Wrought Steel Butt welding Fittings (ASME)
Long and Short Radius Returns
ASME B16.9, B16.28
Nominal Pipe Size (NPS) | Outside | Center-to-Center | End-to-End | |||||||
Diameter | 180 Returns O | 180 Returns K | ||||||||
at Bevel | ||||||||||
OD | Long Radius | Short Radius | Long Radius | Short Radius | ||||||
IN | MM | IN | MM | IN | MM | IN | MM | IN | MM | |
½ | 0.84 | 21.3 | 3 | 76 | - | - | 1.88 | 48 | - | - |
¾ | 1.05 | 26.7 | 2.25 | 57 | - | - | 1.69 | 43 | - | - |
1 | 1.32 | 33.4 | 3 | 76 | 2 | 51 | 2.19 | 56 | 1.62 | 41 |
1¼ | 1.66 | 42.2 | 3.75 | 95 | 2.5 | 64 | 2.75 | 70 | 2.06 | 52 |
1½ | 1.9 | 48.3 | 4.5 | 114 | 3 | 76 | 3.25 | 83 | 2.44 | 62 |
2 | 2.38 | 60.3 | 6 | 152 | 4 | 102 | 4.19 | 106 | 3.19 | 81 |
2½ | 2.88 | 73.0 | 7.5 | 190 | 5 | 127 | 5.19 | 132 | 3.94 | 100 |
3 | 3.5 | 88.9 | 9 | 229 | 6 | 152 | 6.25 | 159 | 4.75 | 121 |
3½ | 4 | 101.6 | 10.5 | 267 | 7 | 178 | 7.25 | 184 | 5.5 | 140 |
4 | 4.5 | 114.3 | 12 | 305 | 8 | 203 | 8.25 | 210 | 6.25 | 159 |
5 | 5.56 | 141.3 | 15 | 381 | 10 | 254 | 10.31 | 262 | 7.75 | 197 |
6 | 6.62 | 168.3 | 18 | 457 | 12 | 305 | 12.31 | 313 | 9.31 | 237 |
8 | 8.62 | 219.1 | 24 | 610 | 16 | 406 | 16.31 | 414 | 12.31 | 313 |
10 | 10.75 | 273.0 | 30 | 762 | 20 | 508 | 20.38 | 518 | 15.38 | 391 |
12 | 12.75 | 323.8 | 36 | 914 | 24 | 610 | 24.38 | 619 | 18.38 | 467 |
14 | 14 | 355.6 | 42 | 1067 | 28 | 711 | 28 | 711 | 21 | 533 |
16 | 16 | 406.4 | 48 | 1219 | 32 | 813 | 32 | 813 | 24 | 610 |
18 | 18 | 457 | 54 | 1372 | 36 | 914 | 36 | 914 | 27 | 686 |
20 | 20 | 508 | 60 | 1524 | 40 | 1016 | 40 | 1016 | 30 | 762 |
22 | 22 | 559 | 66 | 1676 | 44 | 1118 | 44 | 1118 | 33 | 838 |
24 | 24 | 610 | 72 | 1829 | 48 | 1219 | 48 | 1219 | 36 | 914 |