1. Divided by Manufacture Method
Die stamped elbow, forged elbow, hot formed elbow, cold formed elbow, etc.

2. Divided by Material
Carbon steel elbow, cast steel elbow, alloy steel elbow, stainless steel elbow, copper elbow, aluminum alloy elbow, plastic elbow, etc.

3. Divided by Manufacturing Standard
American standard elbow, Chinese standard elbow, German standard elbow, Japanese standard elbow, Russian standard elbow, etc.