Products according to national standard GB / T14976-2002 (fluid transport stainless steel seamless pipe) 316l stainless steel pipe, GB / T14975-2002 (structure seamless stainless steel), GB / T13296-91 (boiler, heat exchanger with stainless steel seamless pipe ), decorative welding stainless steel pipe (GB / T 18705-2002), architectural decorative stainless steel welded pipe (JG / T 3030-1995), have to undergo rigorous testing, in line with national standards of technical requirements Material 321 / 1Cr18Ni9Ti 304 / 0Cr18Ni9 310S / 0Cr25Ni20 316L / 00Cr17Ni14Mo2 301 304L ① using element symbols ② use Hanyu Pinyin 304 stainless steel, open-hearth steel: P, boiling steel: F, killed steel: B, Group A steel: A, T8: Special 8, GCr15: Ball ◆ structural steel, spring steel, such as: 20CrMnTi 60SiMn, (with a few that C content births) ◆ stainless steel, alloy tool steel (with a few thousandths C content) stainless steel tube, such as: 1Cr18Ni9 thousandth ( That is 0.1% C), stainless C≤0.08% as 0Cr18Ni9, ultra-low carbon stainless steel C≤0.03% as 0Cr17Ni13Mo material into ordinary carbon steel, high-quality carbon steel, alloy pipe, steel pipe, bearing steel stainless steel tubes, and in order to save precious metals and meet the special requirements of bimetallic composite pipe, coatings and coating tubes. Many types of stainless steel pipes, for different purposes, different technical requirements, production methods are also different. Pipe diameter range of current production 0.1-4500mm, wall thickness 0.01 ~ 250mm. To distinguish its characteristics, usually by the following method for steel classification. Production of stainless steel pipe production is divided into two major categories of stainless steel seamless and welded pipe, seamless steel pipe can be divided into hot-rolled, cold-rolled, cold drawn tubes and squeeze tubes, cold drawn, cold is secondary processing of steel; Longitudinal and spiral welded pipe and so divided. Stainless steel pipe fittings, Shengda Po-commerce (certified), stainless steel pipe provided by the Tianjin Shengda Bao Jie Trading Company. Bao Jie Tianjin Shengda Trading Company (www.sdbjsm.com) is Tianjin, hardware leader, over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Shengda Po-commerce leader in the staff warmly welcome all inquiries negotiations to create Shengda Po-commerce a better future.