Lining materials are substances used to cover the inner surfaces of various structures, such as pipes, tanks, and containers. They serve multiple purposes, including protecting the underlying material from corrosion, reducing friction, and providing insulation. Common lining materials include epoxy, polyurethane, and ceramic, each chosen based on specific requirements like temperature resistance and chemical compatibility. In industrial applications, lining materials play a crucial role in extending the lifespan of equipment and ensuring safety. For example, in the food industry, food-grade linings are essential to prevent contamination, while in the oil and gas sector, corrosion-resistant linings help maintain the integrity of pipelines.