Size for Butt-Welding Elbows and Returns
GB 12459、GB/T 13401、SH 3408、SH3409、HG/T 21635、HG/T 21631、SY/T 0510、ASME B16.9、ASME B16.28
| Nominal Pipe Size | Center to End | Center to Center | Back to Faces | |||||
| 45°Elbow | 90°Elbow | 180°Return | ||||||
| H | F | P | K | |||||
| DN | NPS | LR | LR | SR | LR | SR | LR | SR |
| 15 20 25 |
1/2 3/4 1 |
16 19 22 |
38 38 38 |
-- -- 25 |
76 76 76 |
-- -- 51 |
48 51 56 |
-- -- 41 |
| 32 40 50 |
11/4 11/2 2 |
25 29 35 |
48 57 76 |
32 38 51 |
95 114 152 |
64 76 102 |
70 83 106 |
52 62 81 |
| 65 80 90 |
21/2 3 31/2 |
44 51 57 |
95 114 133 |
64 76 89 |
190 229 267 |
127 152 178 |
132 159 184 |
100 121 140 |
| 100 125 150 |
4 5 6 |
64 79 95 |
152 190 229 |
102 127 152 |
305 381 457 |
203 254 305 |
210 262 313 |
159 197 237 |
| 200 250 300 |
8 10 12 |
127 159 190 |
305 381 457 |
203 254 305 |
610 762 914 |
406 508 610 |
414 518 619 |
313 391 497 |
| 350 400 450 |
14 16 18 |
222 254 286 |
533 610 686 |
356 406 457 |
1067 1219 1372 |
711 813 914 |
711 813 914 |
533 610 686 |
| 500 550 600 |
20 22 24 |
318 343 381 |
762 838 914 |
508 559 610 |
1524 1676 1829 |
1016 1118 1219 |
1016 1118 1219 |
762 838 914 |
| 650 700 750 |
26 28 30 |
405 438 470 |
991 1067 1143 |
660 711 762 |
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