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 Inch 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 | 0.84 | 1.50 | 0.62 |
| 3/4 | 1.05 | 1.50 | 0.75 |
| 1 | 1.32 | 1.50 | 0.88 |
| 1-1/4 | 1.66 | 1.88 | 1.00 |
| 1-1/2 | 1.90 | 2.25 | 1.12 |
| 2 | 2.38 | 3.00 | 1.38 |
| 2-1/2 | 2.88 | 3.75 | 1.75 |
| 3 | 3.50 | 4.50 | 2.00 |
| 3-1/2 | 4.00 | 5.25 | 2.25 |
| 4 | 4.50 | 6.00 | 2.50 |
| 5 | 5.56 | 7.50 | 3.12 |
| 6 | 6.62 | 9.00 | 3.75 |
| 8 | 8.62 | 12.00 | 5.00 |
| 10 | 10.75 | 15.00 | 6.25 |
| 12 | 12.75 | 18.00 | 7.50 |
| NPS | OD | A | B |
| 14 | 14.00 | 21.00 | 8.75 |
| 16 | 16.00 | 24.00 | 10.00 |
| 18 | 18.00 | 27.00 | 11.25 |
| 20 | 20.00 | 30.00 | 12.50 |
| 22 | 22.00 | 33.00 | 13.50 |
| 24 | 24.00 | 36.00 | 15.00 |
| 26 | 26.00 | 39.00 | 16.00 |
| 28 | 28.00 | 42.00 | 17.25 |
| 30 | 30.00 | 45.00 | 18.50 |
| 32 | 32.00 | 48.00 | 19.75 |
| 34 | 34.00 | 51.00 | 21.00 |
| 36 | 36.00 | 54.00 | 22.25 |
| 38 | 38.00 | 57.00 | 23.62 |
| 40 | 40.00 | 60.00 | 24.88 |
| 42 | 42.00 | 63.00 | 26.00 |
| NPS | OD | A | B |
| 44 | 44.00 | 66.00 | 27.38 |
| 46 | 46.00 | 69.00 | 28.62 |
| 48 | 48.00 | 72.00 | 29.88 |
