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Galvanized Steel And Corrosion Resistance Oct 11, 2017

In order to improve the corrosion resistance of steel pipe, the general steel pipe (black tube) galvanized. Galvanized steel pipe hot galvanized and electric steel zinc two, hot galvanized galvanized layer thickness, galvanized low cost. Oxygen blowing pipe: used for steel blowing oxygen tube, generally with a small diameter welded steel pipe, specifications from 3/8 inch -2 inch eight. Made of 08,10,15,20 or Q195-Q235 steel strip. For the corrosion, and some of the aluminizing treatment. Wire casing: also ordinary carbon steel welded steel pipe, used in concrete and a variety of structural distribution works, commonly used nominal diameter from 13-76MM. The wire sleeve wall is thinner, mostly coated or galvanized after use, requiring a cold bending test.Galvanized Steel

Often used galvanized pipe, galvanized pipe use now gas, heating with the kind of iron pipe is galvanized pipe, galvanized pipe as a water pipe, use a few years later, the tube produces a lot of rust, the outflow of yellow water is not only pollution Sanitary ware, and mixed with non-smooth inner wall of bacteria, rust caused by heavy metal content in water is too high, seriously endangering the health of the human body. The sixties and seventies, the international developed countries began to develop new pipe, and one after another ban galvanized pipe. China's Ministry of Construction and other four ministries also issued a document from 2000 onwards to ban galvanized pipe, the new district of cold water pipes have been rarely used galvanized pipe, and some residential hot water pipe using galvanized pipe.Galvanized Steel

Cold bending test Galvanized steel pipe with nominal diameter not more than 50mm should be tested for cold bending. The bending angle is 90 ° and the bending radius is 8 times the outer diameter. The test shall be filled without the filler and shall be placed on the outside or upper part of the bending direction. After the test, there should be no cracks and cracks on the sample. The mechanical properties of steel are important indicators to ensure the ultimate use of steel (mechanical properties), which depends on the chemical composition of steel and heat treatment system. In the steel pipe standard, according to different requirements, the tensile properties (tensile strength, yield strength or yield point, elongation) and hardness, toughness indicators, as well as the user requirements of high and low temperature performance.Galvanized Steel