Black steel pipe
+ Black tube steel has a glossy black surface, suitable for all purposes of construction of civil works, factories, interior and exterior.
+ Bảng báo giá thép ống of black is cheaper than galvanized steel pipe, but the corrosion resistance of black steel pipe is not high, depending on the purpose of use, which box steel you choose accordingly.
Galvanized steel pipe
+ Galvanized steel pipe is black pipe steel but covered with a layer of zinc. This is the reason why it has extremely good abrasion resistance, can be used in extreme conditions such as salt, acid … The average life of galvanized steel box is quite high, from 40 to 60 years if built. erected under favorable conditions.