Eccentric Reducer
The core purpose of eccentric reducers is to achieve a smooth eccentric transition between different pipe diameters in horizontal pipelines. By utilizing a single-sided flat structure, they thoroughly solve the industry pain points of conce
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- Eccentric reducer, also known as eccentric reducing fitting
- is a lateral offset reducing pipe fitting for piping systems
- The greatest advantage is a straight edge on one side and a high-low offset transition
- Effectively solves industry problems such as gas accumulation, liquid accumulation, sedimentation and blockage in horizontal pipelines, and cavitation at the pump inlet. The product adopts hot-press integrated molding or precision rolled an
- Uniform pipe wall, smooth taper, smooth flow channel, and no welding defects
Detailed Introduction
The eccentric reducers we produce differ from the centered conical structure of concentric reducers by adopting a design with one side flat and straight and the other side eccentrically contracted. It connects two horizontal pipes of different diameters, and while achieving pipe diameter transition and adjusting medium flow velocity, it avoids gas accumulation, liquid accumulation, and sediment deposition in horizontal pipes. The products are manufactured according to standards such as GB/T12459, GB/T13401, ASME B16.9, SH/T3408, HG/T21635, etc., covering full diameter, full pressure, and full material series. The overall forming is uniform, the flow channel is smooth, and the pressure resistance and sealing performance are stable. According to working conditions, it is divided into two forms: flat-top eccentric and flat-bottom eccentric. Flat-top is mostly used for pump inlets to prevent cavitation, and flat-bottom is mostly used for sewage pipelines to prevent sedimentation. We support non-standard customization and multiple material options. Welcome to contact us to confirm specific configurations and quotations.
- One side flat and straight, one side eccentrically contracted structure, specially designed for horizontal pipe diameter reduction, avoiding gas accumulation and liquid accumulation
- Provides two forms: flat-top eccentric and flat-bottom eccentric, respectively corresponding to pump inlet anti-cavitation and sewage pipeline anti-sedimentation
- Manufactured according to domestic and international standards such as GB/T12459, ASME B16.9, SH/T3408, HG/T21635, etc.
- Covers full diameter, full pressure, and full material series, supporting materials such as carbon steel, stainless steel, alloy steel, etc.
- Supports customization requirements such as non-standard eccentricity, special structures, special wall thicknesses, special anti-corrosion, etc.
- Conventional national standard and American standard stock specifications support ordering from 1 piece. Conventional stock specifications are shipped within 24 hours after payment confirmation.
| Product Name | Eccentric Reducer |
| Categories | Contact Us to Confirm |
| Customization | Our factory has comprehensive eccentric reducer customization capabilities, which can solve the installation problems where standard pipe fittings cannot adapt to special process pipelines, and supports comprehensive personalized customization of structure, size, material, process, and anti-corrosion. We can customize non-standard eccentricity, special flat-top and flat-bottom structures, unconventional diameter reduction ratios, long and short non-standard tapers, and thickened high-pressure wall thickness eccentric reducers as needed, adapting to special equipment connections, special process pipelines, and old pipe network renovations. Supports customization of special materials such as carbon steel, stainless steel, alloy steel, duplex steel, heat-resistant steel, etc., meeting harsh working conditions such as high temperature, high pressure, strong corrosion, and seawater salt spray. Can customize special bevels, special end faces, and extended-length integrated eccentric pipes, adapting to imported equipment, foreign-funded projects, and overseas non-standard standards. Supports sandblasting and rust removal, hot-dip galvanizing, cold plating |
| MOQ | Our factory's eccentric reducers adopt a flexible and loose minimum order mechanism, fully adapting to various procurement scenarios such as sample purchases, sporadic replenishment, engineering bulk orders, and full foreign trade orders, greatly lowering the procurement threshold for customers. Conventional national standard and American standard in-stock specifications support ordering from 1 piece with no quantity restrictions, suitable for engineering emergency repairs, pipeline renovation replenishment, equipment trial samples, and small project supporting procurement. Market common general specifications |
| Lead Time | Our factory has professional eccentric reducer production lines and large in-stock warehousing, with sufficient production capacity, stable inventory, and precisely controllable delivery times, fully guaranteeing domestic engineering schedules and foreign trade shipping deadlines. Conventional standard in-stock specifications are shipped quickly within 24 hours after payment confirmation, meeting emergency repair, urgent order replenishment, and expedited sample needs. Market common conventional specifications for bulk orders have mature processes and fast production scheduling |
| Packaging | Eccentric reducers all adopt export-grade standardized protective packaging, suitable for domestic long-distance logistics, container ocean shipping, and foreign trade export transportation, with full-process rust prevention, moisture prevention, collision prevention, and deformation prevention. Products are uniformly cleaned before leaving the factory, and industrial anti-rust oil is evenly applied to the surface, isolating air and moisture, preventing oxidation, rusting, and surface corrosion during transportation and storage. Small-diameter products are equipped with special plastic protective caps at both ends, sealing the pipe openings, protecting the bevels, and preventing dust and debris from entering the pipe, avoiding damage to installation and docking precision. Medium and large diameter pipe fittings are wrapped entirely with waterproof stretch film to prevent friction scratches, paint wear, and port deformation. Conventional specifications use thickened woven bags and hard cardboard boxes for independent packaging, while large-volume and large-diameter products use solid wood pallets for reinforced packing, firmly bound and evenly stressed |
| Reference Price | Inquiry |
| Standards | GB/T12459, GB/T13401, ASME B16.9, SH/T3408, HG/T21635 |
Applications
- Horizontal process pipeline reducers for industrial applications such as petroleum refining, fine chemicals, thermal power, and natural gas transmission
- Horizontal inlet and outlet pipeline connections for equipment such as pump units, compressors, and heat exchangers, with flat-top structure preventing cavitation
- Municipal pipeline projects such as urban sewage discharge, rainwater pipe networks, municipal water supply and drainage, and heating return water
- Horizontal pipelines for industrial wastewater treatment, environmental protection pipelines, and media containing particulate impurities, with flat-bottom structure preventing sedimentation and blockage
- Supporting procurement of pipe fittings for foreign trade B2B procurement and overseas engineering contracting projects
Overview
Eccentric reducers, commonly known as eccentric reducing pipe fittings, are pipe fittings used for diameter reduction in horizontal pipelines in industrial piping systems. They adopt a structure with one side straight and the other side eccentrically tapered, connecting two horizontal pipes of different diameters. While achieving smooth transition of pipe diameter, regulating medium flow velocity, and balancing pipeline pressure, they avoid problems such as gas accumulation, liquid accumulation, sediment deposition, and gas lock and cavitation in horizontal pipelines. Products are manufactured according to standards such as GB/T12459, GB/T13401, ASME B16.9, SH/T3408, HG/T21635, etc., covering full-diameter, full-pressure, and full-material series. According to working conditions, they are divided into two forms: flat-top eccentric and flat-bottom eccentric. Flat-top is mostly used for pump inlets to prevent cavitation, and flat-bottom is mostly used for drainage pipelines to prevent sedimentation.
Key Features
The core advantage of eccentric reducers lies in the structural design of one side straight and high-low offset transition. The flat-top eccentric structure is used for horizontal pipelines at the inlets of water pumps and compressors, which can discharge air inside the pipe and reduce cavitation and gas lock; the flat-bottom eccentric structure is used for sewage, wastewater, and particle-containing medium pipelines, maintaining a flat and continuous pipe bottom to reduce sedimentation and accumulation. Products adopt hot-pressed integrated molding or precision roll-welded processes, with uniform pipe walls, smooth taper, and smooth flow channels. We support customization of non-standard eccentricity, special diameters, special wall thicknesses, special anti-corrosion, and extended non-standard structures, and can produce both large and small batches.
Applications
Eccentric reducers are specifically used for horizontally laid pipeline systems. In industrial fields, they are used in horizontal process pipelines, pump unit inlet and outlet pipelines, condensate transportation systems, and drainage and vent pipelines for projects such as petroleum refining, fine chemicals, thermal power, natural gas transportation, and coal chemical industry. In municipal infrastructure fields, they are used in urban sewage discharge, rainwater pipe networks, municipal water supply and drainage, heating return water, and gas horizontal transportation pipeline projects. In equipment supporting aspects, they are used for horizontal inlet and outlet diameter reduction connections of equipment such as water pump units, heat exchangers, reactors, and compressors. They are also suitable for plant circulating water pipelines, environmental protection sewage treatment pipelines, mining fluid transportation, and ship horizontal pipeline systems.
Specifications
Eccentric reducers are manufactured according to standards such as GB/T12459, GB/T13401, ASME B16.9, SH/T3408, HG/T21635, etc., covering full-diameter, full-pressure, and full-material series. Connection forms include butt welding BW, socket welding SW, threaded NPT/BSPT, grooved clamp, and flange type, etc. Optional materials include carbon steel (20#, Q235B, A234 WPB), stainless steel (304, 304L, 316L, 321), alloy steel, duplex steel, and heat-resistant steel, etc. For specific diameter, wall thickness, eccentricity, and material configuration, please contact us for confirmation.
Procurement & Delivery
Conventional national standard and American standard in-stock specifications support ordering from 1 piece, suitable for engineering emergency repairs, pipeline modification material supplementation, and equipment trial samples. Conventional standard in-stock specifications are shipped within 24 hours after payment confirmation. For batch order production schedules, please contact us for confirmation. Products adopt export-grade standardized protective packaging, are cleaned and coated with industrial anti-rust oil before leaving the factory, small diameters are equipped with plastic protective caps, medium and large diameters are wrapped with waterproof stretch film, conventional specifications are packed in thickened woven bags or hard cartons, and large-batch products are reinforced with solid wood pallets. Chinese and English shipping marks, specification labels, and batch numbers can be customized according to requirements.
Service & Support
We provide full-chain services before, during, and after sales. Before sales, we can assist with working condition analysis, pipeline selection, and flat-top/flat-bottom structure recommendations to help confirm parameter matching. During sales, dedicated personnel follow up on orders and synchronize production progress and shipping information. Products undergo quality inspection screening before leaving the factory. After sales, products with their own quality problems are unconditionally returned or exchanged; for quality problems such as material, dimensions, processes, and welding defects, we bear the freight and provide free replacement. We provide installation technical guidance and pipeline supporting consultation. Long-term cooperative customers enjoy priority production scheduling and priority shipping rights.
FAQ
How to choose between flat-top and flat-bottom eccentric reducers?
For pump inlets, suction pipelines, and gas pipelines, flat-top eccentric reducers are preferred to prevent gas accumulation and cavitation; for sewage, drainage, and horizontal pipelines containing particle media, flat-bottom eccentric reducers are selected to prevent bottom sedimentation and blockage. For specific selection, you can contact us for assistance and confirmation.
Which pipelines are eccentric reducers suitable for?
Mainly used for horizontal pipelines, pump inlets and outlets, sewage discharge lines, and process medium pipelines, it is a reducer fitting dedicated to horizontal pipelines and can effectively solve the problems of liquid accumulation and gas accumulation.
Do you support non-standard customization?
We support customization of non-standard eccentricity, special diameters, special wall thicknesses, special anti-corrosion, and extended non-standard structures, and can produce both large and small batches. Please provide drawings or samples, and we will assist with confirmation.
Can you provide quality inspection documents?
We can provide certificates of conformity, material certificates, spectral reports, flaw detection reports, and dimensional inspection reports, and support third-party re-inspection. For specific document requirements, please contact us for confirmation.
Can it be exported?
The product standards are compliant, and the export packaging meets standards. We can customize Chinese and English shipping marks, specification labels, and batch numbers according to requirements, making it convenient for overseas customs clearance and warehousing classification.
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