325 carbon steel elbow

325 carbon steel elbow  

325 Carbon steel elbow is a metal pipe fitting that changes the direction of the pipe on carbon steel pipe.  The connection mode includes thread connection and welding connection.  According to the Angle, the commonly used Angle is 45° and 90°180° three, in addition, according to the needs of the project, it also includes 60° and other special-shaped elbow.  Elbow materials include cast iron, stainless steel, alloy steel, malleable cast iron, carbon steel, non-ferrous metals and plastics, etc.  Carbon steel elbow manufacturers can produce a variety of different angles and materials of carbon steel elbow pipe products according to customer requirements.  

Carbon steel elbow is divided into: carbon steel elbow pipe curvature is divided into: long radius elbow and short radius elbow.  Long radius elbow means that the curvature radius of the elbow pipe is equal to 1.5 times of the pipe diameter, short radius elbow means that the curvature radius is equal to the pipe diameter, that is, R =1.0d (d is the diameter of the elbow, r is the curvature radius.  D can also be expressed as multiple), divided into 45° elbow, 90° elbow and 180° elbow according to elbow Angle.  

Seamless elbow: elbow is used for bending pipe fittings.  For different materials or wall thickness of the elbow, generally choose different forming technology.  The forming process of seamless elbow commonly used by manufacturers includes hot pressing, stamping, extrusion, etc., which accounts for a large proportion of all pipe fittings used in the pipeline system, accounting for about 80%.  

Hot pressing: hot push carbon steel elbow forming process is the use of special elbow push machine, core die and heating device, so that the mold billet under the push rod to move forward and heated process, in expansion and bending.  The tube blank diameter is smaller than the elbow diameter. The deformation process of the blank is controlled by the mandrel. The deformation characteristic of the hot push elbow is to determine the diameter of the blank according to the law that the volume of the metal material remains unchanged before and after plastic deformation.  The metal flow compressed at the inner arc is compensated to the other parts that are thinned by the enlargement, thus obtaining an elbow with uniform wall thickness.  Therefore, it has become the main forming method of carbon steel, alloy steel elbow, also suitable for large-scale production.  The heating methods of forming process include medium frequency or high frequency induction heating, flame heating and reflector heating.  

Stamping forming: stamping forming elbow is a forming process of batch production of carbon steel elbow.  Stamping elbows are divided into cold stamping and hot stamping.  In the production of ordinary elbow, it is replaced by thermal push or other forming process.  The forming process of cold extrusion elbow is to use the common bending machine to put the tube blank into the outer die. After the upper die and the lower die are closed, the blank moves along the gap between the inner and outer die to complete the forming process.  

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