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Butt Weld Reducer

Butt welding reducers are tubular pipe fittings with different diameters at both ends, which are connected to the pipeline by butt welding. It is usually conical, with a larger diameter at one end and a smaller diameter at the other end, and is used to achieve a smooth transition between pipelines of different diameters.

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Butt welding reducers are tubular pipe fittings with different diameters at both ends, which are connected to the pipeline by butt welding. It is usually conical, with a larger diameter at one end and a smaller diameter at the other end, and is used to achieve a smooth transition between pipelines of different diameters.
In pipeline systems, it is often necessary to use pipelines of different diameters according to different flow rates, pressures and other requirements. Butt welding reducers can connect these pipelines of different diameters to ensure smooth flow of the medium.
According to the principles of fluid mechanics, changes in pipe diameter will affect the flow rate and pressure of the fluid. By using butt welding reducers to change the pipe diameter, the flow rate and pressure of the fluid can be adjusted to a certain extent to meet the needs of different working conditions.

Specification of Eccentric Reducer

Size Range 3/4″ – 60″ / DN20 – 1500
Thickness Schedule SCH 10 – SCH 80, SCH 160, XXS
America Standard ANSI / ASME B16.9 / MSS SP 43
Japan Standard JIS B2311/2312/2313
Germany Standard DIN2605/2615/2616/2617
Europe Standard EN10253
Carbon Steel Q235, 20#, 35#, 45#, 20G,ASTM A234 WPB/WPC
Low Temp Carbon Steel Q345B, 16Mn, ASTM A420 WPL6
Pipeline Steel ASTM A860 WPHY 42 / 46 / 56 / 60 / 65
Alloy Steel ASTM A234 WP11 / WP12 / WP 5 / WP9 / WP91 / WP92,

15CrMoG, 12Cr1MoVG, 12Cr5Mo, 1Cr5Mo, Cr9Mo, 10CrMo910, 12CrMo4-5

Stainless Steel ASTM A403 WP304/304L/304H, 316/316L, 310S, 317, 347, 904L
Dual Phase Stainless Steel A815 WPS32205/32750/31803/32760

ASME B16.9 Concentric Reducer Dimensions 

Concentric Reducer Drawing

OD1 OD2 END TO END SCH 40 WEIGHT
NPS NPS H KG
3/4 3/8 – 1/2 38 0.07
1 1/2 – 3/4 51 0.14
1 1/4 1/2 – 1 51 0.19
1 1/2 1/2 – 1 1/4 64 0.29
2 3/4 – 1 1/2 76 0.46
2 1/2 1 – 2 89 0.85
3 1 1/4 – 2 1/2 102 1.11
4 2 – 3 1/2 102 1.8
5 2 – 4 127 3.05
6 2 1/2 – 5 140 4.35
8 3 1/2 – 6 152 7.12
10 4 – 8 178 11.8
12 5 – 10 203 17.8
14 6 – 12 330 34.3
16 6 – 14 356 48.3
18 8 – 16 381 65.3
20 10 – 18 508 102
22 12 – 20 508
24 12 – 22 508 143
26 12 – 24 610
28 14 – 26 610
30 14 – 28 610
32 20 – 30 610 230
34 22 – 32 610 245
36 22 – 34 610 282
38 24 – 36 610
40 28 – 38 610
42 28 – 40 610
44 32 – 42 610
46 34 – 44 711
48 36 – 46 711
52 40 – 48 711
56 40 – 52 711
60 44 – 56 711

ASME B16.9 Eccentric Reducer Dimensions

OD1 OD2 END TO END
NPS NPS H
3/4 3/8 – 1/2 38
1 1/2 – 3/4 51
1 1/4 1/2 – 1 51
1 1/2 1/2 – 1 1/4 64
2 3/4 – 1 1/2 76
2 1/2 1 – 2 89
3 1 1/4 – 2 1/2 102
4 2 – 3 1/2 102
5 2 – 4 127
6 2 1/2 – 5 140
8 3 1/2 – 6 152
10 4 – 8 178
12 5 – 10 203
14 6 – 12 330
16 6 – 14 356
18 8 – 16 381
20 10 – 18 508
22 12 – 20 508
24 12 – 22 508
26 12 – 24 610
28 14 – 26 610
30 14 – 28 610
32 20 – 30 610
34 22 – 32 610
36 22 – 34 610
38 24 – 36 610
40 28 – 38 610
42 28 – 40 610
44 32 – 42 610
46 34 – 44 711
48 36 – 46 711
52 40 – 48 711
56 40 – 52 711
60 44 – 56 711
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