Classification

Galvanized steel pipe is divided into cold-galvanized steel pipe and hot-dip galvanized steel pipe, the former has been banned, and the latter is also advocated temporarily by the state.

The galvanized steel pipe base body and the molten plating solution undergo complex physical and chemical reactions to form a zinc-iron alloy layer having a corrosion-resistant and tight structure. The alloy layer is integrated with the pure zinc layer and the steel pipe base body. Therefore, its corrosion resistance is strong.The zinc layer of the cold galvanized steel pipe is a plating layer, and the zinc layer and the steel pipe substrate are layered independently. The zinc layer is thin, and the zinc layer is simply attached to the steel pipe substrate and it is easy to fall off. Therefore, its poor corrosion resistance. In new residential buildings, the use of cold galvanized steel pipes as water supply pipes is prohibited.

Process flow

The hot dip galvanized steel pipe,first acid pickling to remove iron oxide,then clean,finally sent to the hot dip plating tank. The zinc layer is uniformity,strong adhesion,long service life,etc.So the corrosion resistant ability is very best.

Use

Firefighting Project: The firefighting water supply pipe is basically a galvanized pipe. A layer of paint is applied on the outer layer of the galvanized pipe. This means that everyone can see the red firefighting pipe. It is actually only a galvanized pipe. Processed.Steel structure, welding engineering: Now there are many scaffolding buildings outside. The former factory buildings were welded with steel pipes, but the welded steel pipes are prone to rust. In order to prevent rust but also coated with a layer of paint, in order to solve this problem, many The new steel structure works directly with galvanized pipes, which saves time and can last longer.Agriculture: It is mainly used to build warm greenhouses for flower sheds and columns for flowers and melons.

Little knowledge: The galvanized pipe, which is often said, is mainly used for conveying gas and heating. The galvanized pipe is used as a water pipe. After a few years of use, a large amount of rust is generated inside the pipe. The outflow of yellow water not only pollutes the sanitary ware, but also contains bacteria that grow on the unsmooth inner wall. Corrosion causes high levels of heavy metals in the water and seriously harms human health. In the 1960s and 1970s, the developed countries in the world began to develop new types of pipes and galvanized pipes were gradually prohibited. China’s Ministry of Construction and other four ministries also issued a document explicitly banned galvanized pipes since 2000.