The main difference between these two types is the difference in materials, which contain chemical components that will keep the surface of the elbow from rusting and corrosion for a long time. According to the standard, it can be transformed into a 90 ° stainless steel long radius elbow.

A carbon steel elbow is a metal fitting that changes the direction of the pipeline on a carbon steel pipeline. The connection methods include screw threads and welding. According to angles, there are three most commonly used types: 45 ° and 90 ° and 180 °. In addition, according to engineering needs, there are also other abnormal angle elbows such as 60 °.

The materials of elbows include cast iron, stainless steel, alloy steel, malleable cast iron, carbon steel, non-ferrous metals, and plastics. The methods of connecting to pipes include direct welding (the most commonly used method), flange connection, hot melt connection, electric melt connection, threaded connection, and socket connection. According to production processes, it can be divided into: welded elbows, stamped elbows, push made elbows, cast elbows, etc. Other names: 90 degree elbow, right angle bend, love bend, etc.