What is hot-dip galvanized square pipe?
what is it used for?
Hot-dip galvanized square tubes are square tubes made of steel plates or steel strips that are curled and then welded. After a series of chemical reactions in a hot-dip galvanizing bath, the square tubes are formed into square tubes; they can also be hot-rolled or cold-rolled galvanized steel. It is a hollow square-section steel pipe made by cold bending and then high-frequency welding. The production process of hot-dip galvanized square tubes is simple, the production efficiency is high, there are many varieties and specifications, and the equipment investment is low, but the general strength is lower than that of seamless square tubes.
Hot-dip galvanized square tubes are divided into seamless and welded seams. Seamless square tubes are made by extruding seamless round tubes.
The surface of hot-dip galvanized square pipe is bright and beautiful, and can be directly used in projects according to needs. Hot-dip galvanized square tubes are generally judged based on their appearance. If there are missing plating, pitting, white spots, heavy skin, bubbles, green spots on the outer wall surface of the square tube and the frequency is too high, it will be judged as an unqualified product. However, product standards have a specified range for product deviations, that is, the "permissible deviation" of size.
Due to its excellent performance, hot-dip galvanized square tubes are often used in: glass curtain walls, power towers, communication grids, water and gas transmission, wire casings, houses, bridges, metal structures, power transmission, etc. In recent years, a large number of land was adopted.
Since the 1930s, with the rapid development of high-quality hot-dip galvanized square pipe production and the advancement of welding and inspection technology, the quality of welds has continued to improve, and the varieties and specifications of welded steel pipes have increased day by day, and they have replaced steel pipes in more and more fields. Seamless steel pipe.
