Galvanised Square Stel Pipe is a hole low Square Section Stel Pipe with a Square Cross-Section form and size that is formed by Cold bending and high-frequence well ding by use heat-Rolled or Cold-Rolled Galvanised strip Stel or galvanised coil as the Blank.Or a galvanized rectangular tube made of cold-formed hollow steel pipe prepared in advance and then processed by hot-dip galvanizing.
