Description
Factory-Direct Galvanized SHS/RHS — Every batch of Q195–Q345 galvanized square and rectangular steel tubes rolls off our own three production lines in Jinan, eliminating trader markups before the first container is stuffed.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | Galvanized Square / Rectangular Steel Tube |
| Product Type | Square / Rectangular Steel Tube (SHS/RHS) |
| Steel Grade | Q195, Q215, Q235, Q345, GR.A, GR.B, S235, S355 |
| Standard | ASTM A213, DIN EN 10217-1 |
| Section Shape | Square / Rectangular |
| Size Range | Customized outer diameter and side length |
| Wall Thickness | 0.8–30 mm |
| Length | 100 mm – 11,800 mm (customizable) |
| Technique | Welded (ERW) / Seamless |
| Surface Treatment | Pre-galvanized / Hot-dip galvanized / Bare / Oiled / Black original steel |
| Tolerance | ±1% |
| Processing Service | Welding, Punching, Cutting, Bending, Decoiling |
| Invoicing | By Theoretical Weight |
| Packing | Standard Seaworthy Packing |
| Application | Structure Pipe, Steel Fence, Steel Post, Steel Construction, Warehouse Construction, Building Construction |
| MOQ | 10 Tons |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Building Construction | Primary column systems, roof truss frames, mezzanine support grids |
| Warehouse & Industrial Sheds | Portal frame rafters, girt and purlin bracing, crane runway beams |
| Infrastructure & Fencing | Highway guardrail posts, perimeter security fencing, solar panel mounting structures |
| Steel Fabrication Shops | Welded base plates, machined connection brackets, modular container frames |
Where EN 10219 Steel Grade Equivalence Decides Your Customs Clearance
A mill cert that reads S355JRH in Jinan must satisfy the same chemistry envelope your European inspector checks in Lagos.
I watched a full container of galvanized SHS sit in Apapa port for fourteen days because the test report listed Q345B without a cross-reference table to EN 10219 equivalents. The监理 refused to sign off until a third-party lab confirmed manganese and carbon fell within the S355JR band. [NEED_CITE: steel grade equivalence between EN 10219 and GB/T 6728 standards] When you source a Galvanized Square Rectangular Steel Tube Supplier who understands both Chinese and European nomenclature, that two-page equivalence appendix travels with every shipment — and your container clears in hours, not weeks.
Matching Wall Thickness to Structural Load Paths
Galvanized square and rectangular steel tubes in the 0.8–3 mm range serve light-gauge purlins and fence posts where corrosion resistance matters more than raw load capacity. Once your design calls for Q345 or S355 grades at 6 mm and above, you are building primary moment frames for warehouses and multi-story structures. The ±1% tolerance we hold on wall thickness means the theoretical weight on your invoice matches what your structural engineer calculated — no surprise shortfalls on site when the crane operator picks up a bundle expecting twelve tons and gets eleven.
Engineering Compliance Across Continents
Projects in West Africa and Southeast Asia routinely mix EN 10219 hollow sections with ASTM A500 specifications on the same drawing set. [NEED_CITE: EN 10219 cold-formed welded structural hollow sections technical delivery conditions] Our Q235 and Q345 grades map directly to S235 and S355 under EN 10219, while GR.A and GR.B satisfy ASTM A500 Grade B requirements. Hot-dip galvanized finishes hit 60+ microns for tropical coastal environments where pre-galvanized zinc would peel within two seasons. Every heat number traces back to our in-house lab reports covering chemical composition and tensile testing, so your EU-notified body or SGS inspector has paperwork that matches the physical product.
Why ERW Welded and Seamless Both Matter
ERW welded tubes dominate structural framing because the longitudinal seam sits flush inside the corner radius, giving clean bolted connections and predictable load transfer. For projects requiring internal pressure resistance or critical load paths — think hydraulic support columns or suspended mezzanine hangers — seamless options in Q345 eliminate the weld zone entirely. Pre-galvanized ERW tubes cut material costs for indoor warehouse frames, while hot-dip galvanizing after forming seals the weld seam and corners against rust in outdoor fencing and solar mounting structures.
The Hidden Price of Wrong-Grade Procurement
Ordering Q235 when your structural drawings specify S355 means your columns deflect under design load — and the fix is not a paperwork exercise, it is cutting out installed members and welding in replacements. [NEED_CITE: structural steel grade selection and load-bearing capacity requirements] Galvanized coatings below 60 microns fail adhesion tests on humid job sites, forcing full re-galvanizing after erection. Missing CE marks or untraceable heat numbers trigger customs holds that cost more in demurrage than the original steel order. A Galvanized Square Rectangular Steel Tube Supplier who ships without mill test certificates is selling you a liability, not a product.
Procurement Confidence Built on Factory Reality
We run three production lines simultaneously in Jinan, turning out 20,000+ tons monthly across 2,800+ specifications — meaning your 40×40×2.0 galvanized SHS ships from ready stock while your 200×100×8.0 RHS runs on a custom schedule. No trading company markup sits between your purchase order and our mill price. Every bundle carries original mill test certificates showing chemical composition and mechanical properties per heat number, and we welcome SGS or BV third-party inspection before container sealing. Our export team optimizes container loading for mixed-size SHS and RHS to maximize weight per TEU, cutting your per-ton freight cost on combined orders.
Documentation & Compliance
- Mill test certificate documenting Q235/Q345 chemical composition and yield strength per DIN EN 10217-1 and EN 10219 equivalence tables
- CE certificate covering EN 10210/EN 10219 for hot-finished and cold-formed structural hollow sections exported to EU markets
- ISO 9001:2015 quality management certificate covering production, inspection, and dispatch processes
- SGS or BV third-party inspection report verifying galvanized coating thickness and dimensional tolerance before shipment
- Full material traceability from heat number through production batch to final bundle marking
- Export customs documents including packing list, bill of lading, and certificate of origin for destination-country clearance
Packaging, Loading & Delivery
- Hot-dip galvanized SHS/RHS bundled with rubber edge protectors and steel straps to prevent zinc coating abrasion during ocean transit
- Pre-galvanized tubes wrapped in waterproof paper with desiccant packets for humidity-sensitive destinations in West Africa and Southeast Asia
- Mixed-size container loading plans optimized for 20ft and 40ft HC, combining heavy-wall RHS with light-gauge SHS to maximize payload per TEU
- Custom cut-to-length service available within the 100–11,800 mm range, with bundle marking showing heat number, steel grade, and dimensional specs
- FOB Jinan/Qingdao, CIF destination port, or DDP door-to-door logistics with real-time container tracking for project-timed delivery
Start Your Procurement With Verified Specs
Send your drawing list or specification sheet — including steel grade, wall thickness, surface treatment preference, and destination port — and receive a factory-direct quotation within twelve hours. We will attach sample mill test certificates and confirm SGS/BV inspection availability before you commit to a deposit.
Request Factory-Direct Pricing With Mill Certificates
Submit your Galvanized Square Rectangular Steel Tube specifications via email at admin@sdxinjiyuan.com or WhatsApp at +86 188 5315 7756 to receive bulk pricing, lead time confirmation, and compliance documentation for your next project.
Frequently Asked Questions
Q: What is the difference between pre-galvanized and hot-dip galvanized finishes for structural tubes?
A: Pre-galvanized tubes are coated before forming, offering lower cost and uniform zinc thickness suitable for indoor applications. Hot-dip galvanized tubes receive zinc coating after welding and forming, providing thicker coverage at corners and weld seams — essential for outdoor fencing, coastal structures, and high-humidity environments.
Q: Can you supply non-standard dimensions and what is the minimum order quantity?
A: We produce customized sizes within the 0.8–30 mm wall thickness and 100–11,800 mm length range. Standard specifications ship from ready stock with a 10-ton MOQ; custom dimensions require production scheduling with typical lead times of 15–25 days depending on order volume.
Q: How do you verify galvanized coating thickness meets project specifications?
A: Every batch undergoes in-house coating thickness measurement using magnetic gauges. Hot-dip galvanized products target 60+ microns for structural applications. SGS or BV third-party inspection is available before shipment to independently verify coating weight and adhesion per project requirements.
Q: What documentation do you provide for customs clearance and project compliance?
A: Each shipment includes original mill test certificates with heat-number traceability, CE certification for EN 10210/EN 10219 compliance, ISO 9001 quality certificates, and full export documentation. Third-party inspection reports from SGS or BV are available upon request for destination-country approval.
Q: How do you optimize container loading for mixed square and rectangular tubes?
A: Our export team creates custom loading plans combining heavy-wall RHS with light-gauge SHS to maximize weight per container. Nested configurations and strategic bundling reduce void space, cutting per-ton freight costs for multi-specification project orders.
Get Your Galvanized SHS/RHS Quote Today
Email your project specifications to admin@sdxinjiyuan.com or message +86 188 5315 7756 on WhatsApp to receive factory-direct pricing, mill test certificate samples, and delivery confirmation within 12 hours.
