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Home > Seamless Steel Pipe Introduction > Dimensions > ASME B16.9, B16.28 > Concentric & Eccentric Reducers
Long and Short Radius Elbows Long and Short Radius Returns Straight Tees and Caps Concentric & Eccentric Reducers

Wrought Steel Buttwelding Fittings (ASME)
Reducing Tees and Concentric & Eccentric Reducers

ASME B16.9

ASME B16.9 *CangZhou Ritia Standards
Nominal Outside Diameter at Bevel Center-to-End End-to-End
Pipe Size OD1 OD2 C M H
(NPS) IN MM IN MM IN MM IN MM IN MM
¾×½ 1.05 26.7 0.84 21.3 1.12 29 1.12 29 1.5 38
1×¾ 1.32 33.4 1.05 26.7 1.5 38 1.5 38 2 51
1×½ 1.32 33.4 0.84 21.3 1.5 38 1.5 38 2 51
1¼×1 1.66 42.2 1.32 33.4 1.88 48 1.88 48 2 51
1¼×¾ 1.66 42.2 1.05 26.7 1.88 48 1.88 48 2 51
1¼×½ 1.66 42.2 0.84 21.3 1.88 48 1.88 48 2 51
1 ½×1¼ 1.9 48.3 1.66 42.2 2.25 57 2.25 57 2.5 64
1 ½×1 1.9 48.3 1.32 33.4 2.25 57 2.25 57 2.5 64
1 ½×¾ 1.9 48.3 1.05 26.7 2.25 57 2.25 57 2.5 64
1 ½×½ 1.9 48.3 0.84 21.3 2.25 57 2.25 57 2.5 64
2×1½ 2.38 60.3 1.9 48.3 2.5 64 2.38 60 3 76
2×1¼ 2.38 60.3 1.66 42.2 2.5 64 2.25 57 3 76
2×1 2.38 60.3 1.32 33.4 2.5 64 2 51 3 76
2×¾ 2.38 60.3 1.05 26.7 2.5 64 1.75 44 3 76
2×½ 2.38 60.3 0.84 21.3 2.5 64 * * 3 76
2 ½×2 2.88 73 2.38 60.3 3 76 2.75 70 3.5 89
2 ½×1½ 2.88 73 1.9 48.3 3 76 2.62 67 3.5 89
2 ½×1¼ 2.88 73 1.66 42.2 3 76 2.5 64 3.5 89
2 ½×1 2.88 73 1.32 33.4 3 76 2.25 57 3.5 89
2 ½×¾ 2.88 73 1.05 26.7 3 76 * * 3.5 89
2 ½×½ 2.88 73 0.84 21.3 3 76 * * 3.5 89
3×2½ 3.5 88.9 2.88 73 3.38 86 3.25 83 3.5 89
3×2 3.5 88.9 2.38 60.3 3.38 86 3 76 3.5 89
3×1½ 3.5 88.9 1.9 48.3 3.38 86 2.88 73 3.5 89
3×1¼ 3.5 88.9 1.66 42.2 3.38 86 2.75 70 3.5 89
3×1 3.5 88.9 1.32 33.4 3.38 86 * * 3.5 89
3×¾ 3.5 88.9 1.05 26.7 3.38 86 * * 3.5 89
3×½ 3.5 88.9 0.84 21.3 3.38 86 * * 3.5 89
3 ½×3 4 101.6 3.5 88.9 3.75 95 3.62 92 4 102
3 ½×2½ 4 101.6 2.88 73 3.75 95 3.5 89 4 102
3 ½×2 4 101.6 2.38 60.3 3.75 95 3.25 83 4 102
3 ½×1½ 4 101.6 1.9 48.3 3.75 95 3.12 79 4 102
3 ½×1¼ 4 101.6 1.66 42.2 3.75 95 * * 4 102
4×3½ 4.5 114.3 4 101.6 4.12 105 4 102 4 102
4×3 4.5 114.3 3.5 88.9 4.12 105 3.88 98 4 102
4×2½ 4.5 114.3 2.88 73 4.12 105 3.75 95 4 102
4×2 4.5 114.3 2.38 60.3 4.12 105 3.5 89 4 102
4×1½ 4.5 114.3 1.9 48.3 4.12 105 3.38 86 4 102
4×1¼ 4.5 114.3 1.66 42.2 4.12 105 * * 4 102
4×1 4.5 114.3 1.32 33.4 4.12 105 * * 4 102
5×4 5.56 141.3 4.5 114.3 4.88 124 4.62 117 5 127
5×3½ 5.56 141.3 4 101.6 4.88 124 4.5 114 5 127
5×3 5.56 141.3 3.5 88.9 4.88 124 4.38 111 5 127
5×2½ 5.56 141.3 2.88 73 4.88 124 4.25 108 5 127
5×2 5.56 141.3 2.38 60.3 4.88 124 4.12 105 5 127
5×1½ 5.56 141.3 1.9 48.3 4.88 124 * * 5 127
5×1¼ 5.56 141.3 1.66 42.2 4.88 124 * * 5 127
6×5 6.62 168.3 5.56 141.3 5.62 143 5.38 137 5.5 140
6×4 6.62 168.3 4.5 114.3 5.62 143 5.12 130 5.5 140
6×3½ 6.62 168.3 4 101.6 5.62 143 5 127 5.5 140
6×3 6.62 168.3 3.5 88.9 5.62 143 4.88 124 5.5 140
6×2½ 6.62 168.3 2.88 73 5.62 143 4.75 121 5.5 140
6×2 6.62 168.3 2.38 60.3 5.62 143 * * 5.5 140
8×6 8.62 219.1 6.62 168.3 7 178 6.62 168 6 152
8×5 8.62 219.1 5.56 141.3 7 178 6.38 162 6 152
8×4 8.62 219.1 4.5 114.3 7 178 6.12 156 6 152
8×3½ 8.62 219.1 4 101.6 7 178 6 152 6 152
8×3 8.62 219.1 3.5 88.9 7 178 * * 6 152
10×8 10.75 273 8.62 219.1 8.5 216 8 203 7 178
10×6 10.75 273 6.62 168.3 8.5 216 7.62 194 7 178
10×5 10.75 273 5.56 141.3 8.5 216 7.5 191 7 178
10×4 10.75 273 4.5 114.3 8.5 216 7.25 184 7 178
10×3 10.75 273 3.5 88.9 8.5 216 * * 7 178
12×10 12.75 323.8 10.75 273 10 254 9.5 241 8 203
12×8 12.75 323.8 8.62 219.1 10 254 9 229 8 203
12×6 12.75 323.8 6.62 168.3 10 254 8.62 219 8 203
12×5 12.75 323.8 5.56 141.3 10 254 8.5 216 8 203
12×4 12.75 323.8 4.5 114.3 10 254 * * 8 203
14×12 14 355.6 12.75 323.8 11 279 10.62 270 13 330
14×10 14 355.6 10.75 273 11 279 10.12 257 13 330
14×8 14 355.6 8.62 219.1 11 279 9.75 248 13 330
14×6 14 355.6 6.62 168.3 11 279 9.38 238 13 330
14×5 14 355.6 5.56 141.3 11 279 * * 13 330
16×14 16 406.4 14 355.6 12 305 12 305 14 356
16×12 16 406.4 12.75 323.8 12 305 11.62 295 14 356
16×10 16 406.4 10.75 273 12 305 11.12 283 14 356
16×8 16 406.4 8.62 219.1 12 305 10.75 273 14 356
16×6 16 406.4 6.62 168.3 12 305 10.38 264 14 356
18×16 18 457 16 406.4 13.5 343 13 330 15 381
18×14 18 457 14 355.6 13.5 343 13 330 15 381
18×12 18 457 12.75 323.8 13.5 343 12.62 321 15 381
18×10 18 457 10.75 273 13.5 343 12.12 308 15 381
18×8 18 457 8.62 219.1 13.5 343 11.75 298 15 381
20×18 20 508 18 457.2 15 381 14.5 368 20 508
20×16 20 508 16 406.4 15 381 14 356 20 508
20×14 20 508 14 355.6 15 381 14 356 20 508
20×12 20 508 12.75 323.8 15 381 13.62 346 20 508
20×10 20 508 10.75 273 15 381 13.12 333 20 508
20×8 20 508 8.62 219.1 15 381 12.75 324 20 508
22×20 22 559 20 508 16.5 419 16 406 20 508
22×18 22 559 18 457.2 16.5 419 15.5 394 20 508
22×16 22 559 16 406.4 16.5 419 15 381 20 508
22×14 22 559 14 355.6 16.5 419 15 381 20 508
22×12 22 559 12.75 323.8 16.5 419 14.62 371 20 508
22×10 22 559 10.75 273 16.5 419 14.12 359 20 508
24×22 24 610 22 558.8 17 432 17 432 20 508
24×20 24 610 20 508 17 432 17 432 20 508
24×18 24 610 18 457.2 17 432 16.5 419 20 508
24×16 24 610 16 406.4 17 432 16 406 20 508
24×14 24 610 14 355.6 17 432 16 406 20 508
24×12 24 610 12.75 323.8 17 432 15.62 397 20 508
24×10 24 610 10.75 273 17 432 15.12 384 20 508
26×24 26 660 24 609.6 19.5 495 19 483 24 610
26×22 26 660 22 558.8 19.5 495 18.5 470 24 610
26×20 26 660 20 508 19.5 495 18 457 24 610
26×18 26 660 18 457.2 19.5 495 17.5 444 24 610
26×16 26 660 16 406.4 19.5 495 17 432 24 610
26×14 26 660 14 355.6 19.5 495 17 432 24 610
26×12 26 660 12.75 323.8 19.5 495 16.62 422 24 610
28×26 28 711 26 660.4 20.5 521 20.5 521 24 610
28×24 28 711 24 609.6 20.5 521 20 508 24 610
28×22 28 711 22 558.8 20.5 521 19.5 495 24 610
28×20 28 711 20 508 20.5 521 19 483 24 610
28×18 28 711 18 457.2 20.5 521 18.5 470 24 610
28×16 28 711 16 406.4 20.5 521 18 457 24 610
28×14 28 711 14 355.6 20.5 521 18 457 24 610
28×12 28 711 12.75 323.8 20.5 521 17.62 448 24 610
30×28 30 762 28 711.2 22 559 21.5 546 24 610
30×26 30 762 26 660.4 22 559 21.5 546 24 610
30×24 30 762 24 609.6 22 559 21 533 24 610
30×22 30 762 22 558.8 　 559 20.5 521 24 610
30×20 30 762 20 508 22 559 20 508 24 610
30×18 30 762 18 457.2 22 559 19.5 495 24 610
30×16 30 762 16 406.4 22 559 19 483 24 610
30×14 30 762 14 355.6 22 559 19 483 24 610
30×12 30 762 12.75 323.8 22 559 18.62 473 24 610
30×10 30 762 10.75 273 22 559 18.12 460 24 610
32×30 32 813 30 762 23.5 597 23 584 24 610
32×28 32 813 28 711.2 23.5 597 22.5 572 24 610
32×26 32 813 26 660.4 23.5 597 22.5 572 24 610
32×24 32 813 24 609.6 23.5 597 22 559 24 610
32×22 32 813 22 558.8 23.5 597 21.5 546 24 610
32×20 32 813 20 508 23.5 597 21 533 24 610
32×18 32 813 18 457.2 23.5 597 20.5 521 24 610
32×16 32 813 16 406.4 23.5 597 20 508 24 610
32×14 32 813 14 355.6 23.5 597 20 508 24 610
34×32 34 864 32 812.8 25 635 24.5 622 24 610
34×30 34 864 30 762 25 635 24 610 24 610
34×28 34 864 28 711.2 25 635 23.5 597 24 610
34×26 34 864 26 660.4 25 635 23.5 597 24 610
34×24 34 864 24 609.6 25 635 23 584 24 610
34×22 34 864 22 558.8 25 635 22.5 572 24 610
34×20 34 864 20 508 25 635 22 559 24 610
34×18 34 864 18 457.2 25 635 21.5 546 24 610
34×16 34 864 16 406.4 25 635 21 533 24 610
36×34 36 914 34 863.6 26.5 673 26 660 24 610
36×32 36 914 32 812.8 26.5 673 25.5 648 24 610
36×30 36 914 30 762 26.5 673 25 635 24 610
36×28 36 914 28 711.2 26.5 673 24.5 622 24 610
36×26 36 914 26 660.4 26.5 673 24.5 622 24 610
36×24 36 914 24 609.6 26.5 673 24 610 24 610
36×22 36 914 22 558.8 26.5 673 23.5 597 24 610
36×20 36 914 20 508 26.5 673 23 584 24 610
36×18 36 914 18 457.2 26.5 673 22.5 572 24 610
36×16 36 914 16 406.4 26.5 673 22 559 24 610
38×36 38 965 36 914.4 28 711 28 711 24 610
38×34 38 965 34 863.6 28 711 27.5 698 24 610
38×32 38 965 32 812.8 28 711 27 686 24 610
38×30 38 965 30 762 28 711 26.5 673 24 610
38×28 38 965 28 711.2 28 711 25.5 648 24 610
38×26 38 965 26 660.4 28 711 25.5 648 24 610
38×24 38 965 24 609.6 28 711 25 635 24 610
38×22 38 965 22 558.8 28 711 24.5 622 24 610
38×20 38 965 20 508 28 711 24 610 24 610
38×18 38 965 18 457.2 28 711 23.5 597 24 610
40×38 40 1016 38 965.2 29.5 749 29.5 749 24 610
40×36 40 1016 36 914.4 29.5 749 29 737 24 610
40×34 40 1016 34 863.6 29.5 749 28.5 724 24 610
40×32 40 1016 32 812.8 29.5 749 28 711 24 610
40×30 40 1016 30 762 29.5 749 27.5 698 24 610
40×28 40 1016 28 711.2 29.5 749 26.5 673 24 610
40×26 40 1016 26 660.4 29.5 749 26.5 673 24 610
40×24 40 1016 24 609.6 29.5 749 26 660 24 610
40×22 40 1016 22 558.8 29.5 749 25.5 648 24 610
40×20 40 1016 20 508 29.5 749 25 635 24 610
40×18 40 1016 18 457.2 29.5 749 24.5 622 24 610
42×40 42 1067 40 1016 30 762 28 711 24 610
42×38 42 1067 38 965.2 30 762 28 711 24 610
42×36 42 1067 36 914.4 30 762 28 711 24 610
42×34 42 1067 34 863.6 30 762 28 711 24 610
42×32 42 1067 32 812.8 30 762 28 711 24 610
42×30 42 1067 30 762 30 762 28 711 24 610
42×28 42 1067 28 711.2 30 762 27.5 698 24 610
42×26 42 1067 26 660.4 30 762 27.5 698 24 610
42×24 42 1067 24 609.6 30 762 26 660 24 610
42×22 42 1067 22 558.8 30 762 26 660 24 610
42×20 42 1067 20 508 30 762 26 660 24 610
42×18 42 1067 18 457.2 30 762 25.5 648 24 610
42×16 42 1067 16 406.4 30 762 25 635 24 610
44×42 44 1118 42 1066.8 32 813 30 762 24 610
44×40 44 1118 40 1016 32 813 29.5 749 24 610
44×38 44 1118 38 965.2 32 813 29 737 24 610
44×36 44 1118 36 914.4 32 813 28.5 724 24 610
44×34 44 1118 34 863.6 32 813 28.5 724 24 610
44×32 44 1118 32 812.8 32 813 28 711 24 610
44×30 44 1118 30 762 32 813 28 711 24 610
44×28 44 1118 28 711.2 32 813 27.5 698 24 610
44×26 44 1118 26 660.4 32 813 27.5 698 24 610
44×24 44 1118 24 609.6 32 813 27.5 698 24 610
44×22 44 1118 22 558.8 32 813 27 686 24 610
44×20 44 1118 20 508 32 813 27 686 24 610
46×44 46 1168 44 1117.6 33.5 851 31.5 800 28 711
46×42 46 1168 42 1066.8 33.5 851 31 787 28 711
46×40 46 1168 40 1016 33.5 851 30.5 775 28 711
46×38 46 1168 38 965.2 33.5 851 30 762 28 711
46×36 46 1168 36 914.4 33.5 851 30 762 28 711
46×34 46 1168 34 863.6 33.5 851 29.5 749 28 711
46×32 46 1168 32 812.8 33.5 851 29.5 749 28 711
46×30 46 1168 30 762 33.5 851 29 737 28 711
46×28 46 1168 28 711.2 33.5 851 29 737 28 711
46×26 46 1168 26 660.4 33.5 851 29 737 28 711
46×24 46 1168 24 609.6 33.5 851 28.5 724 28 711
46×22 46 1168 22 558.8 33.5 851 28.5 724 28 711
48×46 48 1219 46 1168.4 35 889 33 838 28 711
48×44 48 1219 44 1117.6 35 889 33 838 28 711
48×42 48 1219 42 1066.8 35 889 32 813 28 711
48×40 48 1219 40 1016 35 889 32 813 28 711
48×38 48 1219 38 965.2 35 889 32 813 28 711
48×36 48 1219 36 914.4 35 889 31 787 28 711
48×34 48 1219 34 863.6 35 889 31 787 28 711
48×32 48 1219 32 812.8 35 889 31 787 28 711
48×30 48 1219 30 762 35 889 30 762 28 711
48×28 48 1219 28 711.2 35 889 30 762 28 711
48×26 48 1219 26 660.4 35 889 30 762 28 711
48×24 48 1219 24 609.6 35 889 29 737 28 711
48×22 48 1219 22 558.8 35 889 29 737 28 711

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