Butt fusion welding, also known as butt welding or simply fusion, is a type of welding procedure commonly used to join two pieces of thermoplastic together. Butt fusion welding offers numerous advantages that make it an appealing choice for many industries and applications. The process involves heating the ends of two parts simultaneously and pressing them together until they become one unified part with uniform thickness throughout. The resulting joint is extremely durable and can be further strengthened with additional heat treatment techniques if necessary.