Tianjin Baosheng square tube hot-rolled and cold drawn square steel tube structure with galvanized square rectangular tube

Description :

  Square tube is a lightweight thin-walled steel pipe with a hollow square cross-section, also known as a cold-formed steel profile. It is a square section steel with dimensions made by cold bending Q235 hot-rolled or cold-rolled strip or coil as the base material, and then high-frequency welding. Tianjin Baosheng square tube mainly solves the demand for high-strength and lightweight support materials in building structures, mechanical manufacturing, and decoration engineering. Typical working conditions include the construction of steel structure factory skeleton, mechanical equipment base frame, curtain wall support keel, and agricultural greenhouse skeleton. This product has good plasticity, welding performance, and cold working performance, and can withstand large static loads and certain dynamic loads. It is an indispensable basic structural material in modern industrial and construction fields.

  Tianjin Baosheng square tube has a wide range of specifications, with common side lengths ranging from 20mm to 500mm and wall thicknesses typically between 1.0mm and 20mm, depending on whether the production process is hot rolling or cold drawing. In terms of material, carbon structural steels such as Q195, Q215, Q235B are commonly used, and low-alloy high-strength steels such as Q345B can be selected for some special purposes. The implementation standards mainly include GB/T 6728-2017 "Cold formed hollow section steel for structural use" and GB/T 3094-2012 "Cold drawn special-shaped steel pipes". The surface treatment process includes black material (uncoated), hot-dip galvanizing, electroplating galvanizing, and spray coating. The thickness of the hot-dip galvanizing layer is usually not less than 65 μ m, which can effectively improve the corrosion resistance of square pipes in humid environments, extend their service life, and ensure the stability of engineering quality.

  When selecting Tianjin Baosheng square tube, it is necessary to clarify the stress conditions and environmental requirements of the usage scenario. For steel structures with large load-bearing capacity, it is recommended to use hot-rolled square tubes with thick wall thickness and made of Q235B or Q345B material, which have high dimensional accuracy and good strength; For decorative keels or lightweight brackets, cold drawn square tubes or galvanized square tubes with thinner wall thickness can be selected to reduce costs and facilitate processing. Attention should be paid to distinguishing between square tubes and rectangular tubes. Although the production processes of the two are similar, their cross-sectional aspect ratios are different, and their stress characteristics are also different. If used in outdoor exposed environments, hot-dip galvanized products must be selected to avoid using black materials for rust prevention. When purchasing, special attention should be paid to dimensional tolerances, straightness, and weld quality to ensure compliance with national standards.

  When installing Tianjin Baosheng square tube, welding, bolt connection or specialized connectors are usually used for fixation. Before welding, it is necessary to clean the oil and rust at the interface to ensure that the weld seam is full and free of pores. After welding, anti-corrosion repair treatment is required. In daily maintenance, it is necessary to regularly check whether the connection nodes of structural components are loose, whether the surface coating has peeled off or rusted, and especially the damaged parts of the galvanized layer should be repaired with zinc rich paint in a timely manner. In high-frequency vibration environments, it is recommended to add shock-absorbing pads or reinforcement bars to improve structural stability. Common faults include local buckling deformation, weld cracking, and severe corrosion. If such problems are found, they should be immediately stopped and reinforced or replaced to ensure the safety and reliability of the overall structure.

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