Butt-weld elbow is an elbow that connects pipes by welding. It is mainly used to achieve turning and connection functions in pipeline systems. The manufacturing process of butt-weld elbow includes material selection, cutting, forming, heat treatment, welding, grinding and testing. In the manufacturing process, hot pressing or forging is the key link, which determines the shape and dimensional accuracy of the elbow; heat treatment and welding have an important influence on the mechanical properties and corrosion resistance of the elbow.