Tianjin Brisk Steel is one of the manufacturers of ERW Hot Finish CHS Pipe 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.
PRODUCT
Tianjin Brisk Steel focus on produce and supply hollow section and steel pipe
What is an ERW Hot Finish CHS Pipe?
Understanding how these pipes are engineered helps highlight their premium value:
- ERW (Electric Resistance Welding): The pipe begins as a high-quality steel strip rolled longitudinally and welded using high-frequency electrical resistance. This ensures a clean, high-strength weld seam.
- Hot Finish: After welding, the entire pipe is reheated to an austenitic temperature (typically above 850℃ to 900℃ and allowed to cool naturally. This thermal process eliminates all residual manufacturing stresses, refines the steel's grain structure, and ensures completely uniform strength throughout the body and the weld seam.
- CHS (Circular Hollow Section): The geometric round profile offers omnidirectional structural strength-equal resistance to bending and buckling forces from any direction.
Key Features & Engineering Benefits
1. Zero Residual Stress & Maximum Ductility
Because the pipes undergo full thermal processing, they are completely stress-free. Fabricators can cut, bend, notch, and weld these pipes on-site without worrying about geometric distortion, spring-back, or delayed cracking.
2. High Yield Strength under Dynamic Loads
Compliant with premium international standards like EN 10210, our hot-finished pipes offer excellent load-bearing capabilities. They exhibit higher structural predictability and superior fatigue resistance under dynamic or cyclic loading environments (e.g., wind, seismic movement, or heavy traffic).
3. Strict Dimensional Precision & Smooth Finish
By combining the tight tolerances of the ERW process with final hot sizing, these pipes maintain excellent outer diameter (OD) and wall thickness uniformity. The exterior surface is smooth and free from the micro-cracks often found in cold-formed alternatives.
4. Superior Atmospheric Corrosion Resistance
The grain refinement achieved through hot finishing ensures that protective zinc coatings react uniformly during hot-dip galvanizing, creating a robust, long-lasting barrier against harsh environmental elements.
Technical Specifications & Product Range
| Parameter | Specifications & Standards |
| Manufacturing Standards | EN 10210-1/2, ASTM A501, ASTM A53 (Type E) |
| Common Steel Grades | S275J0H, S355J2H, S355NH, Grade A/B (A501) |
| Outer Diameter (OD) | 21.3mm to 610mm (1/2" to 24") |
| Wall Thickness (WT) | 2.0mm to 25.0mm |
| Length Profiles | 5.8m, 6m, 11.8m, 12m, or precise cut-to-length options |
| Surface Protections | Bare/Oiled, Anti-Rust Primer, Hot-Dip Galvanized (HDG) |
Core Global Applications
Our ERW hot-finished structural round pipes are highly trusted across critical infrastructure sectors:
- Architectural Structural Frameworks: Lattice trusses, columns, space frames, and roof supports for airports, sports stadiums, and commercial high-rises.
- Bridge & Civil Infrastructure: Main structural piers, pedestrian bridge walkways, and highway overhead sign gantries.
- Offshore & Marine Engineering: Structural jackets for wind turbines, offshore platform bracing, and port handling structures.
- Piling & Foundations: High-load foundation casing and structural columns exposed to heavy geological stresses.
Frequently Asked Questions (FAQs)
FAQ
Q: What is the primary difference between a Hot-Finished (EN 10210) and a Cold-Formed (EN 10219) ERW pipe?
A: The main difference is internal residual stress. Cold-formed pipes are shaped at room temperature, keeping high stress trapped within the steel. When you cut or weld cold-formed pipes, they can warp or crack. Hot-finished pipes (EN 10210) are reheated completely, which removes these stresses. This ensures uniform strength, higher structural predictability, and prevents dynamic failure under heavy weights or seismic activity.
Q: Can these pipes be used for pressure applications as well as structural ones?
A: Yes. While primarily specified for structural and load-bearing applications, our ERW hot-finish tubes can be dual-certified to meet pressure piping standards (such as ASTM A53 Type E Grade B) upon request. This makes them suitable for low-pressure fluid, gas, or steam conveyance alongside their structural duties.
Q: How do you protect the pipes from rusting during long sea voyages?
A: For standard export shipments, we apply an environmentally safe anti-rust varnish or light protective oil to the exterior surfaces. To provide maximum security against sea-salt humidity, the pipes are bundled with heavy-duty steel bands and can be wrapped in thick, waterproof PVC woven sheets with protective plastic end caps.
Q: Do you support custom beveling and third-party inspections?
A: Absolutely. We provide precise factory beveling to prepare your pipe ends for immediate on-site structural welding. We also fully welcome international third-party inspection (TPI) agencies like SGS, Bureau Veritas (BV), or TÜV to verify product dimensions, mechanical properties, and packaging before shipment.
Contact Us
If you are interested in our ASTM A572 Circular Hollow Section, please contact us with your specific requirements (specifications, quantity, material, surface treatment, etc.), and we will provide you with a detailed quotation and product sample as soon as possible. We look forward to establishing long-term cooperative relationships with you!!
Hot Tags: erw hot finish chs pipe, China erw hot finish chs pipe manufacturers, suppliers, factory, customized erw pipe, erw pipe cost effective, erw pipe cutting process, erw pipe environmental impact, erw pipe procurement, erw pipe transportation
