EN
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.
The Center point of the circle at both ends of the tube are on the same straight line are called concentric reducers. 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.
| 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 | ||||
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
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)
Size: 1/2"-48"(DN15-DN1200), or even bigger
Finishing: Black, Vanish, Oiled, Galvanized.
Connection type: Butt Welding.
Both concentric and eccentric reducers play a role in reducing diameter, and the connection mode is the same.
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.
Painting, oiled, galvanized.
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