1、 45 ° welded elbow
Elbow is a pipe fitting that changes the direction of the pipeline in the pipeline system. According to the angle, there are 45 ° and 90 ° 180 ° three commonly used, in addition, according to the needs of the project also includes 60 ° and other abnormal angle elbow. Elbow materials are cast iron, stainless steel, alloy steel, malleable iron, carbon steel, non-ferrous metals and plastics. The connection methods with pipes are: direct welding (commonly used) flange connection, hot-melt connection, electric fusion connection, threaded connection and socket connection, etc. According to the production process can be divided into: welding elbow, stamping elbow, push elbow, casting elbow, etc. Other names: 90 degree elbow, right angle bend, love and bend, etc.
According to its curvature radius, it can be divided into long radius elbow and short radius elbow. Long radius elbow means that its radius of curvature is equal to 1.5 times the outer diameter of the pipe, i.e. r = 1.5D; short radius elbow means that its radius of curvature is equal to the outer diameter of the pipe, i.e. r = 1.0d. (D is the diameter of elbow, R is the radius of curvature).