DN150 Ceramic-Lined Steel Pipe: A Comprehensive Overview The DN150 ceramic-lined steel pipe is a high-performance composite pipe designed for demanding industrial applications where abrasion, corrosion, and high-temperature resistance are critical. Combining the mechanical strength of steel with the exceptional wear resistance of alumina ceramics, this pipe offers superior durability and longevity in harsh environments. 1. Structure and Composition The pipe consists of three primary layers: - Outer Steel Shell: Made from high-quality carbon steel (e.g., ASTM A53 or A106), providing structural integrity and impact resistance. - Ceramic Lining: A tightly bonded alumina (Al₂O₃) layer, typically 4–6 mm thick, with a hardness of 9.0 on the Mohs scale, ensuring exceptional abrasion resistance. - Intermediate Adhesive Layer: A high-temperature-resistant adhesive bonds the ceramic to the steel, preventing delamination under thermal or mechanical stress. 2. Key Features and Advantages - Abrasion Resistance: The ceramic lining withstands severe wear from abrasive materials like coal, ore, or fly ash, extending service life by 5–10 times compared to unlined pipes. - Corrosion Resistance: Inert alumina ceramics resist chemical attack from acids, alkalis, and salts, making the pipe suitable for slurry transport or chemical processing. - High-Temperature Tolerance: Stable performance up to 350°C, ideal for thermal power plants or cement industries. - Smooth Surface: The ceramic lining reduces friction, minimizing pressure drop and energy consumption in pneumatic or hydraulic systems. - Lightweight Design: Thinner ceramic linings reduce weight versus solid ceramic pipes while maintaining strength. 3. Manufacturing Process 1. Steel Pipe Preparation: The steel pipe is cleaned and pre-treated to ensure adhesion. 2. Ceramic Application: Alumina ceramics are either centrifugally cast, sintered, or bonded as pre-formed tiles inside the pipe. 3. Curing and Inspection: The adhesive is cured at high temperatures, followed by ultrasonic testing to verify bonding quality. 4. Applications - Mining & Mineral Processing: Transporting ore slurries or tailings. - Power Generation: Ash handling systems in coal-fired plants. - Cement Industry: Clinker, limestone, or raw meal conveyance. - Chemical Industry: Aggressive fluid or powder transport. 5. Installation and Maintenance - Joining Methods: Flanged, welded (with ceramic protection), or mechanical couplings. - Handling: Avoid impact during transport to prevent ceramic cracking. - Maintenance: Inspect for liner wear at bends or junctions; damaged sections can be replaced modularly. Conclusion The DN150 ceramic-lined steel pipe is an engineered solution for extreme wear and corrosion challenges. Its hybrid design optimizes cost-efficiency by reducing downtime and replacement frequency, making it a preferred choice for industries prioritizing reliability and operational efficiency.