Process characteristics and applications of rectangular tube

Date:2024-05-17Tags:rectangular tube, seamless steel pipe

What is a rectangular tube?

Rectangular tube refers to a hollow metal profile with a rectangular or square cross-section, which is used in construction, machinery manufacturing, shipbuilding, hardware, steel structure engineering and other industries.Rectangular tube is a hollow square cross-section lightweight thin-walled steel tube, also known as steel cold-formed profile. It is a square section steel with a square cross-section shape and size made of Q235 hot-rolled or cold-rolled strip or coil as the base material, cold bending and then high-frequency welding. In addition to the thickening of the wall thickness, the corner size and edge straightness of hot-rolled extra thick-walled square tubes reach or even exceed the level of resistance welded cold-formed square tubes. In recent years, rectangular tubes, as an important structural material, have been widely used in construction, machinery manufacturing, transportation, aerospace and other fields with their unique shapes and excellent properties. With the advancement of science and technology and the diversification of market demands, the technology of rectangular tubes has been continuously innovated, further enhancing its application value and market competitiveness. This article will introduce in detail the characteristics, technological innovations, and applications and impacts of rectangular tubes in various fields.

rectangular tube

What are the process characteristics of rectangular tubes?

The advanced rectangular pipe technology uses world-class CNC equipment for pipe production. Computer software programming only needs to input the relevant data of the air duct shape. In a few seconds, the shape, component quantity and data connection of each accessory will be automatically generated and sent to the plasma cutting. The machine automatically unloads materials. The forms of air ducts are diverse. Complete specifications bring convenience to design and selection and meet the needs of different HVAC engineering systems. Good interchangeability, accurate dimensions, standard pipe fittings and easy replacement. The appearance and inner wall are smooth and smooth. From the perspective of the appearance of the product, the appearance is smooth and beautiful. From the perspective of air duct performance, the smooth and streamlined inner wall makes the wind resistance of the air duct small.Rectangular tubes are classified into seamless steel pipe and welded steel pipe (seamed pipe), hot-rolled seamless steel pipe, cold-drawn seamless steel pipe, extruded seamless square pipe, and welded square tubes. Like other steel pipe materials, the production of rectangular steel pipes is also based on national standards or industry standards, so width, height and wall thickness are generally some commonly used dimensions. Next, the editor will introduce to you the process characteristics of rectangular tubes.:

High strength and rigidity: The cross-sectional shape of the rectangular tube enables it to exhibit higher strength and rigidity under stress, making it especially suitable for structures that bear larger loads.

Light weight: The hollow design allows the rectangular tube to reduce its own weight while maintaining strength, improving material utilization and structural economy.

Good corrosion resistance: Through surface treatment, such as galvanizing, spray painting, etc., rectangular pipes can effectively resist corrosion and extend service life.

Easy to process and connect: Rectangular pipes can be processed and connected through various methods such as welding and bolting, giving them high construction flexibility.


What are the application scenarios of rectangular tubes?

Rectangular tube is a hollow long steel material, also known as flat tube, flat square tube or square flat tube (as the name implies). They are widely used as pipelines for transporting fluids, such as oil, natural gas, water, coal gas, steam, etc. In addition, they are lighter in weight when the bending and torsional strength are the same, so they are also widely used in the manufacture of mechanical parts and engineering structures. It is also commonly used to produce various conventional weapons, gun barrels, artillery shells, etc. Rectangular tubes are widely used in the construction field, especially in high-rise buildings and long-span structures. The following are some usage scenarios.

High-rise buildings: Rectangular tubes are widely used in frame structures of high-rise buildings due to their high strength and rigidity. Using rectangular tubes as the main load-bearing structure can reduce the cross-sectional size of columns and increase the use space of the building.

Bridges and long-span structures: Rectangular tubes are also widely used in bridges and long-span structures. Its excellent compressive and bending resistance enables it to effectively bear and distribute loads, ensuring the stability and safety of the structure.

Decorative structure: In the field of architectural decoration, rectangular tubes are often used in curtain walls, railings, decorative frames, etc. due to their simple and beautiful appearance. Through different surface treatments, rectangular tubes can meet a variety of decorative needs and enhance the aesthetics of the building.

Mechanical equipment frames: Rectangular tubes are often used to manufacture frames and brackets for mechanical equipment. Their high strength and rigidity ensure the stability and durability of the equipment.

Conveying equipment: In conveying equipment, rectangular tubes are used to manufacture conveyor racks and support structures. Their lightweight design helps improve conveying efficiency and reduce energy consumption.

Agricultural machinery: Rectangular tubes are also widely used in agricultural machinery, such as the skeletons and structural parts of tractors, harvesters and other equipment. Its excellent durability and easy processability improve the service life and work efficiency of the equipment.

Automobile manufacturing: Rectangular tubes are used to manufacture automobile frames, body structural parts, etc. Its high strength and lightweight properties help improve vehicle safety and fuel efficiency, and reduce energy consumption and emissions.

Aerospace: In the aerospace industry, rectangular tubes are used to make structural parts for aircraft and spacecraft. Its excellent mechanical properties and corrosion resistance ensure the stability and safety of aerospace vehicles in complex environments.


Rectangular tubes, with their unique advantages and wide range of applications, provide important support for the development of many industries. Through continuous technological innovation and application expansion, rectangular tubes will continue to play a key role in future industry and construction, helping economic prosperity and social progress. With the recovery of the global economy and the advancement of science and technology, the rectangular tube industry will surely usher in more brilliant development prospects in the future.

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