Pipe fittings are crucial components that ensure secure and leak-proof connections in plumbing, heating, and other engineering systems. They are used to create bends, branches, changes in diameter, and other complex sections of pipelines. Fittings are made from various materials, such as metal, plastic, brass, and copper, allowing them to be used in systems with different operating conditions and requirements. The reliable connections provided by fittings prevent leaks and contribute to the longevity of the entire system.