Ceramic-lined backpack elbow
Thread Content
Straight pipes, elbows, bends, tees, etc. perform very well in industries with severe wear. The full name is ceramic-lined composite steel pipe. Composite pipes take full advantage of the high strength, good toughness, impact resistance, and excellent weldability of steel pipes, as well as the high hardness, superior wear resistance, corrosion resistance, and heat resistance of corundum ceramics, thereby overcoming the shortcomings of steel pipes such as low hardness and poor wear resistance, as well as the poor toughness of ceramics. Therefore, composite pipes possess excellent comprehensive properties such as wear resistance, heat resistance, corrosion resistance, resistance to mechanical and thermal shock, as well as good weldability. It is an ideal wear-resistant and corrosion-resistant pipeline for transporting granular materials, for grinding, and in environments with corrosive media. Pasted wear-resistant tubes exhibit great advantages ranging from mooring ropes in offshore oil fields to high-performance lightweight composite materials; they play a crucial role in areas such as modern warfare, aviation, and maritime defense equipment. Ceramic wear-resistant elbows are used in coal-fired power plants for ash removal and slag discharge pipes, as well as for powder feeding and return pipes and desulfurization pipelines. They are also widely employed in the following industries: Mining: in the coal industry for slurry preparation, coal washing sludge, mine filling materials, and coal powder; Metal mining: for transporting concentrate and tailings using wear-resistant elbows; Metallurgy: in steel plants for blast furnace coal injection and slag transportation during iron smelting, as well as for transporting CAO and zinc oxide sand, and for transporting ferroalloys and in processes such as secondary refining – where wear-resistant elbows are an excellent choice; Cement factories: for transporting raw material slurry on wet process production lines, for coal powder transportation, for discharging material from elevators, for pneumatic handling of finished cement, and for transporting concrete – all applications requiring wear-resistant elbows. Chemical plant: wear-resistant elbows for transporting coal powder pipelines and raw materials such as silicon powder. Mines: The filling of mines, as well as the transportation of concentrate powder and tailings, cause severe wear on pipelines. The pipeline systems used in the past for transporting mineral powder, such as those in Panzhihua and Daye mines, had a service life of less than one year; by using this new type of pipeline, the service life can be increased by about 5 times.
Performance 1: Good wear resistance. Due to the corundum ceramic (α-Al2O3) lining layer, the ceramic composite pipe has a Mohs hardness of 9.0, which is equivalent to over HRC 90. Therefore, it exhibits high wear resistance against abrasive media transported in industries such as metallurgy, power generation, mining, and coal mining. Industrial operation has proven that its wear resistance life is ten times, or even dozens of times, that of quenched steel. 2. Low operating resistance: The SHS ceramic composite pipe has a smooth inner surface, does not rust, and lacks the protruding spiral patterns found on the inner surface of seamless steel pipes. According to tests conducted by relevant testing institutions on the internal surface roughness and flow resistance, the smoothness of its internal surface is superior to that of any metal pipe, with a flow resistance coefficient of 0.0193, which is slightly lower than that of seamless pipes. Therefore, this pipe features low operating resistance, which can reduce operating costs. 3. Corrosion resistance and anti-scaling property: Since the steel-ceramic layer is (a-AL2O3), it has neutral properties. Therefore, it possesses acid and alkali resistance as well as seawater corrosion resistance, along with scale prevention properties. 4. Good performance: Since this corundum ceramic (a-AL2O3) has a single, stable crystalline structure. Therefore, the composite pipe can operate normally over a long period in a temperature range of -50 to 900°C. The linear expansion coefficient of the material is 6-8×10-6/°C, which is approximately half that of steel pipes. The material has good thermal stability. 5. Low cost of construction: Ceramic composite pipes are lightweight and come at an affordable price. 50% lighter than cast stone pipes of the same inner diameter ； It is 20-30% lighter than wear-resistant alloy pipes, and boasts good wear and corrosion resistance; its long service life reduces costs related to supports, handling, installation, and operation. Through a comparison between the project budgets prepared by the relevant design institutes and construction units and the actual costs of the project, it was found that the cost of this type of pipe is comparable to that of cast stone pipes; compared with wear-resistant alloy pipes, its cost is reduced by about 20%. 6. Easy installation and construction: The pipe is lightweight and has good weldability. Therefore, methods such as welding, flanges, and quick connections can be used, which facilitates construction and installation while reducing installation costs.