Views:227 Author:Site Editor Publish Time: 2020-03-16 Origin:Site
At present, galvanized steel pipes are used very much, but galvanized steel pipes are classified. What is the difference between galvanized steel pipes and galvanized seamless steel pipes? Galvanized seamless pipes sound high-profile. Galvanized seamless pipes generally use hot-dip galvanizing, and the galvanized layer is thick, so the corrosion resistance is stronger and the service life is longer. With the improvement of building quality, the service life and strength requirements of piping systems have also increased. The product often replaces galvanized steel pipes, which are used for pipeline systems with higher requirements for fire protection, air conditioning, and other circulating water and gas medium transportation.
Galvanized steel pipe has a plainer appearance than galvanized seamless steel pipe. The "galvanized" coating is uniform and has strong adhesion, but this is not a simple process like applying skin care products on the face. Hot-dip galvanizing is to pickle the welded steel pipe first. In order to remove the iron oxide on the surface of the steel pipe, after pickling, it is washed in an ammonium chloride or zinc chloride aqueous solution or a mixed aqueous solution of ammonium chloride and zinc chloride.
The hot-dip galvanized steel pipe substrate undergoes a complicated physical and chemical reaction with the molten plating solution to form a corrosion-resistant and dense zinc-iron alloy layer. The alloy layer is integrated with the pure zinc layer and the steel pipe substrate. Without the welded steel pipe before the beauty is very grounded.
The difference between galvanized steel pipe and seamless steel pipe are as follows:
Seamless steel pipe is made of a whole piece of metal, and there is no seam on the surface. Galvanized steel pipes are welded steel pipes with hot-dip galvanized or galvanized surface.
Cold-galvanized steel pipes in galvanized steel pipes have been banned in the 1960s and 1970s. Developed countries in the world began to develop new types of pipes and banned galvanized pipes one after another. China's Ministry of Construction and other four ministries and commissions have also issued documents expressly banning galvanized pipes as water supply pipes from 2000. Galvanized pipes are rarely used for cold water pipes in newly built communities, and galvanized pipes are used as hot water pipes in some communities. Seamless steel pipes have not been disabled.
Seamless steel pipes are mainly used for petroleum geological drilling pipes, cracking pipes for petrochemicals, boiler pipes, bearing pipes, and high-precision structural steel pipes for automobiles, tractors and aviation. Hot-dip galvanized steel pipe is widely used in construction, machinery, coal mine, chemical industry, electric power, railway vehicles, automobile industry, highway, bridge, container, sports facility, agricultural machinery, petroleum machinery, prospecting machinery and other manufacturing industries.