A type of welded pipe fittings is made from welded pipes. For pipe fitting manufacturers, the forming process using welded pipes is basically the same as that using seamless pipes, and the forming process of welded pipe fittings does not include the welding process; Another method is for pipe fittings manufacturers to complete the welding process required for pipe forming. Welding flanges are a type of flange pipe fittings that are widely used and promoted in different fields and industries. They are suitable for different applications and environments, and need to be used according to certain conditions. A butt welded elbow is made by welding two steel plates together. Generally, this process is used for large diameter elbows, and those with diameters above 600 are mostly butt welded elbows.