
| 42 | 1067.0 | 1600 | 660 |
| 44 | 1118.0 | 1676 | 695 |
| 46 | 1168.0 | 1753 | 727 |
| 48 | 1219.0 | 1829 | 759 |
