The rectangular pipe is a common pipe with a rectangular cross-section and high strength and rigidity. It is widely used in construction, machinery, automobiles, aerospace, and other fields. Here are some common uses for rectangular tubing:

1. Building structure: Rectangular tubes are often used in columns, beams, bridges, and other parts of building structures, and their strength and rigidity can meet the load-bearing requirements of buildings. At the same time, the rectangular tube has a beautiful appearance and can be used as a decorative material for buildings.

2. Mechanical manufacturing: Rectangular tubes can be used to manufacture mechanical parts, such as machine beds, bearing brackets, drive shafts, etc. The high strength and rigidity of the rectangular tube can ensure the stability and durability of mechanical parts.

3. Automobile manufacturing: Rectangular tubes can be used in automobile frames, chassis, bodies, and other parts, and their strength and rigidity can meet the safety requirements of automobiles. At the same time, the lightweight design of the rectangular tube can reduce the weight of the car and improve fuel economy.

4. Aerospace: Rectangular tubes can be used to manufacture structural components of aircraft, rockets, and other aerospace vehicles, such as fuselage, wings, empennage, etc. The high strength and lightweight design of rectangular tubes can improve the performance and efficiency of aircraft.

5. Pipeline transportation: Rectangular pipes can be used in pipeline systems for conveying liquids, gases, and other media. The cross-sectional shape of the rectangular tube can adapt to different fluid flow characteristics, while its high strength and corrosion resistance can ensure the safety and reliability of the piping system.

6. Road guardrails: Rectangular tubes can also be used to make road guardrails. The rectangular tube has high strength and can effectively protect pedestrians and vehicles from traffic accidents.

In a word, the rectangular tube has a wide range of application fields and uses, and its high strength, rigidity, lightweight design, and beautiful appearance make it one of the important materials in all walks of life.