Elbow materials include cast iron, stainless steel, alloy steel, malleable cast iron, carbon steel, non-ferrous metals and plastics. The connection methods with pipes include direct welding (the most commonly used method), flange connection, hot melt connection, electric fusion connection, threaded connection and socket connection. According to the production process, it can be divided into: welding elbow, stamping elbow, pushing elbow, casting elbow, etc. Other names: 90 degree elbow, right angle bend, love bend.
Most carbon steel elbows are processed by pressure, which will cause plastic deformation of the processed carbon steel elbows. According to the different processing temperatures of elbows, they can be divided into cold processing and hot processing. The main processing methods of carbon steel elbows are: semi continuous rolling mill: including 1-stand Steckel mill and 5-stand finishing mill. On the semi continuous rolling mill, the hot rolling of pipe fittings in the finishing pass is substantially constant from one end to the other end; The time between passes on the finishing mill is usually less than 3S. The pipe fitting process is characterized by the existence of central segregation in the continuous casting thin slab. Eliminating the central segregation in the continuous casting thin slab is a key technical problem to further improve the quality of carbon steel elbow pipe fittings.
In addition, carbon steel elbow is a kind of elbow that can improve the thermal insulation temperature. It is often used in people's daily life and has been widely accepted and used by people. Carbon steel elbow is widely used in buildings, decoration and pipeline laying, which can ensure the normal and smooth pipeline.
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