Description
Product Description GOST 17376 Reducer
GOST 17376 Reducer refers to a type of pipe fitting manufactured according to the GOST 17376 standard, which is widely used in Russia and other CIS countries. This standard defines the specifications for steel butt-welded pipe fittings, including reducers.
Types of GOST 17376 Reducers:
- Concentric Reducer:
- The centerlines of the inlet and outlet are aligned.
- Typically used in vertical piping systems.
- Eccentric Reducer:
- The centerlines of the inlet and outlet are offset.
- Commonly used in horizontal piping systems to prevent air pockets.
GOST 17376 Concentric and Eccentric Reducer Dimensions Chart (in lbs)
NOMINAL PIPE SIZE OUTSIDE DIAMETER END TO END
Inch D P H
3/4 x 1/2 26.7 21.3 38
3/4 x 3/8 26.7 17.1 38
1 x 3/4 33.4 26.7 51
1 x 1/2 33.4 21.3 51
1 1/4 x 1 42.2 33.4 51
1 1/4 x 3/4 42.2 26.7 51
1 1/4 x 1/2 42.2 21.3 51
1 1/2 x 1 1/2 48.3 42.2 64
1 1/2 x 1 48.3 33.4 64
1 1/2 x 3/4 48.3 26.7 64
1 1/2 x 1/2 48.3 21.3 64
2 x 1 1/2 60.3 48.2 76
2 x 1 1/4 60.3 42.2 76
2 x 1 60.3 33.4 76
2 x 3/4 60.3 26.7 76
2 1/2 x 2 73 60.3 89
2 1/2 x 1 1/2 73 48.3 89
2 1/2 x 1 1/4 73 42.2 89
2 1/2 x 1 73 33.4 89
3 x 2 1/2 88.9 73 89
3 x 2 88.9 60.3 89
3 x 1 1/2 88.9 48.3 89
3 x 1 1/4 88.9 42.2 89
3 1/2 x 3 101.6 88.9 102
3 1/2 x 21/2 101.6 73 102
3 1/2 x 2 101.6 60.3 102
3 1/2 x 1 1/2 101.6 48.3 102
3 1/2 x 1 1/4 101.6 42.2 102
4 x 3 1/2 114.3 101.6 102
4 x 3 114.3 88.9 102
4 x 2 1/2 114.3 73 102
4 x 2 114.3 60.3 102
4 x 1 1/2 114.3 48.3 102
5 x 4 141.3 114.3 127
5 x 3 1/2 141.3 101.6 127
5 x 3 141.3 88.9 127
5 x 2 1/2 141.3 73 127
5 x 2 141.3 60.3 127
6 x 5 168.3 141.3 140
6 x 4 168.3 114.3 140
6 x 3 1/2 168.3 101.6 140
6 x 3 168.3 88.9 140
6 x 2 1/2 168.3 73 140
8 x 6 219.1 168.3 152
8 x 5 219.1 141.3 152
8 x 4 219.1 114.3 152
8 x 3 1/2 219.1 101.6 152
10 x 8 273.1 219.1 178
10 x 6 273.1 168.1 178
10 x 5 273.1 141.3 178
10 x 4 273.1 114.3 178
12 x 10 323.9 273.1 203
12 x 8 323.9 219.1 203
12 x 6 323.9 168.3 203
12 x 5 323.9 141.3 203
14 x 12 355.6 323.9 330
14 x 10 355.6 273.1 330
14 x 8 355.6 219.1 330
14 x 6 355.6 168.3 330
16 x 14 406.4 355.6 356
16 x 12 406.4 323.9 356
16 x 10 406.4 273.1 356
16 x 8 406.4 219.1 356
16 x 6 406.4 168.3 356
18 x 16 457 406.4 381
18 x 14 457 355.6 381
18 x 12 457 323.9 381
18 x 10 457 273.1 381
18 x 8 457 219.1 381
20 x 18 508 457 508
20 x 16 508 406.4 508
20 x 14 508 355.6 508
20 x 12 508 323.9 508
20 x 10 508 273.1 508
20 x 8 508 219.1 508
22 x 20 559 508 508
22 x 18 559 457 508
22 x 16 559 406.4 508
22 x 14 559 355.6 508
22 x 12 559 323.9 508
24 x 10 559 273.1 508
24 x 22 610 559 508
24 x 20 610 508 508
24 x 18 610 457 508
24 x 16 610 406.4 508
24 x 14 610 355.6 508
24 x 12 610 323.9 508
24 x 10 610 273.1 508
GOST 17376 Concentric and Eccentric Reducer Weight Chart (in lbs)
Run x Branch Schedule 40 (lbs) Schedule 80 (lbs) Schedule 160 (lbs)
3/4" x 1/2" 0.6 0.8 1.0
1" x 3/4" 1.0 1.4 1.8
1 1/4" x 1" 1.4 2.0 2.6
1 1/2" x 1" 1.6 2.4 3.2
2" x 1 1/2" 2.3 3.2 4.3
2 1/2" x 2" 3.0 4.4 5.9
3" x 2" 4.2 6.1 8.2
3" x 2 1/2" 4.4 6.5 8.7
4" x 3" 6.1 9.1 12.2
5" x 4" 8.3 12.5 16.7
6" x 4" 10.3 15.5 20.7
6" x 5" 11.0 16.5 22.0
8" x 6" 16.3 24.5 32.7
10" x 8" 22.0 33.0 44.0
12" x 10" 28.6 43.0 57.3
14" x 12" 37.6 56.4 75.2
16" x 12" 46.6 69.9 93.2
18" x 16" 59.0 88.5 118.0
20" x 16" 71.0 106.5 142.0
24" x 20" 98.0 147.0 196.0
24" x 10" 78.0 117.0 156.0
GOST 17376 Concentric and Eccentric Reducer Tolerance
Parameter Tolerance
Outside Diameter (OD) Large End: ±1% of nominal OD or ±0.5 mm (whichever is greater)
Small End: ±1% of nominal OD or ±0.5 mm (whichever is greater)
Wall Thickness (WT) ±12.5% of specified wall thickness
Reducer Length (L) ±1.5% of the nominal length or ±3 mm (whichever is greater)
Concentricity Offset ≤5% of the nominal OD at the small end (for concentric reducers)
Eccentricity Offset ≤5% of the nominal OD at the small end (for eccentric reducers)
End Preparation ±1 mm for bevel length and ±2° for bevel angle
Out-of-Roundness ≤1% of nominal OD at both ends
Surface Finish Free from defects such as cracks, dents, or visible seams
Marking Tolerance Legible and durable markings in accordance with ASME, ANSI, or applicable standards
Advantages:
- Durable and reliable for high-pressure and high-temperature applications.
- Designed for a smooth flow transition, minimizing turbulence and pressure loss.
- Manufactured with precision to meet the dimensional and performance standards of GOST 17376.
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