Product Name: Eccentric Reducer
Product Type: Butt Weld Pipe Fitting – Eccentric Reducer
Size Range: DN15 (1/2") – DN3600 (144")
Wall Thickness: SCH 10 – SCH XXS (as required)
Manufacturing Process: Hot Forming / Cold Forming + Heat Treatment
Connection Type: Butt Weld
Application: Pump Suction Lines, Oil & Gas Pipelines, Petrochemical Plants, Power Generation, Water & Process Systems
Inspection: Dimensional Inspection, PMI, UT, MT, RT (as required)
An eccentric reducer is a type of pipe fitting designed to connect pipes of different diameters while maintaining a flat side alignment (top or bottom).
It is primarily used in pump suction lines and horizontal pipeline systems to prevent air accumulation and ensure stable fluid flow.
Unlike concentric reducers, eccentric reducers help eliminate cavitation risks, reduce turbulence, and improve pump efficiency, making them essential components in liquid handling and critical pipeline systems.
• Prevents air pockets in pump suction lines
• Ensures smooth and stable fluid transition
• Reduces cavitation and vibration risks
• Improves pump efficiency and system reliability
• Ideal for horizontal and liquid-filled pipelines
| Specification | Range |
|---|---|
| Nominal Size | DN15 (1/2") – DN3600 (144") |
| Wall Thickness | SCH 10 – SCH XXS |
| Type | Eccentric (Flat Top / Flat Bottom) |
Eccentric reducers are suitable for medium to high-pressure pipeline systems requiring precise flow control and alignment.
Our eccentric reducers are manufactured in compliance with major international standards:
ASME / ASTM Standards
ASME B16.9
ASTM A234 / A350 / A403 / A420 / A860
European Standards
EN 10253-2 / EN 10253-3 / EN 10253-4
DIN 2609-1
Pipeline & Project Standards
MSS SP-75 / SP-95 / SP-97
API 5L
Chinese Standards
GB/T 12459
SH/T 3408 / SH/T 3410
GB/T 13401
Fully compatible with global pipeline systems and EPC project requirements.
We supply eccentric reducers in a wide range of materials to suit various service conditions:
ASTM A234 WPB / WPC
ASTM A350 LF2
ASTM A420 WPL3 / WPL6 / WPL8
ASTM A234 WP5 / WP9 / WP11 / WP22 / WP91
ASTM A860 WPHY 42 / 46 / 52 / 60 / 65 / 70
ASTM A335 P5 / P9 / P12 / P91
ASTM A403 WP304 / WP304L / WP316 / WP316L
ASTM A403 WP321 / WP347 / WP310
ASTM A815 S31803 / S32205 / S32750 / S32760
ASTM B366 (Inconel, Monel, Hastelloy)
ASTM B363 Titanium grades
All materials are supplied with Mill Test Certificates (MTC) and full traceability.
• Raw material inspection
• Hot or cold forming
• Heat treatment (normalizing / solution treatment as required)
• End beveling & machining
• Surface finishing
• Dimensional inspection & NDT
This process ensures uniform wall thickness, accurate dimensions, and excellent mechanical properties.
Each eccentric reducer undergoes strict inspection procedures:
• Dimensional inspection
• Chemical composition analysis
• PMI (Positive Material Identification)
• Ultrasonic Testing (UT)
• Magnetic Particle Testing (MT)
• Radiographic Testing (RT), if required
Ensuring full compliance with international standards and project specifications.
• Pump suction and discharge lines
• Oil & gas transmission pipelines
• Petrochemical and chemical processing plants
• Power generation systems
• Water treatment and desalination facilities
• Horizontal liquid pipeline systems
Eccentric reducers are the preferred solution where flow stability and pump protection are critical.
• Full size range up to DN3600 (144")
• Wide material selection for various service conditions
• Compliance with ASME, ASTM, EN, DIN, and GB standards
• Suitable for high-pressure and critical pipeline systems
• Reliable quality for long-term industrial applications
