Galvanized square tubes are hollow square-section steel pipes with square cross-section shapes and sizes, made by cold bending processed from hot-rolled or cold-rolled galvanized strip or coil, and then high-frequency welded. Alternatively, pre-bent hollow square-section steel pipes can be hot-dip galvanized to produce galvanized square tubes.

Galvanized square tubes are categorized by production process into hot-dip galvanized square tubes and cold-dip galvanized square tubes.
Hot-Dip Galvanized Square Pipes: These are square pipes焊接from steel plates or steel strip coiled and formed, followed by placing the pipes in a hot-dip galvanizing bath where they undergo a series of chemical reactions to form the final product. The production process for hot-dip galvanized square pipes is relatively simple and highly efficient, offering a wide variety of sizes and types. The equipment and capital required for this type of pipe are minimal, making it suitable for small-scale hot-dip galvanized square pipe manufacturers.
Cold galvanized square tube: It utilizes the principle of cold galvanizing to impart corrosion resistance to the square tube. Unlike hot galvanizing, cold galvanized coatings primarily rely on electrochemical principles for corrosion prevention, necessitating thorough contact between the zinc powder and steel to generate an electrode potential difference. Thus, surface treatment of the steel is crucial.

Galvanized Square Pipes: Advantages in Construction Projects

1. Durable and Long-lasting: In suburban environments, the hot-dipped galvanized anti-rust coating can maintain its integrity for over 50 years without the need for repairs; in urban areas or near coastal regions, the zinc coating can last up to 20 years without maintenance.
2. Enhanced Reliability: The bond between the galvanized layer and the steel is metallurgical, making zinc an integral part of the steel surface, thus offering better durability for the coating.
3. Enhanced Tensile Strength: The galvanized layer forms a unique metallurgical structure that can withstand mechanical damage during transportation and use.
4. Each part of the galvanized square tube can be zinc-coated, even in concave areas, sharp corners, and hidden spots, providing comprehensive protection.

Application Scope
Due to the galvanized treatment applied to square tubes, the application range of galvanized square tubes has been greatly expanded compared to plain square tubes. They are primarily used in curtain walls, construction, machinery manufacturing, steel construction projects, shipbuilding, solar panel supports, steel structure projects, power engineering, power plants, agricultural and chemical machinery, glass curtain walls, automotive undercarriages, airports, and more.