Threaded 45 degree elbows are pipe fittings that change the direction of pipes in piping systems. According to the angle, threaded elbows mainly around two types: 45° and 90°. In addition, there are also other nonnormal angle elbows such as 60° according to project needs. Threaded 45 degree elbows are composed of a screw mouth, a curved part, etc., and are characterized by a thread groove on the screw mouth. In piping systems, threaded elbows are pipe fittings that change the direction of pipes.