-
Galvanized steel pipes and black steel pipes are both carbon steel pipes, but they have different uses due to their different surface treatments. Galvanized steel pipes are coated with zinc on the outside, which makes them highly resistant to corrosion and has a long service life. They are often used in water supply and outdoor projects. Black steel pipes are not protected and have a low cost. They are mostly used for the transportation of natural gas and steam as well as indoor structures.
-
When comparing Hot-dip galvanized pipe vs Cold galvanized pipe, the main differences lie in coating process, thickness, and durability. Hot-dip galvanized pipes are immersed in molten zinc, creating a thick alloy-bonded zinc layer that offers excellent corrosion resistance and long service life, making them ideal for outdoor and harsh environments. Cold galvanized pipes, often referring to electro-galvanizing or zinc-rich coating, provide a thinner and smoother surface layer with limited protection, which is more suitable for indoor applications or as a maintenance solution.
-
Hot-dip galvanized steel pipe (hot-dip galvanized steel pipe) is a type of steel pipe with strong corrosion resistance, which is formed by immersing ordinary steel pipes (usually carbon steel pipes) in molten zinc at about 450℃ after pickling and rust removal, so that a dense zinc layer evenly covers the surface.