Description
Factory-Direct Galvanized SHS/RHS — Every batch shipped with EN 10219 mill test certificates and CE compliance for European customs clearance.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | Galvanized Square and Rectangular Steel Tube |
| Product Type | Hollow Section (SHS & RHS) |
| Steel Grade | Q235, Q345, S235JR, S275JR, STK400, STK500, SGCC, CGCC, DX51D |
| Standard | GB/T 3091, BS1387, EN39, EN1139, ASTM A53, JIS G3444, EN 10204/3.1B |
| Section Shape | Square / Rectangular |
| Size Range | 21.3–3048 mm |
| Wall Thickness | 0.8–50 mm |
| Length | Random / Fixed / SRL / DRL / Customized |
| Technique | Hot Rolled Based / ERW |
| Surface Treatment | Pre-painted (60–120 g/m²), Hot-dipped (120–500 g/m²), Electroplated (10–50 g/m²) |
| Tolerance | ±5% |
| Ends | Plain / Beveled / Threaded |
| Application | Steel structures, scaffolding, low-pressure fluid conveyance |
| MOQ | 5 Tons |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Construction & Infrastructure | Building frames, portal frames, adjustable steel props, scaffolding systems |
| Industrial Structures | Warehouse roof trusses, equipment support frames, conveyor structures |
| Fluid Conveyance | Water distribution networks, low-pressure gas lines, oil transfer piping |
| Agricultural & Solar | Greenhouse frames, solar panel mounting structures |
Where EN 10219 Certification Decides Customs Clearance for Your Galvanized Square and Rectangular Steel Tube
Missing CE or mill certificates can halt an entire container at EU ports.
European importers repeatedly face delays because their hollow section steel arrives without EN 10219 compliance documentation or traceable heat numbers. A galvanized square and rectangular steel tube that meets the correct zinc coating weight but lacks proper certification still gets rejected at customs — not because the product fails, but because the paperwork does. Buyers sourcing from fragmented suppliers often discover too late that their mill test certificates do not match the EN 10210/EN 10219 framework required for structural use in Europe. [NEED_CITE: EN 10219 cold-formed hollow section certification requirements for EU customs]
Matching Zinc Coating Weight to Corrosion Environments
A galvanized square and rectangular steel tube performs differently depending on whether it carries 30 g/m² or 500 g/m² of zinc. Electroplated tubes at 10–50 g/m² serve indoor applications where moisture exposure is minimal — furniture frames, indoor shelving, decorative structures. Pre-painted options at 60–120 g/m² bridge moderate outdoor use: signage supports, light structural frames in semi-sheltered areas. Hot-dipped galvanized tubes at 120–500 g/m² handle heavy-duty outdoor exposure: building frames, bridge railings, coastal infrastructure where salt spray accelerates corrosion. Selecting the wrong coating tier means premature rust or unnecessary cost overruns.
Structural Compliance and Engineering Standards
Galvanized SHS/RHS in S235JR and S355 grades conform to EN 10219 for cold-formed welded structural hollow sections, making them suitable for load-bearing frames designed under EN 1993 (Eurocode 3). Q235 and Q345 equivalents serve projects following Chinese GB standards or regions where these grades are specified. The ±5% wall thickness tolerance ensures that theoretical weight calculations remain reliable for structural engineering — critical when designing portal frames or scaffolding systems where load capacity depends on precise section properties. [NEED_CITE: structural hollow section compliance with EN 1993 and load-bearing requirements]
Steel Grade Selection and Weldability
S235JR offers good weldability and formability for general structural work, while S275JR and S355JR provide progressively higher yield strength for heavier load applications. Q235 remains the workhorse grade in Asian and African markets where cost sensitivity outweighs marginal strength gains. The ERW manufacturing process produces a consistent longitudinal weld seam that meets EN 10219 requirements for structural integrity. Hot-rolled base material ensures uniform mechanical properties across the cross-section, while the galvanized coating adds corrosion protection without compromising weldability — provided zinc is properly removed at weld zones during fabrication.
The Hidden Cost of Wrong Tolerance and Fake Certificates
Purchasing galvanized square and rectangular steel tube at rock-bottom prices often means accepting negative tolerance beyond the ±5% standard. A 3 mm wall thickness that measures 2.5 mm in reality reduces load-bearing capacity significantly — a risk that only surfaces during structural inspection or after failure. Similarly, fabricated mill test certificates that list S355JR chemistry but ship Q235 material create compliance failures during project handover. European buyers face customs seizure, while Middle Eastern and African project owners reject entire shipments when independent lab testing reveals grade mismatches. [NEED_CITE: consequences of steel grade misrepresentation in structural projects]
Why Global Buyers Source This Galvanized Square and Rectangular Steel Tube from Xin Jiyuan
Our factory operates three production lines running simultaneously, producing 20,000+ tons monthly across 2,800+ specifications — meaning your hot-dip galvanized SHS in 200×200×6 mm ships from ready stock while your custom 150×100×4 mm RHS in S355JR enters production within typical lead times. Every order includes original mill test certificates with full chemical and mechanical traceability by heat number, backed by ISO 9001:2015 and Lloyd’s CE certification under EN 10210/EN 10219. We consolidate multi-product container loads — pipes, plates, beams, and fabrication — into single shipments, eliminating the coordination overhead of managing five different suppliers. Third-party SGS or BV inspection is available before loading, and our export team handles all documentation and container loading optimization to prevent transit damage.
Documentation & Compliance
- Mill Test Certificate documenting S235JR/S355JR chemical composition and yield strength per EN 10219 with heat number traceability
- CE Certificate confirming compliance with EN 10210 (hot-formed) and EN 10219 (cold-formed) structural hollow sections for European market access
- ISO 9001:2015 Quality Management System certificate covering production and inspection processes
- SGS or BV Third-Party Inspection Report verifying dimensions, zinc coating weight, and surface quality before shipment
- Material Traceability Report linking each bundle to specific heat numbers and production batch records
- Customs Documentation Package including packing list, bill of lading, and certificate of origin formatted for destination port requirements
Packaging, Loading & Delivery
- Hot-dipped galvanized tubes bundled with steel strips and edge protectors to preserve the zinc coating during ocean transit and prevent edge damage
- Electroplated and pre-painted tubes wrapped in waterproof paper with plastic caps on tube ends to prevent moisture ingress and surface scratching
- Container loading optimized by our team based on tube length and section dimensions — 20ft containers for 6m fixed lengths, 40ft HC for 12m DRL shipments, with weight distribution calculated to prevent shifting
- Custom cut-to-length service available for DRL orders, with cut ends deburred and re-galvanized if required to maintain corrosion protection
- Heat number and steel grade stenciled on each bundle with weather-resistant paint for site identification and traceability verification
- FOB, CIF, and DDP terms available with professional logistics coordination from Jinan factory to destination port or project site
Request Your Galvanized Square and Rectangular Steel Tube Quotation
Submit your specifications — section dimensions, wall thickness, steel grade, surface treatment, quantity, and destination port — via email or WhatsApp to receive a competitive bulk quotation with volume pricing, mill test certificate confirmation, and typical production lead times. Our team responds within 12 hours with a complete Proforma Invoice and documentation checklist tailored to your destination country’s customs requirements.
Frequently Asked Questions
Q: What is the difference between hot-dip galvanized and pre-galvanized square tubes?
A: Hot-dip galvanizing coats the finished tube in molten zinc at 120–500 g/m², providing heavy-duty corrosion protection for outdoor and structural applications. Pre-galvanized tubes are made from pre-coated steel coil at 60–120 g/m², offering moderate protection at lower cost for indoor or semi-sheltered use. The weld seam on hot-dip tubes receives full zinc coverage, while pre-galvanized tubes may have reduced zinc at the weld zone.
Q: Can you provide EN 10219 certification for European customs clearance?
A: Yes. Our galvanized SHS and RHS carry Lloyd’s CE certification under EN 10210 and EN 10219, with every shipment including original mill test certificates documenting chemical composition and mechanical properties per EN 10204/3.1B. These documents satisfy European customs requirements and structural project compliance standards.
Q: What is the minimum order quantity for custom sizes?
A: Our flexible MOQ policy supports trial orders from 1 ton for standard specifications and 5 tons for custom non-standard sizes or special steel grades. Full-container bulk orders receive volume-based pricing discounts for long-term procurement partners.
Q: How do you ensure zinc coating quality before shipment?
A: Every batch undergoes in-house three-stage inspection covering coating thickness measurement, adhesion testing, and surface quality verification. Third-party SGS or BV inspection is available on request to provide independent certification of zinc coating weight and compliance with your specified standard.
Q: Can you consolidate multiple steel products in one container?
A: Yes. We specialize in consolidated multi-product container loading — combining galvanized SHS/RHS, round pipes, steel plates, H-beams, and fabrication into single shipments. This reduces your logistics coordination overhead and shipping costs compared to sourcing from multiple suppliers.
Get Your Galvanized Square and Rectangular Steel Tube Quote Today
Send your specifications to admin@sdxinjiyuan.com or contact us via WhatsApp at +86 188 5315 7756 to receive a competitive quotation with mill test certificate confirmation and documentation checklist within 12 hours.
