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Butt Weld Reducer Metric Dimensions as per ASME B16.9

Butt Weld Reducer Dimensions

View dimensions in inches

NPS1 NPS2 OD1 OD2 H
3/4 1/2 26.7 21.3 38
3/4 3/8 26.7 17.3 38
1 3/4 33.4 26.7 51
1 1/2 33.4 21.3 51
1-1/4 1 42.2 33.4 51
1-1/4 3/4 42.2 26.7 51
1-1/4 1/2 42.2 21.3 51
1-1/2 1-1/4 48.3 42.2 64
1-1/2 1 48.3 33.4 64
1-1/2 3/4 48.3 26.7 64
1-1/2 1/2 48.3 21.3 64
2 1-1/2 60.3 48.3 76
2 1-1/4 60.3 42.2 76
2 1 60.3 33.4 76
2 3/4 60.3 26.7 76
NPS1 NPS2 OD1 OD2 H
2-1/2 2 73.0 60.3 89
2-1/2 1-1/2 73.0 48.3 89
2-1/2 1-1/4 73.0 42.2 89
2-1/2 1 73.0 33.4 89
3 2-1/2 88.9 73.0 89
3 2 88.9 60.3 89
3 1-1/2 88.9 48.3 89
3 1-1/4 88.9 42.2 89
3-1/2 3 101.6 88.9 102
3-1/2 2-1/2 101.6 73.0 102
3-1/2 2 101.6 60.3 102
3-1/2 1-1/2 101.6 48.3 102
3-1/2 1-1/4 101.6 42.2 102
4 3-1/2 114.3 101.6 102
4 3 114.3 88.9 102
NPS1 NPS2 OD1 OD2 H
4 2-1/2 114.3 73.0 102
4 2 114.3 60.3 102
4 1-1/2 114.3 48.3 102
5 4 141.3 114.3 127
5 3-1/2 141.3 101.6 127
5 3 141.3 88.9 127
5 2-1/2 141.3 73.0 127
5 2 141.3 60.3 127
6 5 168.3 141.3 140
6 4 168.3 114.3 140
6 3-1/2 168.3 101.6 140
6 3 168.3 88.9 140
6 2-1/2 168.3 73.0 140
8 6 219.1 168.3 152
8 5 219.1 141.3 152
NPS1 NPS2 OD1 OD2 H
8 4 219.1 114.3 152
8 3-1/2 219.1 101.6 152
10 8 273.0 219.1 178
10 6 273.0 168.3 178
10 5 273.0 141.3 178
10 4 273.0 114.3 178
12 10 323.8 273.0 203
12 8 323.8 219.1 203
12 6 323.8 168.3 203
12 5 323.8 141.3 203
14 12 355.6 323.8 330
14 10 355.6 273.0 330
14 8 355.6 219.1 330
14 6 355.6 168.3 330
16 14 406.4 355.6 356
NPS1 NPS2 OD1 OD2 H
16 12 406.4 323.8 356
16 10 406.4 273.0 356
16 8 406.4 219.1 356
18 16 457.0 406.4 381
18 14 457.0 355.6 381
18 12 457.0 323.8 381
18 10 457.0 273.0 381
20 18 508.0 457.0 508
20 16 508.0 406.4 508
20 14 508.0 355.6 508
20 12 508.0 323.8 508
22 20 559.0 508.0 508
22 18 559.0 457.0 508
22 16 559.0 406.4 508
22 14 559.0 355.4 508
NPS1 NPS2 OD1 OD2 H
24 22 610.0 559.0 508
24 20 610.0 508.0 508
24 18 610.0 457.0 508
24 16 610.0 406.4 508
26 24 660.0 610.0 610
26 22 660.0 559.0 610
26 20 660.0 508.0 610
26 18 660.0 457.0 610
28 26 711.0 660.0 610
28 24 711.0 610.0 610
28 20 711.0 508.0 610
28 18 711.0 457.0 610
30 28 762.0 711.0 610
30 26 762.0 660.0 610
30 24 762.0 610.0 610
NPS1 NPS2 OD1 OD2 H
30 20 762.0 508.0 610
32 30 813.0 762.0 610
32 28 813.0 711.0 610
32 26 813.0 660.0 610
32 24 813.0 610.0 610
34 32 864.0 813.0 610
34 30 864.0 762.0 610
34 26 864.0 660.0 610
34 24 864.0 610.0 610
36 34 914.0 864.0 610
36 32 914.0 813.0 610
36 30 914.0 762.0 610
36 26 914.0 660.0 610
36 24 914.0 610.0 610
38 36 965.0 914.0 610
NPS1 NPS2 OD1 OD2 H
38 34 965.0 864.0 610
38 32 965.0 813.0 610
38 30 965.0 762.0 610
38 28 965.0 711.0 610
38 26 965.0 660.0 610
40 38 1016.0 965.0 610
40 36 1016.0 914.0 610
40 34 1016.0 864.0 610
40 32 1016.0 813.0 610
40 30 1016.0 762.0 610
42 40 1067.0 1016.0 610
42 38 1067.0 965.0 610
42 36 1067.0 914.0 610
42 34 1067.0 864.0 610
42 32 1067.0 813.0 610
NPS1 NPS2 OD1 OD2 H
42 30 1067.0 762.0 610
44 42 1118.0 1067.0 610
44 40 1118.0 1016.0 610
44 38 1118.0 965.0 610
44 36 1118.0 914.0 610
46 44 1168.0 1118.0 711
46 42 1168.0 1067.0 711
46 40 1168.0 1016.0 711
46 38 1168.0 965.0 711
48 46 1219.0 1168.0 711
48 44 1219.0 1118.0 711
48 42 1219.0 1067.0 711
48 40 1219.0 1016.0 711
NPS1 NPS2 OD1 OD2 H

GENERAL NOTES:

(a) All dimensions are in inches.
(b) While the figure illustrates a bell-shaped reducer, the use of a conical reducer is not prohibited.

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