Bimetallic composite pipe

The bimetallic composite pipe combines the strength, corrosion resistance and wear resistance of the base pipe and the outer pipe.
high chromium cast iron pipe

The bimetallic composite pipe is a new type of wear-resistant pipe developed by our factory.

The outer layer of the bimetallic composite pipe is made of ordinary steel pipe, and the the inner lining is compounded high chromium cast iron is formed through the casting process. The outer wall of the elbow adopts a hot simmering elbow, and the inner layer is cast with high chromium cast iron. Compared with the traditionally used wear-resistant alloy cast iron, wear-resistant alloy cast steel, steel-ceramic composite pipe and cast stone pipe, the pipeline has many advantages.


Because oil and natural gas contains a large amount of corrosive media such as hydrogen sulfide, carbon dioxide and chloride ions, especially the content of corrosive components in the oil and gas medium before pipeline purification in the seabed oil and gas field is high, and some even require heat transfer, and internal corrosion problems are very prominent. The use of stainless steel or corrosion-resistant alloys in large quantities is not economical. Double metal clad pipes are a good choice.

fittings break

In most cases, the biggest cost for a company is lost production time due to unplanned downtime. Effective use of suitable wear-resistant materials can reduce the frequency of unexpected shutdowns in the production process, extend production time, and reduce company costs.

The bimetal clad pipe structure uses a corrosion-resistant alloy tube (stainless steel or corrosion-resistant alloy) as the inner liner (wall thickness 0.5-3mm) to contact the corrosive medium and carbon steel or low-alloy steel as the outer base pipe to withstand the pressure.

rare earth alloy wear resistant high chromium cast iron pipes usage


  1. Power industry: raw coal system silos, hoppers, hoppers, powder feeding pipelines.
  2. Coal industry: heavy ore coal preparation pipelines in coal preparation plants, wet coal conveying systems, sediment backfilling in mining.
  3. Mining industry: mine filling, concentrate transportation, tailings transportation pipeline.
  4. Iron and steel industry: coke particle transportation pipeline, coal mill pipeline, separator, elbow, cone, separation baffle.
  5. Cement industry: coal powder transportation. Mineral powder transportation.
  6. Machinery industry: lining of equipment for pulverizing, dust removal and ash discharge systems of power plants, and lining of dust removal equipment in steel plants.
fittings install

Related products


In the production process of the bimetal wear-resistant pipeline, the straight pipe adopts casting technology. This technology is that the liquid wear-resistant metal material is fused to the surface of another metal to form a composite steel body after hot melting, achieving the purpose of true metallurgical bonding. The bonding layer The shear strength is higher than that of the body metal, which fully realizes the mechanical complementarity of the base layer and the wear-resistant layer; the elbow, tee, reducer and other pipe fittings adopt the lost foam vacuum suction casting compound process, which is advanced in technology and effectively solves the problem The problem of compounding, the elbow and various other special-shaped pipes can be integrated as a whole, without changing the flow trajectory of the material in the elbow, and greatly reducing the resistance of material transportation.

In the selection of material, the outer wall of the steel is made of carbon steel, which ensures that the wear-resistant tube has high mechanical strength and impact resistance; the wear-resistant layer of the lining is made of wear-resistant alloy steel series, which is mainly added with Cr-Ni-Mo -Cu-RE and other alloys, after quenching and tempering heat treatment process, make the alloy steel not only have strong wear resistance and corrosion resistance, but also have higher mechanical strength and impact resistance.

centrifugal casting bimetallic wear pipe equipment

Bimetal wear-resistant pipe products


Good wear resistance

Giving full play to the excellent wear resistance characteristics of high chromium casting (KMTBCr20Mo3CuRe). The wear layer is made of high complex alloy material. The macroscopic hardness can reach HRC55 or more. The structure contains a large amount of M7C3 type hard. Carbide, its micro-hardness is HV1500-1800, and its anti-abrasive and wear-resistance performance is more remarkable.

Good resistance to mechanical shock, thermal shock, wear and corrosion, and high temperature resistance

Since the matrix is ​​mainly composed of austenite and carbide, there is a large amount of Gr element in the solid solution, so it can be significant in corrosion or high temperature environments The bimetal wear-resistant elbow has good wear resistance, corrosion resistance and high temperature resistance.

High pressure bearing

Suitable for any pressure level. The inner lining is tightly combined with the outer steel pipe. The special process is adopted to form a weld between the composite layers to ensure operational reliability.

Convenient installation and connection

Flanges can be used, arbitrary cutting, welding, and good overall performance the bimetal composite wear-resistant pipe adopts ordinary steel pipe outside and high-end wear-resistant alloy inside, which forms a better metallurgical combination at the same time , It also gives full play to the wear resistance and corrosion resistance of high complex alloys and the good mechanical strength and impact resistance of ordinary steel pipes. It solves the contradiction between weldability and wear resistance that are difficult to reconcile with a single material. Able to achieve the best fit.

Well packing and delivery

The packaging method of the Cast basalt lined steel pipe usually includes a single bare package-container, wooden frame bundled packages, channel steel frame box.

single bare package
Single bare package
single bare package in container
Package in container
wooden frame bundled packages
I-beam frame bundled packages

channel steel frame box 1
Channel steel frame box
wooden cases
If customers have special requirements for packaging, they can be packed in wooden boxes.

Frequently Asked Questions


How long is your delivery time?

The delivery time of customized products is generally 25 35 days, and non customized products are generally shipped within 24 hours after payment.

What are your payment terms?

T/T 30% as the deposit,The balance payment is paid in full before shipment

What is your minimum order quantity?

There is no minimum order quantity requirement. Customized products are tailor made according to the drawings provided by the customer.

Do you provide samples? Is it free?

If the value of the sample is low, we will provide it for free, but the freight needs to be paid by the customer. But for some high value samples, we need to charge a fee.

What is the packaging and transportation form?

Non steaming wooden box and iron frame packaging. Special packaging is available according to customer needs. The transportation is mainly by sea.


As part of our quality regimen, 100% of incoming raw materials, semi-finished products, as well as finished products are thoroughly inspected prior to being entered into our inventory. We have established multiple hold points throughout fabrication as well as a comprehensive final inspection for all products.

Need to inquire about our products? Fill out the form below and our staff will be in touch!
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Why Do I Need Wear Parts?

“Wear” is the last thing any business wants to experience with their machines. Apart from its unpleasant physicality, it could also be a sign that means your parts and/or components are about to break. You need wear parts to help prevent or prolong the wearing out of these parts and components – and that could be any type of wear parts such as pipes, liners, plates, etc.

What Kinds of Wear Plates Do You Offer?

Here at Sunny Steel, we put emphasis to the primary kinds and types of wear pipes and fittings – they include:
  • Ceramic Liner pipes and fittings
  • Ceramic tile lined pipes and fittings
  • Ceramic sleeve lined pipes and fittings
  • Cast basalt lined pipes and fittings
All of them have their particular uses, but these cover almost all the materials companies need to work on.

Merits and Salient Features

  • Extremely High Resistant to Abrasion, Erosion and Corrosion.
  • Resistant to most of the Chemicals, Alkalis and Acids.
  • Very Long life
  • Less Down time and Maintenance Cost.
application of rare earth alloy wear resistant pipe

Thermal power stations – raw coal chutes/ hoppers, feed bunker/coal bunker, ash pits, crushers, bottom ash, disposal slurry, dust lines/ bends, pipeline/bends, fly ash. Trenches below hopper and pipelines, pulverized coal piping.

Cement plants – dynamic air separators, raw mill ducts/ chutes, drag chain conveyor, grate cooler housing, air separator/ cyclones, coal handling, coal hopper/ chutes, cement conveying, slurry lines/ bends lines/ bends, discharge boxes / bankers, lime/silica hoppers/chutes, chain conveyor housing, mixers/nozzles, coal ventury.

Steel plants – coke sorting unit, coal bunkers / sinter bunkers, lime bunkers, coke breeze, sinter plant cyclones, sinter plant flow conveyors, iron slurry line, thick slurry lines, air lift pipes, telescopic pipes, granulated slag, hot mill flume.

Coal washeries – coal washing plants, coal transportation, conveyor chutes/pipes, floatation cells, media sumps, centrifuges, cyclones, sieves.