ASME B16.9 Concentric Reducer Manufacturers, Stockist, Suppliers – Seamless Reducer, Welded Reducer, Large Diameter Fabricated Reducer Factory

  • We are a specialist manufacturer of concentric reducer in size range of 1/2″ to 48″ in accordance with ASME B16.9. We also produce custom size reducers as per design or drawing from our customers. Concentric reducers can be manufactured in seamless, welded or fabricated form. While seamless reducers can be produced upto size of 24″, we can produce welded and fabricated reducers upto a size range of 48″ or even higher in some cases.
  • Concentric Reducers are used to join pipe or tube sections on the same axis. They provide an in-line conical transition between pressurized pipes of differing diameters. A pipe reducer can be a single diameter change or a multiple diameter change. The pipes cannot recognize what the outside configuration of the pipe reducer looks like.
  • The concentric reducer is cone-shaped, and is used when there is a shift in diameter between pipes. For example, when a 1″ pipe transitions into a 3/4″ pipe and the top or bottom of the pipe doesn’t need to remain level.
  • Concentric reducer is one of the most commonly used type of buttweld pipe fittings, produce as per ASME B16.9 dimensional specification.

Concentric Reducer Production Range & Product Specifications

Product Concentric Reducer
Type Seamless, Pipe Welded, Fabricated
Size Seamless: 1/2″ – 24″; welded: 8″ – 100″
Thickness 1mm to 25mm
Standards ASME B16.9, DIN, ISO, ASTM
Surface Finish Annealed & Pickled, Transparent oil, Black Oil or Hot Dip Galvanized
Test Certificate EN 10204 3.1
  • Please contact us for any further question or inquiry regarding Concentric Reducers. We will promptly reply to you and offer you a reasonable price. We can manufacture concentric reducer in stainless steel, alloy steel and carbon steel. We provide these pipe fittings at market leading rates and we also offer price guarantee for all the products we offer to sale.

Material Grades for Producing Concentric Reducer

Stainless Steel 304, 304L, 306, 316L, 304H, 309S, 309H, 310S, 310H, 316TI, 316H, 316LN, 317, 317L, 321, 321H, 347, 347H, 904L, ASTM A312/A403 TP304, TP304L, TP316, TP316L
Duplex & Super Duplex Steel UNS S31803, UNS S32205, UNS S32750, UNS S32760
Carbon Steel ASTM/ ASME A 105, ASTM/ ASME A 350 LF 2, ASTM / ASME A 53 GR. A & B, ASTM A 106 GR. A, B & C. API 5L GR. B, API 5L X 42, X 46, X 52, X 60, X 65 & X 70. ASTM / ASME A 691 GR A, B & C
Alloy Steel ASTM / ASME A 182, ASTM / ASME A 335, ASTM / ASME A 234 GR P 1, P 5, P 9, P 11, P 12, P 22, P 23, P 91, ASTM / ASME A 691 GR 1 CR, 1 1/4 CR, 2 1/4 CR, 5 CR, 9CR, 91
Copper Alloy Steel ASTM/ASME SB 111 UNS NO. C10100, C10200, C10300, C10800, C12000, C12200, C70600, C71500, ASTM / ASME SB 466 UNS NO. C70600 ( CU -NI- 90/10), C71500 ( CU-NI- 70/30)
Nickel Alloy Steel ASTM / ASME SB 336, ASTM / ASME SB 564 / 160 / 163 / 472, UNS 2200 (NICKEL 200) , UNS 2201 (NICKEL 201 ) , UNS 4400 (MONEL 400 ) , UNS 8020 ( ALLOY 20 / 20 CB 3 ) , UNS 8825 INCONEL (825) , UNS 6600 (INCONEL 600 ) , UNS 6601 (INCONEL 601) , UNS 6625 (INCONEL 625) , UNS 10276 (HASTELLOY C 276)

Use of Concentric Reducers

  • Concentric reducers will transition gracefully between the piping and the pump.
  • The concentric reducers help in transporting slurries or abrasive liquids.
  • They are useful in services where cavitation is present.
  • When transporting between flanges or pipes of different ratings and wear protection is necessary, concentric reducers are ideal.
  • Concentric reducers are used in discharge of the pump.

Applications of Concentric Reducer

  • Petrochemical industry
  • Pharmaceutical industry
  • Food industry
  • Aviation and aerospace industry
  • Architectural decoration industry
  • Oil and Gas Pipeline industry

Dimensions of ASME B16.9 Reducers

Concentric Reducer Drawing
Eccentric Reducer Drawing
  • The technical drawing of ASME B16.9 reducers, concentric & eccentric.
REDUCERS
inches mm D d H
3/4 x 3/4 20 x 15 26.67 21.34 38.1
3/4 x 3/8 20 x 10 26.67 17.14 38.1
1 x 3/4 25 x 20 33.4 26.67 50.8
1 x 1/2 25 x 15 33.4 21.34 50.8
1 1/4 x 1 32 x 25 42.16 33.4 50.8
1 1/4 x 3/4 32 x 20 42.16 26.67 50.8
1 1/4 x 1/2 32 x 15 42.16 21.34 50.8
1 1/2 x 1 1/4 40 x 32 48.26 42.16 63.5
1 1/2 x 1 40 x 25 48.26 33.4 63.5
1 1/2 x 3/4 40 x 20 48.26 26.67 63.5
1 1/2 x 1/2 40 x 15 48.26 21.34 63.5
2 x 1 1/2 50 x 40 60.32 48.26 76.2
2 x 1 1/4 50 x 32 60.32 42.16 76.2
2 x 1 50 x 25 60.32 33.4 76.2
2 x 3/4 50 x 20 60.32 26.67 76.2
2 1/2 x 2 65 x 50 73.02 60.32 88.9
2 1/2 x 1 1/2 65 x 40 73.02 48.26 88.9
2 1/2 x 1 1/4 65 x 32 73.02 42.16 88.9
2 1/2 x1 65 x 25 73.02 33.4 88.9
3 x 2 1/2 80 x 65 88.9 73.02 88.9
3 x 2 80 x 50 88.9 60.32 88.9
3 x 1 1/2 80 x 40 88.9 48.26 88.9
3 x 1 1/4 80 x 32 88.9 42.16 88.9
3 1/2 x 3 90 x 80 101.6 88.9 101.6
3 1/2 x 2 1/2 90 x 65 101.6 73.02 101.6
3 1/2 x 2 90 x 50 101.6 60.32 101.6
3 1/2 x 1 1/2 90 x 40 101.6 48.26 101.6
3 1/2 x 1 1/4 90 x 32 101.6 42.16 101.6
4 x 3 1/2 100 x 90 114.3 73.02 101.6
4 x 3 100 x 80 114.3 88.9 101.6
4 x 2 1/2 100 x 65 114.3 73.02 101.6
4 x 2 100 x 50 114.3 60.32 101.6
4 x 1 1/2 100 x 40 114.3 48.26 101.6
5 x 4 125 x 100 141.3 114.3 127
5 x 3 1/2 125 x 90 141.3 101.6 127
5 x 3 125 x 80 141.3 88.9 127
5 x 2 1/2 125 x 65 141.3 73.02 127
5 x 2 125 x 50 141.3 60.32 127
6 x 5 150 x 125 168.27 141.3 139.7
6 x 4 150 x 100 168.27 114.3 139.7
6 x 1/2 150 x 90 168.27 101.6 139.7
6 x 3 150 x 80 168.27 88.9 139.7
6 x 1/2 150 x 65 168.27 73.02 139.7
8 x 6 200 x 150 219.07 168.27 152.4
8 x 5 200 x 125 219.07 141.3 152.4
8 x 4 200 x 100 219.07 114.3 152.4
8 x 3 1/2 200 x 90 219.07 101.6 152.4
10 x 8 250 x 200 273.05 219.07 177.8
10 x 6 250 x 150 273.05 168.27 177.8
10 x 5 250 x 125 273.05 141.3 177.8
10 x 4 250 x 100 273.05 114.3 177.8
12 x 10 300 x 250 323.85 273.05 203.2
12 x 8 300 x 200 323.85 219.07 203.2
12 x 6 300 x 150 323.85 168.27 203.2
12 x 5 300 x 125 323.85 141.3 203.2
14 x 12 350 x 300 355.6 323.85 330.2
14 x 10 350 x 250 355.6 273.05 330.2
14 x 8 350 x 200 355.6 219.07 330.2
14 x 6 350 x 150 355.6 168.27 330.2
16 x 14 400 x 350 406.4 355.6 355.6
16 x 12 400 x 300 406.4 323.85 355.6
16 x 10 400 x 250 406.4 273.05 355.6
16 x 8 400 x 200 406.4 219.07 355.6
18 x 16 450 x 400 457.2 406.4 381
18 x 14 450 x 350 457.2 355.6 381
18 x 12 450 x 300 457.2 323.85 381
18 x 10 450 x 250 457.2 273.05 381
20 x 18 500 x 450 508 457.2 508
20 x 16 500 x 400 508 406.4 508
20 x 14 500 x 350 508 355.6 508
20 x 12 500 x 300 508 323.85 508
22 x 20 550 x 500 558.8 508 508
22 x 18 550 x 450 558.8 457.2 508
22 x 16 550 x 400 558.8 406.4 508
22 x 14 550 x 350 558.8 355.6 508
24 x 22 600 x 550 609.6 558.8 508
24 x 20 600 x 500 609.6 508 508
24 x 18 600 x 450 609.6 457.2 508
24 x 16 600 x 400 609.6 406.4 508
Dimension in mm.

Dimension of Large Size Concentric Reducers

Eccentric Reducer Drawing
Nominal Diameter Outside Diameter (mm) End to End (mm)
D1*D2
DN NPS Series A Series B H
20×15 3/4×1/2 26.9×21.3 25×18 38
20×10 3/4×3/8 26.9×17.3 25×14 38
25×20 1×3/4 33.7×26.9 32×25 51
25×15 1×1/2 33.7×21.3 32×18 51
32×25 1.1/4×1 42.4×33.7 38×32 51
32×20 1.1/4×3/4 42.4×26.9 38×25 51
32×15 1.1/4×1/2 42.4×21.3 38×18 51
40×32 1.1/2×1.1/4 48.3×42.4 45×38 64
40×25 1.1/2×1 48.3×33.7 45×32 64
40×20 1.1/2×3/4 48.3×26.9 45×25 64
40×15 1.1/2×1/2 48.3×21.3 45×18 64
50×40 2×1.1/2 60.3×48.3 57×45 76
50×32 2×1.1/4 60.3×42.4 57×38 76
50×25 2×1 60.3×33.7 57×32 76
50×20 2×3/4 60.3×26.9 57×25 76
65×50 2.1/2×2 73.0×60.3 76×57 89
65×40 2.1/2×1.1/2 73.0×48.3 76×45 89
65×32 2.1/2×1.1/4 73.0×42.4 76×38 89
65×25 2.1/2×1 73.0×33.7 76×32 89
80×65 3×2.1/2 88.9×73.0 89×76 89
80×50 3×2 88.9×60.3 89×57 89
80×40 3×1.1/2 88.9×48.3 89×45 89
80×32 3×1.1/4 88.9×42.4 89×38 89
90×80 3.1/2×3 101.6×88.9 102
90×65 3.1/2×2.1/2 101.6×73.0 102
90×50 3.1/2×2 101.6×60.3 102
90×40 3.1/2×1.1/2 101.6×48.3 102
90×32 3.1/2×1.1/4 101.6×42.4 102
100×90 4×3.1/2 114.3×101.6 102
100×80 4×3 114.3×88.9 108×89 102
100×65 4×2.1/2 114.3×73.0 108×76 102
100×50 4×2 114.3×60.3 108×57 102
100×40 4×1.1/2 114.3×48.3 108×45 102
125×100 5×4 141.3×114.3 133×108 127
125×90 5×3.1/2 141.3×101.6 127
125×80 5×3 141.3×88.9 133×89 127
125×65 5×2.1/2 141.3×73.0 133×76 127
125×50 5×2 141.3×60.3 133×57 127
150×125 6×5 168.3×141.3 159×133 140
150×100 6×5 168.3×114.3 159×108 140
150×90 6×3.1/2 168.3×101.6 140
150×80 6×3 168.3×88.9 159×89 140
150×65 6×2.1/2 168.3×73.0 159×76 140
200×150 8×6 219.1×168.3 219×159 152
200×125 8×5 219.1×141.3 219×133 152
200×100 8×4 219.1×114.3 219×108 152
200×90 8×3.1/2 219.1×101.6 152
250×200 10×8 273.0×219.1 273×219 178
250×150 10×6 273.0×168.3 273×159 178
250×125 10×5 273.0×141.3 273×133 178
250×100 10×4 273.0×114.3 273×108 178
300×250 12×10 323.9×273.1 325×273 203
300×200 12×8 323.9×219.1 325×219 203
300×150 12×6 323.9×168.3 325×159 203
300×125 12×5 323.9×141.3 325×133 203
350×300 14×12 355.6×323.9 377×325 330
350×250 14×10 355.6×273.0 377×273 330
350×200 14×8 355.6×219.1 377×219 330
350×150 14×6 355.6×168.3 377×159 330
400×350 16×14 406.4×355.6 426×377 356
400×300 16×12 406.4×323.9 426×325 356
400×250 16×10 406.4×273.0 426×273 356
400×200 16×8 406.4×219.1 426×219 356
450×400 18×16 457×406.4 478×426 381
450×350 18×14 457×355.6 478×377 381
450×300 18×12 457×323.9 478×325 381
450×250 18×10 457×273.0 478×273 381
500×450 20×18 508×457 529×478 508
500×400 20×16 508×406.4 529×426 508
500×350 20×14 508×355.6 529×377 508
500×300 20×12 508×323.9 529×325 508
550×500 22×20 559×508 508
550×450 22×18 559×457 508
550×400 22×16 559×406.4 508
550×350 22×14 559×355.6 508
600×550 24×22 610×559 508
600×500 24×20 610×508 630×529 508
600×450 24×18 610×457 630×478 508
600×400 24×22 610×406.4 630×426 508
650×600 26×24 660×610 610
650×550 26×22 660×559 610
650×500 26×20 660×508 610
650×450 26×18 660×457 610
700×650 28×26 711×660 610
700×600 28×24 711×610 720×630 610
700×550 28×22 711×559 610
700×500 28×20 711×508 720×530 610
750×700 30×28 762×711 610
750×650 30×26 762×660 610
750×600 30×24 762×610 610
750×550 30×22 762×559 610
800×750 32×30 813×762 610
800×700 32×28 813×711 820×720 610
800×650 32×26 813×660 610
800×600 32×24 813×610 820×630 610
850×800 34×32 864×813 610
850×750 34×30 864×762 610
850×700 34×28 864×711 610
850×650 34×26 864×660 610
900×850 36×34 914×864 610
900×800 36×32 914×813 920×820 610
900×750 36×30 914×762 610
900×700 36×28 914×711 920×720 610
950×900 38×36 965×914 610
950×850 38×34 965×864 610
950×800 38×32 965×813 610
950×750 38×30 965×762 610
1000×950 40×38 1016×965 610
1000×900 40×36 1016×914 1020×920 610
1000×850 40×34 1016×864 610
1000×800 40×32 1016×813 1020×820 610
1050×1000 42×40 1067×1016 610
1050×950 42×38 1067×965 610
1050×900 42×36 1067×914 610
1050×850 42×34 1067×864 610
1100×1050 44×42 1118×1067 610
1100×1000 44×40 1118×1016 1120×1020 610
1100×950 44×38 1118×965 610
1100×900 44×36 1118×914 1220×920 610
1150×1100 46×44 1168×1118 711
1150×1050 46×42 1168×1067 711
1150×1000 46×40 1168×1016 711
1150×950 46×38 1168×965 711
1200×1150 48×46 1220×1168 711
1200×1100 48×44 1220×1118 1220×1120 711
1200×1050 48×42 1220×1067 711
1200×1000 48×40 1220×1016 1220×1020 711