Description
Factory-Direct EN10219 Seamless Square Rectangular Hollow Section Supplier — S355J2H SHS/RHS manufactured to EN 10210/10219 with ±1% tolerance, exported to 50+ countries with full CE and ISO certification.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | S355JRH/J0H/J2H/K2H/NH Seamless Square and Rectangular Hollow Section |
| Product Type | Seamless Square and Rectangular Hollow Section |
| Steel Grade | S355JRH, S355J0H, S355J2H, S355K2H, S355NH, S460, S690, Weathering Steel |
| Standard | EN 10210, EN 10219, ASTM A500, ASTM A501, JIS G3444, JIS G3466 |
| Section Shape | Rectangular / Square |
| Technique | Seamless Manufacturing Process |
| Surface Treatment | Hot Rolled |
| Tolerance | ±1% |
| Special Pipe | Thick Wall Pipe |
| Oiled or Non-oiled | Non-oiled |
| Surface | Smooth |
| Processing Service | Welding, Punching, Cutting, Bending, Decoiling |
| Invoicing | By Theoretical Weight |
| Packing | Standard Seaworthy Packing |
| Application | Steel structures, Heavy-duty engineering, Glass curtain wall framing, Facade systems, Bridge and highway construction, Port and stadium construction, Prefabricated and modular buildings, Industrial framing and support |
| MOQ | 10 Tons |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Construction & Infrastructure | Building frames, bridge girders, highway gantry structures, stadium roof trusses |
| Architectural Facades | Glass curtain wall framing, exposed structural columns, decorative facade mullions |
| Heavy Engineering | Port crane booms, industrial equipment supports, heavy-load conveyor structures |
| Prefabricated Construction | Modular building columns, prefabricated warehouse frames, containerized facility structures |
Where EN 10219 Certification Decides Customs Clearance for Seamless Square Rectangular Hollow Section
Missing CE marks or incorrect EN standard references block EU imports — every shipment.
When sourcing EN10219 seamless square and rectangular hollow section for European projects, buyers frequently encounter customs rejection due to incomplete mill test certificates or mismatched standard designations. The EN 10219 cold-formed hollow section requirements specify strict dimensional tolerances, chemical composition limits, and mechanical property verification that must be documented per EN 10204 3.1. Without proper certification, even structurally sound tubes face delays at port, storage fees accumulate, and project timelines slip. Third-party inspection from SGS or BV becomes mandatory for regulated markets, yet many suppliers cannot provide verified documentation before shipment. [NEED_CITE: EN 10219 cold-formed hollow section requirements]
How Seamless Manufacturing Achieves ±1% Tolerance for Precision Structural Framing
The seamless manufacturing process eliminates the weld seam found in ERW or SSAW tubes, delivering uniform wall thickness and consistent mechanical properties throughout the cross-section. For S355J2H and higher grades like S460 or S690, this uniformity becomes critical when hollow sections serve as load-bearing columns or moment-resisting frame members. The ±1% dimensional tolerance ensures that connection plates fit without secondary machining, reducing on-site fabrication time. Thick-wall capability up to 40mm accommodates heavy-duty engineering applications where standard cold-formed sections would buckle under compressive loads. When specifying EN10219 seamless square and rectangular hollow section for facade systems, the smooth hot-rolled surface accepts paint or powder coating without visible weld line defects.
Structural Design Compliance and Corrosion Protection Selection
Engineering specifications for steel structures typically reference EN 1993 (Eurocode 3) or AISC 360 for load calculations, requiring hollow sections to meet specific grade and tolerance criteria. S355J2H provides higher yield strength than S275JR while maintaining weldability and formability, making it suitable for both building frames and bridge components. In corrosive environments such as port facilities or coastal infrastructure, weathering steel grades offer atmospheric corrosion resistance without protective coatings, though initial surface appearance differs from standard carbon steel. The EN10219 seamless square and rectangular hollow section conforms to multiple international standards including ASTM A500 for North American projects and JIS G3466 for Japanese specifications, simplifying global procurement. Third-party inspection reports verify compliance before shipment, ensuring smooth customs clearance in destination countries. [NEED_CITE: steel grade equivalence between EN and ASTM standards]
Steel Grade Selection and Manufacturing Process Fundamentals
The S355 series encompasses multiple impact toughness designations: JRH for room temperature testing, J0H for 0°C, J2H for -20°C, and K2H for -20°C with higher impact energy requirements. For projects in cold climates or dynamic load applications, selecting the appropriate sub-grade prevents brittle fracture failures. The seamless manufacturing process involves piercing a solid billet and elongating it through mandrel rolling, producing tubes with superior concentricity compared to welded alternatives. This method suits thick-wall sections where weld seam quality becomes difficult to verify non-destructively. Hot-rolled surface finish provides mill scale that offers temporary corrosion protection during storage and transport, though final projects typically require blast cleaning and coating. The patented sharp-corner rectangular tube technology fills a market gap where standard rounded-corner sections fail to meet architectural aesthetic requirements for glass curtain walls and exposed structural elements. [NEED_CITE: seamless vs welded steel tube manufacturing comparison]
Hidden Costs of Incorrect Material Specification and Certification Gaps
Ordering S355JRH when project specifications require S355J2H creates structural safety risks in low-temperature environments, as the material lacks verified impact toughness at sub-zero conditions. Similarly, accepting tubes with wall thickness exceeding negative tolerance limits reduces theoretical weight invoicing accuracy while compromising load-bearing capacity. Certification gaps — such as missing CE marks for EU construction products regulation compliance — result in customs detention, demurrage charges, and potential rejection by building inspectors. The EN10219 seamless square and rectangular hollow section must carry proper mill test certificates documenting chemical composition, mechanical properties, and dimensional verification per EN 10204 3.1 requirements. Without these documents, even physically compliant tubes become unsellable in regulated markets. [NEED_CITE: construction product regulation CE marking requirements]
Why Project Procurement Teams Choose Our Mill-Direct Supply
As the original inventor of sharp-corner rectangular steel tubes in China with 41 invention patents, we produce EN10219 seamless square and rectangular hollow section across 3 dedicated production lines covering 2,800+ specifications. Our in-house physical and chemical laboratory performs dimensional verification, tensile testing, impact testing, and spectrographic analysis before every shipment, providing mill test certificates that meet EN 10204 3.1 standards. Full international certifications including ISO 9001:2015, Lloyd’s CE marking for EN 10210/10219, and Singapore FPC ensure smooth customs clearance across 50+ export destinations. We accept SGS or BV third-party inspection prior to loading, giving buyers independent verification of material compliance. Custom non-standard sizes, extra-large dimensions, and heavy wall thickness up to 40mm are available with low minimum order quantities, eliminating the need to source from multiple suppliers. Professional container loading with anti-damage measures prevents bending and surface defects during ocean transit, reducing rejection rates at destination ports.
Documentation & Compliance
- Mill test certificate documenting S355J2H chemical composition and mechanical properties per EN 10210, including carbon equivalent value for weldability assessment
- CE certificate confirming EN 10210/10219 compliance for construction products regulation, enabling customs clearance in EU member states
- ISO 9001:2015 quality management system certificate covering seamless hollow section manufacturing and inspection processes
- SGS or BV third-party inspection report verifying dimensional tolerance, surface quality, and material traceability before shipment
- Heat number traceability linking each tube to original billet chemistry and rolling records for project quality audits
- Complete customs documentation including packing list, bill of lading, and certificate of origin for destination country import requirements
Packaging, Loading & Delivery
- Seamless S355J2H tubes bundled with steel strips and edge protectors to maintain ±1% dimensional tolerance during ocean transit
- Hot-rolled surface protected with anti-rust oil upon request, preventing mill scale deterioration in humid storage conditions
- Container loading optimized for thick-wall rectangular sections up to 40mm, maximizing payload while preventing nesting damage
- Custom cutting to project-specified lengths eliminates on-site waste and reduces secondary fabrication requirements
- Heat number and steel grade stenciled on each tube end for site identification and material traceability verification
- FOB, CIF, and DDP shipping terms available with professional loading supervision to prevent transit damage
How to Request Quotation and Technical Documentation for Your Project
Submit your project specifications including section dimensions, wall thickness, steel grade requirement, total quantity, and destination port to receive detailed quotation with unit pricing and production lead time. We provide mill test certificate samples and CE documentation for your engineering team review before order confirmation. For non-standard sizes or sharp-corner rectangular sections requiring patented technology, our technical team prepares custom manufacturing proposals within 48 hours. Third-party inspection arrangements through SGS or BV can be confirmed at order placement to ensure independent compliance verification.
Request EN10219 Seamless Square Rectangular Hollow Section Quotation
Send your specifications to receive pricing, mill test certificate samples, and production schedule within 12 hours.
Contact: Shandong Xin Jiyuan Special Steel Tube Co., Ltd
Website: www.sdxjypipe.com
Tel: +86 531 8573 6315
Mobile/WhatsApp/WeChat: +86 188 5315 7756
Email: admin@sdxjypipe.com
Address: No.11889, Jingshi West Road, Lulian Group, Jinan City, Shandong Province, China
