There are two section types of the pre-galvanized hollow pipes,the square hollow pipe and rectangular pipe. The size of the hollow pipe can reach 12x12-500mm, and the thickness of the pipe can reach 0.6-20mm. The material grade can reach Q195-Q235. The hollow pipes are bundle with steel strips. And

The galvanized pipes are widely used in oil transportation and construction，such as steel structure, buildings, guard rails, fences, metal furnitures and etc. Due to its zinc coated surface,the galvanized pipes are anti-corrosion. Here are 2 types of galvanizing: hot dip galvanizing and pre-galvanizing. Based on the enviroment of the product needs, you can choose your fittable product.