Hot - rolled seamless steel pipe production process flow chart

         

     The seamless steel pipe is strictly manufactured according to the GB/t8162-87, cold rolled (cold drawn) pipe outer diameter of 5 ~ 200mm. The wall is 2.5 ~ 12mm thick. The outer diameter of hot rolled pipe is 32 ~ 630mm. Wall thickness 2.5 ~ 75mm.

There are no cracks, ionosphere, rolling, folding, hairline and scar defects in the inner and outer surface of the steel pipe. These defects should be completely cleared, and the thickness and diameter of the wall shall not exceed the negative deviation.The ends of the steel tube should be cut at right angles and removed burrs.Steel tube wall thickness greater than 20mm to allow gas cutting and hot saw cutting. The agreement of both parties can also supply the cutting head.
The packing of the seamless tube is packed, bundled, and coated with 3 kinds of oil.Compared with solid steel, such as steel pipe and round steel, seamless pipe is lighter in strength and is an economical section steel when the flexural strength and torsion strength are the same.Seamless pipe with a hollow cross-section, a large number of pipes used to transport fluids, such as the transmission of oil, natural gas, gas, water and some solid material pipeline.The utility model can also be used for manufacturing structural parts and mechanical parts, such as automobile transmission shafts, oil drilling rods, bicycle frames, steel scaffolding for building construction, etc.The manufacture of ring parts with steel tubes can improve material utilization, simplify manufacturing processes, and save materials and working hours.Such as rolling bearings, rings, Jack sets, etc., has been widely used to manufacture seamless pipe.