Redrawn square tube: the general is to strip after unpacking, smooth, curl, tube welding to form, and then rolled into the square tube by tube and then cut into the required length. [Guangzhou square tube] Guangzhou GB square tube / Guangzhou square tube stock price square tube according to production standard score: GB square tube, the standard square tube, inch square tubes, American standard tube, the European standard pipe, non-standard square tube. 4, the pipe section by section shape classification square tube shape classification: (1) simple square section tube - square pipe, rectangular square tube (2) the complexity of the pipe sections - flower-shaped square tube, square tube-shaped opening, corrugated square tube, shaped square tube 5, the pipe surface treatment classification square tube divided by the surface treatment: hot dip galvanized pipe, galvanized pipe, oiled square tube, square tube pickling 6, square tube square tube use classification by purpose Category - decorative square tube, square tube with machine tools, industrial machinery square pipe, chemical pipe, square steel pipe, square tube shipbuilding, automotive tube, square tube steel beams, special purpose 7 square tube, the tube wall thickness of the pipe by the thickness classification categories - super thick square tube, thick-walled pipes and thin-walled square tubes Product Specifications Product Specifications square tube 20 * 20 * 0.6-2.0 square tube 130 * 130 * 3.0 -12 square tube 25 * 25 * 0.6-2.0 square tube 140 * 140 * 3.0-12 square tube 30 * 30 * 0.8-3.0 square tube 150 * 150 * 3.0-12 square tube 40 * 40 * 0.8 * 4.0 square tube 160 * 160 * 4.0-12 square tube 50 * 50 * 1.0 * 5.0 square tube 180 * 180 * 4.0-12 square tube 60 * 60 * 1.2-6.0