Carbon steel 90 degree elbow manufacturer quotes, 90° elbow is a common pipe fitting, generally used when the two sections of pipe that need to be connected are at a 90 degree right angle. 90° elbows can be divided into long radius elbows and short radius elbows according to different applications of long and short radii. Generally, the pipe diameter is relatively large, and it is used in large-scale pipeline systems such as petroleum and chemical industries. The 90° short radius elbow means that its radius of curvature is equal to the outer diameter of the pipe, that is, R=D. Generally, its own pipe diameter is relatively small, which is more common in general household plumbing or power pipeline systems.