The grade and chemical composition of galvanized steel pipe should conform to the grade and chemical

Often said galvanized pipe, the use of galvanized pipe now gas, heating with the kind of iron pipe is also galvanized pipe, galvanized pipe as a water pipe, after several years of use, the pipe produces a large number of rust scale, the yellow water out not only pollution sanitary ware, but also mixed with not smooth inner wall of the bacteria, corrosion caused by the water heavy metal content is too high, seriously harmful to human health.