ASME B16.9 Eccentric Reducer Supplier

ASME B16.9 Eccentric Reducer Supplier

Table of Content

Eccentric reducers are essential components used to connect pipes of differing diameters in horizontal piping systems, featuring a flat bottom face on one side to ensure a smooth and consistent flow.

Our eccentric reducers are available in a range of materials including stainless steel, carbon steel, alloy steel, high-performance nickel alloys, and duplex steel. Stainless steel reducers, particularly those made from grade 316, offer exceptional resistance to corrosion and are ideal for marine environments and high-temperature applications. Carbon steel reducers provide robust performance for general applications, while alloy steel reducers excel in extreme conditions.

We manufacture our eccentric reducers in accordance with international standards such as ANSI / ASME B16.9. For more information on dimensions, pricing, and available stock, please contact us or request a quote.

At our factory, we manufacture a variety of Eccentric Reducers adhering to different dimensions and standards including ANSI / ASME B16.9, ASME B16.28, MSS-SP-43, DIN 2650, 2615, 2616, 2617, JIS B2311, B2312, B2313, EN 10253-1, and EN 10253-2. Our SS Eccentric Reducers are available in multiple wall thicknesses or schedules, such as SCH5, SCH10, SCH20, SCH30, SCH STD, SCH40, SCH60, SCH XS, SCH80, SCH100, SCH120, SCH140, SCH160, and XXS. We offer a range of types including Seamless, Welded, and Fabricated.

The ASME B16.9 Eccentric Reducers we produce offer numerous benefits including high tensile strength, dimensional accuracy, durability, resistance to temperature extremes, and a superior finish. Eccentric reducers made from duplex stainless steel or nickel-based alloys like Monel and Inconel exhibit excellent resistance to chloride-ion stress corrosion cracking. Carbon Steel Eccentric Reducers also show good resistance to oxidizing environments, while Incoloy reducers are highly resistant to oxidation and chemical corrosion. Additionally, most reducers in our stock have a low creep rate under high stress at elevated temperatures, and those processed with suitable heat treatments have high stress-rupture effectiveness.

As a leading manufacturer, distributor, and supplier of high-quality steel products, including various sizes and shapes of Eccentric Reducers, we ensure that our products meet ASTM, ASME, DIN, and other international standards. For special cases, we can tailor orders to meet customized requirements.

  • Seamless pipes: Outside diameter from ½” (21.34 mm) to 24″ (609.60 mm)
  • Welded pipes: Outside diameter from 26″ (660.00 mm) to 72″ (1829.00 mm)

B16.9 Eccentric Reducer Specification

SpecificationsASME B16.9 Eccentric Reducer
Eccentric Reducer Schedule 80 Pipe Fittings sizeSeamless Butt Weld Fittings: 1/2″ – 10″
Welded Butt Weld Fittings: 1/2″ – 48″
Eccentric Buttweld Reducer DimensionsASME/ANSI B16.9, ASME B16.28, MSS-SP-43, BS4504, BS4504, BS1560, BS10
Eccentric Reducer b16.9 ThicknessSCH10, SCH20, SCH30, STD SCH40, SCH60, XS, SCH 80, SCH 100, SCH 120, SCH 140, SCH 160, XXS available with NACE MR 01-75
Eccentric Pipe Reducer TypesSeamless / ERW / Welded / Fabricated Pipe Fittings
Eccentric Reducer Schedule 40 TypeDN15-DN1200
ConnectionWelding
Bending RadiusR=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom Pipe Fittings
Stainless Steel Eccentric Reducer B16.9 Size Range½” NB to 24″ NB in Sch 10s, 40s, 80s, 160s, XXS. (DN6~DN100)
Eccentric Buttweld Reducer FittingsAngle : 22.5 deg, 30deg, 45 deg, 90 deg, 180 deg, 1.0D, 1.5D, 2.0D, 2.5D, 3D, 4D, 5D, 6D, 7D-40D.
Standard: ASME B16.9, ASME B16.28, ASME B16.25, MSS SP-75 DIN2605 JISB2311 JISB2312 JISB2313, BS, GB, ISO
Manufacturing process for CS Eccentric ReducerPush, Press, Forge, Cast, etc.
Eccentric Pipe Reducer Fittings Test CertificatesEN 10204/3.1B
Raw Materials Certificate
100% Radiography Test Report
Third Party Inspection Report, etc
Origin & Mills For Carbon Steel Eccentric Reducer MaterialJapanese, Indian, USA, Korean, European, Ukraine, Russian
Key markets and industries for SS Eccentric Reducer
  • Bitumen upgraders.
  • Heavy oil refineries.
  • Nuclear power (mostly seamless).
  • Petrochemicals and acids.
Eccentric Reducer Schedule 40 Application
  • Fittings To Connect Pipe & Tubes in Petroleum, Power, Chemical, Construction, Gas, Metallurgy, Shipbuilding etc
  • ASME B16.9 Schedule 10 Eccentric Reducer are an economical alternative for lower-pressure applications.
  • ANSI B16.9 Schedule 40 Eccentric Reducer have a thicker wall for higher-pressure applications.
Eccentric Reducer Material & Grades
  • Stainless Steel Eccentric Reducers: Available in grades such as ASTM A403 WP316/316L, ASTM A403 WP304/304L, ASTM A182 F316L, 304L, DIN 1.4301, DIN 1.4306, DIN 1.4401, DIN 1.4404, 304H, 309, 310, 316, 316L, 317L, 321, and 904L.
  • Carbon Steel Eccentric Reducers: Manufactured to standards including ASTM A234, ASME SA234 WPB, WPBW, WPHY 42, WPHY 46, WPHY 52, WPH 60, WPHY 65, and WPHY 70.
  • Alloy Steel Eccentric Reducers: Compliant with ASTM A234 and ASME SA234 grades such as WP1, WP5, WP9, WP11, WP22, and WP91.
  • Duplex Steel Eccentric Reducers: Available in ASTM A815, ASME SA815 UNS No S31803, and S32205 grades.
  • Super Duplex Eccentric Reducers: Produced according to ASTM A815 and ASME SA815 standards, in grades UNS No S32750 and S32950.
  • Nickel Alloy Eccentric Reducers: Offered in various grades including ASTM B336, ASME SB336, Nickel 200 (UNS No. N02200), Nickel 201 (UNS No. N02201), Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500), Inconel 800 (UNS No. N08800), Inconel 825 (UNS No. N08825), Inconel 600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601), Hastelloy C276 (UNS No. N10276), Alloy 20 (UNS No. N08020), Titanium (Grade I & II), Cupro-Nickel 70/30, CuNi10Fe1Mn, and CuNi30Mn1Fe.
  • Low Temperature Carbon Steel Eccentric Reducers: Conforming to ASTM A420 WPL3 and A420 WPL6 standards.
Material Test Certificates (MTC) as per EN 10204 3.1 and EN 10204 3.2, Test Certificates certifying NACE MR0103, NACE MR0175

ASME B16.9 Eccentric Reducer Types

ASME B16.9 Eccentric Reducer SCH 10 ANSI B16.9 ASTM A234 WPB Eccentric Reducer Pipe Fitting

ASME B16.9 Eccentric Reducer SCH 10 ANSI B16.9 ASTM A234 WPB Eccentric Reducer Pipe Fitting

Eccentric Reducer Schedule 40 ANSI B16.9, BW, ASTM A234 WP5 Seamless Eccentric Reducer

Eccentric Reducer Schedule 40 ANSI B16.9, BW, ASTM A234 WP5 Seamless Eccentric Reducer

SS Eccentric Reducer Sch 80 A234 WPB, ANSI B16.9, Black Reducer, Eccentric, 10 X 6 Inch, BW

SS Eccentric Reducer Sch 80 A234 WPB, ANSI B16.9, Black Reducer, Eccentric, 10 X 6 Inch, BW

ASME B16.9 CS Eccentric Reducer 8×4 Inch, SCH 40, SS A403 WP304 Eccentric Reducer, BW

ASME B16.9 CS Eccentric Reducer 8×4 Inch, SCH 40, SS A403 WP304 Eccentric Reducer, BW

MSS SP43 MS Eccentric Reducer ASTM A234 WPB, Butt Weld ECC Reducer, ASME B16.9

Buttweld Eccentric Reducer Schedule 40 Buttweld, ASTM A234 WP11 Eccentric Reducer

Buttweld Eccentric Reducer Schedule 40 Buttweld, ASTM A234 WP11 Eccentric Reducer

Eccentric Reducer Dimensions

ASME B16.9 Eccentric Reducer Dimensions
Code RCD REISOØ BIGØ SMALLHEIGHT H mmTHEORETICAL WEIGHT KG
DND mmThickness S mmDNd mmThickness s mm
27 213/426.92.31/221.32.0380.08
33 21133.72.61/221.32.0500.09
33 273/426.92.30.09
42 211″1/442.42.61/221.32.0500.12
42 273/426.92.30.13
42 33133.72.60.14
*48 211″1/248.32.61/221.32.0640.18
48 273/426.92.30.19
48 33133.72.60.20
48 421″1/442.42.60.20
60 27260.32.93/426.92.3760.30
60 33133.72.60.31
60 421″1/442.42.60.32
60 481″1/248.32.60.33
76 332″1/276.12.9133.72.6900.40
76 421″1/442.42.60.47
76 481″1/248.32.60.48
76 60260.32.60.49
89 42388.93.21″1/442.42.6900.55
89 481″1/248.32.60.61
89 60260.32.90.62
89 762″1/276.12.90.63
114 484114.33.61″1/248.32.61000.85
114 60260.32.90.98
114 762″1/276.12.91.00
114 89388.93.21.02
139 605139.74.0260.32.91271.60
139 762″1/276.12.91.70
139 89388.93.21.74
139 1144114.33.61.76
*168 766168.34.52″1/276.12.91402.60
168 89388.93.22.70
168 1144114.33.62.82
168 1395139.74.02.94
219 1148219.16.34114.33.61525.03
219 1395139.74.05.12
219 1686168.34.55.18
*273 11410273.06.34114.33.61787.00
*273 1395139.74.07.20
273 1686168.34.57.40
273 2198219.16.37.55
323 16812323.97.16168.34.520311.00
323 2198219.16.311.10
323 273102736.311.20

Eccentric Reducer Weight Chart


Nominal Diameter
Outside Diameter
End to End
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

Dimensional Tolerances of Grooved Eccentric Reducer

Nominal Pipe Size1/2 to 2.1/23 to 3.1/245 to 8
Outside Diameter
at Bevel (D)
+ 1.6
– 0.8
1.61.6+ 2.4
– 1.6
Inside Diameter at End0.81.61.61.6
Overall Length (H)2222
Nominal Pipe Size10 to 1820 to 2426 to 3032 to 48
Outside Diameter
at Bevel (D)
+ 4
– 3.2
+ 6.4
– 4.8
+ 6.4
– 4.8
+ 6.4
– 4.8
Inside Diameter at End3.24.8+ 6.4
– 4.8
+ 6.4
– 4.8
Overall Length (H)2255
Wall Thickness (t)Not less than 87.5% of Nominal Wall Thickness

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