Views: 0 Author: Site Editor Publish Time: 2020-08-13 Origin: Site
Galvanized pipe, also known as galvanized steel pipe, is divided into two types: hot-dip galvanized and electro-galvanized. The hot-dip galvanized layer is thick and has the advantages of uniform coating, strong adhesion, and long service life. The cost of electro-galvanizing is low, the surface is not very smooth, and its corrosion resistance is much worse than that of hot-dip galvanized pipe.
Galvanized steel pipes are divided into cold-plated pipes and hot-dipped pipes.
Hot-dip galvanizing is to first pickle the steel pipe. In order to remove the iron oxide on the surface of the steel pipe, after the pickling, it is cleaned in a tank with ammonium chloride or zinc chloride aqueous solution or a mixed aqueous solution of ammonium chloride and zinc chloride, and then sent to Hot dip plating tank. Hot-dip galvanizing has the advantages of uniform coating, strong adhesion and long service life. Most of the northern processes adopt the galvanized strip direct coiling pipe galvanizing process.
Cold galvanizing is electro-galvanizing. The amount of galvanizing is very small, only 10-50g/m2, and its corrosion resistance is much worse than that of hot-dip galvanized pipes. Most of the regular galvanized pipe manufacturers do not use electro-galvanization (cold plating) in order to ensure quality.
In order to improve the corrosion resistance of steel pipes, general steel pipes are galvanized. Galvanized steel pipes are divided into two types: hot-dip galvanizing and electro-galvanizing. The hot-dip galvanizing layer is thick, the cost of electro-galvanizing is low, and the surface is not very smooth. Oxygen Blowing Welded Pipe: Used as a steel-making oxygen blowing pipe, generally small-diameter welded steel pipes with eight specifications ranging from 3/8 to 2 inches. It is made of 08, 10, 15, 20 or 195-Q235 steel strip. In order to prevent corrosion, some must be effectively aluminized.
Black parts inspection → hanging material → degreasing → rinsing → pickling → cleaning → dipping flux → hot air drying → hot dip galvanizing → blowing inside and outside → cooling → passivation and rinsing → unloading → inspection, finishing → typing mark →Packing, storage and transportation.
Galvanized tape → uncoiling → stretching → coiling tube → welding → scarring → passivation and rinsing → zinc replenishment → shaping → typing logo → cutting → packaging → drying → weighing.
Galvanized steel pipe use: Hot-dip galvanized steel pipe is widely used in manufacturing industries such as construction, machinery, coal mines, chemicals, electric power, railway vehicles, automobile industry, highways, bridges, containers, sports facilities, agricultural machinery, petroleum machinery, and prospecting machinery.
It is also used as oil well pipes and oil pipelines in the petroleum industry, especially offshore oilfields, oil heaters, condensing coolers, coal distillate wash oil exchangers of chemical coking equipment, pipe piles for trestle bridges, pipes for support frames in mine tunnels, etc.