Galvanized Square Tubes

1. Raw Material Preparation: 

Inspection and cutting of high-quality carbon steel strips (Q195/Q235/SS400/ASTM A36) to required dimensions.

2. Forming: 

Cold-rolling steel strips into square cross-sections using precision forming equipment, ensuring uniform shape and dimensions.

3. Welding: 

Electric resistance welding (ERW) to create seamless, durable longitudinal seams for structural stability.

4. Galvanization: 

Hot-dip galvanizing (submerging in molten zinc) or electro-galvanizing to form a protective zinc layer, enhancing corrosion resistance.

5. Post-Treatment: 

Cleaning and inspection of the zinc coating to ensure uniformity and adherence to standards (40-275 g/m²).

6. Cutting & Finishing: 

Cutting to standard 6m lengths or custom sizes, with deburring for smooth edges.

7. Quality Inspection: 

Dimensional checks, coating thickness tests, and corrosion resistance verification.

8. Warehousing: 

Stocking in our factory’s 20,000-ton inventory for immediate delivery.

Superior Corrosion Resistance: 

Zinc coating prevents rust and deterioration, adapting to Middle East salt spray, African humidity, and Southeast Asia rainfall.

High Strength & Durability: 

Carbon steel base ensures reliable load-bearing capacity for structural applications like scaffolding and greenhouse frames.

Easy Fabrication: 

Can be welded, drilled, or cut on-site, fitting diverse project requirements across regions.

Weather Resistance: 

Performs well in extreme temperatures (55°C+ desert heat, tropical rains) and harsh environments.

Aesthetic Appeal: 

Uniform zinc coating delivers a smooth surface, suitable for decorative and visible applications.

Adequate Inventory & Fast Delivery: 

20,000-ton stock enables 5-7 day delivery for standard orders, meeting urgent project timelines.

Our Galvanized Square Tubes comply with global and regional standards for seamless project approval:

• International Standards: ASTM A500, ASTM A53, EN 10219, JIS G3463, ASTM A653, EN 10346, JIS G3302
• Quality Certifications: ISO 9001, SGS certified
• Regional Compliance: SASO (Middle East), SONCAP (Africa), SNI (Indonesia), TIS (Thailand)
• All orders include material test certificates (MTC), coating test reports, and compliance documents for customs clearance.

Packaging

• Tubes are bundled with high-strength steel straps to prevent deformation during transit.
• Wrapped in moisture-proof film to protect the zinc coating from humidity (Southeast Asia/Africa) and dust (Middle East).
• Plastic caps are fitted on ends to prevent rust and damage.
• Placed on ISPM 15-certified wooden pallets for international shipping compliance.
• Clear English labeling includes product name, specs, batch number, and handling instructions.

Shipping

• Lead Time: Standard orders (from 20,000-ton inventory): 5-7 working days; Customized orders (sizes/lengths): 10-15 working days.
• Logistics Partners: Maersk, CMA CGM (global), Aramex (Middle East), SICEPAT (Southeast Asia), GIGL (Africa).
• Delivery Coverage: Port-to-port, door-to-door for major cities, and inland transport to remote construction/agricultural sites.
• Inventory Advantage: 20,000-ton stock ensures no delays for urgent orders, critical for time-sensitive projects.

1.Cold bending section steel surface can not have bubbles,cracks,inclusions and transverse stratification,wrinkle,buckle and so on. Allow slight pit,convex,indentation,scratch and pressure into the iron oxide,but is not greater than 10% of nominal wall thickness.

2.Surface defects allowed use grinding method to clear up,but after cleaning the thickness should be no less than minimum allowable thickness.

3.If have special requirements on surface quality of cold bending section steel ,determined by supply and demand.

RFQ Question: Can your hot-dip galvanized tubes resist Dubai’s coastal salt spray? What’s the delivery time?

Answer: Yes, our hot-dip galvanized square tubes (zinc coating ≥120g/m²) resist salt spray and 55°C desert heat.

RFQ Question: Need tubes for Kenya’s greenhouse project—will they withstand tropical rains? Delivery in 7 days possible?

Answer: Absolutely. Our 30×30mm~50×50mm hot-dip galvanized tubes resist tropical humidity and rains. We have sufficient stock, so 7-day delivery to Kenya is guaranteed.

RFQ Question: What’s the zinc coating thickness for tubes used in Saudi Arabia’s outdoor scaffolding? Lead time?

Answer: Our scaffolding tubes have a hot-dip galvanized coating of 150-275g/m², ideal for Saudi’s desert conditions. Stocked in 20,000-ton inventory, delivery takes 5-6 working days.

RFQ Question: Can you provide 100×100mm tubes for Indonesia’s machinery frames? Are they easy to weld?

Answer: Yes, our 100×100mm (WT 4.0mm) hot-dip galvanized tubes are perfect for machinery frames—easy to weld and corrosion-resistant to Indonesia’s humidity.

RFQ Question: Need 6m custom-length tubes for Nigeria’s rural school handrails—delivery time and durability?

Answer: We supply 6m custom-length tubes (25×25mm, WT 2.0mm) for handrails. Hot-dip galvanized for rain resistance, they’re durable for rural outdoor use.