Characteristics of Square tube:
1. Structural stability: The cross-sectional shape of the square tube makes it evenly distributed under force, has good bending resistance and compression resistance, and is suitable for use as structural parts and supports.
2. High strength: The square tube has high tensile strength and impact resistance, and can withstand large loads.
3. Corrosion resistance: Stainless steel square tube has strong corrosion resistance and is suitable for structural applications in outdoor or humid environments.
4. Light weight: The weight of the square tube is relatively light. Under the premise of ensuring the strength, it can reduce the overall weight of the structure, which is conducive to construction and installation.
5. Strong aesthetics: The square tube has a regular shape and a smooth surface. After proper treatment, it has a beautiful appearance. It is suitable for buildings and furniture that require appearance.
6. Diversity and flexibility: Square tubes have a variety of specifications and sizes, which can be customized according to specific needs, and have a wide range of applications.

Manufacture and Specifications of Square tube:
Square tubes are usually manufactured by cold drawing, cold rolling or welding processes, and the performance and application scenarios of square tubes vary depending on the manufacturing process. Common square tube specifications include:
Side length: from 10mm to 500mm.
Wall thickness: from 0.5mm to 20mm.
The specification selection of the square tube mainly depends on the specific engineering requirements and the use environment.

Application of square tube:
Construction engineering: square tube is widely used in the frame structure of buildings, pillars, bridges and other structural parts to provide strong support.
Machinery manufacturing: square tube is used to manufacture the frame, bracket and transmission device of mechanical equipment to ensure the stability and durability of the equipment.
Automobile manufacturing: In automobile manufacturing, square tubes are used to make the frame and carriage structure, and to improve the overall strength and safety of the vehicle.
Furniture production: square tubes are often used to make furniture frames, such as tables, chairs, bookshelves, etc., with light, beautiful and durable characteristics.
Other applications: square tubes are also widely used in sports equipment, agricultural machinery, chemical equipment, aerospace and other fields.

Processing and installation of square tube:
Square tube can be processed by cutting, welding, drilling, bending and other methods, which is suitable for the manufacture of various complex structures. During installation, the square tube can be used in combination with other materials by bolting, welding or other means to form a stable structure.

Protection and Maintenance of square tube:
Square pipes need surface treatment during production and use, such as galvanizing, painting or other anti-corrosion treatment to extend their service life. For square pipes used outdoors, regular inspection and maintenance are also essential to ensure their long-term stability and safety.

Advantages of square tube:
1. Strong durability: square tube of high strength, good corrosion resistance, suitable for various environments.
2. Beautiful and generous: the appearance of the square tube is regular and smooth, suitable for applications that require beautiful appearance.
3. Convenient installation: square tube light weight, easy processing, convenient construction and installation.
4. Economy: The square tube has a high cost performance and has been widely used in a variety of engineering and manufacturing fields.

In general, square tubes have become important materials in construction, machinery manufacturing, automobile industry, furniture production and other fields because of their superior mechanical properties, durability and aesthetics, and are widely used in various engineering and manufacturing projects.