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What Is A Rectangular Tube Called?

Jul 3,2026

Understanding what a rectangular tube is called

A rectangular tube is commonly called a rectangular steel tube. It is also known as a rectangular hollow section. Engineers often shorten this term to RHS. It belongs to structural steel hollow sections used in construction and engineering. It provides high strength and stable structural performance. The shape includes four closed sides for better load distribution. This design improves torsional resistance and bending strength. Many industries use it in load bearing frameworks. It is widely recognized in global steel standards. Different regions may use slightly different names. However, all terms describe the same structural product form.

Common names in industry

Rectangular tubes are known by several different names in global markets. These names depend on engineering standards and regional practices. Buyers and engineers often use different terms in projects.
1.rectangular steel tube 
2.rectangular hollow section 
3.structural steel tube 
4.box section 
5.hollow structural section 
All these names refer to the same product type. They only differ in terminology and standard systems. This helps international communication in steel procurement. It also ensures compatibility across engineering designs. In global trade, clarity in naming improves project efficiency.
rectangular steel tube

Material and strength advantages

A rectangular steel tube delivers strong mechanical performance in many applications. As a leading steel pipe manufacturer, we produce high quality structural solutions. Our products use premium grades like Q235B and S355JR steel. These materials ensure stable performance under heavy load conditions. The product can be supplied as black steel tube for general use. It can also be produced as hot dip galvanized tube for corrosion resistance. The mechanical properties support demanding engineering environments.
(1)tensile strength between 470 and 630 MPa 
(2)yield strength of 355 MPa or higher 
(3)excellent weldability for fabrication 
(4)strong corrosion resistance after galvanizing 
(5)optimized strength to weight ratio 
These features make the tube suitable for modern structural systems. It also improves construction efficiency and reduces material waste. The smooth surface supports easy cutting and welding. This makes it ideal for prefabricated steel structures.

Applications across industries

Rectangular steel tube products are widely used in many industries. Their strength and flexibility make them suitable for multiple engineering needs. They support both light and heavy structural systems.
① building and construction frameworks 
② industrial machinery structures 
③ bridge and infrastructure projects 
④ transportation equipment systems 
⑤ solar energy mounting structures 
These applications rely on stability and durability. Rectangular tubes provide consistent performance in all environments. They also help reduce overall construction costs. Engineers choose them for reliable long term use.
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Why choose Yuantai Derun as steel pipe manufacturer

Tianjin Yuantai Derun Steel Pipe Group is a leading global steel pipe manufacturer. The company specializes in rectangular steel tube and structural steel products. It was founded in 2002 in Tianjin Daqiuzhuang Industrial Zone. This region is the largest steel pipe production base in China. The group holds strong industry reputation and global certifications.
The company operates large scale integrated production systems. It supports manufacturing, logistics, and international trade. This ensures stable supply and fast delivery for global customers. Its advantages include advanced production capacity and strict quality control.
1.65 ERW and HFW production lines 
2.26 galvanizing production lines 
3.18 subsidiaries across the group 
4.ISO9001, ISO14001, and OHSAS18001 certifications 
5.CE, BV, JIS, DNV, ABS, and LEED compliance 
6.more than 100 patented technologies 
7.1,600 acre production base with 2,200 plus employees 
The company produces black steel tube and hot dip galvanized tube products. It also offers wide dimensional ranges for global projects. Products meet ASTM, EN, and GB international standards. The strong supply chain ensures stable raw material sourcing from major steel mills. These include HBIS, Baosteel, and TPCO. This guarantees consistent quality and performance.
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As a trusted steel pipe manufacturer, Yuantai Derun focuses on innovation and sustainability. It promotes green development in the steel industry. It also supports global infrastructure with high quality hollow section products. Customers benefit from reliable service and long term cooperation.
A rectangular tube is widely known as a rectangular steel tube or rectangular hollow section. It plays a key role in modern construction and engineering. Its strength, versatility, and efficiency make it a preferred structural material. Choosing a reliable steel pipe manufacturer ensures stable quality and long term performance. Yuantai Derun provides advanced production, global standards, and strong service support. We welcome global customers to choose our rectangular steel tube, black steel tube, and hot dip galvanized tube products for their projects.
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Yuantai team has over 21 years of experience in steel pipe project applications, specializing in the production, manufacturing, and customization of square rectangular, and circular steel pipes. Warmly welcome project procurement managers, individual owners, designers, and overall sellers, etc. Write down your requirements and receive professional quotes and technical support.
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