You are welcomed to come to our factory to buy the latest selling, low price, and high-quality Pengfa Galvanized Square Square Pipe. The basic process is as follows:
1. Spray the plastic powder evenly on the heated steel after heating and melting at high temperature first.
2. Then control the temperature of the extruder head at about 210-230°C.
3. After a certain period of curing, the coating is formed.
4. The coating thickness is generally 0.5-1.0mm.
You can rest assured to buy Pengfa Galvanized Square Square Pipe from our factory. Galvanized Square Square Pipe are divided into cold-galvanized steel pipes and hot-dip galvanized steel pipes. Cold-galvanized steel pipes have been banned, and the latter has been advocated by the state to be used temporarily. In the 1960s and 1970s, developed countries in the world began to develop new pipes and gradually banned galvanized pipes.
Four ministries and commissions, including the Ministry of Construction of China, have also issued a document stating that galvanized pipes should not be used as water supply pipes since 2000. Galvanized pipes are rarely used for cold water pipes in newly built communities, and galvanized pipes are used for hot water pipes in some communities. Hot-dip Cold-dip Galvanized Pipe are widely used in fire protection, electric power and highways.
The hot-dip Galvanized Square Square Pipe reacts the molten metal with the iron substrate to produce an alloy layer, so that the substrate and the coating are combined. Hot-dip galvanizing is to pickle the steel pipe first. In order to remove the iron oxide on the surface of the steel pipe, after pickling, it is cleaned by ammonium chloride or zinc chloride aqueous solution or a mixed aqueous solution of ammonium chloride and zinc chloride, and then sent to hot-dip coating tank.
Hot-dip galvanizing has the advantages of uniform coating, strong adhesion and long service life. The hot-dip galvanized steel pipe substrate undergoes complex physical and chemical reactions with the molten plating solution to form a corrosion-resistant zinc-iron alloy layer with a tight structure. The alloy layer is integrated with the pure zinc layer and the steel pipe substrate, so it has strong corrosion resistance.
Cold-dip Galvanized Square Square Pipe is electro-galvanized, and the amount of galvanizing is very small, only 10-50g/㎡, and its corrosion resistance is much worse than that of hot-dip galvanized pipe. The galvanized pipe manufacturer of the track, in order to ensure the quality, the large purchase of JDG threading pipe does not use electro-galvanizing (cold plating). Only small companies with small equipment and outdated equipment use electro-galvanized steel, of course, their prices are relatively cheaper. The Ministry of Construction has officially laid down the cold-dip galvanized pipes with backward technology, and the cold-dip galvanized pipes are not allowed to be used as water and gas pipes.
The galvanized layer of cold-dip galvanized steel pipe is an electroplated layer, and the zinc layer is independently layered with the steel pipe substrate. The zinc layer is relatively thin, and the zinc layer is easily attached to the steel pipe substrate and is easy to fall off. Therefore, its corrosion resistance is poor. In newly built houses, it is forbidden to use cold-galvanized steel pipes as water supply pipes.
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Galvanizing can increase the corrosion resistance of steel pipes and prolong their service life. Galvanized Square Square Pipe are widely used in construction, machinery, coal mines, electric power, railway vehicles, automobile industry, highways, containers, sports facilities, agricultural machinery, petroleum machinery, mining machinery, greenhouse construction, in addition to water, gas, oil, etc. In addition to general low-pressure fluid line pipes, they are also used as oil well pipes and oil pipelines in the petroleum industry, especially in offshore oil fields, oil heaters, condensing coolers, and pipes for coal distillation oil exchangers in chemical coking equipment, as well as trestle piles and mines. The supporting frame of the tunnel, etc.