Types Of Structural Sections
• Square Structural Tube
Square hollow section, also knowm as SHS. it provides good stability in both horizontal and vertical directions, and is not easy to deform under pressure.The flat surface is convenient for cutting, bending, welding and other processing operations, and is easy to connect with other components.
• Rectangular Structural Tube
Rectangular hollow sections (RHS) are often used in mechanical, structural, and construction work, just like square hollow sections. The pipe’s flat surface is more cost-effective for joining and other fabrication work.
• Circular Structural Tube
CHS is made by rolling a flat steel sheet into a circular shape at a certain radius and then welding the seam. Widely used in construction Industry, parts and other fields. It is often used in the production of furniture such as tables, chairs, and beds to make legs and frames.
Specifications Of Hollow Structural Sections
The pipe manufacturing process makes a precise hollow section. It is strong enough to ensure the structure’s integrity. The production standards are strictly followed in manufacturing. It is available in different steel grades as well. These hollow sections are highly efficient and are used in various engineering and construction applications.
| NAME | Structural Tube |
| Standard | API, ASTM, BS, EN, JIS, DIN… |
| Shape | Round, Square, Rectangular |
| Steel Material | Carbon steel, Alloy steel |
| Length | 1-12m or customized |
| Wall Thickness | 1mm -8mm or customized |
| Tolerance | As per different standard |
| Manufacturing Process | ERW, ERW&COLD DRAWN |
| Pipe Ends | Plain End, Beveled End, Threaded, Grooved |
| Pipe Surface | Varnishing, Oiling, Hot Dip Galvanizing, Pre Galvanized, Powder Coated, Electro-Galvanized |
| Joint Method | Fitting, Joiner, Clamp, Pipe Shoulder, Welding,Thread |
| Application | Structure, Construction, Mechanical, Fitness Equipment and Water transport, Mining, Steel Furniture, Green House… |
Seamless Vs. Welded Pipe
Seamless pipes are made from high-quality steel. It is cast into a round shape and then pierced at the center. Then, it goes through rolling and heat treatment. After that, it is cut into different sizes based on the need. These pipes are devoid of any welding joint, which enhances their structural integrity. Seamless pipes are durable. They can handle high heat and pressure. They also resist corrosion. They have uniform properties throughout their length, making them better than welded pipes.
| Seamless Pipe | Welded Pipe |
| Expensive than welded pipe | Cheaper option compared to seamless pipes |
| No welding seam on the tube | It has welding seam on tube |
| Made of solid round bars | The main raw material is steel coils and strips |
| With high OD and ID tolerance | High production efficiency |
| Can bear high-pressure | Thickness tolerance is moderately precise. |
| Thickness tolerance is stable and accurate | Used for low/ medium pressure applications |
Structural Tubes Applications
Construction Industry: It is used as columns and braces in portal frame structures. It is also suitable for making scaffolding, stair railings, and decorative columns.
Mechanical Manufacturing: It is used to make mechanical parts such as shafts and hydraulic cylinders.
Transportation Industry: In the construction of vehicles and ships, CHS is used for making frames, guardrails, and some supporting structures.
Furniture Manufacturing: It is often used in the production of furniture such as tables, chairs, and beds to make legs and frames.
