In the field of steel structures, ordinary square tubes and refined steel are two common structural profiles, which have significant differences in appearance, processing technology, fire resistance, and structural stability. There are significant differences between ordinary square tube profiles and refined steel in construction projects, which are mainly manifested in the following aspects:

1. Appearance and design flexibility

The appearance of ordinary square tubes is single, generally square or rectangular, and cannot meet the requirements of component manufacturing with special-shaped and complex sections. The appearance is thick and bulky, with an obvious R angle and poor aesthetics.

Refined steel has a rich appearance design, and can customize steel structure profiles of different shapes and sections according to the requirements of architectural designers. It is flexible and diverse, without an R angle, and more three-dimensional and beautiful.

2. Processing technology and precision requirements

The production process of ordinary square tubes is relatively simple, and traditional processing technologies such as cold bending or hot rolling are mostly used, without post-processing, resulting in a rough surface, poor flatness, and straightness.

The processing technology of refined steel is generally divided into two types: thin-walled cold-bent refined steel and assembled welded refined steel. Thin-walled cold-bent refined steel is directly processed by roll forming from steel plates with a wall thickness of less than or equal to 3mm. Assembled welded refined steel is laser cut and processed through processes such as laser-automated assembly and welding.

Whether it is cold-bent refined steel or assembled welded refined steel, after the cross-section assembly is completed, it needs to go through multiple processes again to make the final product. For example, multiple straightening treatments for straightness, anti-corrosion sandblasting and rust removal pretreatment, repeated grinding and polishing treatments for flatness, multiple surface anti-corrosion spraying treatments, etc.

3. Fire resistance and corrosion resistance

Ordinary square tube surface treatment generally adopts hot-dip galvanizing, electroplating, and other processes and the corrosion resistance is general and cannot meet the use requirements in special environments.

Refined steel can be customized according to the fire protection requirements of the building. The surface treatment adopts a variety of anti-corrosion processes, with stronger corrosion resistance, suitable for use in complex environmental conditions.

4. Structural stability and safety

Ordinary square tubes are prone to cracking at the corners when subjected to force, have low torsion resistance, are prone to cracks at welding sites, and have poor safety performance.

Refined steel has higher strength and stability, can withstand greater loads, and improves the overall safety and stability of the building. The welding process uses a double-head robot for automatic welding to ensure welding quality and safety.