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Ceramic-lined carbon steel pipe

Cearmic lined pipe elbows

Ceramic-lined carbon steel pipe with conventional steel, wear-resistant alloy steel pipe, cast stone and plastic pipe, steel pipe and other rubber has the essential difference.

Ceramic pipe is steel outer and inner corundum. Corundum layer Vickers hardness 1100-1500 (Rockwell hardness of 90-98), the equivalent of tungsten-cobalt hard gold. High wear resistance than carbon steel pipe more than 20 times, it is much more superior than the usual bonding together corundum wheel performance. Now it is still a variety of corundum grinding wheel grinder cut hardened steel main wheel. Ceramic pipe corundum corundum wheel wear layer can be put away. Wear resistant ceramic pipe corundum layer may be formed mainly by a few millimeters thick, a Mohs hardness of 9, second only to diamond and silicon carbide, all oxides, which is the highest hardness. ¯ pipe and the component is only about 20% alumina, most of SiO2, SiO2 Mohs hardness of 7. Rare high chromium wear-resistant alloy tube or a Vickers hardness of about 400 (Rockwell hardness of about 50); lack of corundum hardness third. So wear-resistant alloy steel pipe, cast pipe wear both by composition and organization, but also by the thickness of the ceramic pipe abrasion resistance compared to them, has been a qualitative leap.

Ceramic-lined carbon steel pipe is the use of SHS - centrifugal method of manufacturing the ceramic pipe corundum melting point 2045 ℃, corundum layer and the steel layer structure due to process special reasons, the stress field is also special. Ceramic layer at room temperature compressive stress, steel layer subjected to tensile stress, the two opposites, into a balanced whole. Only the temperature rises above 400 ℃, since the thermal expansion coefficient between the two, the new stress field generated by the thermal expansion of the ceramic pipe and the stress field in the presence of the original offset each other, so that both the ceramic layer and the steel layer is free equilibrium. When the temperature rises to 900 ℃ to ceramic-lined steel pipe into the water Ling, repeated immersion times, the composite layer does not crack or crack, showing the common ceramic unparalleled thermal shock resistance. This performance would be useful in engineering construction, because of its outer layer of steel, coupled with the inner temperature is not cracked in the construction of the flanges, the purge port, explosion doors can be welded directly to the welding method can also be used connection, than wear and cast stone pipe, wear resistant steel pipe, rare earth abrasion steel, bi-metal composite pipe, steel pipe, steel rubber pipe in construction can not easily welded or soldered better. Ceramic-lined steel pipe good resistance to mechanical shock resistance, while during transportation, installation and beat two weight bracket bent, not broken off the composite layer.

Ceramic-lined carbon steel pipe with high wear resistance, anti-erosion ability of the fluid. In a wind pipe, pipe wear fastest, ceramic-lined steel pipe elbow abrasion wear resistance than thick steel elbow increased more than five times. In practice, the use of ceramic-lined steel pipe 1-2 years after opening observe and measure, the composite layer no significant wear or fall off, the unit of the same size and length of the pipeline, the ceramic-lined steel pipe weighs only wear resistant steel pipe or bimetallic composite pipe is about 1/2, its construction cost is per meter 30-40% lower, only cast stone weight steel pipe and rare wearable 2/5 or so per meter lower than 20% of the project cost. Ceramic-lined steel pipe corrosion or high temperatures in use, its price is only stainless steel pipe, a fraction of the nickel-titanium tubes.


Specifications & size range of ceramic lined pipe
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
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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