① Hot rolling Seamless square tube Main production process (main inspection process): pipe blank preparation and inspection → pipe blank heating → piercing → pipe rolling → wastewater pipe reheating → setting (reducing) diameter → heat treatment → finished pipe straightening → reconstruction completion → inspection (non-destructive, physical and chemical, Taiwan inspection) → warehousing
② The main production process of cold-rolled (drawn) seamless square tube is: billet preparation → pickling and lubrication → cold rolling (drawing) → heat treatment → straightening → completion → inspection
Seamless square tubes are produced by hot rolling (about 80-90%) or cold rolling and cold drawing (about 10-20%). Hot rolled billets include round, square or polygonal ingots, square billets or continuous casting billets. The quality of billets directly affects the quality of billets. There are three basic processes for hot-rolled steel pipes: ① piercing ingots or billets into hollow thick walled capillary tubes on a piercing machine; ② Dilute the capillary tube on the extender and extend it into the waste water pipe with wall thickness; ③ Rolled on the finishing mill, the finished pipe is made as required. This series of rolling mill is represented by the large outer diameter of the square tube produced.
That's it Tangshan square tube manufacturer The production process of hot-rolled seamless square tube introduced to you, if you have other questions, please consult us!
