Product Description: Concentric reducer is a type of pipeline connector with different diameters at both ends but overlapping centerlines. …
Concentric Reducer
A Concentric Reducer is a pipe fitting designed to connect two pipes of different diameters while maintaining a common centerline. Its symmetrical cone-shaped design allows for a smooth transition between larger and smaller pipe sizes without altering the alignment of the piping system.
With a gradual reduction in diameter and a smooth internal surface, concentric reducers help minimize turbulence, pressure loss, and flow resistance. They are widely used in oil & gas, petrochemical, water treatment, power generation, HVAC, and other industrial piping systems where efficient fluid flow and reliable connections are essential.
Product Features
• Common Centerline Design
The centerlines of both ends are aligned, ensuring that the pipeline remains straight after installation without changing its original axis.
• Smooth Flow Transition
The tapered internal structure provides a gradual diameter reduction, reducing turbulence and pressure loss during fluid transportation.
• Low Flow Resistance
The smooth inner wall minimizes energy loss and improves flow efficiency for liquids, gases, steam, and other media.
• Easy Installation
No directional requirements during installation. Simply connect the larger end to the larger pipe and the smaller end to the smaller pipe.
• Wide Material Compatibility
Available in carbon steel, stainless steel, and alloy steel materials for various operating environments and service conditions.
Manufacturing & Quality Control
Haiyuan Pipe Fittings manufactures Concentric Reducers using advanced production technologies and strict quality control procedures to ensure reliable performance and dimensional accuracy.
Stamping Forming
Suitable for small and medium-sized reducers. Pipe blanks or steel plates are formed into a tapered shape using precision molds, ensuring accurate dimensions and smooth surface quality.
Forging Forming
Recommended for high-pressure and large-diameter applications. Forged reducers provide excellent mechanical strength, superior pressure resistance, and long service life.
Welded Fabrication
Large-size or customized reducers can be fabricated by welding pipes of different diameters into a concentric tapered structure, followed by comprehensive inspection and testing.
Each reducer undergoes strict inspections including:
• Raw Material Verification
• Dimensional Inspection
• Surface Examination
• Welding Quality Inspection
• Mechanical Property Testing
• Pressure Testing
• Final Quality Control Verification
Materials & Standards
Available Materials
• Carbon Steel (ASTM A234 WPB, Q235B, 20# Steel)
• Stainless Steel (ASTM A403 WP304, WP304L, WP316, WP316L)
• Alloy Steel (ASTM A234 WP11, WP22, WP91)
• Low Temperature Steel
• Customized Materials Available
Manufacturing Standards
Produced according to international standards including:
• ASME B16.9
• ASTM A234
• ASTM A403
• EN 10253
• DIN Standards
• GB/T 12459
• GB/T 13401
Applications
Concentric Reducers are widely used in:
• Oil & Gas Pipeline Systems
• Petrochemical Plants
• Chemical Processing Facilities
• Power Generation Projects
• Water Supply & Water Treatment Systems
• HVAC Systems
• Industrial Process Piping
• Shipbuilding Industry
• Food & Beverage Processing
• Pharmaceutical Manufacturing
Typical Uses
• Straight Pipeline Diameter Transitions
• Equipment Inlet and Outlet Connections
• Liquid and Gas Transportation Systems
• Steam Distribution Networks
• Process Piping Systems Requiring Centerline Alignment
Installation Considerations
Proper Size Matching
The diameters of both ends should match the nominal sizes of the connecting pipes to ensure a secure and stress-free installation.
Pressure Rating Selection
Wall thickness and material grade should be selected according to the operating pressure and applicable standards such as ASME B16.9 or GB/T 12459.
Material Compatibility
The reducer material should be compatible with the pipeline material to prevent corrosion and ensure long-term reliability.
Welding Requirements
When welded to pipelines, proper alignment and full-penetration welds are recommended. Pressure testing should be performed after installation to verify leak-tight performance.
Why Choose Haiyuan Concentric Reducer
✔ Factory Direct Supply
✔ Strict Quality Control
✔ Complete Size & Material Range
✔ Customized Manufacturing Available
✔ Competitive Pricing
✔ Fast Delivery
✔ International Standard Compliance
✔ Professional Export Service