Such can be divided into stainless steel seamless pipe and welded stainless steel pipe (pipe joints) into two categories, according to different manufacturing processes can be stainless steel tube: hot-rolled, extruded, cold drawn and cold rolled it several basic types, Press the cross-sectional shape can be divided into tube and shaped tubes 316l stainless steel, widely used in decorative stainless steel tube is round, but there are some square, rectangular, semi-circular, hexagonal, equilateral triangle, octagon shaped stainless steel, etc. pipe. (Rolled) seamless steel pipe: round tube → heating → perforation → Heading → annealing → pickling → oiled (copper) → multi-pass cold drawn (cold) → billet tube heat treatment → → straightening → hydrostatic test (testing) → mark → storage. Cold drawn (rolled) than hot-rolled seamless steel pipe rolling method (squeeze seamless steel pipe) complex. Their first three steps of the production process is basically the same. Differs from the beginning of the fourth step, after playing a round tube empty to begin with annealing. After annealing to use a special acidic pickling liquid. Pickled, oiled. Then followed through many times of cold drawn (cold) and then the blank pipe stainless steel pipe, specialized heat treatment. After the heat treatment, it will be straightened. 304 stainless steel tube as a heat-resistant stainless steel is the use of food equipment stainless steel pipe, the general chemical equipment, atomic energy industry equipment. 304 stainless steel rust performance than the 200 series stainless steel stronger. High temperature also relatively good, can be high to the 1000-1200 degrees. 304 stainless steel with excellent corrosion resistance and good energy between resistance to intergranular corrosion. 304 equivalent of China's 0Cr19Ni9 (0Cr18Ni9) stainless steel. 304 19% chromium, nickel 9%. 304 is the most widely used stainless steel, heat-resistant steel, practical steel, stainless steel pipe fittings UOL | Stainless Steel Pipe | Shengda-commerce provided by Tianjin Bao Bao Jie Shengda Trading Company. Bao Jie Tianjin Shengda Trading Company (www.sdbjsm.com) strong, credible, in Tianjin's daily hardware industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Shengda treasure-commerce and you hand into the brilliant, for a better future!