Galvanized steel pipe 1.Prompt delivery,time-saving 2.High quality ,competitive price 3.Products based on your requirement Galvanized steel pipe1.Square/Rectangular pipe Specification:2.GB6728,DIN,JIS,ASTM-A5003.Grade:Q195,Q235,Q345,ST37-2,ST52-3,SS400,SS3554.We provide square rectangular and round pipe with various spec for many years.5.Our steel pipes are used in many state projects. Product ...