Φ159mm,Φ273mm,Φ325mm

Three-roller hot-rolled seamless pipe production line

1.ASSEL features
   ASSEL hot-rolled seamless steel pipe production line is a cross-rolling unit，suitable for the production of medium and thick-walled high-precision steel pipe,can produce all kinds of alloy pipe,bearing steel and carbon tube.And the product structure is reasonable.The modern Assel unit is equipped with a new hydraulic quick-opening device that effedtively solves the problem of the rear triangle and improves the product yield. A number of improvements to the equipment structure of Assel units have greatly saved the time for changing specifications and facilitated the users to organize the production of orders of small batches and specifications.With the limited mandrel technology,their quality can be further improved.Eton Equipment Engineering Ltd has designed and manufactured the capacity of Φ159,Φ273,Φ325mm Assel full production line.

2.the introduction of process
Hot-rolled tube has three basic processes:
   A.In the piercing machine will be ingot or billet hollow thick-walled tube;
   B.Extrusion machine will be thinning on the capillary ,extending to nearly finished pipe shortage of crude pipe.

  C.In the finishing mill rolling into the required finished tube.

3.the history of technology development;
   Seamless steel pipe production has nearly 100 years of history.German Manisman Brothers first invented in 1885 two roller cross-piercing punching machine,in 1891 invented the cycle of pipe rolling machine,in 1903 the Swiss Shi Feifel(RCStiefel) invented the automatic pipe mill (also known as head-type rolling Pipe machine),and later appeared a continuous tube rolling mill and pipe jacking machine and other extension machines,began to form a modern seamless steel pipe industry.
   Nineteen thirties due to the use of three-roll pipe mill,extrusion machine,periodic cold rolling machine,improved the quality of steel varieties.
   In the 1960s,due to the improvement of the continuous tube rolling mill,the emergence of the three-roll perforating machine,especially the application of tension reducing machine and continuous casting slab,improved the producion efficiency and enhanced the competition ability between the seamless pipe and the welded pipe.In the 1970s,seamless pipes and welded pipes are keeping pace.The world's steel pipe production is increasing at an annual rate of over 5%.
   After 1953,China attached importance to the development of seamless steel pipe industry and has initially formed a production system for rolling all kinds of large,medium and small pipes.Seamless pipe is also generally used billet oblique rolling perforation,rolling mill machine,coil drawing process.