Rolled steel due to pass in the method widely used in the production of seamless steel tubes. The main purpose of the stretching machine is further reduced sectional view (main compression wall) for a larger axial extension, so that the capillary improved dimensional accuracy, surface quality and organizational performance.Īfter stretching machine rolled steel pipe shortage collectively need further molding mill in order to achieve the requirements of the finished pipe.
Capillary in the specifications, accuracy and surface quality can not meet the requirements of the finished product, further improvements are needed to deform the metal through. The main purpose of the perforation process is to become a solid round billet piercing hollow shell. Hot-rolled seamless steel pipe production base deformation process can be summarized as three stages: perforation, extension and finishing. Hot rolled seamless steel pipe deformed process Rolling hard roll weight is generally 6 to 13.5 tons, the coil diameter of 610mm. Rolling hard roll can be used as the raw material of the hot-dip galvanizing plant, hot dip galvanizing line set annealing line. Process Cold drawn seamless steel tube deformed processĬold Drawn Seamless Mechanical Tubing (CDS) is a cold drawn 1018/1026 steel tube which offers uniform tolerances, enhanced machinability and increased strength and tolerances compared to hot-rolled products.Ĭold drawn steel tube is with hot-rolled steel coil as raw material, and tandem cold rolling pickled to remove oxide scale, its finished rolling hard roll, rolling hard volumes due to the continuous cold deformation caused by cold hardening strength, hardness increased indicators declined tough plastic, stamping performance will deteriorate, which can only be used for simple deformation of the parts. Table 1, size for cold-drawn or cold rolled tube (Unit:mm) Superheater tube, Reheater tube, Main steam pipe, Pipleline, Header pip, Petrochemical furnace tube, Heat exchange tubeĭimension tolerances of seamless steel pipe Pipeline, Header pipe, Petrochemical furnace tube, Heat exchange tube Economizer tube Water wall tube, pipeline, header pipe, Petrochemical furnace tube, heat exchange tube
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