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Ceramic-lined carbon steel pipe

Date:2018-07-17    View:1562      Tag:Ceramic-lined carbon steel pipe


There are essential differences between ceramic lined carbon steel pipes and conventional steel, wear-resistant alloy steel pipes, cast stone and plastic pipes, steel pipes and other rubber.


The ceramic tube is the corundum and the inner corundum. The hardness of corundum layer Vivtorinox is 1100-1500 (Rockwell hardness 90-98), equivalent to tungsten cobalt hard gold. The high wear resistance is 20 times higher than that of the carbon steel pipe. It is superior to the ordinary corundum grinding wheel. It is still a variety of corundum grinding wheel grinding hardened steel main wheel. The ceramic Guan Gangyu corundum wear layer can be picked up. The wear-resistant ceramic tube corundum layer can be formed mainly by a few millimeters thick, the Moir hardness is 9, second only to the diamond and the silicon carbide, all oxides, this is the highest hardness. Only about 20% of alumina, most of which are SiO2, SiO2 Moir hardness is 7. rare high chromium wear resistant alloy tube or Vivtorinox hardness is about 400 (Rockwell hardness is about 50), and the hardness of corundum is third. Therefore, the wear resistance of wear-resistant alloy steel pipe and casting pipe is a qualitative leap from the composition and structure, and the thickness of ceramic tube compared with them.


The ceramic lined carbon steel tube is made of SHS - centrifugal method to make the ceramic tube corundum melting point 2045 C. The corundum layer and the steel layer structure have special stress field because of the special cause of the process. The ceramic layer is subjected to compressive stress at room temperature, the steel layer is subjected to tensile stress, and the two opposite is formed by balancing the whole. Only when the temperature rises above 400 degrees C, due to the thermal expansion coefficient between the two, the new stress field and the original stress field produced by the thermal expansion of the ceramic tube are counteracted by each other, making the steel layer of the ceramic layer free balance. When the temperature rises to 900 degrees centigrade, the ceramic lined steel tube enters the water, the times of repeated soaking, the composite layer does not crack or crack, which shows the unrivalled thermal shock resistance of the common ceramics. This performance is useful in engineering construction, because its outer layer is steel, and the internal temperature will not break up in the structure of the flange. The blows can be welded directly to the welding method and can be connected, compared with wear and cast stone tubes, wear-resistant steel pipes, rare earth wear resistant steel, bimetal composite pipes, steel tubes, and steel pipes. The rubber tube is not easy to weld or weld better. The ceramic lined steel pipe has good mechanical impact resistance. At the same time, it will not break the composite layer when transporting, installing and beating two weight supports.


Ceramic lined carbon steel pipe has high wear resistance and resistance to fluid erosion. In the wind pipe, the wear rate of the pipe is the fastest, and the wear resistance of the ceramic lined steel pipe elbow is more than five times higher than that of the steel elbow. In practical application, the ceramic lined steel pipe has been observed and measured 1-2 years after opening the hole. The composite layer has no obvious wear or loss, the size of the unit and the length of the pipe are the same. The weight of the ceramic lined steel pipe is about 1/2 with the weight of the wear-resistant steel pipe or the double metal composite pipe. The construction cost is reduced by 30-40% per meter, and only the cast stone weight steel pipe is used. And rare wear resistant 2/5 around 20% per meter below the cost of the project. The cost of ceramic lined steel pipes is only a small part of stainless steel tubes and nickel titanium pipes when they are corroded or used in high temperature.




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. 
  • Size of Ceramic-Lined Composite Elbows 22.5 degree
  • Size of Ceramic-Lined Composite Elbows 45 degree
  • Size of Ceramic-Lined Composite Elbows 90 degree
  • Size of Ceramic-Lined Steel Composite Pipe (CLSP)
  • Size of Ceramic-Lined Composite Tee
Wear-resisting comparative table of ceramic lining pipe
Sand injection test 30% Transfer test of sludge with SiO2
Material Volume diminution
(cm3)
Material Volume diminution
(cm3)
Ceamic lining
Steel pipe
0.0022 Ceamic lining
Steel pipe
3
Ceramic pipe
Al2O397%
0.0025 S45C 25
Main Properties of Ceramic
Item Index
Content of Alumina ≥95%
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 Expansion 20W/m.K

Abrasion
Ceramic layer Ceramic Lined Reducer Pipe with flange reducer Al2O3 content greater than 95% , 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

1, 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;

2, 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.;

3, 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.;

4, 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:

1. Under the direction of the arrow diagram for the export direction. 
2. Bend radius is usually 1.5-5 times the diameter of steel pipe (1.5-5D). 
3. Othe specifications of the compsite pipe can be manufactured accord to the user requirments. 
4. 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.

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