The bend is used to change the direction of run of pipe.it advantage is can matach long distance transition requirements,so it is commonly that bends dimension according to customer design.
Standards accord to:
ASME B16.9
ASME B16.28
ANSI/ASME B16.25
MSS SP-97
Pressure: SCH5 to SCH160
Bending radius(R): R=3D, 5D, 7D and 12D
Bending angle (θ):15°, 30°, 45°, 60°, 90°, 135°, 180°
Outer diamete(D): D≤1800mm
Wall thickness(T): T≤120mm
Straight Length (L): The length between two ends general from 300mm-1500mm
Example: Find the length of pipe required to make a 90 bend with a radius of 30"
Nominal pipe DN size | Outside Diameter at Bevel | Center to End | ||||
D1 | D2 | C | M | |||
Series A | Series B | Series A | Series B | |||
20×15 | 26.9 | 25 | 21.3 | 18 | 29 | 29 |
25×20 25×15 | 33.7 33.7 | 32 32 | 26.9 21.3 | 25 18 | 38 38 | 38 38 |
32×25 32×20 32×15 | 42.4 42.4 42.4 | 38 38 38 | 33.7 26.9 21.3 | 32 25 18 | 48 48 48 | 48 48 48 |
40×32 40×25 40×20 40×15 | 48.3 48.3 48.3 48.3 | 45 45 45 45 | 42.4 33.7 26.7 21.3 | 38 32 25 18 | 57 57 57 57 | 57 57 57 57 |
50×40 50×32 50×25 50×20 | 60.3 60.3 60.3 60.3 | 57 57 57 57 | 48.3 42.4 33.7 26.9 | 45 38 32 25 | 64 64 64 64 | 60 57 51 44 |
65×50 65×40 65×32 65×25 | 76.1(73) 76.1(73) 76.1(73) 76.1(73) | 76 76 76 76 | 60.3 48.3 42.4 33.7 | 57 45 38 32 | 76 76 76 76 | 70 67 64 57 |
80×65 80×50 80×40 80×32 | 88.9 88.9 88.9 88.9 | 89 89 89 89 | 76.1(73) 60.3 48.3 42.4 | 76 57 45 38 | 86 86 86 86 | 83 76 73 70 |
90×80 90×65 90×50 90×40 | 101.6 101.6 101.6 101.6 | - - - - | 88.9 76.1(73) 60.3 48.3 | - - - - | 95 95 95 95 | 92 89 83 79 |
100×90 100×80 100×65 100×50 100×40 | 114.3 114.3 114.3 114.3 114.3 | - 108 108 108 108 | 101.6 88.9 76.1(73) 60.3 48.3 | - 89 76 57 45 | 105 105 105 105 105 | 102 98 95 89 86 |
125×100 125×90 125×80 125×65 125×50 | 139.7 139.7 139.7 139.7 | 133 - 133 133 133 | 114.3 101.6 88.9 76.1(73) 60.3 | 108 - 89 76 57 | 124 124 124 124 124 | 117 114 111 108 105 |
150×125 150×100 150×90 150×80 150×65 | 168.3 168.3 168.3 168.3 168.3 | 159 159 - 159 159 | 139.7 114.3 101.6 88.9 76.1(73) | 133 108 - 89 76 | 143 143 143 143 143 | 137 130 127 124 121 |
200×150 200×125 200×100 200×90 | 219.1 219.1 219.1 219.1 | 219 219 219 - | 168.3 139.7 114.3 101.6 | 159 133 108 - | 178 178 178 178 | 168 162 156 152 |
200×200 200×150 200×125 200×100 | 273.0 273.0 273.0 273.0 | 273 273 273 273 | 219.1 168.3 139.7 114.3 | 219 159 133 108 | 216 216 216 216 | 208 194 191 184 |
300×250 300×200 300×150 | 323.9 323.9 323.9 | 325 325 325 | 273.0 219.1 168.3 | 273 219 159 | 254 254 254 | 241 229 219 |
300×125 | 323.9 | 325 | 139.7 | 133 | 254 | 216 |
350×300 350×250 350×200 350×150 | 355.6 355.6 355.6 355.6 | 377 377 377 377 | 323.9 273.0 219.1 168.3 | 325 273 219 159 | 279 279 279 279 | 270 257 248 238 |
400×350 400×300 400×250 400×200 400×150 | 406.4 406.4 406.4 406.4 406.4 | 426 426 426 426 426 | 355.6 323.9 273.0 219.1 168.3 | 377 325 273 219 159 | 305 305 305 305 305 | 305 295 283 273 264 |
450×400 450×350 450×300 450×250 450×200 | 457.2 457.2 457.2 457.2 457.2 | 478 478 478 478 478 | 406.4 355.6 323.9 273.0 219.1 | 426 377 325 273 219 | 343 343 343 343 343 | 330 330 321 308 298 |
500×450 500×100 500×350 500×300 500×250 500×200 | 508.0 508.0 508.0 508.0 508.0 508.0 | 529 529 529 529 529 529 | 457.2 406.4 355.6 323.9 273.0 219.1 | 478 426 377 325 273 219 | 381 381 381 381 381 381 | 368 356 356 346 333 324 |
550×500 550×450 550×400 | 559 559 559 | - - - | 508 457 406 | - - - | 419 419 419 | 406 394 381 |
600×550 600×550 600×450 | 610 610 610 | - 630 630 | 559 508 457 | - 530 480 | 432 432 432 | 432 432 419 |
650×600 650×550 650×500 | 660 660 660 | - - - | 610 559 508 | - - - | 495 495 495 | 483 470 457 |
700×650 700×600 700×550 | 711 711 711 | - 720 - | 660 610 559 | - 630 - | 521 521 521 | 521 508 495 |
750×700 750×650 750×600 | 762 762 762 | - - - | 711 660 610 | - - - | 559 559 559 | 546 546 533 |
800×750 800×700 800×650 | 813 813 813 | - 820 - | 762 711 660 | - 720 - | 597 597 597 | 584 572 572 |
850×800 850×750 850×700 | 864 864 864 | - - - | 813 762 711 | - - - | 635 635 635 | 622 610 597 |
900×850 900×800 900×750 | 914 914 914 | - 920 - | 864 813 762 | - 820 - | 673 673 673 | 660 648 635 |
950×900 950×850 950×800 | 965 965 965 | - - - | 914 864 813 | - - - | 711 711 711 | 711 698 686 |
1000×950 1000×900 1000×8500 | 1016 1016 1016 | - 1020 - | 965 914 864 | - 920 - | 749 749 749 | 749 737 724 |
1000×1000 1050×950 1050×900 | 1067 1067 1067 | - - - | 1016 965 914 | - - - | 762 762 762 | 711 711 711 |
1100×1050 1100×1000 1100×950 | 1118 1118 1118 | - 1120 - | 1067 1016 965 | - 1020 - | 813 813 813 | 762 749 737 |
1150×1100 1150×1050 1150×1000 | 1168 1168 1168 | - - - | 1118 1067 1016 | - - - | 851 851 851 | 800 787 775 |
1200×1150 1200×1100 1200×1050 | 1220 1220 1220 | - 1220 - | 1168 1118 1067 | - 1120 - | 889 889 889 | 838 838 813 |
Nominal pipe size | Outside Diameter at Bevel | Center to End | |||
D | C | M | |||
DN | INCH | Series A | Series B | ||
15 | 1/2 | 21.3 | 18 | 25 | |
20 | 3/4 | 26.9 | 25 | 29 | |
25 | 1 | 33.7 | 32 | 38 | |
32 | 11/4 | 42.4 | 38 | 48 | |
40 | 11/2 | 48.3 | 45 | 57 | |
50 | 2 | 60.3 | 57 | 64 | |
65 | 21/2 | 76.1(73) | 76 | 76 | |
80 | 3 | 88.9 | 89 | 86 | |
90 | 31/2 | 101.6 | ― | 95 | |
100 | 4 | 114.3 | 108 | 105 | |
125 | 5 | 139.7 | 133 | 124 | |
150 | 6 | 168.3 | 159 | 143 | |
200 | 8 | 219.1 | 219 | 178 | |
250 | 10 | 273.0 | 273 | 216 | |
300 | 12 | 323.9 | 325 | 254 | |
350 | 14 | 355.6 | 377 | 279 | |
400 | 16 | 406.4 | 426 | 305 | |
450 | 18 | 457.2 | 478 | 343 | |
500 | 20 | 508.0 | 529 | 381 | |
550 | 22 | 559 | ― | 419 | |
600 | 24 | 610 | 630 | 432 | |
650 | 26 | 660 | ― | 495 | |
700 | 28 | 711 | 720 | 521 | |
750 | 30 | 762 | ― | 559 | |
800 | 32 | 813 | 820 | 597 | |
850 | 34 | 864 | ― | 635 | |
900 | 36 | 914 | 920 | 673 | |
950 | 38 | 965 | ― | 711 | |
1000 | 40 | 1016 | 1020 | 749 | |
1050 | 42 | 1067 | ― | 762 | 711 |
1100 | 44 | 1118 | 1120 | 813 | 762 |
1150 | 46 | 1168 | ― | 851 | 800 |
1200 | 48 | 1220 | 1220 | 889 | 838 |
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