Technical specifications for wear-resistant elbow pipes | Ceramic tiles | Lining | Ceramics | Wear | Elbows
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Technical specifications and requirements: 1. Wear-resistant elbows, wear-resistant ceramic elbows, manufacturers of pipes with ceramic linings. Wear-resistant ceramic elbows are used primarily to protect pipes from damage caused by the abrasive action of mixed gas streams, to prevent leaks resulting from wear that could contaminate the environment, and to extend the service life of the pipes as much as possible. 2. The design, manufacture, and acceptance of wear-resistant ceramic elbow pipes and wear-resistant ceramic straight pipes are carried out in accordance with current international and domestic specifications and standards. Ceramic-lined wear-resistant elbow pipes should be designed and manufactured in accordance with the YB/T 176-2000 standard. 3. The interface dimensions, external dimensions, flow cross-section, and other design parameters of the wear-resistant ceramic elbow shall meet the requirements ； It provides good connection to pipes or other equipment, with excellent sealing properties. For all weld seams between the wear-resistant elbow pipes and wear-resistant ceramic straight pipes, ceramic pieces are applied using the same process on the inner walls in situ; the ceramics should be flat and form a smooth surface. The diameter and material of the straight section of the wear-resistant elbow should be chosen in such a way as to facilitate welding to the powder supply pipeline. The appearance of wear-resistant elbow pipes should be smooth, free from defects such as blemishes or oxide layers. The inner surface of the wear-resistant elbow should be free from casting defects such as shrinkage cavities, porosity, and sand holes. 4. The wear-resistant ceramic elbow together with the corresponding straight sections before and after it (L and K in the table) should be delivered as a complete unit, so that it can be installed on-site directly without the need for pre-assemblage. In the table, the length of the straight sections L and K of the elbow that are not in contact with ceramic at their connections to the straight sections of the coal powder pipeline shall not exceed 100 mm. 5. Depending on the working environment, the wear-resistant ceramic elbow lining consists of alumina ceramic sheets (with a quality content of 95%), with a designed thickness of 8 mm ； The elbow is made of 20# steel with a design thickness of 10 mm ； The alumina ceramic used (with a mass content of 95%) features a high green density, uniform density distribution, a dense crystal structure, as well as good mechanical properties and wear resistance. 6. Remove slag from the cross-section or edges of the steel parts to be welded after thermal cutting.
Description of ceramic wear-resistant elbow assembly: 1. The alumina ceramic has a thickness of 5 mm; the toughened ceramic is not prone to breaking and is resistant to impacts. 2. The wear-resistant elbow cylinder body is made of low-carbon steel seamless tubes, with an outer diameter of 426 mm and a wall thickness of 10 mm; this thickness must not be less than **0.875 according to the standard. 3. For a flange connection with a pressure of 1.0, matching flanges are required, and standard flange specifications must be followed. The mating flanges are not welded; welding is done on-site. 4. Ceramic wear-resistant elbows should have an adjustment section to facilitate installation; this straight section of pipe does not have ceramic material on it and serves as a means for adjustment.
Production process: The self-igniting ceramic composite steel pipe is manufactured using a self-igniting high-temperature centrifugal synthesis process. This tube is composed of three layers, from the inside out: corundum ceramic, a transition layer, and steel. The ceramic layer is a dense corundum porcelain formed at temperatures above 2200 degrees, and it forms a strong bond with the steel pipe through the transition layer. Performance features: It boasts excellent wear resistance, with an inner lining made of corundum porcelain (AL2O3). Its Mohs hardness is greater than 9.0, which is equivalent to an HRC value of over 90; therefore, it offers high wear resistance when used to transport any type of fluid in industries such as power generation, metallurgy, mining, coal mining, and chemicals. Its service life is more than 10 times that of ordinary steel. Due to the single, stable crystal structure of the corundum porcelain (AL2O3) inner lining, it can operate over a temperature range of -50 to 600°C. The linear expansion rate of this material is 6–8×10-6/°C. The inner surface of the composite steel pipe is smooth, resulting in low operating resistance. It also possesses comprehensive properties such as corrosion resistance and anti-scaling capabilities. It has good weldability, and can be connected using methods such as direct welding, flange connections, or quick pipe fittings, making its installation very convenient.
The backpack’s wear-resistant elbows come with an additional wear-proof layer, making them even more durable. Developed by adopting German production techniques and formulas, and through further research in collaboration with well-known domestic universities and research institutions, this material is primarily composed of wear-resistant aggregates such as brown corundum and silicon carbide, along with ultra-fine powders. It also contains sintering agents, ultra-fine particles, coating additives, ceramic powders, composite material powders, and composite adhesives. The particles are densely packed, allowing for rapid molding and high strength; the designed strength is achieved within three days. As a result, there are no major macroscopic defects during use. It has a high volume density, with a strength of over 200 Mpa at room temperature. It is more than 50 times the service life of ordinary concrete and refractory castables. The raw materials mainly consist of ionic compounds and some artificially synthesized covalent compounds. According to solid-state theory, ionic bonds and covalent bonds are strong types of bonds; moreover, due to the use of composite reinforcement measures and special treatments in the bonding system, chemical bonds are formed, resulting in high strength and stiffness that enable effective resistance to high-speed impact forces and shear stresses on the material. Thanks to the use of special acid- and alkali-resistant materials, its performance is stable; it does not react with the surrounding media. Moreover, the materials used in wear-resistant ceramic coatings are mostly high-temperature synthetic materials with well-developed crystals and a stable structure, making them unaffected by environmental factors. They are among the best inert materials, and thus can effectively resist the effects of environmental media as well as various chemical corrosions. Wear resistance of wear-resistant ceramic coatings: Comparative experiments were conducted to illustrate the wear resistance of wear-resistant ceramic coatings. (1) Comparative materials: wear-resistant ceramic coatings, 16Mn wear-resistant steel, 65Mn wear-resistant steel, refractory castables, and wear-resistant ceramic tiles. (2) Experimental conditions and procedure: Time: 15 min ； Medium: 0.5~1mm emery ； Speed: 120m/s ； Distance from nozzle to sample block: 230mm ； Angle of the nozzle and sample block: 90°. (3) Conclusion: The wear resistance of the ceramic coating at room temperature is 10 times that of 16Mn steel, 9 times that of 65Mn steel, and 50 times that of refractory castables. The wear resistance of this ceramic coating changes little as the operating temperature increases. Scope of use: Wear-resistant ceramic coatings are suitable for use in various industries, such as high-temperature flues, coal grinding mills, separators, and for preventing wear in various types of pipes. Sequence number: Applications in cement plants, applications in coal-fired power plants, applications in the steel industry
Jiangsu Jinfulong Anti-corrosion Equipment Co., Ltd. specializes in the production of various anti-corrosion pipeline devices, including large, medium, and small-sized steel-lined PTFE straight pipes, elbows, tees, manifolds, heat exchangers, storage tanks, PO-lined straight pipes, F30-coated components, and reaction vessels. The company is capable of manufacturing products that comply with national standards, American standards, new standards, as well as custom specifications. With a wide range of products and advanced manufacturing techniques, our company offers high-quality products at competitive prices. In 2021, the company achieved sales of 120 million yuan; it has a factory area of over 10,000 square meters. If you have any inquiries, feel free to contact me or visit our factory for technical discussions. Contact person: Guo Dapeng. Phone/WeChat: 18551851121