Elbow refers to the pipe fitting that changes the direction of the pipe in the piping system.

Elbow according to the Angle, there are 45°, 90°, 180° three most commonly used, in addition, according to the engineering needs, also including 60° and other abnormal Angle;According to the production process, it can be divided into welding elbow, stamping elbow, push elbow, casting elbow and so on.Elbow materials are cast iron, stainless steel, alloy steel, malleable iron, carbon steel, non-ferrous metals and plastics, etc.
 

Technical requirements: Since most pipe fittings are used for welding, in order to improve the welding quality, the end parts are beveled, with a certain Angle and a certain edge. This requirement is also strict. The thickness of the edge, the Angle and the range of deviation are specified.The surface quality and mechanical properties are basically the same as pipes.For the convenience of welding, the pipe fittings are of the same steel grade as the pipe to be connected.

All pipe fittings shall be finished, with the inner and outer surfaces of the oxide blasted off by shot peening, and then coated with anti-corrosive paint.

Reducer

Reducing pipe, also called big and small head, is one of the chemical pipe fittings used for connecting two different pipe diameters.Divided into concentric size head and eccentric size head.

Production process:The reducing tube forming process is to put the tube blank with the diameter of the big end of the reducing tube into the forming die, through pressing along the axial direction of the tube blank, so that the metal moves along the cavity and shrinks.According to the size of reducing tube, it can be divided into one pressing forming or multiple pressing forming.The figure below is the schematic diagram of reducing diameter forming of concentric reducing pipe.

Expanding forming is to use the tube blank smaller than the diameter of the big end of the reducing tube, with the inner die along the tube blank diameter expanding forming.The process of expanding diameter mainly solves the problem that the reducing pipe with larger diameter is not easy to be formed by reducing diameter. Sometimes, according to the forming needs of materials and products, the method of expanding diameter and reducing diameter is combined.