Iintroduction In the pipeline system, the elbow is to change the direction of the pipe fittings according to the Angle, there are 45 and 90 180 three most commonly used, in addition, according to the needs of the project also includes 60 other abnormal Angle elbow materials are cast iron stainless steel alloy steel malleable cast iron carbon steel non-ferrous metals and plastics The ways to connect with the pipe are: direct welding (the most common way) flange connection hot melt connection electric melt connection thread connection and socket connection, etc. According to the production process, it can be divided into: welding elbow, stamping elbow, pushing elbow, casting elbow, butt welding elbow, etc. Other names :90 degrees elbow, right Angle bend, etc