Square Hollow Section Tube Carbon Steel

Carbon steel pipe is divided into hot rolled and cold rolled two types.    Hot rolled carbon steel pipe is divided into steel tube, low and medium pressure boiler tube, high pressure boiler tube, alloy steel tube, stainless steel tube, petroleum cracking pipe, geological steel tube and other steel pipe etc.    Cold-rolled carbon steel pipe 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. Generally greater than 32 mm hot rolled seamless steel tube diameter, wall thickness 2.5 75 mm, to 6 mm cold rolled seamless steel tube 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. Product Name   black painted welded square and rectangular steel tube pipe Standard  Q195 / Q235 / Q345 (A/B/C/D) ST3…