Tianjin Brisk Steel is one of the manufacturers of Seamless Hollow Section in China. Our products are mainly exported to the Middle East, Southeast Asia, Europe, New Zealand, and other regions.If you would like to learn more about our products, feel free to contact us and send your purchase list.
Specifications
| Item | Details |
|---|---|
| Process | Rotary piercing (Mannesmann-type) + mandrel rolling |
| Standards | ASTM A500, ASTM A106, EN 10210, API 5L |
| Grades | Q345B, S355J2H, ASTM A500 Gr. B/C, API 5L Gr. B |
| Profile types | Circular (CHS) standard; square/rectangular via secondary cold forming |
| Size range | 21.3 mm – 508 mm OD (CHS) |
| Wall thickness | 2 mm – 30 mm |
| Length | 6 m / 12 m standard, custom lengths available |
Key Features
- No weld seam - removes seam toughness and inspection as design variables
- Suitable for combined internal pressure and structural load cases
- Consistent mechanical properties around the full circumference
- Mill test certificates traceable to individual production heats
- Available in round (standard) and cold-formed square/rectangular profiles
Applications
- Offshore & Marine Structures: Jack-up platform legs, subsea support frames, and marine crane booms.
- Heavy Structural Engineering: Stadium roof trusses, long-span bridge supports, high-rise core columns, and seismic-resistant frameworks.
- Industrial & Mining Machinery: Excavator booms, heavy-duty conveyor gantry supports, hydraulic cylinder frameworks, and crushing equipment bases.
- Energy & Power Infrastructure: Wind turbine tubular structures, power plant supports, and solar thermal collector frames.
FAQ
Q: What are the advantages of Seamless Hollow Section?
A: Seamless Hollow Sections offer high strength, excellent pressure resistance, superior toughness, and consistent mechanical properties. Without a weld seam, they provide enhanced reliability in applications requiring heavy loads, high stress, or critical structural performance.
Q: What shapes are available for Seamless Hollow Sections?
A: Seamless Hollow Sections are commonly available in circular, square, and rectangular shapes. Circular seamless tubes are widely used, while square and rectangular seamless sections are available for specific structural and engineering applications.
Q: What materials are used for Seamless Hollow Sections?
A: Seamless Hollow Sections are typically manufactured from carbon steel, alloy steel, and other high-performance steel grades. Common grades include ASTM A106, ASTM A53, ASTM A500, EN S355, and other grades according to customer requirements.
Q: What is the difference between Seamless Hollow Section and Welded Hollow Section?
A: The main difference is the manufacturing process. Seamless Hollow Sections are produced without welding, resulting in better uniformity and higher resistance to pressure and stress. Welded Hollow Sections are manufactured by forming and welding steel plates or strips and are commonly used for general structural applications.
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