These pipes are made using white rolled iron and the seams in them are welded together with welding seam devices. A reservoir containing zinc is transferred, so it is also called seamless pipes. You can identify these tubes with their dark and gray colors; These pipes are made in light and heavy form according to the needs of the market. Most iron and steel galvanized pipes are made in two dimensions of six meters, which are produced with two ribs with a diameter of 1.2 inches to 8 inches. The diameters of galvanized pipes are known as nominal diameters, and they are larger than the inner diameter and are always smaller than the outer diameter. You can connect the galvanized pipes to each other using a screw gear and connect them to each other using special materials.