Both eccentric & concentric reducer are belong to steel pipe reducer, they also have same weight chart and calculation formula, but the shape is different.
Concentric Reducer Weight Calculation Formula
The steel pipe reducer weight formula is 0.02466 * S <(D+d)/2 – S> * H / 1000
D = Large end diameter in mm.
d = Small end diameter in mm.
S = Large end Thickness in mm.
H = Height from end to end.
If we want to calculate the weight by formula, we need to know above 4 factors. Where can you get them? Usually we get the them from pipe reducer dimensions.
Browse our reducer products.
Butt-weld concentric reducers – The most versatile connection method with high pressure ratings.
– View details about ASME B16.9 butt-weld concentric reducers.
– View details about SS316 concentric reducers.
SCH 80 heavy-wall concentric reducers – For higher pressure applications.
– View details about SCH 80 concentric reducers.
Carbon steel eccentric reducers – Used to maintain a level bottom or top of a pipe.
– View details about carbon steel eccentric reducers.
Steel Pipe 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 |
Take all above chart, we can calculate the weight now. For example, “Concentric Reducer Weld 12 x 10 Inch 15mm BW ASTM A860 WPHY 52 ASME B16.9″. From above chart, we know the below information.
Large end diameter : 323.9mm
Small end diameter : 273.1mm
Large end thickness : 15mm
Height from end to end : 203mm
Now we take these sizes into weight formula. 0.02466 x 15 <(323.9+273.1)/2 – 15> x 203 / 1000 = 21.3kg
Concentric Reducer Weight Chart
When the description is Concentric Reducer BW Seamless 4″ x 3″ Sch 160 ASTM A234 WPB ASME B16.9. We can get the below information.
Size: 4″ x 3″
Thickness: Sch 160
Type: Concentric
Technical: Seamless
Material: ASTM A234 WPB
Standard: ASME B16.9
Now we want to know the concentric reducer weight to calculate the transportation and shipping cost, there are two necessary data that size and thickness, then we can get the weight from below chart easily. That is 2.4kg.
| Concentric Reducer Weight Chart | |||||||||
| DN | NPS | 10S | 20 | STD | 40 | XS | 80 | 160 | XXS |
| 20 | 3/4 | 0.1 | / | 0.1 | 0.1 | 0.1 | 0.1 | / | / |
| 25 | 1 | 0.1 | / | 0.2 | 0.2 | 0.2 | 0.2 | / | / |
| 32 | 11/4 | 0.1 | / | 0.2 | 0.2 | 0.3 | 0.3 | 0.2 | / |
| 40 | 11/2 | 0.2 | / | 0.3 | 0.3 | 0.4 | 0.4 | / | / |
| 50 | 2 | 0.3 | / | 0.4 | 0.4 | 0.6 | 0.6 | 0.6 | 1 |
| 65 | 21/2 | 0.5 | / | 0.8 | 0.8 | 1.0 | 1.0 | 1.0 | / |
| 80 | 3 | 0.6 | / | 1.1 | 1.1 | 1.4 | 1.4 | 1.7 | 1 |
| 90 | 31/2 | 0.7 | / | 1.4 | 1.4 | 1.9 | 1.9 | / | / |
| 100 | 4 | 0.8 | / | 1.6 | 1.6 | 2.3 | 2.3 | 2.4 | / |
| 125 | 5 | 1.4 | / | 2.81 | 2.8 | 4.0 | 3.9 | 4.4 | / |
| 150 | 6 | 1.9 | / | 4.0 | 4.0 | 6.0 | 6.0 | 7.1 | 8.6 |
| 200 | 8 | 2.8 | / | 6.3 | 6.3 | 6.0 | 9.3 | 10.8 | 12.6 |
| 250 | 10 | 4.6 | 7.9 | 10.7 | 10.7 | 9.3 | 17.5 | 18.4 | 17.9 |
| 300 | 12 | 7.0 | 11.2 | 15.8 | 16.3 | 14.5 | 25.1 | 32.5 | 29.3 |
| 350 | 14 | 14.0 | 25.6 | 28.8 | 32.1 | 21.0 | 56.5 | 53.3 | 41.7 |
| 400 | 16 | 17.5 | 30.5 | 38.5 | 48.8 | 37.1 | 79 | 106.0 | / |
| 450 | 18 | 21.5 | 35.2 | 44.5 | 64.3 | 48.8 | 102 | 143.0 | / |
| 500 | 20 | 36.0 | 62.7 | 62.7 | 98.5 | 58.5 | 165 | / | / |
| 550 | 22 | 38.0 | 72.6 | 72.6 | / | 80.4 | 181 | / | / |
| 600 | 24 | 47.5 | 97.0 | 79.1 | 142.0 | 93.8 | 226 | / | / |
Steel Pipe Diameters and Wall Thickness
Sometimes we get the diameter and thickness from steel pipe dimension chart? Because the eccentric and concentric reducer, 90 degree elbow and straight and reducing tee are all made by steel pipe. That’s why they have same sizes for connecting and welding together.
| Nominal Size | Nominal Wall Thickness T | ||||||||||||||
| DN | NPS | OD | Sch10 | Sch20 | Sch30 | STD | Sch40 | Sch60 | XS | Sch80 | Sch100 | Sch120 | Sch140 | Sch160 | XXS |
| 6 | 1/8 | 10.3 | 1.24 | 1.45 | 1.73 | 1.73 | 2.41 | 2.41 | |||||||
| 8 | 1/4 | 13.7 | 1.65 | 1.85 | 2024 | 2024 | 3.02 | 3.02 | |||||||
| 10 | 3/8 | 17.1 | 1.65 | 1.85 | 2.31 | 2.31 | 3.20 | 3.20 | |||||||
| 15 | 1/2 | 21.3 | 2.11 | 2.41 | 2.77 | 2.77 | 3.73 | 3.73 | 4.78 | 7.47 | |||||
| 20 | 3/4 | 26.7 | 2.11 | 2.41 | 2.87 | 2.87 | 3.91 | 3.91 | 5.56 | 7.82 | |||||
| 25 | 1 | 33.4 | 2.77 | 2.90 | 3.38 | 3.38 | 4.55 | 4.55 | 6.35 | 9.09 | |||||
| 32 | 1 1/4 | 42.2 | 2.77 | 2.97 | 3.56 | 3.56 | 4.85 | 4.85 | 6.35 | 9.7 | |||||
| 40 | 1 1/2 | 48.3 | 2.77 | 3.18 | 3.68 | 3.68 | 5.08 | 5.08 | 7.14 | 1015 | |||||
| 50 | 2 | 60.3 | 2.77 | 3.18 | 3.91 | 3.91 | 5.54 | 5054 | 8.74 | 11.07 | |||||
| 65 | 2 1/2 | 73.0 | 3.05 | 4.78 | 5.16 | 5.16 | 7.01 | 7.01 | 9.53 | 14.02 | |||||
| 80 | 3 | 88.9 | 3.05 | 4.78 | 5.49 | 5.49 | 7.62 | 7.62 | 11.13 | 15.24 | |||||
| 90 | 3 1/2 | 101.6 | 3.05 | 4.78 | 5.74 | 5.74 | 8.08 | 8.08 | |||||||
| 100 | 4 | 114.3 | 3.05 | 4.78 | 6.02 | 6.02 | 8.56 | 8.56 | 11.13 | 13.49 | 17.12 | ||||
| 125 | 5 | 141.3 | 3.40 | 6.55 | 6.55 | 9.53 | 9.53 | 12.70 | 15.88 | 19.05 | |||||
| 150 | 6 | 168.3 | 3.40 | 7.11 | 7.11 | 10.97 | 10.97 | 14.27 | 18.26 | 21.95 | |||||
| 200 | 8 | 219.1 | 3.76 | 6.35 | 7.04 | 8.18 | 8.18 | 10.31 | 12.70 | 12.70 | 15.09 | 18.26 | 20.62 | 23.01 | 22.23 |
| 250 | 10 | 273.0 | 4.19 | 6.35 | 7.80 | 9.27 | 9.27 | 12.70 | 12.70 | 15.09 | 18.26 | 21.44 | 25.40 | 28.58 | 25.40 |
| 300 | 12 | 323.8 | 4.57 | 6.35 | 8.38 | 9.53 | 10.31 | 14.27 | 12.70 | 17.48 | 21.44 | 25.40 | 28.58 | 33.32 | 25.40 |
| 350 | 14 | 355.6 | 6.35 | 7.92 | 9.53 | 9.53 | 11.13 | 15.09 | 12.70 | 19.05 | 23.83 | 27.79 | 31.75 | 35.71 | |
| 400 | 16 | 406.4 | 6.35 | 7.92 | 9.53 | 9.53 | 12.70 | 16.66 | 12.70 | 21.44 | 26.19 | 30.56 | 36.53 | 40.49 | |
| 450 | 18 | 457.0 | 6.35 | 7.92 | 11.13 | 9.53 | 14.27 | 19.05 | 12.70 | 23.83 | 29.36 | 34.93 | 39.67 | 45.24 | |
| 500 | 20 | 508.0 | 6.35 | 9.53 | 12.70 | 9.53 | 15.09 | 20.62 | 12.70 | 26.19 | 32.54 | 38.10 | 44.45 | 50.01 | |
| 550 | 22 | 559.0 | 6.35 | 9.53 | 12.70 | 9.53 | 22.23 | 12.70 | 28.58 | 34.93 | 41.28 | 47.63 | 53.98 | ||
| 600 | 24 | 610.0 | 6.35 | 9.53 | 14.27 | 9.53 | 17.48 | 24.61 | 12.70 | 30.96 | 38.89 | 46.02 | 52.37 | 59.54 | |
What We Can Supply for Pipe Reducer
Standard: ASME B16.9, SH3408, HG/T21635 , HG/T 21635, SY/T0510
Types: Eccentric Reducer and Concentric Reducer
Size Range: 3/4″, 1″, 2″, 3″, 4″, 6″, 8″, 10″, 12″, 16″, 20″, 22″, 24″ to 48”.
Thickness: SCH 10, 20, STD, 40, 60, 80, 100, 120, 140, 160, XXS
Surface Coatings: Black Painted, Varnished, Epoxy Coated, Galvanized
Material: Carbon Steel, Alloy Steel, Stainless Steel, Duplex Steel, Copper Nickel and Nickel Alloy.