ASME B16.9 Concentric & Eccentric Reducers – Seamless & welded, beveled ends as per per ASME B16.9, MSS-SP-75, DIN 2616. Materials include SS304/316, A234 WPB, Duplex & Nickel Alloys. Bulk stock available.
Bhavani Industries is a trusted manufacturer and supplier of premium-quality Buttweld Reducers, offering both Concentric and Eccentric types for high-performance industrial piping systems. A reducer is a vital pipe fitting used to change the diameter of a pipeline, thereby managing flow rates, reducing turbulence, and maintaining system integrity. Concentric reducers are cone-shaped fittings that join pipe sections on a common centerline and are typically used in vertical piping systems where there is no risk of air accumulation. On the other hand, eccentric reducers have an offset centerline and are primarily used in horizontal pipelines to prevent air pockets in liquid flow or to avoid accumulation of solids in gas systems. Both types are essential for providing a smooth transition between pipes of different sizes while maintaining consistent flow characteristics.
Our reducers are available in sizes from ½” to 48” (DN15 to DN1200) and wall thicknesses ranging from SCH 5 to SCH 160 / XXS, manufactured in compliance with global standards such as ASME B16.9, ASTM A234, ASTM A403, MSS-SP-75, and EN 10253. Reducers from Bhavani Industries are produced using advanced forming techniques like hot forming, cold forming, pressing, and machining, followed by precision beveling as per ANSI B16.25. These reducers offer excellent mechanical strength, corrosion resistance, and leak-proof weldability, making them suitable for use in high-temperature and high-pressure applications across diverse industries.
We manufacture concentric and eccentric reducers using a wide range of materials, including Stainless Steel (304, 304L, 316, 316L, 321, 347, 904L), Carbon Steel (ASTM A234 WPB, WPC), Alloy Steel (WP5, WP11, WP22, WP91), and Nickel Alloys (Inconel, Monel, Hastelloy, Alloy 20). These reducers are extensively used in oil & gas, petrochemical, power generation, water treatment, chemical processing, marine, and offshore piping systems. The advantages of using buttweld reducers include reduced pipe stress, minimized pressure drops, prevention of cavitation, improved flow efficiency, and the ability to connect pipes of varying diameters without additional components. Every reducer undergoes stringent quality control checks such as PMI, UT, RT, hydro testing, and third-party inspections to ensure compliance with customer and industry standards. Bhavani Industries is committed to delivering reliable, high-precision reducers that support the integrity and efficiency of complex pipeline systems.
High-Performance Concentric & Eccentric Pipe Reducers – Supplied in stainless steel, carbon steel, alloy steel, and Duplex. SCH 10 to XXS, sizes up to 48". Compliant with ASME B16.9 & DIN 2616. Bulk export available.
Technical Index
Industrial Reducer Standard Specifications
| Buttweld Reducer Size Availability | 1/2″～48″ NB (Seamless, Welded, and Fabricated) |
|---|---|
| Types | Concentric, Eccentric Reducer |
| Wall Thickness | Schedule 5S, 10S, 20S, S10, S20, S30, STD, 40S, S40, S60, XS, 80S, S80, S100, S120, S140, S160, XXS and others |
| Dimensions | ASME B16.9, MSS-SP-75, ANSI/ASME B16.28 (where applicable) |
| DIN | DIN 2615, DIN 2616, DIN 2617 (where applicable) |
| BS | BS EN 10253, BS 1640 (where applicable) |
| Material Grades | Stainless Steel (SS304, SS316), Carbon Steel (ASTM A234 WPB), Alloy Steel, Duplex, Super Duplex, Inconel |
| Coating / Surface Treatment | Black Paint, Anti-rust Coating, Galvanized (Hot/Cold Dip), Pickled, Passivated |
| Ends | Beveled (BW) Ends as per ASME B16.25, Plain Ends, Flanged (on request) |
| Tolerance | As per ASME B16.9 / customer specification |
| Testing | PMI, Hydro Test, UT, RT, Visual, Dimensional Inspection, Hardness Test (on request) |
| Certification | EN 10204 3.1 / 3.2, ISO 9001:2015, PED Certified (on request) |
| Material Sourcing Regions | India, Japan, USA, Europe, South Korea |
| Global Export Markets | UAE, Saudi Arabia, Qatar, Oman, Kuwait, Bahrain, USA, Canada, Singapore, Malaysia, Nigeria, Egypt, South Africa, Kenya, Turkey, Kazakhstan, Indonesia, Brazil, Australia |
Industrial Buttweld Reducers Standards
| ANSI/ASME B16.9 – Factory-Made Wrought Steel Buttwelding Fittings | ANSI/ASME B16.28 – Wrought Steel Short Radius Elbows and Returns | ANSI/ASME B16.25 – Buttwelding Ends(beval standards) | MSS SP-43 – Wrought and fabricated Butt welding Fittings for Light Wall Applications |
| MSS SP-75 – High Test Wrought Butt welding Fittings | DIN 2616 – Butt welding Pipe Fittings: Reducers | DIN 2617 – Butt welding Pipe Fittings: Caps | DIN28011 – Dished Ends(used in pressure vessels) |
| EN10253-1 Butt-welding Pipe Fittings(Non Alloy Steels) | EN10253-2 Butt-welding Pipe Fittings(Stainless/Alloy Steels) |
Buttweld Reducer Material Grades and Standards
| Stainless Steel Concentric / Eccentric Reducer | ASTM A403 WP304/304L, WP316/316L, ASTM A774(Welded):DIN 1.4301, DIN1.4306, DIN 1.4401, DIN 1.4404 |
|---|---|
| Duplex Steel Concentric / Eccentric Reducer | ASTM A 815 / ASME SA 815 UNS S31803, S32205. Werkstoff No. 1.4462 |
| Super Duplex Steel Concentric / Eccentric Reducer | ASTM A 815 / ASME SA 815 UNS S32750, S32950. Werkstoff No. 1.4410 |
| Carbon Steel Concentric / Eccentric Reducer | ASTM A234 / ASME SA234 WPB , WPBW, ASTM A860 WPHY 42, 46, 52, 60, 65, 70. |
| Alloy Steel Concentric / Eccentric Reducer | ASTM A234 / ASME SA 234 Gr. WP 1, WP 5, WP 9, WP 11, WP 12, WP 22, WP 91 |
| High Nickel Alloy Concentric / Eccentric Reducer | ASTM B336, ASME SB336, Nickel 200 (UNS No. No2200), 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 C 276 (UNS No. N10276), Alloy 20 (UNS No. N08020), Titanium (Grade I & II), Cupro-Nickel 70/30, CuNi10Fe1Mn, CuNi30Mn1Fe. |
| Other Specialty Concentric / Eccentric Reducer | Materials: Tin Bronze, Aluminum Bronze, Lead Bronze, Nimonic 75, Nimonic 80A, Nimonic 90, AISI 4140, AISI 4130, Mild Steel, Al6XN |
ASME B16.9 Buttweld Fittings Types
Butt weld Eccentric Reducer Industries & Applications
Buttweld Concentric Reducer Dimensional Tolerance
| RCD Reiso Code | BIG Ø | SMALL Ø | Hight (H) MM | Theoretical Weight In KG (Kilogram) | ||||
|---|---|---|---|---|---|---|---|---|
| (DN) | (D) MM | Thickness Of (S) In MM. | (DN) | (D) MM | Thickness Of (S) MM | |||
| 27 21 | 3/4 | 26.9 | 2.3 | 1/2 | 21.3 | 2.0 | 38 | 0.08 |
| 33 21 | 1 | 33.7 | 2.6 | 1/2 | 21.3 | 2.0 | 50 | 0.09 |
| 33 27 | 3/4 | 26.9 | 2.3 | 0.09 | ||||
| 42 21 | 1″1/4 | 42.4 | 2.6 | 1/2 | 21.3 | 2.0 | 50 | 0.12 |
| 42 27 | 3/4 | 26.9 | 2.3 | 0.13 | ||||
| 42 33 | 1 | 33.7 | 2.6 | 0.14 | ||||
| *48 21 | 1″1/2 | 48.3 | 2.6 | 1/2 | 21.3 | 2.0 | 64 | 0.18 |
| 48 27 | 3/4 | 26.9 | 2.3 | 0.19 | ||||
| 48 33 | 1 | 33.7 | 2.6 | 0.20 | ||||
| 48 42 | 1″1/4 | 42.4 | 2.6 | 0.20 | ||||
| 60 27 | 2 | 60.3 | 2.9 | 3/4 | 26.9 | 2.3 | 76 | 0.30 |
| 60 33 | 1 | 33.7 | 2.6 | 0.31 | ||||
| 60 42 | 1″1/4 | 42.4 | 2.6 | 0.32 | ||||
| 60 48 | 1″1/2 | 48.3 | 2.6 | 0.33 | ||||
| 76 33 | 2″1/2 | 76.1 | 2.9 | 1 | 33.7 | 2.6 | 90 | 0.40 |
| 76 42 | 1″1/4 | 42.4 | 2.6 | 0.47 | ||||
| 76 48 | 1″1/2 | 48.3 | 2.6 | 0.48 | ||||
| 76 60 | 2 | 60.3 | 2.6 | 0.49 | ||||
| 89 42 | 3 | 88.9 | 3.2 | 1″1/4 | 42.4 | 2.6 | 90 | 0.55 |
| 89 48 | 1″1/2 | 48.3 | 2.6 | 0.61 | ||||
| 89 60 | 2 | 60.3 | 2.9 | 0.62 | ||||
| 89 76 | 2″1/2 | 76.1 | 2.9 | 0.63 | ||||
| 114 48 | 4 | 114.3 | 3.6 | 1″1/2 | 48.3 | 2.6 | 100 | 0.85 |
| 114 60 | 2 | 60.3 | 2.9 | 0.98 | ||||
| 114 76 | 2″1/2 | 76.1 | 2.9 | 1.00 | ||||
| 114 89 | 3 | 88.9 | 3.2 | 1.02 | ||||
| 139 60 | 5 | 139.7 | 4.0 | 2 | 60.3 | 2.9 | 127 | 1.60 |
| 139 76 | 2″1/2 | 76.1 | 2.9 | 1.70 | ||||
| 139 89 | 3 | 88.9 | 3.2 | 1.74 | ||||
| 139 114 | 4 | 114.3 | 3.6 | 1.76 | ||||
| *168 76 | 6 | 168.3 | 4.5 | 2″1/2 | 76.1 | 2.9 | 140 | 2.60 |
| 168 89 | 3 | 88.9 | 3.2 | 2.70 | ||||
| 168 114 | 4 | 114.3 | 3.6 | 2.82 | ||||
| 168 139 | 5 | 139.7 | 4.0 | 2.94 | ||||
| 219 114 | 8 | 219.1 | 6.3 | 4 | 114.3 | 3.6 | 152 | 5.03 |
| 219 139 | 5 | 139.7 | 4.0 | 5.12 | ||||
| 219 168 | 6 | 168.3 | 4.5 | 5.18 | ||||
| *273 114 | 10 | 273.0 | 6.3 | 4 | 114.3 | 3.6 | 178 | 7.00 |
| *273 139 | 5 | 139.7 | 4.0 | 7.20 | ||||
| 273 168 | 6 | 168.3 | 4.5 | 7.40 | ||||
| 273 219 | 8 | 219.1 | 6.3 | 7.55 | ||||
| 323 168 | 12 | 323.9 | 7.1 | 6 | 168.3 | 4.5 | 203 | 11.00 |
| 323 219 | 8 | 219.1 | 6.3 | 11.10 | ||||
| 323 273 | 10 | 273 | 6.3 | 11.20 | ||||
Eccentric Reducer Dimensions
| Code RCD REISO | BIG Ø | SMALL Ø | Hight (H) MM | Theoretical Weight In (KG) Kilogram | ||||
|---|---|---|---|---|---|---|---|---|
| (DN) | (D) MM | Thickness Of (S) MM | (DN) | (D) MM | Thickness Of (S) MM | |||
| 27 21 | 3/4 | 26.9 | 2.3 | 1/2 | 21.3 | 2.0 | 38 | 0.08 |
| 33 21 | 1 | 33.7 | 2.6 | 1/2 | 21.3 | 2.0 | 50 | 0.09 |
| 33 27 | 3/4 | 26.9 | 2.3 | 0.09 | ||||
| 42 21 | 1″1/4 | 42.4 | 2.6 | 1/2 | 21.3 | 2.0 | 50 | 0.12 |
| 42 27 | 3/4 | 26.9 | 2.3 | 0.13 | ||||
| 42 33 | 1 | 33.7 | 2.6 | 0.14 | ||||
| *48 21 | 1″1/2 | 48.3 | 2.6 | 1/2 | 21.3 | 2.0 | 64 | 0.18 |
| 48 27 | 3/4 | 26.9 | 2.3 | 0.19 | ||||
| 48 33 | 1 | 33.7 | 2.6 | 0.20 | ||||
| 48 42 | 1″1/4 | 42.4 | 2.6 | 0.20 | ||||
| 60 27 | 2 | 60.3 | 2.9 | 3/4 | 26.9 | 2.3 | 76 | 0.30 |
| 60 33 | 1 | 33.7 | 2.6 | 0.31 | ||||
| 60 42 | 1″1/4 | 42.4 | 2.6 | 0.32 | ||||
| 60 48 | 1″1/2 | 48.3 | 2.6 | 0.33 | ||||
| 76 33 | 2″1/2 | 76.1 | 2.9 | 1 | 33.7 | 2.6 | 90 | 0.40 |
| 76 42 | 1″1/4 | 42.4 | 2.6 | 0.47 | ||||
| 76 48 | 1″1/2 | 48.3 | 2.6 | 0.48 | ||||
| 76 60 | 2 | 60.3 | 2.6 | 0.49 | ||||
| 89 42 | 3 | 88.9 | 3.2 | 1″1/4 | 42.4 | 2.6 | 90 | 0.55 |
| 89 48 | 1″1/2 | 48.3 | 2.6 | 0.61 | ||||
| 89 60 | 2 | 60.3 | 2.9 | 0.62 | ||||
| 89 76 | 2″1/2 | 76.1 | 2.9 | 0.63 | ||||
| 114 48 | 4 | 114.3 | 3.6 | 1″1/2 | 48.3 | 2.6 | 100 | 0.85 |
| 114 60 | 2 | 60.3 | 2.9 | 0.98 | ||||
| 114 76 | 2″1/2 | 76.1 | 2.9 | 1.00 | ||||
| 114 89 | 3 | 88.9 | 3.2 | 1.02 | ||||
| 139 60 | 5 | 139.7 | 4.0 | 2 | 60.3 | 2.9 | 127 | 1.60 |
| 139 76 | 2″1/2 | 76.1 | 2.9 | 1.70 | ||||
| 139 89 | 3 | 88.9 | 3.2 | 1.74 | ||||
| 139 114 | 4 | 114.3 | 3.6 | 1.76 | ||||
| *168 76 | 6 | 168.3 | 4.5 | 2″1/2 | 76.1 | 2.9 | 140 | 2.60 |
| 168 89 | 3 | 88.9 | 3.2 | 2.70 | ||||
| 168 114 | 4 | 114.3 | 3.6 | 2.82 | ||||
| 168 139 | 5 | 139.7 | 4.0 | 2.94 | ||||
| 219 114 | 8 | 219.1 | 6.3 | 4 | 114.3 | 3.6 | 152 | 5.03 |
| 219 139 | 5 | 139.7 | 4.0 | 5.12 | ||||
| 219 168 | 6 | 168.3 | 4.5 | 5.18 | ||||
| *273 114 | 10 | 273.0 | 6.3 | 4 | 114.3 | 3.6 | 178 | 7.00 |
| *273 139 | 5 | 139.7 | 4.0 | 7.20 | ||||
| 273 168 | 6 | 168.3 | 4.5 | 7.40 | ||||
| 273 219 | 8 | 219.1 | 6.3 | 7.55 | ||||
| 323 168 | 12 | 323.9 | 7.1 | 6 | 168.3 | 4.5 | 203 | 11.00 |
| 323 219 | 8 | 219.1 | 6.3 | 11.10 | ||||
| 323 273 | 10 | 273 | 6.3 | 11.20 | ||||
ASME B16.9 Buttweld Reducers Weight Chart
| Normal Pipe Sizes | LBS | Weight In Kilogram |
| 3/4-1/2 | 0.17 | 0.08 |
| 3/4-3/8 | 0.15 | 0.07 |
| 1-3/4 | 0.4 | 0.18 |
| 1-1/2 | 0.4 | 0.18 |
| 1.1/4-1 | 0.5 | 0.23 |
| 1.1/4-3/4 | 0.4 | 0.18 |
| 1.1/4-1/2 | 0.4 | 0.18 |
| 1.1/2-1.1/4 | 0.7 | 0.32 |
| 1.1/2-1 | 0.62 | 0.28 |
| 1.1/2-3/4 | 0.54 | 0.24 |
| 1.1/2-1/2 | 0.5 | 0.23 |
| 2-1.1/2 | 0.9 | 0.41 |
| 2-1.1/4 | 0.84 | 0.38 |
| 2-1 | 0.76 | 0.34 |
| 2-3/4 | 0.7 | 0.32 |
| 2.1/2-2 | 1.5 | 0.68 |
| 2.1/2-1.1/2 | 1.38 | 0.63 |
| 2.1/2-1.1/4 | 1.25 | 0.57 |
| 2.1/2-1 | 1.25 | 0.57 |
| 3-2.1/2 | 2 | 0.91 |
| 3-2 | 1.8 | 0.82 |
| 3-1.1/2 | 1.7 | 0.77 |
| 3-1.1/4 | 1.6 | 0.73 |
| 3.1/2-3 | 3.15 | 1.43 |
| 3.1/2-2.1/2 | 2.88 | 1.31 |
| 3.1/2-2 | 2.75 | 1.25 |
| 3.1/2-1.1/2 | 2.5 | 1.13 |
| 3.1/2-1.1/4 | 2.4 | 1.09 |
| 4-3.1/2 | 3.5 | 1.59 |
| 4-3 | 3.38 | 1.53 |
| 4-2.1/2 | 3.25 | 1.47 |
| 4-2 | 3 | 1.36 |
| 4-1.1/2 | 2.88 | 1.31 |
| 5-4 | 6 | 2.72 |
| 5-3.1/2 | 5.75 | 2.61 |
| 5-3 | 5.5 | 2.49 |
| 5-2.1/2 | 5.25 | 2.38 |
| 5-2 | 5 | 2.27 |
| 6-5 | 8.5 | 3.86 |
| 6-4 | 8.25 | 3.74 |
| 6-3.1/2 | 8.25 | 3.74 |
| 6-3 | 8 | 3.63 |
| 6-2.1/2 | 7.25 | 3.29 |
| 8-6 | 13.2 | 5.99 |
| 8-5 | 12 | 5.44 |
| 8-4 | 11 | 4.99 |
| 8-3.1/2 | 11 | 4.99 |
| 10-8 | 22 | 9.98 |
| 10-6 | 21.5 | 9.75 |
| 10-5 | 21 | 9.53 |
| 10-4 | 20 | 9.07 |
| 12-10 | 34 | 15.42 |
| 12-8 | 32 | 14.51 |
| 12-6 | 31 | 14.06 |
| 12-5 | 30 | 13.61 |
| 14-12 | 60 | 27.22 |
| 14-10 | 59.2 | 26.85 |
| 14-8 | 58.5 | 26.54 |
| 14-6 | 58 | 26.31 |
| 16-14 | 71 | 32.21 |
| 16-12 | 70 | 31.75 |
| 16-10 | 69.5 | 31.52 |
| 16-8 | 68.5 | 31.07 |
| 16-6 | – | – |
| 18-16 | 85 | 38.56 |
| 18-14 | 84 | 38.1 |
| 18-12 | 83 | 37.65 |
| 18-10 | 82 | 37.19 |
| 18-8 | – | – |
| 20-18 | 125 | 56.7 |
| 20-16 | 124 | 56.25 |
| 20-14 | 122 | 55.34 |
| 20-12 | 120 | 54.43 |
| 20-10 | – | – |
| 20-8 | – | – |
| 22-20 | 142 | 64.41 |
| 22-18 | 138 | 62.6 |
| 22-16 | 131 | 59.42 |
| 22-14 | 123 | 55.79 |
| 22-12 | – | – |
| 22-10 | – | – |
| 24-22 | – | – |
| 24-20 | 150 | 68.04 |
| 24-18 | 148 | 67.13 |
| 24-16 | 145 | 65.77 |
| 24-14 | – | – |
| 24-12 | – | – |
| 24-10 | – | – |
| 26-24 | 207 | 93.89 |
| 26-22 | 200 | 90.72 |
| 26-20 | 190 | 86.18 |
| 26-18 | 182 | 82.55 |
| 26-16 | – | – |
| 26-14 | – | – |
| 26-12 | – | – |
| 28-26 | 224 | 101.6 |
| 28-24 | 216 | 97.98 |
| 28-22 | 210 | 95.25 |
| 28-20 | 199 | 90.26 |
| 30-28 | 241 | 109.32 |
| 30-26 | 232 | 105.23 |
| 30-24 | 224 | 101.6 |
| 30-22 | 220 | 99.79 |
| 30-20 | 220 | 99.79 |
| NPS | LBS | KG |
Major Industrial Buttweld Pipe Reducers Export Countries
United Arab Emirates (UAE), Jordan, Bahrain, Kuwait, Oman, Qatar, Saudi Arabia, United States of America (USA), Singapore, Malaysia, Azerbaijan, Armenia, Georgia, Egypt, Algeria, Nigeria, South Africa, Kenya, Morocco, Ethiopia, Ghana, Tanzania, Sudan, Uganda, Angola.