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Help CenterHot-Dip Galvanized Welded Square Steel Pipe 40x40mm to 150x150mm
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As a trusted manufacturer since 2015, Hunan Yige Special Steel Science Technology Co., Ltd. delivers premium hot-dip galvanized welded square steel pipes engineered for demanding industrial applications. Operating from our expansive 5,000-10,000 square meter facility in Changsha, China, we leverage stringent ISO9004 and ISO14000 certified processes to ensure consistent quality and environmental responsibility. Our pipes offer exceptional durability and cost-efficiency, making them the preferred choice for structural projects worldwide.
Serving diverse markets across North America, South America, Europe, Asia, Africa, and Oceania, we understand the critical need for reliable corrosion protection and structural integrity. Our 40x40mm to 150x150mm square pipes are meticulously crafted to exceed industry expectations, providing a robust solution for architects, engineers, and contractors seeking long-lasting performance.
Core Product Advantages & Technical Specifications:
- Superior Corrosion Protection: The hot-dip galvanizing process creates a metallurgical bond between the zinc coating and the steel substrate, forming a barrier significantly more resilient than electroplated coatings. This ensures decades of service life even in harsh environments (coastal, industrial).
- Precision Welding & Strength: Utilizing advanced ERW (Electric Resistance Welding) technology, we achieve seamless, high-strength welds. The square shape provides excellent torsional rigidity and load-bearing capacity compared to round pipes in many structural applications.
- Dimensional Versatility: Available in a comprehensive range from 40x40mm up to 150x150mm, with wall thicknesses typically ranging from 1.0mm to 6.0mm. Custom sizes and thicknesses are available upon request to meet specific project blueprints.
- Material Consistency: Manufactured from high-quality carbon steel grades (Q195, Q235, SS400), ensuring uniform mechanical properties and weldability throughout every batch.
- Surface Quality: Smooth, spangle-free finish after galvanizing, suitable for direct use or further painting/powder coating if required for aesthetic purposes.
Standard Size & Weight Reference Table:
| Outer Dimension (mm) | Common Wall Thickness (mm) | Approx. Weight per Meter (kg/m)* |
|---|---|---|
| 40x40 | 1.5, 2.0, 2.5, 3.0 | 1.85 - 3.45 |
| 50x50 | 1.5, 2.0, 2.5, 3.0 | 2.32 - 4.39 |
| 80x80 | 2.0, 2.5, 3.0, 4.0 | 4.96 - 9.33 |
| 100x100 | 2.5, 3.0, 4.0, 5.0 | 7.66 - 14.10 |
| 120x120 | 3.0, 4.0, 5.0, 6.0 | 11.25 - 21.59 |
| 150x150 | 4.0, 5.0, 6.0 | 18.47 - 26.79 |
*Weight based on steel density 7850 kg/m³. Actual weight may vary slightly. Other thicknesses available.
Key Benefits for Your Business:
- Reduced Lifetime Costs: The exceptional corrosion resistance drastically lowers maintenance and replacement expenses over the structure's lifespan.
- Enhanced Structural Integrity: High strength-to-weight ratio and consistent dimensions ensure reliable performance in load-bearing frameworks, supports, and safety barriers.
- Ease of Fabrication & Installation: Straightforward cutting, welding, and bolting compatibility streamline construction processes and reduce labor time.
- Wide Application Suitability: Ideal for building frames, warehouse racks, agricultural structures, fencing systems, machinery guards, greenhouse frameworks, and signage supports.
Trust & Global Reach:
Backed by ISO9004 (Quality Management) and ISO14000 (Environmental Management) certifications, Hunan Yige Special Steel implements rigorous quality control at every stage – from raw material sourcing to final inspection. Our established presence across North America, South America, Eastern & Western Europe, Southeast Asia, Africa, Oceania, the Middle East, and domestic China demonstrates our capability to meet international standards and logistics demands reliably. We consistently deliver products that meet or exceed specifications like ASTM A53.
Invest in the longevity and reliability of your structures. Partner with a manufacturer committed to quality and global service. Contact Hunan Yige Special Steel today for competitive quotations, detailed technical data sheets, or to discuss your specific project requirements for hot-dip galvanized square steel pipes. Let our expertise become the foundation of your success.
Frequently Asked Questions (FAQ):
Q1: What is the minimum order quantity (MOQ) for these pipes?
A1: Our standard MOQ is typically 1 metric ton. However, we are flexible and willing to discuss requirements for initial sample orders or smaller trial shipments.
Q2: Can I get custom lengths or specific end treatments?
A2: Yes. We offer customization for length (standard is 6m or 12m, but others possible) and can provide plain ends, beveled ends, or threaded ends upon request. Please specify your needs in the inquiry.
Q3: How thick is the zinc coating?
A3: The coating thickness adheres to common standards like ASTM A123, typically ranging from 65µm to 85µm (minimum average), ensuring robust protection. Specific coating weight reports can be provided.
Q4: What packaging is used for export?
A4: Pipes are securely bundled using steel straps on wooden skids or pallets, suitable for ocean freight and container loading. Waterproof wrapping is available upon request.
Q5: Do you provide material test certificates?
A5: Yes. We can provide Mill Test Certificates (MTCs) or third-party inspection reports (e.g., SGS, BV) detailing chemical composition and mechanical properties for each batch, available upon request.
Q6: What is the lead time for production?
A6: Standard size orders usually ship within 15-25 days after order confirmation. Lead times for large volumes or custom specifications may vary and will be confirmed during order processing.
Q7: How do you ensure quality during galvanizing?
A7: Our process includes thorough surface cleaning (degreasing, pickling, fluxing) before immersion in molten zinc. Post-galvanizing, pipes undergo visual inspection and thickness testing to guarantee coating uniformity and adhesion.
Q8: Are your products suitable for outdoor use in corrosive environments?
A8: Absolutely. Hot-dip galvanizing provides superior protection against rust and corrosion, making these pipes highly recommended for outdoor structures, coastal areas, and industrial settings where exposure to moisture or chemicals occurs.
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