Do you support customization for non-standard sizes and special operating conditions?

We support customization for any non-standard reducing ratio, non-standard overall length, special flange connection dimensions, and eccentric height difference. We can also customize lining materials such as butyl rubber, EPDM, high wear-resistant specialty rubber, and neoprene as needed, as well as processes such as 3–10mm thickened rubber lining, secondary vulcanization reinforcement, inner wall polishing pretreatment, and outer wall heavy-duty anti-corrosion coating. Please provide drawings or operating condition parameters, and we will assist in confirming the solution.

Rubber-lined anti-corrosion reducer

Name: Rubber-lined anti-corrosion reducer
SKU: 22b14193-7e7f-4f31-8d1e-cc690ca8facb

Rubber-lined anti-corrosion reducers are mainly used for pipe diameter transition in highly corrosive, highly abrasive, solid-particle-containing slurry pipelines, solving the engineering pain points of ordinary carbon steel and stainless s

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The core advantages of rubber-lined anti-corrosion reducing pipes are integrated steel-rubber composite, dual effects of corrosion resistance and wear resistance, zero leakage, anti-scaling, maintenance-free, and extremely high cost-effecti
It is the optimal replacement product for industrial strongly corrosive reducing pipelines. The outer carbon steel shell has strong rigidity, stable pressure bearing, and is not easy to deform
Meets industrial pipeline pressure-bearing requirements
The inner high-temperature vulcanized rubber is dense and seamless, with extremely strong adhesion, no bubbles and no delamination
It can isolate acid-base media, chloride ions, and particle slurry from direct contact with the metal substrate

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Detailed Introduction

Guojie rubber-lined anti-corrosion reducer is used for the smooth transition of large and small pipe diameters in pipeline systems, solving the problems of ordinary carbon steel and stainless steel reducers being prone to corrosion perforation and erosion wear under acid-base and particle-containing slurry working conditions. The outer layer of the product is a Q235B or 20# carbon steel welded shell, and the inner layer is high-temperature vulcanized rubber. The rubber layer is dense and seamless, which can isolate acid-base media, chloride ions and particle slurry from direct contact with the metal substrate. The structure is divided into concentric type and eccentric type: the concentric type is mostly used for vertical risers and desulfurization main pipelines to ensure stable vertical medium transportation; the eccentric type is mostly used for horizontal pipelines, keeping the pipe bottom flush and reducing sediment crystallization deposition. The nominal diameter covers DN25 to DN1000, supports non-standard diameter reduction customization, and pressure ratings include PN6, PN10, and PN16. Ordinary rubber is suitable for -20℃ to 85℃, and special temperature-resistant rubber can reach 120℃. Before leaving the factory, it undergoes spark testing, appearance inspection, and pressure leak testing.

Steel-rubber composite structure: the outer carbon steel shell provides stable pressure bearing, and the inner high-temperature vulcanized rubber isolates acid-base, chloride ions, and particle slurry, reducing the risk of corrosion perforation of the metal substrate.
Two structures are available: concentric and eccentric: the concentric type is suitable for vertical risers and desulfurization main pipelines, while the eccentric type is suitable for horizontal pipelines and keeps the pipe bottom flush, making it easy to select according to the pipeline route.
Clear coverage of diameter and pressure: nominal diameter DN25 to DN1000, pressure ratings PN6, PN10, PN16, and support for non-standard diameter reduction customization of any size reducer.
Rubber lining process parameters are verifiable: high-temperature integral vulcanization, rubber layer adhesion ≥3MPa, spark leak detection at 3000V to 5000V with no breakdown, and spark test reports and rubber lining quality acceptance documents are provided before leaving the factory.
Low minimum order threshold: MOQ for conventional standard specifications is as low as 1 piece, and a single piece can be produced and shipped, suitable for sporadic technical modifications, project replenishment parts, and engineering small samples.
Conventional models are delivered relatively quickly: DN50 to DN600 conventional concentric and eccentric, standard 3 to 5mm rubber lining, ordinary natural rubber and EPDM conventional models are in stock, and shipment can be made within 3 to 5 working days after order confirmation.

Product Name	Rubber-Lined Anti-Corrosion Reducer
Product Categories	Reducer
The parameters of this series of rubber-lined anti-corrosion reducers strictly follow the national anti-corrosion pipeline specifications HG21501 and DL/T1851, and are suitable for industrial anti-corrosion engineering design and acceptance standards nationwide. Nominal diameter range DN25–DN1000, support for non-standard diameter reduction customization of any size reducer; structures are divided into concentric type and eccentric type; pressure ratings PN6, PN10, PN16	Ordinary rubber: -20℃ to 85℃; special temperature-resistant rubber can reach 120℃, suitable for normal-temperature and medium-to-low-temperature corrosive working conditions. The shell material is Q235B and 20# carbon steel welded and formed, with a dense structure and stable pressure-bearing performance. The process adopts high-temperature integral vulcanization, the adhesive layer adhesion is ≥3MPa, and the spark leak detection at 3000V–5000V shows no breakdown. Suitable media: acid-base solutions, desulfurization slurry, ore slurry, brine, and sewage containing particulate corrosive media. Before leaving the factory, it undergoes spark testing, appearance inspection, and pressure leak testing, and the anti-corrosion performance and structural strength all meet the standards.
Customization	This factory possesses full-dimensional non-standard customization and working-condition upgrade capabilities for rubber-lined anti-corrosion reducing pipes, and can undertake customized orders for various special sizes, special rubber types, special thicknesses, and special medium working conditions, adapting to the transformation needs of complex industrial anti-corrosion pipelines. It supports customization of arbitrary non-standard reducing ratios, non-standard total lengths, special flange connection dimensions, and eccentric height differences, adapting to non-standard interfaces of old pipeline networks and special docking ports of equipment. Different functional rubber lining materials can be customized on demand, including strong-acid-resistant butyl rubber, high-and-low-temperature-resistant EPDM, high-wear-resistant special rubber, and oil-resistant neoprene, to specifically match different working conditions of acid and alkali, high temperature, wear, and salt corrosion. It supports 3–10mm thickened rubber lining reinforcement, secondary vulcanization reinforcement, inner wall polishing pretreatment, and outer wall heavy-duty anti-corrosion spray coating upgrade processes, enhancing overall anti-corrosion
MOQ	Our factory's rubber-lined anti-corrosion reducer adopts a flexible low-threshold minimum order model, suitable for various procurement needs such as industrial sporadic technical upgrades, project spare parts, engineering small samples, and batch matching. The MOQ for conventional standard specifications is as low as 1 piece, and a single piece can be produced and shipped, with no minimum order quantity restriction, no specification threshold, and no rubber type restriction. Conventional DN50–DN600 concentric and eccentric standard sizes, conventional 3m
Lead Time	The factory has established a dedicated vulcanization production line for anti-corrosion rubber lining and a constant-temperature warehouse for finished products, and regularly stocks hot-selling conventional rubber-lined reducers on the market, quickly responding to the construction milestone needs of environmental protection, chemical, and power engineering projects. DN50–DN600 conventional concentric and eccentric, standard 3–5 mm rubber lining, ordinary natural rubber, and EPDM conventional models are in ample stock, and orders can be shipped within 3–5 working days after confirmation.
Packaging	The rubber-lined anti-corrosion reducer adopts dedicated protective packaging for industrial anti-corrosion pipe fittings, focusing on protecting the internal rubber lining from impact, scratches, aging, and detachment, and preventing transportation damage from affecting anti-corrosion performance. Before the finished product leaves the factory, the internal rubber layer is first subjected to dust-free cleaning and anti-aging sealing treatment, and hard plastic sealing caps are installed at both ends of the pipe opening to completely seal the pipe opening, preventing sand, stones, and debris from entering and preventing the rubber layer from being scratched or impacted. The outer surface of the pipe fitting is treated with anti-rust spraying, and the whole is wrapped with thickened waterproof winding film and a shock-absorbing bubble layer to avoid paint loss from friction and deformation from impact during transportation. Small and medium-sized specifications are individually packaged and labeled by category; large-diameter reducers use solid wood pallets for fixation, flexible straps for reinforcement, and full-coverage protection with anti-collision corner guards at the edges and corners to prevent the rubber layer from delaminating due to vibration during long-distance transportation. All products are classified by specification and rubber
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Applications

Power desulfurization engineering: in flue gas desulfurization slurry transportation pipeline networks, denitrification waste liquid pipelines, and acid-base circulation systems of thermal power plants and cogeneration plants, used for diameter-reducing transitions that withstand continuous erosion and corrosion by gypsum slurry.
Chemical and pharmaceutical: In fine chemicals, pharmaceuticals, acid-base-salt solution transportation, and corrosive waste liquid discharge pipelines, replace ordinary metal pipe fittings to reduce chemical corrosion perforation.
Mining and metallurgy: In pipelines for mine flotation slurry, tailings slurry, and metallurgical pickling wastewater, used for pipe diameter reduction to resist solid particle wear and mine water corrosion.
Municipal and industrial park wastewater: In large wastewater plants, industrial park wastewater pipe networks, and reducing pipelines for acid-base wastewater treatment, it adapts to long-term microbial corrosion and water quality fluctuations.
Salt industry and new energy: In brine transportation, brine circulation pipe networks, and saline wastewater transportation systems, it is used for salt-corrosion-resistant pipe diameter transitions.
Old pipe network renovation and technical transformation: In old corroded pipe network renovation, anti-corrosion pipeline technical transformation, and new construction projects of special pipelines for industrial acid-base media, it replaces metal reducers with fast corrosion, high wear, and high leakage rates.

Procurement & Delivery

For conventional standard specifications, MOQ is as low as 1 piece, and a single piece can be produced and shipped, with no minimum order quantity restriction. DN50–DN600 conventional concentric and eccentric, standard 3–5mm rubber lining, ordinary natural rubber and EPDM conventional models are in stock, and can be shipped within 3–5 working days after order confirmation; for other specifications and customized models, please contact us to confirm the delivery time. Packaging is carried out according to the protection requirements for industrial anti-corrosion pipe fittings: the inner layer undergoes dust-free cleaning and anti-aging sealing protection, pipe ends are fitted with hard plastic sealing caps, the outer surface is anti-rust sprayed, and the whole is wrapped with thickened waterproof winding film and shock-absorbing bubble layer; small and medium specifications are individually packaged in single pieces, while large diameters use solid wood pallets for fixation, flexible straps for reinforcement, and corner anti-collision protectors. Each batch is accompanied by a factory certificate of conformity, spark test report, and rubber lining quality acceptance documents.

Service & Support

Before sale, we provide working condition analysis, media matching, rubber type selection, pressure and temperature verification, and assist in confirming the rubber lining material and thickness. During sale, we synchronize the progress of welding and forming, sandblasting, high-temperature vulcanization, spark testing, and finished product acceptance, together with acceptance and testing documents. After sale, we provide an 18-month warranty period. During the warranty period, for quality problems such as rubber layer delamination, blistering, cracking, leakage, and anti-corrosion failure caused by non-human installation damage, we will redo and reship free of charge and bear the round-trip logistics losses. We are equipped with a 24-hour anti-corrosion pipeline technical team to provide on-site installation guidance, pipeline anti-corrosion system commissioning, working condition optimization, and troubleshooting services. If you need selection or a quotation, please contact us and provide the medium, temperature, pressure, diameter, and quantity.

FAQ

How to choose between concentric and eccentric rubber-lined reducers?

For vertical pipelines, riser main lines, and desulfurization main lines, the concentric type is preferred, as the medium transportation is stable and the resistance is uniform; for horizontal pipelines, working conditions that need to prevent material accumulation and deposition, and bottom leveling, the eccentric type is selected, which can reduce slurry and sediment accumulation and blockage. If the pipeline route is complex, you are welcome to contact us for assistance in confirmation.

What media are different rubber linings respectively suitable for?

Natural rubber is suitable for general weakly acidic and weakly alkaline wastewater; butyl rubber has stronger resistance to strong acid corrosion; EPDM is resistant to high and low temperatures and aging; special wear-resistant rubber is suitable for high-particle erosion slurry working conditions. The specific rubber type needs to be confirmed in combination with medium concentration, temperature and particle content. Please contact us to provide working condition parameters.

Will the rubber lining layer fall off or leak?

The product adopts an integral high-temperature vulcanization process, the rubber layer adhesion is ≥3MPa, and it undergoes 3000V–5000V spark leak detection without breakdown before leaving the factory. Under normal installation and use conditions, the rubber layer is tightly bonded to the steel shell. During the warranty period, for problems such as delamination, blistering, cracking, and leakage caused by non-human installation damage, we will redo and reship free of charge.

What are the delivery time and minimum order quantity for conventional specifications?

The MOQ for conventional standard specifications is as low as 1 piece, and a single piece can be produced and shipped. DN50–DN600 conventional concentric and eccentric, standard 3–5mm rubber lining, ordinary natural rubber and EPDM conventional models are in stock, and can be shipped within 3–5 working days after order confirmation. For non-standard customization or special rubber types, please contact us to confirm the delivery time.

Do you support non-standard sizes and special working condition customization?

We support customization of any non-standard reducing ratio, non-standard total length, special flange connection dimensions and eccentric height difference, and can also customize lining materials such as butyl rubber, EPDM, high wear-resistant special rubber, and neoprene according to needs, as well as processes such as 3–10mm thickened rubber lining, secondary vulcanization reinforcement, inner wall polishing pretreatment, and outer wall heavy-duty anti-corrosion coating. Please provide drawings or working condition parameters, and we will assist in confirming the solution.

What information is required to provide a quotation?

Please provide the medium type, concentration, temperature, pressure rating, nominal diameter, concentric or eccentric, connection standard, quantity, and whether there are special rubber compound or thickness requirements. The more complete the information, the faster we can provide an accurate quotation and selection recommendation.

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