... meet customers' requirements 2) Customized requests accepted3) sectional form:round,equal,rectangle3) Round Section,Dimensions (mm): from 10 to 400;1/2 ... ,pre galvanized hot rolled or hot dipped Zinc-coated for round,equal,rectangle steel pipe.8) Producing: Seamless,Welded,hot rolled ... ~ 25mm9) Standard: GB/T6728, ASTM-A5310) Using: Structural Tubing,Forniture tube,For water,Gas Severage ...