ASME/ANSI B16.9, ANSI B16.28, MSS-SP-43 Concentric Reducer Suppliers
A concentric reducer is a type of pipe fitting used to connect two pipes of different diameters in a piping system. It maintains a centerline axis between the two ends, meaning both ends of the reducer are aligned along the same centerline. The purpose of a concentric reducer is to transition from a larger pipe to a smaller pipe, or vice versa, while ensuring smooth fluid flow and minimizing turbulence.
An eccentric reducer is a type of pipe fitting used to connect two pipes of different diameters while maintaining an offset between the centerline of the pipes. Unlike a concentric reducer, which has a symmetrical, conical shape, an eccentric reducer has a non-centered design. One end is larger and the other smaller, with the change in diameter happening at an angle.
Ample Alloys is a trusted exporter specializing in high-quality reducers, including both concentric and eccentric types, designed for a wide range of industrial applications. With a focus on delivering precision-engineered products, Ample Alloys ensures that each reducer meets rigorous international standards for durability and performance. As a reliable exporter, we provide tailored solutions to meet the specific requirements of clients globally, ensuring seamless transitions in piping systems and optimal flow control in critical operations.
Industrial Eccentric Reducer Buttweld, Seamless & Welded Buttweld ASME B16.9 Reducer Pipe Fittings, Reducer Pipe Fittings, Stainless Steel Reducers, Carbon Steel Buttweld Reducers, Buttweld Reducer Schedule, Reducer for Oil & Gas
ASME B16.9 Butt weld Pipe Reducer Specifications
Size Range
1/8” NB TO 48” NB. (Seamless & 100% X-Ray Welded, Fabricated)
Wall Thickness
Sch 5s, 10s, 40s, 80s, 10, 20, 40, STD, 60, XS, 100, 120, 140, 160, Sch XXS
Stainless Steel
ASTM A403 WP 304, 304L, 304H, 316, 316L, 316H, 317, 317L, 321, 321H, 310, 310S, 347, 904L, etc.
Standards / Dimension
ASME B16.9, ASME B16.28, MSS SP-43, MSS SP-75, ASTM A234, ASTM A403, DIN 2605, 2615, 2616, 2617, 10253.
Type / Form
Concentric / Eccentric Reducer.
Alloy Steel
ASTM A234, WP1, WP5, WP9, WP11, WP22, WP91, etc.
Bending Radius
R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom
Carbon Steel
ASTM A234, A420, MSS-SP-75, WPB, WPL3, WPL6, WPHY 42, WPHY 46, WPHY 52, WPHY 56, WPHY 60, WPHY 65, WPHY 70
Duplex & Super Duplex
ASTM A815 / A815M, UNS S31803 / 2205, UNS S32205, UNS S32101 / LDX 2101, UNS S32750 / 2507, UNS S32760, UNS S32550 / Ferralium 255.
Buttweld Reducer Dimensions
| NPS | O.D. D |
O.D. D1 |
Length H |
|---|---|---|---|
| 3/4 - 1/2 | 26.7 | 21.3 | 38 |
| 1 - 1/2 | 33.4 | 21.3 | 51 |
| 1 - 3/4 | 33.4 | 26.7 | 51 |
| 1.1/4 - 1/2 | 42.2 | 21.3 | 51 |
| 1.1/4 - 3/4 | 42.2 | 26.7 | 51 |
| 1.1/4 - 1 | 42.2 | 33.4 | 51 |
| 1.1/2 - 1/2 | 48.3 | 21.3 | 64 |
| 1.1/2 - 3/4 | 48.3 | 26.7 | 64 |
| 1.1/2 - 1 | 48.3 | 33.4 | 64 |
| 1.1/2 - 1.1/4 | 48.3 | 42.2 | 64 |
| 2 - 3/4 | 60.3 | 26.7 | 76 |
| 2 - 1 | 60.3 | 33.4 | 76 |
| 2 - 1.1/4 | 60.3 | 42.2 | 76 |
| 2 - 1.1/2 | 60.3 | 48.3 | 76 |
| 2.1/2 - 1 | 73 | 33.4 | 89 |
| 2.1/2 - 1.1/4 | 73 | 42.2 | 89 |
| 2.1/2 - 1.1/2 | 73 | 48.3 | 89 |
| 2.1/2 - 2 | 73 | 60.3 | 89 |
| 3 - 1.1/4 | 88.9 | 42.2 | 89 |
| 3 - 1.1/2 | 88.9 | 48.3 | 89 |
| 3 - 2 | 88.9 | 60.3 | 89 |
| 3 - 2.1/2 | 88.9 | 73 | 89 |
| 3.1/2 - 1.1/4 | 101.6 | 42.2 | 102 |
| 3.1/2 - 1.1/2 | 101.6 | 48.3 | 102 |
| 3.1/2 - 2 | 101.6 | 60.3 | 102 |
| 3.1/2 - 2.1/2 | 101.6 | 73 | 102 |
| 3.1/2 - 3 | 101.6 | 88.9 | 102 |
| 4 - 1.1/2 | 114.3 | 48.3 | 102 |
| 4 - 2 | 114.3 | 60.3 | 102 |
| 4 - 2.1/2 | 114.3 | 73 | 102 |
| 4 - 3 | 114.3 | 88.9 | 102 |
| 4 - 3.1/2 | 114.3 | 101.6 | 102 |
| 5 - 2 | 141.3 | 60.3 | 127 |
| 5 - 2.1/2 | 141.3 | 73 | 127 |
| 5 - 3 | 141.3 | 88.9 | 127 |
| 5 - 3.1/2 | 141.3 | 101.6 | 127 |
| 5 - 4 | 141.3 | 114.3 | 127 |
| 6 - 2.1/2 | 168.3 | 73 | 140 |
| 6 - 3 | 168.3 | 88.9 | 140 |
| 6 - 3.1/2 | 168.3 | 101.6 | 140 |
| 6 - 4 | 168.3 | 114.3 | 140 |
| 6 - 5 | 168.3 | 141.3 | 140 |
| 8 - 3.1/2 | 219.1 | 101.6 | 152 |
| 8 - 4 | 219.1 | 114.3 | 152 |
| 8 - 5 | 219.1 | 141.3 | 152 |
| 8 - 6 | 219.1 | 168.3 | 152 |
| 10 - 4 | 273 | 114.3 | 178 |
| 10 - 5 | 273 | 141.3 | 178 |
| 10 - 6 | 273 | 168.3 | 178 |
| 10 - 8 | 273 | 219.1 | 178 |
| 12 - 5 | 323.9 | 141.3 | 203 |
| 12 - 6 | 323.9 | 168.3 | 203 |
| 12 - 8 | 323.9 | 219.1 | 203 |
| 12 - 10 | 323.9 | 273 | 203 |
| 14 - 6 | 355.6 | 168.3 | 330 |
| 14 - 8 | 355.6 | 219.1 | 330 |
| 14 - 10 | 355.6 | 273 | 330 |
| 14 - 12 | 355.6 | 323.9 | 330 |
| 16 - 8 | 406.4 | 219 | 356 |
| 16 - 10 | 406.4 | 273 | 356 |
| 16 - 12 | 406.4 | 323.9 | 356 |
| 16 - 14 | 406.4 | 355.6 | 356 |
| 18 - 10 | 457 | 273 | 381 |
| 18 - 12 | 457 | 323.9 | 381 |
| 18 - 14 | 457 | 355.6 | 381 |
| 18 - 16 | 457 | 406.4 | 381 |
| 20 - 12 | 508 | 323.9 | 508 |
| 20 - 14 | 508 | 355.6 | 508 |
| 20 - 16 | 508 | 406.4 | 508 |
| 20 - 18 | 508 | 457 | 508 |
| 22 - 14 | 559 | 355.6 | 508 |
| 22 - 16 | 559 | 406.4 | 508 |
| 22 - 18 | 559 | 457 | 508 |
| 22 - 20 | 559 | 508 | 508 |
| 24 - 16 | 610 | 406.4 | 508 |
| 24 - 18 | 610 | 457 | 508 |
| 24 - 20 | 610 | 508 | 508 |
| 24 - 22 | 610 | 559 | 508 |
| 26 - 18 | 660 | 457 | 610 |
| 26 - 20 | 660 | 508 | 610 |
| 26 - 22 | 660 | 559 | 610 |
| 26 - 24 | 660 | 610 | 610 |
| 28 - 18 | 711 | 457 | 610 |
| 28 - 20 | 711 | 508 | 610 |
| 28 - 24 | 711 | 610 | 610 |
| 28 - 26 | 711 | 660 | 610 |
| 30 - 20 | 762 | 508 | 610 |
| 30 - 24 | 762 | 610 | 610 |
| 30 - 26 | 762 | 660 | 610 |
| 30 - 28 | 762 | 711 | 610 |
| 32 - 24 | 813 | 610 | 610 |
| 32 - 26 | 813 | 660 | 610 |
| 32 - 28 | 813 | 711 | 610 |
| 32 - 30 | 813 | 762 | 610 |
| 34 - 24 | 864 | 610 | 610 |
| 34 - 26 | 864 | 660 | 610 |
| 34 - 30 | 864 | 762 | 610 |
| 34 - 32 | 864 | 813 | 610 |
| 36 - 24 | 914 | 610 | 610 |
| 36 - 26 | 914 | 660 | 610 |
| 36 - 30 | 914 | 762 | 610 |
| 36 - 32 | 914 | 813 | 610 |
| 36 - 34 | 914 | 864 | 610 |
| 38 - 26 | 965 | 660 | 610 |
| 38 - 28 | 965 | 711 | 610 |
| 38 - 30 | 965 | 762 | 610 |
| 38 - 32 | 965 | 813 | 610 |
| 38 - 34 | 965 | 864 | 610 |
| 38 - 36 | 965 | 914 | 610 |
| 40 - 30 | 1016 | 762 | 610 |
| 40 - 32 | 1016 | 813 | 610 |
| 40 - 34 | 1016 | 864 | 610 |
| 40 - 36 | 1016 | 914 | 610 |
| 40 - 38 | 1016 | 965 | 610 |
ASME B16.9 Reducer Tolerance
| Nominal Size (NPS) | Outside Diameter (OD) | Wall Thickness (WT) | Length (L) |
|---|---|---|---|
| 1/2" to 1" | ±1/16" | ±10% | ±1/4" |
| 1-1/4" to 2" | ±1/16" | ±10% | ±1/4" |
| 2-1/2" to 4" | ±1/8" | ±10% | ±1/4" |
| 5" to 6" | ±1/8" | ±10% | ±1/4" |
| 8" to 10" | ±3/16" | ±10% | ±3/8" |
| 12" to 14" | ±3/16" | ±10% | ±3/8" |
| 16" and above | ±3/16" | ±10% | ±1/2" |
Common Buttweld Reducer Standards
buttweld reducers are typically manufactured according to various standards that specify the design, material, dimensions, and testing of these fittings. Below are the most widely used buttweld reducer standards:
- ASME Standards:
- ASME B16.9: Factory-Made Wrought Buttwelding Fittings.
- ASME B16.25: Buttwelding Ends (preparation of ends for welding).
- ASME Standards: Wrought Steel Buttwelding Short Radius Elbows and Returns.
- ASTM Standards:
- ASTM A234: Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and High-Temperature Service.
- ASTM A403: Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings.
- ASTM A815: Standard Specification for Wrought Ferritic, Ferritic/Austenitic (Duplex), and Martensitic Stainless Steel Piping Fittings.
- ASTM A860: Standard Specification for High-Strength Low-Alloy Welded Fittings (commonly used in pipelines with high strength requirements).
- API Standards:
- API 5L: Specification for Line Pipe (not directly for fittings but related to pipe material in oil and gas industries).
- API 6A: Specification for Wellhead and Christmas Tree Equipment (covers piping components but specific to high-pressure environments in oil fields).
- MSS (Manufacturers Standardization Society) Standards:
- MSS SP-43: Wrought and Fabricated Butt-Welding Fittings for Low-Pressure, Corrosion Resistant Applications (commonly used for stainless steel in low-pressure applications).
- MSS SP-75: Specification for High-Strength Wrought, Butt-Welding Fittings (used in oil and gas for high-strength requirements).
- MSS SP-79: Socket-Welding Reducer Inserts.
- MSS SP-83: Carbon Steel Pipe Unions, Socket Welding, and Threaded.
- DIN (Deutsches Institut für Normung) Standards (European):
- DIN 2605: Steel Elbows for Butt Welding (elbows dimensions and tolerances).
- DIN 2615: Tees for Butt Welding.
- DIN 2616: Reducers for Butt Welding.
- DIN 2617: Caps for Butt Welding.
- EN (European Norms) Standards:
- EN 10253-1: Butt-Welding Pipe Fittings Made of Non-Alloy and Alloy Steels.
- EN 10253-2: Butt-Welding Pipe Fittings with Specified Elevated Temperature Properties.
- EN 10253-3: Butt-Welding Pipe Fittings Made of Austenitic and Austenitic-Ferritic (Duplex) Stainless Steel.
- EN 10253-4: Butt-Welding Pipe Fittings for Low-Pressure Applications.
- JIS (Japanese Industrial Standards):
- JIS B2311: Steel Pipe Fittings for Butt-Welding.
- JIS B2312: Cast Iron Pipe Fittings for Butt-Welding.
- JIS B2313: Malleable Iron Pipe Fittings for Butt-Welding.
- ISO (International Standards Organization) Standards:
- ISO 5251: Specifications for Butt-Welding Ends for Steel Pipe Fittings (compatible with ISO pipes and equipment globally).
- ISO 15590: Petroleum and Natural Gas Industries — Induction Bends, Fittings, and Flanges for Pipeline Transportation Systems.
- BS (British Standards):
- BS 1640: Steel Butt-Welding Pipe Fittings for the Petroleum Industry.
- BS 3799: Forged Fittings, Screwed, and Socket-Welding for the Petroleum Industry
Why Ample Alloys for Reducer!
Ample Alloys is a leading supplier and manufacturer of buttweld reducers made from various high-quality alloys. Ample Alloys specializes in providing custom-designed reducers to meet the specific requirements of the client.
Top-Notch Quality
We manufactures reducers with precision and durability, ensuring a seamless fit and reliable performance for various pipeline applications.
On-Time Deliveries
Our streamlined production and supply chain ensure timely delivery, keeping your projects on schedule.
Commitment to Customer Satisfaction
Our experienced team provides comprehensive support, from design consultation to post-sale assistance, ensuring a seamless customer experience.
Cutting-Edge Manufacturing Expertise
Equipped with advanced technology, we produce reducers that meet international standards, ensuring efficiency and durability.
- Oil and Gas
- Chemical Processing
- Power Generation
- Water Treatment
- Construction
- HVAC Systems
- Concentric Reducer: The axes of both ends of the reducer are aligned. Used where pipe alignment is critical, such as vertical pipelines.
- Eccentric Reducer: The small and large ends are offset, designed to maintain a uniform flow in horizontal pipelines, helping avoid air pockets or uneven flow.
- Strong and Leak-Proof Connections: Buttweld reducers provide a permanent and robust connection that ensures no leakage.
- Smooth Flow: They offer a smooth transition between pipe sizes, minimizing flow turbulence.
- Durability: Made from high-quality materials, they can withstand high pressures and temperatures.
- Versatility: Suitable for a wide range of industries and applications.
