The national standard elbow is a pipe fitting that changes the direction of the pipeline. According to the angle, there are three most commonly used ones: 45° and 90°180°. In addition, according to engineering needs, it also includes other abnormal angle elbows such as 60°. The elbow materials are cast iron, stainless steel, alloy steel, malleable cast iron, carbon steel, non-ferrous metals and plastics.
The national standard elbow forming process adopts a special elbow pusher, core mold and heating device, so that the blank sleeved on the mold moves forward under the push of the pusher, and is heated, expanded and bent during the movement process.