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

ProductConcentric Reducer
TypeSeamless, Pipe Welded, Fabricated
SizeSeamless: 1/2″ – 24″; welded: 8″ – 100″
Thickness1mm to 25mm
StandardsASME B16.9, DIN, ISO, ASTM
Surface FinishAnnealed & Pickled, Transparent oil, Black Oil or Hot Dip Galvanized
Test CertificateEN 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 Steel304, 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 SteelUNS S31803, UNS S32205, UNS S32750, UNS S32760
Carbon SteelASTM/ 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 SteelASTM / 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 SteelASTM/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 SteelASTM / 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
inchesmmDdH
3/4 x 3/420 x 1526.6721.3438.1
3/4 x 3/820 x 1026.6717.1438.1
1 x 3/425 x 2033.426.6750.8
1 x 1/225 x 1533.421.3450.8
1 1/4 x 132 x 2542.1633.450.8
1 1/4 x 3/432 x 2042.1626.6750.8
1 1/4 x 1/232 x 1542.1621.3450.8
1 1/2 x 1 1/440 x 3248.2642.1663.5
1 1/2 x 140 x 2548.2633.463.5
1 1/2 x 3/440 x 2048.2626.6763.5
1 1/2 x 1/240 x 1548.2621.3463.5
2 x 1 1/250 x 4060.3248.2676.2
2 x 1 1/450 x 3260.3242.1676.2
2 x 150 x 2560.3233.476.2
2 x 3/450 x 2060.3226.6776.2
2 1/2 x 265 x 5073.0260.3288.9
2 1/2 x 1 1/265 x 4073.0248.2688.9
2 1/2 x 1 1/465 x 3273.0242.1688.9
2 1/2 x165 x 2573.0233.488.9
3 x 2 1/280 x 6588.973.0288.9
3 x 280 x 5088.960.3288.9
3 x 1 1/280 x 4088.948.2688.9
3 x 1 1/480 x 3288.942.1688.9
3 1/2 x 390 x 80101.688.9101.6
3 1/2 x 2 1/290 x 65101.673.02101.6
3 1/2 x 290 x 50101.660.32101.6
3 1/2 x 1 1/290 x 40101.648.26101.6
3 1/2 x 1 1/490 x 32101.642.16101.6
4 x 3 1/2100 x 90114.373.02101.6
4 x 3100 x 80114.388.9101.6
4 x 2 1/2100 x 65114.373.02101.6
4 x 2100 x 50114.360.32101.6
4 x 1 1/2100 x 40114.348.26101.6
5 x 4125 x 100141.3114.3127
5 x 3 1/2125 x 90141.3101.6127
5 x 3125 x 80141.388.9127
5 x 2 1/2125 x 65141.373.02127
5 x 2125 x 50141.360.32127
6 x 5150 x 125168.27141.3139.7
6 x 4150 x 100168.27114.3139.7
6 x 1/2150 x 90168.27101.6139.7
6 x 3150 x 80168.2788.9139.7
6 x 1/2150 x 65168.2773.02139.7
8 x 6200 x 150219.07168.27152.4
8 x 5200 x 125219.07141.3152.4
8 x 4200 x 100219.07114.3152.4
8 x 3 1/2200 x 90219.07101.6152.4
10 x 8250 x 200273.05219.07177.8
10 x 6250 x 150273.05168.27177.8
10 x 5250 x 125273.05141.3177.8
10 x 4250 x 100273.05114.3177.8
12 x 10300 x 250323.85273.05203.2
12 x 8300 x 200323.85219.07203.2
12 x 6300 x 150323.85168.27203.2
12 x 5300 x 125323.85141.3203.2
14 x 12350 x 300355.6323.85330.2
14 x 10350 x 250355.6273.05330.2
14 x 8350 x 200355.6219.07330.2
14 x 6350 x 150355.6168.27330.2
16 x 14400 x 350406.4355.6355.6
16 x 12400 x 300406.4323.85355.6
16 x 10400 x 250406.4273.05355.6
16 x 8400 x 200406.4219.07355.6
18 x 16450 x 400457.2406.4381
18 x 14450 x 350457.2355.6381
18 x 12450 x 300457.2323.85381
18 x 10450 x 250457.2273.05381
20 x 18500 x 450508457.2508
20 x 16500 x 400508406.4508
20 x 14500 x 350508355.6508
20 x 12500 x 300508323.85508
22 x 20550 x 500558.8508508
22 x 18550 x 450558.8457.2508
22 x 16550 x 400558.8406.4508
22 x 14550 x 350558.8355.6508
24 x 22600 x 550609.6558.8508
24 x 20600 x 500609.6508508
24 x 18600 x 450609.6457.2508
24 x 16600 x 400609.6406.4508
Dimension in mm.

Dimension of Large Size Concentric Reducers

Eccentric Reducer Drawing
Nominal DiameterOutside Diameter (mm)End to End (mm)
D1*D2
DNNPSSeries ASeries BH
20×153/4×1/226.9×21.325×1838
20×103/4×3/826.9×17.325×1438
25×201×3/433.7×26.932×2551
25×151×1/233.7×21.332×1851
32×251.1/4×142.4×33.738×3251
32×201.1/4×3/442.4×26.938×2551
32×151.1/4×1/242.4×21.338×1851
40×321.1/2×1.1/448.3×42.445×3864
40×251.1/2×148.3×33.745×3264
40×201.1/2×3/448.3×26.945×2564
40×151.1/2×1/248.3×21.345×1864
50×402×1.1/260.3×48.357×4576
50×322×1.1/460.3×42.457×3876
50×252×160.3×33.757×3276
50×202×3/460.3×26.957×2576
65×502.1/2×273.0×60.376×5789
65×402.1/2×1.1/273.0×48.376×4589
65×322.1/2×1.1/473.0×42.476×3889
65×252.1/2×173.0×33.776×3289
80×653×2.1/288.9×73.089×7689
80×503×288.9×60.389×5789
80×403×1.1/288.9×48.389×4589
80×323×1.1/488.9×42.489×3889
90×803.1/2×3101.6×88.9102
90×653.1/2×2.1/2101.6×73.0102
90×503.1/2×2101.6×60.3102
90×403.1/2×1.1/2101.6×48.3102
90×323.1/2×1.1/4101.6×42.4102
100×904×3.1/2114.3×101.6102
100×804×3114.3×88.9108×89102
100×654×2.1/2114.3×73.0108×76102
100×504×2114.3×60.3108×57102
100×404×1.1/2114.3×48.3108×45102
125×1005×4141.3×114.3133×108127
125×905×3.1/2141.3×101.6127
125×805×3141.3×88.9133×89127
125×655×2.1/2141.3×73.0133×76127
125×505×2141.3×60.3133×57127
150×1256×5168.3×141.3159×133140
150×1006×5168.3×114.3159×108140
150×906×3.1/2168.3×101.6140
150×806×3168.3×88.9159×89140
150×656×2.1/2168.3×73.0159×76140
200×1508×6219.1×168.3219×159152
200×1258×5219.1×141.3219×133152
200×1008×4219.1×114.3219×108152
200×908×3.1/2219.1×101.6152
250×20010×8273.0×219.1273×219178
250×15010×6273.0×168.3273×159178
250×12510×5273.0×141.3273×133178
250×10010×4273.0×114.3273×108178
300×25012×10323.9×273.1325×273203
300×20012×8323.9×219.1325×219203
300×15012×6323.9×168.3325×159203
300×12512×5323.9×141.3325×133203
350×30014×12355.6×323.9377×325330
350×25014×10355.6×273.0377×273330
350×20014×8355.6×219.1377×219330
350×15014×6355.6×168.3377×159330
400×35016×14406.4×355.6426×377356
400×30016×12406.4×323.9426×325356
400×25016×10406.4×273.0426×273356
400×20016×8406.4×219.1426×219356
450×40018×16457×406.4478×426381
450×35018×14457×355.6478×377381
450×30018×12457×323.9478×325381
450×25018×10457×273.0478×273381
500×45020×18508×457529×478508
500×40020×16508×406.4529×426508
500×35020×14508×355.6529×377508
500×30020×12508×323.9529×325508
550×50022×20559×508508
550×45022×18559×457508
550×40022×16559×406.4508
550×35022×14559×355.6508
600×55024×22610×559508
600×50024×20610×508630×529508
600×45024×18610×457630×478508
600×40024×22610×406.4630×426508
650×60026×24660×610610
650×55026×22660×559610
650×50026×20660×508610
650×45026×18660×457610
700×65028×26711×660610
700×60028×24711×610720×630610
700×55028×22711×559610
700×50028×20711×508720×530610
750×70030×28762×711610
750×65030×26762×660610
750×60030×24762×610610
750×55030×22762×559610
800×75032×30813×762610
800×70032×28813×711820×720610
800×65032×26813×660610
800×60032×24813×610820×630610
850×80034×32864×813610
850×75034×30864×762610
850×70034×28864×711610
850×65034×26864×660610
900×85036×34914×864610
900×80036×32914×813920×820610
900×75036×30914×762610
900×70036×28914×711920×720610
950×90038×36965×914610
950×85038×34965×864610
950×80038×32965×813610
950×75038×30965×762610
1000×95040×381016×965610
1000×90040×361016×9141020×920610
1000×85040×341016×864610
1000×80040×321016×8131020×820610
1050×100042×401067×1016610
1050×95042×381067×965610
1050×90042×361067×914610
1050×85042×341067×864610
1100×105044×421118×1067610
1100×100044×401118×10161120×1020610
1100×95044×381118×965610
1100×90044×361118×9141220×920610
1150×110046×441168×1118711
1150×105046×421168×1067711
1150×100046×401168×1016711
1150×95046×381168×965711
1200×115048×461220×1168711
1200×110048×441220×11181220×1120711
1200×105048×421220×1067711
1200×100048×401220×10161220×1020711