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» Flange & Fitting » ASME B16.9 Reducer

ASME B16.9 Reducer

August 27, 2020

Technical Drawings

Drawing of reducer

Standard drawing of ASME B16.9 Reducer.

The reducers are often used when the piping designers want to reduce the diameter of a straight run of pipe. There are two styles of standard reducers available in ASME B16.9: Concentric – having a common centerline; Eccentric reducer – having offset centerlines.

Dimensions

NPSO.D L
mm
inch		O.D S
mm
inch		H
mm
inch
3/4 x 1/226.7
1.05		21.3
0.84		38
1.50
3/4 x 3/826.7
1.05		17.3
0.68		38
1.50
1 x 3/433.4
1.32		26.7
1.05		51
2.00
1 x 1/233.4
1.32		21.3
0.84		51
2.00
1-1/4 x 142.2
1.66		33.4
1.32		51
2.00
1-1/4 x 3/442.2
1.66		26.7
1.05		51
2.00
1-1/4 x 1/242.2
1.66		21.3
0.84		51
2.00
1-1/2 x 1-1/448.3
1.90		42.2
1.66		64
2.50
1-1/2 x 148.3
1.90		33.4
1.32		64
2.50
1-1/2 x 3/448.3
1.90		26.7
1.05		64
2.50
1-1/2 x 1/248.3
1.90		21.3
0.84		64
2.50
2 x 1-1/260.3
2.38		48.3
1.90		76
3.00
2 x 1-1/460.3
2.38		42.2
1.66		76
3.00
2 x 160.3
2.38		33.4
1.32		76
3.00
2 x 3/460.3
2.38		26.7
1.05		76
3.00
2-1/2 x 273.0
2.88		60.3
2.38		89
3.50
2-1/2 x 1-1/273.0
2.88		48.3
1.90		89
3.50
2-1/2 x 1-1/473.0
2.88		42.2
1.66		89
3.50
2-1/2 x 173.0
2.88		33.4
1.32		89
3.50
3 x 2-1/288.9
3.50		73.0
2.88		89
3.50
3 x 288.9
3.50		60.3
2.38		89
3.50
3 x 1-1/288.9
3.50		48.3
1.90		89
3.50
3 x 1-1/488.9
3.50		42.2
1.66		89
3.50
3-1/2 x 3101.6
4.00		88.9
3.50		102
4.00
3-1/2 x 2-1/2101.6
4.00		73.0
2.88		102
4.00
3-1/2 x 2101.6
4.00		60.3
2.38		102
4.00
3-1/2 x 1-1/2101.6
4.00		48.3
1.90		102
4.00
3-1/2 x 1-1/4101.6
4.00		42.2
1.66		102
4.00
4 x 3-1/2114.3
4.50		101.6
4.00		102
4.00
4 x 3114.3
4.50		88.9
3.50		102
4.00
4 x 2-1/2114.3
4.50		73.0
2.88		102
4.00
4 x 2114.3
4.50		60.3
2.38		102
4.00
4 x 1-1/2114.3
4.50		48.3
1.90		102
4.00
5 x 4141.3
5.56		114.3
4.50		127
5.00
5 x 3-1/2141.3
5.56		101.6
4.00		127
5.00
5 x 3141.3
5.56		88.9
3.50		127
5.00
5 x 2-1/2141.3
5.56		73.0
2.88		127
5.00
5 x 2141.3
5.56		60.3
2.38		127
5.00
6 x 5168.3
6.62		141.3
5.56		140
5.50
6 x 4168.3
6.62		114.3
4.50		140
5.50
6 x 3-1/2168.3
6.62		101.6
4.00		140
5.50
6 x 3168.3
6.62		88.9
3.50		140
5.50
6 x 2-1/2168.3
6.62		73.0
2.88		140
5.50
8 x 6219.1
8.62		168.3
6.62		152
6.00
8 x 5219.1
8.62		141.3
5.56		152
6.00
8 x 4219.1
8.62		114.3
4.50		152
6.00
8 x 3-1/2219.1
8.62		101.6
4.00		152
6.00
10 x 8273.0
10.75		219.1
8.62		178
7.00
10 x 6273.0
10.75		168.3
6.62		178
7.00
10 x 5273.0
10.75		141.3
5.56		178
7.00
10 x 4273.0
10.75		114.3
4.50		178
7.00
12 x 10323.8
12.75		273.0
10.75		203
8.00
12 x 8323.8
12.75		219.1
8.62		203
8.00
12 x 6323.8
12.75		168.3
6.62		203
8.00
12 x 5323.8
12.75		141.3
5.56		203
8.00
14 x 12355.6
14.00		323.8
12.75		330
13.00
14 x 10355.6
14.00		273.0
10.75		330
13.00
14 x 8355.6
14.00		219.1
8.62		330
13.00
14 x 6355.6
14.00		168.3
6.62		330
13.00
16 x 14406.4
16.00		355.6
14.00		356
14.00
16 x 12406.4
16.00		323.8
12.75		356
14.00
16 x 10406.4
16.00		273.0
10.75		356
14.00
16 x 8406.4
16.00		219.1
8.62		356
14.00
18 x 16457
18.00		406.4
16.00		381
15.00
18 x 14457
18.00		355.6
14.00		381
15.00
18 x 12457
18.00		323.8
12.75		381
15.00
18 x 10457
18.00		273.0
10.75		381
15.00
20 x 18508
20.00		457
18.00		508
20.00
20 x 16508
20.00		406.4
16.00		508
20.00
20 x 14508
20.00		355.6
14.00		508
20.00
20 x 12508
20.00		323.8
12.75		508
20.00
22 x 20559
22.00		508
20.00		508
20.00
22 x 18559
22.00		457
18.00		508
20.00
22 x 16559
22.00		406.4
16.00		508
20.00
22 x 14559
22.00		355.6
14.00		508
20.00
24 x 22610
24.00		559
22.00		508
20.00
24 x 20610
24.00		508
20.00		508
20.00
24 x 18610
24.00		457
18.00		508
20.00
24 x 16610
24.00		406.4
16.00		508
20.00
26 x 24660
26.00		610
24.00		610
24.00
26 x 22660
26.00		559
22.00		610
24.00
26 x 20660
26.00		508
20.00		610
24.00
26 x 18660
26.00		457
18.00		610
24.00
28 x 26711
28.00		660
26.00		610
24.00
28 x 24711
28.00		610
24.00		610
24.00
28 x 20711
28.00		508
20.00		610
24.00
28 x 18711
28.00		457
18.00		610
24.00
30 x 28762
30.00		711
28.00		610
24.00
30 x 26762
30.00		660
26.00		610
24.00
30 x 24762
30.00		610
24.00		610
24.00
30 x 20762
30.00		508
20.00		610
24.00
32 x 30813
32.00		762
30.00		610
24.00
32 x 28813
32.00		711
28.00		610
24.00
32 x 26813
32.00		660
26.00		610
24.00
32 x 24813
32.00		610
24.00		610
24.00
34 x 32864
34.00		813
32.00		610
24.00
34 x 30864
34.00		762
30.00		610
24.00
34 x 26864
34.00		660
26.00		610
24.00
34 x 24864
34.00		610
24.00		610
24.00
36 x 34914
36.00		864
34.00		610
24.00
36 x 32914
36.00		813
32.00		610
24.00
36 x 30914
36.00		762
30.00		610
24.00
36 x 26914
36.00		660
26.00		610
24.00
36 x 24914
36.00		610
24.00		610
24.00
38 x 36965
38.00		914
36.00		610
24.00
38 x 34965
38.00		864
34.00		610
24.00
38 x 32965
38.00		813
32.00		610
24.00
38 x 30965
38.00		762
30.00		610
24.00
38 x 28965
38.00		711
28.00		610
24.00
38 x 26965
38.00		660
26.00		610
24.00
40 x 381016
40.00		965
38.00		610
24.00
40 x 361016
40.00		914
36.00		610
24.00
40 x 341016
40.00		864
34.00		610
24.00
40 x 321016
40.00		813
32.00		610
24.00
40 x 301016
40.00		762
30.00		610
24.00
42 x 401067
42.00		1016
40.00		610
24.00
42 x 381067
42.00		965
38.00		610
24.00
42 x 361067
42.00		914
36.00		610
24.00
42 x 341067
42.00		864
34.00		610
24.00
42 x 321067
42.00		813
32.00		610
24.00
42 x 301067
42.00		711
28.00		610
24.00
44 x 421118
44.00		1067
42.00		610
24.00
44 x 401118
44.00		1016
40.00		610
24.00
44 x 381118
44.00		965
38.00		610
24.00
44 x 361118
44.00		914
36.00		610
24.00
46 x 441168
46.00		1118
44.00		711
28.00
46 x 421168
46.00		1067
42.00		711
28.00
46 x 401168
46.00		1016
40.00		711
28.00
46 x 381168
46.00		965
38.00		711
28.00
48 x 461219
48.00		1168
46.00		711
28.00
48 x 441219
48.00		1118
44.00		711
28.00
48 x 421219
48.00		1067
42.00		711
28.00
48 x 401219
48.00		1016
40.00		711
28.00

*NPS: Nominal Pipe Size; O.D L: Outside Diameter at Bevel, large end; O.D S: Outside Diameter at Bevel, small end; H: Center-to-End.

ASME B16.9 Butt Welding Fittings
Elbow L/RReducing ElbowReturn L/R
Elbow S/RReturn S/R3D Elbow
Tee & CrossReducing TeeReducing Cross
Stub EndCapReducer
End BevelToleranceWall Thickness

*Click to view dimensions of other ASME B16.9 standard fittings.

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