Lined elbow fittings are made with steel pipes as the skeletal material and lined with rubber that boasts excellent wear resistance, corrosion resistance, and heat resistance. Utilizing the unique properties of rubber such as high elasticity, high airtightness, shock resistance, wear resistance, weather resistance, radiation resistance, resistance to chemical media, and vibration absorption, the products are bonded with high-performance adhesives and cured through special processes. They offer high wear resistance, resistance to water hammer impact, corrosion resistance to acids, alkalis, and salts, high resistance to high temperatures, slow scaling, high bonding strength, low operating resistance, broad range of conveying media, long service life, and energy and material savings. They reduce the impact wear on pipe walls caused by the conveyed medium, and are widely used in pipelines and equipment for conveying media with both wear and corrosion, within a theoretical temperature range of -40℃ to +150℃ in industries such as metallurgy, power, chemicals, petroleum, coal, and cement.