Hot dip galvanized Pipe VS Cold-galvanized pipe
What is a high quality galvanized steel pipe?
Galvanized steel pipe is divided into hot-dip galvanizing and electro-galvanizing. The hot-dip galvanizing layer is thick, with uniform plating, strong adhesion and long service life. The cost of electroplating is low, but the surface is not very smooth, and the corrosion resistance is much worse than that of hot-dip galvanized pipe.
Hot dip galvanized steel pipe:
Hot-dip galvanized steel pipe is a kind of welded steel pipe with hot-dip or electro-galvanized layer on the surface. It is widely used in construction, machinery, coal mining, chemical industry, electric power and other manufacturing industries.
Cold-galvanized steel pipe:
Cold galvanized pipe is a pipe that is coated with a layer of zinc on the outside of the pipe by electro-galvanizing. Now it has basically withdrawn from the field of fluid transportation. Due to the good welding performance, it is still used in some fire-fighting water and common frame structures.
What are the specific differences between cold galvanized pipes and hot galvanized pipes?
Corrosion resistance: Hot galvanized steel pipe corrosion resistance is dozens of times that of cold galvanized steel pipe.
The mode of operation: The zinc in hot dip galvanizing is generally obtained at 450 degrees Celsius to 480 degrees Celsius. While the zinc in cold galvanized steel pipe is obtained by electroplating at room temperature.
The thickness of the galvanized layer: The thickness of zinc in the hot-dip galvanized steel pipe is much thicker than that in the cold galvanized steel pipe.
Surface smoothness: The surface of cold galvanized steel pipe is much rougher than that of hot galvanized steel pipe.
Price: Cold galvanized pipe is much cheaper than hot-dip galvanized pipe.
Adhesion: The adhesion of cold galvanized steel pipe is much worse than that of hot galvanized steel pipe. This is because the steel pipe matrix and the zinc layer of cold galvanized steel pipe are independent. The zinc layer is very thin and simply adheres to the steel pipe matrix, so the cold galvanized steel pipe comes off easily.
Others: The cold galvanized steel pipe is only one side of the galvanized steel pipe. And the hot galvanized steel pipe should be fully galvanized.
What is high quality galvanized steel pipe used for?
In order to improve corrosion resistance, the general steel pipe is galvanized, such as black pipe. Nowadays, with the development of the industry, the demand for galvanized steel pipes is increasing.
Hot-dip galvanized steel pipe products have been used in many fields. The advantage of hot-dip galvanized is that the anti-corrosion life is long. It is widely used in power tower, communication tower, railway, road protection, road light pole, Marine components, building steel structure components, substation ancillary facilities, light industry and so on.
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