Galvanized Square Steel Pipe Specifications
Hot dip galvanized square tube is a steel pipe product that has undergone special processing. Its production process involves immersing the square tube in molten zinc liquid, causing a chemical reaction between zinc and the steel surface, thereby forming a dense layer of zinc on the surface of the steel pipe. The following is a detailed analysis of hot-dip galvanized square rectangular pipes:
Pre treatment: Steel pipes first need to be pickled to remove surface iron oxide and other impurities. Then, further cleaning is carried out by mixing ammonium chloride and zinc chloride aqueous solution to ensure that the surface of the steel pipe is clean and free of dirt.
Hot dip plating: The pre treated steel pipe is sent into a hot dip plating tank, which contains molten zinc solution. Soak the steel pipe in zinc solution for a period of time to allow the zinc to fully react with the surface of the steel, forming a zinc iron alloy layer.
Cooling and post-treatment: The galvanized steel pipe is taken out from the zinc solution and cooled. Other post-processing steps such as cleaning, passivation, etc. may be carried out as needed to improve the corrosion resistance and surface quality of the steel pipe.
| Product | Galvanized Square and Rectangular Steel Pipe |
| Material | Carbon Steel |
| Grade | Q195 = S195 / A53 Grade A Q235 = S235 / A53 Grade B / A500 Grade A / STK400 / SS400 / ST42.2 Q345 = S355JR / A500 Grade B Grade C |
| Standard | DIN 2440, ISO 65, EN10219GB/T 6728
JIS 3444 /3466 ASTM A53, A500, A36 |
| Surface | Zinc coating 200-500g/m2 (30-70um) |
| Ends | Plain ends |
| Specification | OD: 20*20-500*500mm ; 20*40-300*500mm Thickness: 1.0-30.0mm Length: 2-12m |
Youfa Galvanized Square Steel Pipe Advantages and Usages
Strong corrosion resistance: The zinc layer on the surface of hot-dip galvanized square tube can effectively prevent corrosion of steel by oxygen, acidic and alkaline liquids, salt spray and other environments, thereby extending the service life of the product.
Uniform coating: Through the hot-dip coating process, a uniform zinc layer can be formed on the surface of the square tube to ensure consistent corrosion resistance of the entire steel pipe.
Strong adhesion: The zinc layer forms a tight bond with the steel surface through chemical reactions, with strong adhesion and resistance to peeling.
Good processing performance: Hot dip galvanized square tube has good mechanical and processing properties, and can be formed into various shapes such as cold stamping, rolling, drawing, bending, etc. without damaging the coating.
Application:
Construction / building materials steel pipe
Structure pipe
Fence post steel pipe
Solar mounting components
Handrail pipe
Strict Quality Control:
1) During and after production, 4 QC staffs with more than 5 years experience inspect products in random.
2) National accredited laboratory with CNAS certificates
3) Acceptable inspection from third party appointed/paid by buyer, such as SGS, BV.
4) Approved by Malaysia, Indonesia, Singapore, Philippines, Australia, Peru and UK. We own UL /FM, ISO9001/18001, FPC certificates
Packing and Delivery:
Packing Details : in hexagonal seaworthy bundles packed by steel strips, With two nylon slings for each bundles.
Delivery Details : Depending on the QTY, normally one month.
About us:
Tianjin Youfa Steel Pipe Group Co., Ltd was founded on July 1st, 2000. There are totally about 9000 employees, 13 factories, 293 steel pipe production lines, 3 national accredited laboratory, and 1 Tianjin government accredited business technology center.
12 hot galvanized square and rectangular steel pipe production lines
Factories:
Tianjin Youfa Dezhong Steel Pipe Co.,Ltd;
Handan Youfa Steel Pipe Co.,Ltd;
Shaanxi Youfa Steel Pipe Co., Ltd
