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<p>Source high-performance Eccentric Reducers from a leading China factory. Our expert suppliers deliver precision ASME B16.9 pipe fittings designed to prevent cavitation and gas trapping for oil, gas, and chemical industries globally.</p>
SupplierCangzhou Weihuan Pipeline Equipment Co.,Ltd.www.weihuantube.com
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About this product
Product information from the supplier.
The Industrial Eccentric Reducer is a precision-engineered pipe fitting specifically designed to connect pipelines of differing diameters while maintaining an offset centerline. Unlike concentric alternatives, its eccentric structure is critical for industrial systems where fluid dynamics and precise pipe positioning are paramount. This specialized fitting is widely deployed across high-stakes sectors, including oil and gas, chemical processing, water treatment, and power generation, to ensure seamless transitions and peak flow efficiency.
Engineered for extreme high-performance environments, our Eccentric Reducers serve two primary strategic functions: facilitating smooth fluid media transitions and eliminating hazardous accumulation. Depending on the installation requirements, "Concentric at Top" (COT) configurations are utilized to prevent gas trapping, while "Concentric at Bottom" (COB) designs eliminate liquid pooling. This precision engineering effectively prevents cavitation in pumps and significantly reduces the risk of water hammer in high-pressure steam systems.
Detailed Parameters
| Manufacturing Standard | ANSI/ASME B16.9 Wrought Steel Fittings | Pressure Ratings | ASME B16.5 (Class 150 to 2500) |
|---|---|---|---|
| Size Range | DN15 (1/2") to DN1200 (48") | Wall Thickness | Sch 10, 20, 40, 80, 160, XXS |
| Carbon Steel | ASTM A234 WPB, A105, 20# | Stainless Steel | ASTM A403 304/304L, 316/316L, 321 |
| Alloy Materials | ASTM B366 Cr-Mo, Monel, Inconel, Titanium | Connection Types | Butt Weld (BW), Socket Weld (SW), NPT |
| Bevel Angle | 37.5° ± 2.5° (per ASME B16.25) | Eccentricity (e) | Calculated as (D - d) / 2 |
Key Advantages
Cavitation Prevention
COB-type designs eliminate liquid accumulation at pump inlets, protecting critical equipment from destructive cavitation.
Gas Venting Efficiency
COT configurations prevent gas trapping at the pipeline top, ensuring uninterrupted and stable fluid conveyance.
Low Pressure Loss
Conical transition surfaces minimize eddy currents and turbulence, significantly reducing overall system energy loss.
High-Rigidity Joints
Precision beveled ports ensure superior butt-welding strength, essential for high-pressure industrial applications.
Material Versatility
Available in Carbon, Stainless, and Alloy steels to resist corrosion and withstand extreme temperature fluctuations.
Standard Compliance
Strict adherence to ASME and ANSI standards ensures global interoperability and rigorous safety certification.
Product Gallery
Management Platforms
Inventory Control
Real-time tracking of sizes from DN15 to DN1200 to ensure rapid project deployment.
Quality Assurance
Strict dimensional inspection following ASME B16.9 to ensure zero-defect delivery.
Standard Compliance
Certified material traceability for ASTM A234 and A403 grade specifications.
Custom Engineering
Tailored eccentricity and length parameters for specialized petrochemical units.
Logistics Optimization
Global shipping solutions for heavy-duty structural metal components.
Technical Support
Professional guidance on COT vs COB selection for pump inlet installations.
Investment Return Comparison
| Performance Metric | Standard Reducer | Eccentric Reducer |
|---|---|---|
| Air Pocket Risk | High (Trapping common) | Very Low (COT Optimized) |
| Pump Lifespan | Moderate (Cavitation risk) | Extended (COB Optimized) |
| Fluid Velocity | Variable/Turbulent | Stable/Controlled |
| Maintenance Cost | Higher (Due to vibration) | Lower (Reduced Water Hammer) |
| System Efficiency | Standard | High-Performance |
Frequently Asked Questions
Q: What is the main difference between a concentric and eccentric reducer?
A concentric reducer shares the same centerline for both ends, whereas an eccentric reducer has an offset centerline. This offset allows one side to remain flat, which is critical for preventing gas pockets or liquid accumulation in horizontal pipelines.
Q: When should I choose a COB (Concentric at Bottom) reducer?
A COB reducer should be used at pump suction inlets. By keeping the bottom flat, it prevents liquid from pooling at the bottom of the pipe, which eliminates the risk of cavitation and protects the pump's impeller.
Q: Which materials are best for corrosive chemical environments?
For corrosive media, ASTM A403 Stainless Steel (304L or 316L) is highly recommended. For extreme conditions, we offer nickel-based alloys such as Inconel 600 or Monel 400.
Q: Does the Eccentric Reducer comply with ASME standards?
Yes, our products are manufactured according to ANSI/ASME B16.9 for dimensions and ASME B16.25 for beveling, ensuring they meet international safety and quality benchmarks.
Q: How is the eccentricity (e) calculated for these fittings?
The eccentricity is calculated as e = (D - d) / 2, where 'D' is the outer diameter of the large end and 'd' is the outer diameter of the small end.
Q: Can I use these reducers for high-temperature steam systems?
Absolutely. Our alloy steel options (ASTM B366 Cr-Mo) are specifically designed for high-temperature and high-pressure steam systems to prevent water hammer and vibration.
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