Suzhou galvanized (round) pipe, line pipe, scaffolding, water fire hose with steel of various thickness (Chia, Friends, Jun Cheng, Jinzhou) complete specifications, factory outlets, the price is reasonable. Xinlong steel inquire 0512-65086995 13382509806 15950991968 complete specifications: φ40, φ30, φ45, φ50,300 * 2.5, φ80 * 3, φ40 * 2.0, φ80 * 2.5, φ65 * 3, φ40 * 3.5, φ20 * 1.5, φ20 * 2.5, φ25 * 2.0, φ65 * 2.5, φ150 * 2.5, φ200 * 4.75, φ25 * 1.5, φ250 * 4.5, φ200 * 2.75, φ250 * 4.75, φ250 * 2.75, φ50 * 2.5, φ50 * 3.5, φ32 * 1.5 , φ15 * 1.0, φ15 * 2.0, φ32 * 2.5, φ300 * 4.75, φ125 * 3, φ300 * 6, φ100 * 2.5, φ100 * 3.5, φ150 * 4.75, φ200 * 3.5, φ125 * 2.5, φ300 * 3.5 and other hot Galvanized pipe: Is the molten metal and the reaction of the iron matrix alloy layer, so that the substrate and coating combination of both. Hot dip galvanized steel pickling is the first, in order to remove the steel surface of the iron oxide, after pickling, cleaning by mixing an aqueous solution of ammonium chloride bath or zinc chloride or ammonium chloride and zinc chloride aqueous solution and then into hot dip tank. HDG has a uniform coating, strong adhesion, long life and other advantages. Cold galvanized pipe: Cold galvanizing is galvanized, galvanized small amounts, only 10-50g / m2, its own corrosion resistance than galvanized pipe a lot of difference. Regular galvanized pipe manufacturer, in order to ensure the quality, most do not use electro-galvanized (cold plating). Only those who are small, outdated equipment and small businesses employ electro-galvanized, of course, their price is relatively cheaper. Currently the Ministry of Construction has formally below, eliminate backward technology of cold galvanized pipe, cold galvanized pipe not allowed to use in the future for water, gas pipes. Galvanized steel hot galvanized and electro-galvanized two, galvanized galvanized thickness, with a uniform coating, strong adhesion, long life and other advantages. Electro galvanized low cost, surface is not very smooth, its own corrosion resistance than galvanized pipe a lot of difference. In order to improve the corrosion resistance of the steel pipe, galvanized steel pipe for general. Galvanized steel hot galvanized and electro-galvanized two, galvanized galvanized thickness, low cost galvanized surface is not very smooth. Oxygen pipe: used for steelmaking blowing tube, usually with a small diameter welded steel pipe, specifications from 3 / 8-2 inch eight. By 08,10,15,20 or 195-Q235 is made into steel, in order to prevent corrosion, and some to be ALUMINIZING. Most of the old houses are used galvanized pipe, and now gas, heating with the kind of iron pipe is galvanized pipe, galvanized pipe as water pipes, the use of a few years, a large amount of rust inside the tube, not only out of the yellow water pollution ware, and mixed with non-smooth inner wall to breed bacteria, corrosion caused by heavy metal content of the water is too high, serious harm to human health. Sixties and seventies, the international developed countries began to develop new pipe, and gradually disable the galvanized pipe. Chinese Ministry of Construction and other four ministries also issued a document explicitly disabled galvanized pipe from 2000 onwards, the new district currently has rarely used the cold water pipe galvanized pipe, and some residential hot water pipes using galvanized pipe. Black pieces hanging material inspection → → degreasing → rinsing → pickling → washing → dipping fluxing economy → hot air drying → HDG → cooling → passivation and rinsing → unloading → inspection, repair → packaging and storage, transport Nominal thickness mm 2.0 2.5 2.8 3.2 3.5 3.8 4.0 4.5 coefficient c 1.064 1.051 1.045 1.040 1.036 1.034 1.032 1.028 steel grades: Q215A; Q215B; Q235A; Q235B test pressure /Mpa:D10.2-168.3mm to 3Mpa; D177. 8-323.9mm to 5Mpa