The Center point of the circle at both ends of the tube are on the same straight line are called concentric reducer. The Concentric reducer (reducing pipe) is a pipe fitting used for the diameter of the pipe. The commonly used forming process is reducing diameter pressing, expanding diameter pressing or reducing diameter plus expanding diameter pressing, and stamping forming can also be used for reducing diameter pipes of certain specifications.

Con Reducer Black Paint Seamless Buttweld Dimensions

Size O.D at Bevel H Size O.D at Bevel H

Large End Small End Large End Small End

3/4"x1/2" 26.7 21.3 38 5x3 1/2" 141.3 101.6 127

3/4"x3/8" 26.7 17.3 38 5x3" 141.3 88.9 127

1x3/4" 33.4 16.7 51 5x2 1/2" 141.3 73 127

1x1/2" 33.4 21.3 51 5x2" 141.3 60.3 127

1 1/4x1" 42.2 33.4 51 6x5" 168.3 141.3 140

1 1/4x3/4" 42.2 26.7 51 6x4" 168.3 114.3 140

1 1/4x1/2" 42.2 21.3 51 6x3 1/2" 168.3 101.6 140

1 1/2x1 1/4" 48.3 42.2 64 6x3" 168.3 88.9 140

1 1/2x1" 48.3 33.4 64 6x2 1/2" 168.3 73 140

1 1/2x3/4" 48.3 26.7 64 8x6" 219.1 168.3 152

1 1/2x1/2" 48.3 21.3 64 8x5" 219.1 141.3 152

2x1 1/2" 60.3 48.3 76 8x4" 219.1 114 152

2x1 1/4" 60.3 42.2 76 8x3 1/2" 219.1 101.6 152

2x1" 60.3 33.4 76 10x8" 273 219.1 178

2x3/4" 60.3 26.7 76 10x6" 273 168.3 178

2 1/2x2" 73 60.3 89 10x5" 273 141.3 178

2 1/2x1 1/2" 73 48.3 89 10x4" 273 114.3 178

2 1/2x1 1/4" 73 42.2 89 12x10" 323.8 273 203

2 1/2x1" 73 33.4 89 12x8" 323.8 219.1 203

3x2 1/2" 88.9 73 89 12x6" 323.8 168.3 203

3x2" 88.9 60.3 89 12x5" 323.8 141.3 203

3x1 1/2" 88.9 48.3 89 14x12" 355.6 323.8 330

3x1 1/4" 88.9 42.2 89 14x10" 355.6 273 330

3 1/2x3" 101.6 88.9 102 14x8" 355.6 219.1 330

3 1/2x2 1/2" 101.6 73 102 14x6" 355.6 168.3 330

3 1/2x2" 101.6 60.3 102 16x14" 406.4 355.6 356

3 1/2x1 1/2" 101.6 48.3 102 16x12" 406.4 323.8 356

3 1/2x1 1/4" 101.6 42.2 102 16x10" 406.4 273 356

4x3 1/2" 114.3 101.6 102 16x8" 406.4 219.1 356

4x3" 114.3 88.9 102 18x16" 457 406.4 381

4x2 1/2" 114.3 73 102 18x14" 457 355.6 381

4x2" 114.3 60.3 102 18x12" 457 323.8 381

4x1 1/2" 114.3 48.3 102 18x10" 457 273 381

5x4" 141.3 114.3 127

Concentric Reducer Black Paint Seamless/Welded VS Eccentric Reducer

1. Standard (Similarity):

Both concentric reducer black paint and eccentric reducer manufacture standard can be ASME B16.9,ASME B16.28,MSS SP-43,MSS SP-75 JIS B2311,DIN2605/2615/2616/2617,GOST 17375/17376/17378/17379,ISO

2 Wall Thickness (Similarity):

Both concentric reducer black paint and eccentric reducer wall thickness can be SCH10/10S, SCH20/the 20S, STD, SCH40/40S, XS,SCH80, XXS ETC.(for ANSI), SGP(for JIS)

3. Range of Applications (Similarity):

Size: 1/2"-48"(DN15-DN1200), or even bigger

Finishing: Black, Vanish, Oiled, Galvanized.

Connection type: Butt Welding.

4. Installation (Similarity):

Both concentric and eccentric reducers play a role in reducing diameter, and the connection mode is the same.

Concentric Reducer Black Paint Seamless Buttweld FAQs

What is the Difference Between Concentric and Eccentric Reducers?

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A concentric reducer is symmetrical: both ends are aligned along the center.

An eccentric reducer is not symmetrical: ends are off center of one another.

What is the Surface Treatment for Carbon Steel Buttweld Fittings?

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Painting, oiled, galvanized.

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