Description
Factory-Direct Galvanized SHS/RHS — Hot-dip galvanized square and rectangular tubes produced on our own ERW lines in Jinan, shipped without trading margins to EPC and construction buyers in 50+ countries.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | Galvanized Square and Rectangular Steel Tube |
| Product Type | SHS / RHS, Hot-Dip Galvanized |
| Steel Grade | Q195, Q235, S235, S275, ASTM A500 |
| Standard | ASTM A500, ASTM A53, EN 10219, EN 10210, JIS G3466, GB/T 6728, ISO 65 |
| Section Shape | Square / Rectangular |
| Size Range | Customized |
| Wall Thickness | Up to 40 mm |
| Length | 6 m / 12 m, or customized |
| Technique | ERW / Welded |
| Surface Treatment | Hot-Dip Galvanized |
| Tolerance | ±1% |
| Ends | Plain / Beveled / Threaded / Grooved |
| Application | Municipal water supply, fluid transport, steel structures, construction frames, machinery parts, scaffolding |
| MOQ | 1 Ton |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| EPC Contractors | Steel frames for water treatment plants, pipe rack supports, equipment platforms |
| Construction Companies | Scaffolding uprights, building columns, roof trusses, facade bracing |
| Machinery Manufacturers | Conveyor frames, hoist booms, equipment bases, guarding structures |
| Infrastructure Developers | Highway sign gantries, sound barrier posts, solar mounting structures |
Where Zinc Coating Thickness Decides Site Acceptance
A 25-micron gap between spec and actual galvanizing is the single most common reason galvanized square and rectangular steel tube shipments fail third-party inspection at destination ports.
Buyers ordering hot-dip galvanized SHS/RHS for municipal water or outdoor structural work routinely specify 65 μm minimum zinc coating. Mills under pressure on cost often deliver 35–45 μm, passing visual inspection at origin but failing SGS or BV testing on arrival. The result is not just a rejected batch — it is air-freighted replacement tonnage, delayed project handover, and a strained relationship with the project owner. [NEED_CITE: hot-dip galvanizing coating thickness requirements per ISO 1461]
Matching Galvanized SHS/RHS to Structural and Corrosion Demands
Hot-dip galvanizing deposits a metallurgically bonded zinc-iron alloy layer that outperforms pre-galvanized or painted finishes in continuous wet or saline environments. For municipal water supply frames and coastal scaffolding, this means design life extension without recurring maintenance. Our Galvanized Square and Rectangular Steel Tube range covers Q195 through ASTM A500 grades, allowing specifiers to match yield requirements to load calculations while keeping corrosion protection consistent across the entire procurement package — pipes, beams, and fabricated nodes from a single source.
Engineering Compliance and Certification Pathways
Structural frames designed to EN 1993 or AISC require hollow sections that conform to recognized forming and welding standards. Galvanized SHS/RHS produced to EN 10219 (cold-formed) or EN 10210 (hot-formed) carry CE marking that satisfies EU notified-body requirements, while ASTM A500 Grade B/C documentation clears North American customs without re-testing. [NEED_CITE: EN 10219 cold-formed structural hollow sections technical delivery conditions] Wall thickness tolerance of ±1% keeps theoretical weight calculations aligned with actual delivered tonnage, preventing budget overruns on large-volume EPC orders. Third-party inspection by SGS or BV is accepted at the mill before loading, giving project owners an independent verification point.
Steel Grade Selection and Galvanizing Process Fundamentals
Q195 and Q235 remain the default grades for light structural and scaffolding applications where formability matters more than ultimate load capacity. S235 and S275 step up yield strength for primary building frames and equipment supports, while ASTM A500 Grade B/C is specified on North American projects for its documented tensile and elongation minima. Hot-dip galvanizing immerses the welded ERW tube in molten zinc at approximately 450 °C, producing a coating of 45–85 μm depending on immersion time and steel silicon content — higher silicon steels react faster and can produce thicker but more brittle coatings. [NEED_CITE: influence of steel silicon content on hot-dip galvanizing coating structure] Wall thickness up to 40 mm covers heavy-duty column and beam applications that would otherwise require fabricated built-up sections. Our proprietary sharp-corner rectangular tube technology produces corner radii tight enough for flush gusset connections while maintaining full zinc coverage at the radius — a detail that eliminates corrosion initiation points at welded joints.
Hidden Costs of Under-Specified Galvanized Procurement
Ordering galvanized square and rectangular steel tube on price alone, without locking zinc coating minimums and mill test certificate requirements in the purchase order, shifts risk entirely to the buyer. Material that fails to meet EN 10210 or ASTM A500 chemistry gets held at customs, delaying project start by weeks. Negative tolerance beyond the declared ±1% reduces actual load capacity below the engineer’s calculation, triggering re-design or reinforcement costs that dwarf the original purchase saving. [NEED_CITE: consequences of negative tolerance deviation in structural hollow sections]
Why Global Buyers Source Galvanized SHS/RHS from Xin Jiyuan
Production runs on three dedicated ERW lines with in-house physical and chemical laboratories, meaning every heat is tested before galvanizing and every batch after. The mill holds CE EN 10210/EN 10219, ISO 9001, Singapore FPC, and SGS/BV verification — documentation packages that clear EU, North American, and Middle Eastern customs without supplementary testing. Over 2,800 specifications in stock and custom non-standard sizes eliminate the need to split orders across multiple suppliers. Forty-one invention patents, including the sharp-corner rectangular tube process, address connection and aesthetic gaps that standard catalog sections cannot fill. Factory-direct pricing removes trading margins, and professional container loading plans optimize 20ft and 40ft shipments for 6 m and 12 m lengths.
Documentation & Compliance
- Mill Test Certificate documenting Q235 / S275 / ASTM A500 chemical composition and mechanical properties per heat number
- CE certificate covering EN 10210 and EN 10219 for EU market structural compliance
- ISO 9001:2015 quality management certificate for production and inspection traceability
- SGS or BV third-party inspection report confirming zinc coating thickness and dimensional tolerance
- Material traceability report linking each bundle to heat number, galvanizing bath record, and final inspection sign-off
- Customs document package including packing list, bill of lading, and certificate of origin
Packaging, Loading & Delivery
- Galvanized SHS/RHS bundled with high-tensile steel strips and edge protectors to preserve the zinc coating during ocean transit
- End caps fitted on every tube to prevent moisture ingress and white rust formation on the galvanized surface
- Container loading plans optimized for 6 m and 12 m lengths across 20ft and 40ft equipment, maximizing tonnage per shipment
- Heat number and steel grade stenciled on each bundle for site identification and traceability verification
- FOB, CIF, and DDP terms available with door-to-door logistics coordination to 50+ countries
- Custom cutting to project-specific lengths available before galvanizing to maintain full zinc coverage on cut ends
Starting Your Galvanized SHS/RHS Procurement
Submit your specification sheet — section size, wall thickness, steel grade, total tonnage, and destination port — and receive a detailed quotation within 12 hours including unit price, production lead time, payment terms, and applicable certification scope. Non-standard sizes and sharp-corner rectangular tube requirements are quoted separately with mill drawings for engineering approval before deposit.
Request Your Galvanized Square and Rectangular Steel Tube Quotation
Send your specification and destination details to receive pricing, mill test certificate scope, and loading plan within one working day.
WhatsApp / WeChat: +86 188 5315 7756
Email: admin@sdxjysteel.com
Tel: +86 531 8573 6315
