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ceramic lined pipe


Ceramic lined pipe is made through self-propagating high-temperature synthesis (SHS) technique. Hoop strength is the resistance against radial pressure. The strength of the ceramic -lined steel composite pipe is 300 to 500MPa.
Self-propagating High-temperature Synthetic process
Self-propagating high temperature synthesis (SHS) is used to describe a process in which the initial reagents (usually powders), when ignited, spontaneously transform into products due to the exothermitic heat of reaction.

 Ceramic lined pipe properties

 A small amount of iron also remains in the ceramic layer. There is a thin equiaxed grain area of alumina near the steel pipe wall, and then alumina was grown in form of dentrite to the surface of ceramic layer.

 Advantages of ceramic lined pipe

 Ceramic Liner Composite pipe is a high technology production technology-self-fuel high temperature clutch synthesis method. 

 1. Good abrasion resistance

 Ceramic lined pipe due to the inner lining of corundum ceramic (A-al2o3), the Mo hardness of up to 9.0 of the equivalent HRC90. Therefore, the metallurgical, electric power, mining, coal and other industries to transport the grinding medium has high wear resistance. The industrial operation confirms that its wear-resisting life is 10 times times or even dozens of times times that of quenched steel.

 2. Small Operation resistance

 corundum ceramic wear-resistant tube in the inner surface of smooth, and never rust, nor like seamless steel tube inside the surface has convex spiral. After testing the internal surface roughness and water resistance characteristics of the testing units, the smoothness of the inner surface is superior to any metal pipe, the resistance coefficient is 0.0193, slightly lower than the seamless pipe.

 3, corrosion resistance, anti-scaling

 Because the steel ceramic layer is (A-al2o3), it is a neutral trait. Therefore, with acid and alkali resistance and seawater corrosion, and at the same time with anti-scaling and other characteristics.
4. High temperature resistance and heat-resisting performance

 The corundum ceramic (A-al2o3) is a single stable crystalline structure. Therefore, the composite pipe can operate in the -50--700℃ temperature range for a long time. Material linear expansion coefficient 6-8x10-6/0c, about 1/2 of steel pipe.

 5. Low construction cost

 corundum ceramic wear-resistant tube light weight, the price is suitable. The casting pipe with the same inner diameter is lighter than 50% and lighter than that of the wear-resistant alloy tube 20–30%.

 6. Convenient installation and construction

 Because of the light weight of the tube, and good welding performance. Therefore, welding, flange, rapid connection and so on, construction and installation is convenient.
7. Ceramic lined pipe with the traditional steel pipe, wear-resistant alloy cast steel pipe, cast stone pipe as well as steel plastic, steel rubber pipe, etc. have essential differences. The outer layer of ceramic steel pipe is steel, and the inner is corundum. The Vickers hardness of corundum layer is as high as 100-1500 (Rockwell hardness is 90-98), which is equivalent to tungsten cobalt hard gold. The wear resistance is more than 20 times times higher than carbon steel pipe, it is superior to the corundum grinding wheel which is usually bonded.

 Ceramic-lined carbon steel pipe


Sand injection test30% Transfer test of sludge with SiO2
MaterialVolume diminution
(cm3)		MaterialVolume diminution
(cm3)
Ceamic lining
Steel pipe		0.0022Ceamic lining
Steel pipe		3
Ceramic pipe
Al2O397%		0.0025S45C25
The combination of high rigidity of ceramic and high elasticity of steel gives the pipe unmatchable features as an abrasion resistant, heat resistant and corrosion resistant material for use in the fields of power generation, metallurgy, mining, and chemical industry etc.. It has many advantages over steel pipes, cast stone pipes, and steel-plastic compound pipes.

Usage of Ceramic Lined pipe

The ceramic lined pipe transport has been widely used in the industries of electric power, metallurgy, coal, petroleum, chemical engineering, building materials, mechanism and so on.
Abrasion resistant elbow
The ceramic lined elbow throughout the power, metallurgy, coal, petroleum, chemical, building materials, machinery and other industries, and high-speed development. When lining the wear-resistant ceramic elbow to deliver high grinding material (such as ash, coal, ore powder, etc.), there is a lining of wear-resistant ceramic elbow wear fast, especially the elbow Wear faster. When lining a The ceramic lined elbow to deliver a highly corrosive gas, liquid or solid, there is a problem that the lined wear-resistant ceramic elbow is corroded and is quickly damaged.
There is a problem that it is expensive to use a heat-resistant steel pipe when the material having a higher temperature is conveyed in the lining of the wear-resistant ceramic elbow. After lining the wear-resistant ceramic elbow, these problems are solved.
The ceramic lined elbow is widely used in wear and tear of the mine filling material, ore powder and tailings transport, coal-fired power plant powder, smelting, ash and other lined with wear-resistant ceramic elbow is also very appropriate.
The ceramic lined pipe, Elbows, Reducer, Tees and others manufactured in our factory have been used in over 200 thermal power plants, more than 50 mines and the industries of coal, building materials, mechanism, petroleum and so on.

Specifications & size range of ceramic lined pipe


Hoop strength is the resistance against radial pressure. The strength of the ceramic -lined steel composite pipe is 300 to 500MPa.
Wear-resisting comparative table of ceramic lining pipe
Abrasion
Ceramic layer Ceramic Lined Reducer Pipe with flange reducer Al2O3 content greater than 89% , micro-hardness HV1000-1500, which has a high abrasion resistance, wear resistance than ten times higher than carbon steel after quenching , superior tungsten carbide drill.
Application range
  • coal pulverizing system of power plant pipeline, including, powder transmission pipeline, thick powder separator pipeline, coal drop pipe, combustion system of a wind pipe, a secondary air pipe, three pipeline and burner pipelines, in addition to ash slagging system the discharge pipe, powder pipe, dry ash conveying pipe;
  • iron and steel plant raw material conveying pipeline, collecting pipe, dust pipe, ash pipe, ash pipe, mixing pipe, grinding export pipeline, coal pipeline, coal pipeline, separator pipe, burner radius pipe, etc.;
  • cement plant selection machine outlet pipe, choose machine inlet pipe, pipe dust pipe, vertical mill outlet pipe, circulating air duct, high temperature air blower, lower material pipe, etc.;
  • petroleum, chemical, mining, coal, coal washing plant, smelting, paper, aluminum, building materials, powder engineering, food machinery and other processing and conveying material pipe.
Corrosion
Ceramic materials are neutral , chemically stable , has excellent corrosion resistance and acid resistance , resistant to various inorganic acids, organic acids , organic solvents , and its degree of corrosion of stainless steel is more than ten times.
Temperature
Temperature above 2000celsius degree, long-term work in the range of -50 -900 celsius degree.
Easy welding
Ceramic adjustable tube can be welded , flanged , flexible connectors and other fast way links , very easy to install.
Clean and easy maintenance
Smooth wall, can prevent scaling , fouling, self-cleaning function. Tightness.
Remarks:
  • Under the direction of the arrow diagram for the export direction. 
  • Bend radius is usually 1.5-5 times the diameter of steel pipe (1.5-5D). 
  • Othe specifications of the compsite pipe can be manufactured accord to the user requirments. 
  • The weight is caculate by theoretics, maybe have some tolerance, the real weight will be weigh in afer them finished.
Hoop strength is the resistance against radial pressure. The strength of the ceramic -lined steel composite pipe is 300 to 500MPa.

Features and Advantages of ceramic lined pipe

Ceramic Liner pipe is a high technology production technology-self-fuel high temperature clutch synthesis method.
1). High Abrasion Resistant:
Vickers hardness of the corundum lining is HV1100 to1500, as high as that of tungsten-cobalt hard alloys, and the abrasion resistance is 20 times as carbon steel pipes. The composite ceramic lined steel elbow was used in a mining plant for about fifty thousands hours. The general service life of common steel elbow is about 700 hours.
2). Corrosion Resistant:
Corundum is a neutral material, and is acid-proof and fouling -free.
3). Heat Resistant:
Ceramic lined composite steel pipe can work under circumstances of -50 to 800 Celsius degree .
4). Lower Weight and Convenient Installation:
The ceramic lined steel pipes are lighter than alloy pipes, cast iron pipes, and cast stone pipes and can be welded or connected through flanges, which reduces the expense of transportation and makes the pipes easier to install.
For the pipes with the same sizes, types and length, the weight of ceramic pipe is about 1/2 of the wearable cast alloy steel pipe's, while the cost has reduced 10%~20% per meter.
The weight of ceramic lined steel pipe is about 1/3 of the cast stone bent pipe's, 1/2 of the cast stone straight pipe's.
Main Properties of Ceramic lined pipe
ItemIndex
Content of Alumina≥85%
Density≥3.5 g/cm3
Rockwell Hardness≥80 HRA
Impact Strength≥850 Mpa
Bending Strength≥290MPa
Breaking Temper≥4.8MPa m1/2
Coefficient of Linear Thermal Expansion20W/m.K
Ceramic (Corundum: a-Al2O3) lined abrasion resistant straight pipe and fittings are lined with highly abrasion resistant ceramic by SHS -------Self-propagating High-temperature Synthetic process.
  • The ceramic-lined steel composite pipe can be joined by welding the steel pipe layer.
  • Ceramic lined pipes can take place of expensive stainless steel, titanium, nickel, cast stone or alloy pipes.
  • Extended service life can also reduce maintenance cost.

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