How to identify people often think steel pipe steel pipe magnets, and verify the authenticity of their advantages and disadvantages, do not smoke, non-magnetic, 20G high-pressure boiler pipe, believed to be good, genuine; sucked by magnetic, it is considered counterfeit fakes. In fact, this is an extremely one-sided, no practical method to identify errors. Many types of steel pipe, according to the organizational structure at room temperature can be divided into several categories: commonly used as a decorative tube plate steel pipe most of austenitic 304, in general, is a non-magnetic or weakly magnetic, but the smelting fluctuations caused by the chemical composition or the processing status of different magnetic may also occur, but it can not be considered to be counterfeit or substandard, which is what causes it? In addition, 304 steel pipes after cold working, organizational structure will be transformed to martensite, the greater the degree of cold deformation, more martensite transformation, the greater the magnetic steel. As the strip batch number, production Φ76 pipe, no magnetic induction, boiler tube, pipe production Φ9.5. Ling bending deformation of large magnetic induction obviously some rectangular tube production due to the large amount of deformation tube, 20g boiler tubes, especially Angular part, more intense magnetic distortion is more evident. This tells us that if the steel pipe with a weak magnetic or entirely without magnetic, should determine the 304 or 316; if the magnetic steel of the same, showing ferromagnetic, it is determined not 304. Liaocheng in Shandong Steel Pipe Manufacturing Co., Polygram produce diameter 4mm-1420mm, wall thickness of 1mm-50mm, length 3m-14m, the material 20 #, 16Mn, Q235B, Q345BCDE alloy steel, stainless steel high-grade steel can manufacturing, various non-standard models of pipe wall thickness can reach more than 1,000 kinds of products are widely used in major projects in petroleum, natural gas, steel, thermal power generation, shipbuilding, foundation piling. Liaocheng in Shandong Steel Pipe Manufacturing Co., Ltd. Main Polygram: alloy tube: 12Cr1MoVG15CrMoG10CrMo910Cr5Mo1Cr5MoCr9MoWB36P11P12P22P5P91T91 T11T12T22T5T2P5SA213T91A335P91SA213T92A335P9213CrMo441Cr11MoV cryo tubes; high-pressure boiler tubes within A333GR.6A333GR.3A333GR.1A333GR.716MnDG16MnDQ345DQ345CQ345EQ345B thread; 20GSA-106BA53-BSY45.8-111GB5310GB3087 oil cracking tube; 12Cr1MoV15CrMoCr5Mo1Cr5MoP520G16MnGB9948- 2006 Hastelloy tube: C276C22 Liaocheng Polygram Pipe Manufacturing Co., specializing in the manufacture of seamless steel tubes threaded, customers need to stay telecommunications or to visit the factory! ! Is a high-pressure boiler tube boiler tubes, seamless steel pipe category belongs. The method of manufacturing the same and seamless, but the steel used in the manufacture of steel, there are strict requirements. High-pressure boiler tubes often in high temperature and high pressure conditions, use, boiler pipe manufacturing, pipe under the effect of high temperature flue gas and water vapor, would oxidation and corrosion. Requirements durable steel with high strength, high oxidation resistance, and good organizational stability. High-pressure boiler tube is mainly used to manufacture high and ultra-high pressure boiler superheater tubes, reheater tube, airway, the main steam pipe. Low pressure boiler tubes GB3087-1999, high-pressure boiler pipe GB5310-1999 is used to manufacture various structural low and high pressure boiler superheated steam pipes, boiling water pipes and superheated steam locomotive boiler tubes, opium pipe, small pipe and brick arch effective quality carbon structural steel hot-rolled and cold drawn (rolled) boiler pipe manufacturer, 20G boiler tubes, boiler tubes supplied by Polygram Liaocheng Steel Pipe Manufacturing Co., Ltd. Liaocheng in Shandong Steel Pipe Manufacturing Co. Polygram (www.lcbljgg.com) (www.lcbljgg.com) (www.sdlcblj.com) (www.bljggzz.com) Shandong Liaocheng, wire, pipe, plate manufacturing equipment leaders, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Polygram steel leader with the staff warmly welcome all inquiries negotiations to create Polygram steel better future.