The thin—walled seamless steel tube is made of steel ingot or solid tube billet through perforation. Then it is made by hot rolling, cold rolling or cold.
Seamless steel pipe is divided into hot rolling and cold rolling (dial) seamless steel tube.
Hot rolled seamless steel tube, low, medium pressure boiler tube, high-pressure boiler tube, alloy steel tube, stainless steel tube, petroleum cracking pipe, geological steel tube and other steel pipe.
Cold-rolled (dial) seamless steel tube in addition to general steel tube, low medium pressure boiler pipe, high pressure boiler tube, alloy steel, stainless steel pipe, oil cracking pipe, steel pipe, other include carbon thin wall steel tube, alloy thin wall steel pipes, thin-walled stainless steel tube, steel tube. Generally greater than 32 mm hot rolled seamless steel tube diameter, wall thickness 2.5 75 mm, cold rolled seamless steel tube can be to 6 mm in diameter, wall thickness to 0.25 mm, to 5 mm thin wall pipe diameter, wall thickness less than 0.25 mm, cold than hot rolled high dimensional accuracy