Galvanized steel pipe
hot-dip galvanized pipe
Hot dip galvanized pipe is made of molten metal and iron matrix reaction to produce alloy layer, so that the matrix and the coating of the two combination. Hot dip galvanizing is to first pickling the steel pipe. 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 mixed aqueous solution of ammonium chloride and zinc chloride, and then sent into the hot dip plating tank. Hot dip galvanizing has the advantages of uniform coating, strong adhesion and long service life. Complex physical and chemical reactions occur between the matrix of hot-dip galvanized steel pipe and the molten bath in the spay, and a compact zinc-iron alloy layer with corrosion resistance is formed. The alloy layer is integrated with the pure zinc layer and the steel tube matrix, so its corrosion resistance is strong.
cold galvanized pipe
Cold galvanized pipe is electric galvanized, galvanized amount is very small, only 10-50g/m2, its own corrosion resistance than hot galvanized pipe phase leg differential spin. Regular galvanized pipe manufacturers, in order to ensure quality, most do not use galvanizing (cold plating). Only small businesses with obsolete equipment use galvanizing, and of course their prices are relatively cheap. The Ministry of Construction has officially announced the elimination of cold galvanized pipes with outdated technology, and it is not allowed to use cold galvanized pipes as water and gas pipes. The galvanized layer of cold galvanized steel pipe is the electroplating layer, and the zinc layer is independently layered with the steel pipe matrix. Zinc layer is thin, zinc layer is simply attached to the steel tube matrix, easy to fall off. So its corrosion resistance is poor. It is prohibited to use cold galvanized steel pipes as water supply pipes in newly built houses.
Galvanized steel pipe Specification
galvanized steel pipe for building materials
galvanized: 0.8- 25mm.
Electronic Resistance Welded (ERW)
Q235, Q345, S235JR, S275JR, STK400, STK500, S355JR, GR.B-D
BS1139-1775, EN1039, EN10219, JIS G3444:2004, GB/T3091-2001, BS1387-1985, DIN EN10025, ASTM A53 SCH40/80/STD, BS-EN10255-2004
Pre-galvanized, Hot dipped galvanized, Electro galvanized, Black, Painted, Threaded, Engraved, Socket.
ISO 9000-2001, CE CERTIFICATE, BV CERTIFICATE
1.Big OD:in bulk
2.Small OD:packed by steel strips
3.woven cloth with 7 slats
4.according to the requirements of customers
Middle East,Africa, Asia and some Uropean country and South America, Australia
Country of origin
5000Tons per month.
1. Payment terms : T/T ,L/C
2. Terms of trade : FOB ,CFR,CIF ,DDP,EXW
3. Minimum order : 2 tons
4. Delivery time : Within 25 days.
Galvanized steel pipe
Galvanized steel pipe application
galvanized steel pipe is widely used in construction, machinery, coal mine, chemical industry, electric power, railway vehicles, automobile industry, highway, bridge, container, sports facilities, agricultural machinery, petroleum machinery, mining machinery, greenhouse construction and other manufacturing industries.
Rust removal methods edited broadcast
1, first use solvent to clean the surface of the steel, remove the organic matter on the surface,2, then use tools to remove rust (wire brush), remove loose or inclined scale, rust, welding slag, etc.,3. Use pickling.Galvanized is divided into hot plating and cold plating, hot plating is not easy to rust, cold plating is easier to rust
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Our steel products are mainly used in chemical industry, petrochemical industry, offshore, seawater pipeline, desalination plant, nuclear engineering, paper and pulp industry.
Our export country
We are a well known worldwide supply and export industrial pipe in following countries：,Italy, Philippines, France，Ireland, Portugal, Gambia, Thailand, Ukraine, United Kingdom, Netherlands, South Africa, Spain, Turkey, Libya, Romania, Puerto Rico, Azerbaijan, United Arab Emirates, Pakistan, Ghana, Slovakia, Germany, Saudi Arabia, Afghanistan, Bolivia, Switzerland, Bangladesh, Taiwan, Oman, Egypt, Greece, Norway, Singapore, Bulgaria, Estonia, Belgium, Yemen, Hong Kong, Ecuador, Sri Lanka, Nepal, Belarus, Finland, Gabon, Iran, Canada, Argentina, Lebanon.