What are the uses and acceptance criteria of galvanized square pipes?

Galvanized square and rectangular tubes are also known as square and rectangular frame cold drawn hollow channel steel, commonly known as square steel tubes and rectangular square tubes. Galvanized square pipe is a name for square pipe fittings and rectangular frame pipe fittings, that is, seamless steel pipes with the same circumference. It is produced by hot-rolled strip steel through processing technology. Generally, the hot-rolled strip steel is unpacked, leveled, rolled, and electric welded to form a round steel pipe, which is then cold-rolled from the round steel pipe into a rectangular square pipe and then cut into required lengths.

Square steel pipe has wide application coverage
Judging from the current application scope, it is mainly widely used in curtain wall glass, power towers, communication power networks and other fields. In recent years, it has been widely used in many regions and fields, which fully proves that the quality of galvanized steel pipes is very good. It also brings a lot of convenience during the use process, and it can indeed be used better.
What is the tensile and compression resistance of galvanized square and rectangular pipes?

Generally speaking, choosing products provided by better galvanized square and rectangular pipe manufacturers can ensure more outstanding performance in terms of compression and tensile resistance. Whether it is used as an oil pipeline or as a pipe for special purposes, it must have more outstanding performance in terms of mechanical strength to be better.
What is the forming method of seamless square and rectangular tubes?
The hollow defect is that the upper tube is bent/the hollow bending side is synchronized with the timing. Due to the pressure of the upper roller and the lower roller, the forming force is simply beyond the zero boundary point, causing concave instability at the edge. In addition, it is also It reflects the stable control module and the operation process that creates quality. It is the opposite characteristic of rectangular tubes and the bending of the tubes caused by the gas. When the telescoping diameter is unstoppable the solid body can be bent, for example a rectangular top tube/spine bending synchronization and finishing gas bending strength is stopped. Gas bending can also be bent outside corners of < 0.2 tons and is not easy to solve the wall.
Basic principles of hot-dip galvanized square pipe processing technology
Galvanized pipes include hot-dip galvanized square pipes and electro-galvanized pipes. Hot-dip galvanized square pipes include wet method, dry method, iron ore method, redox reaction method, etc. The main difference between different hot-dip galvanizing methods is how to activate the surface of the pipe body after acid leaching cleaning of the seamless steel pipe to improve the hot-dip galvanizing quality. Dry and redox reaction methods are mainly used in current manufacturing, and their characteristics are shown in the table. The surface of the phosphated zinc layer is very smooth, high-density, and well-proportioned; it has excellent physical properties and corrosion resistance; zinc consumption is 60% to 75% lower than hot-dip galvanizing. Phosphating treatment has certain technical diversity, but this method must be used for single-layer coatings, double-sided coatings with different thicknesses of inner and outer coatings, and hot-dip galvanizing of thick-walled pipes.
The main reason for the corrosion of galvanized square pipes is the layer of zinc on the surface.
The main reason for the corrosion of galvanized square pipes is the layer of zinc on the surface. The physical properties of zinc are relatively bright. It can dissolve acid and alkali. In a humid environment, zinc will react organically and form a basic zinc carbonate film on the surface. When it comes into contact with substances containing hydrogen chloride, zinc will The corrosion resistance is reduced and it is easy to be corroded, and then the surface of the thick steel plate appears, and then rusts. Galvanized coils that use phosphating treatment have a lower chance of rusting. Since the phosphating treatment coating is thicker, it is not easy to oxidize the thick steel plate, so it is not easy to rust.
Uses of galvanized square and rectangular pipes
Mainly used in curtain walls, construction, machinery manufacturing, steel construction projects, shipbuilding, solar power generation brackets, steel structure engineering, power engineering, power plants, agricultural and chemical machinery, glass curtain walls, automobile chassis, airports, etc.