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Corrosion Resistant Hot-Dip Galvanized Square Rectangular Steel Tubes for Structural Applications

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Corrosion Resistant Hot-Dip Galvanized Square Rectangular Steel Tubes for Structural Applications

Brand Name : talat

Model Number : Galvanized steel pipes

Certification : manufacture certificate

Place of Origin : China

MOQ : 1ton

Price : negotiate

Payment Terms : L/C,T/T,Western Union

Supply Ability : 10000tons

Delivery Time : 7-15days

Packaging Details : Standard seaworthy export packing or as customer demands

Product name : GI Steel Square and Rectangular Tubes

Material : Q195, Q215, Q235, Q355, ASTM A500, ASTM A36

End finish : Plain End, Beveled End or as required

Size : 20×20mm–400×400mm

Manufacturing Method : Roll Formed & High Frequency Welded

Zinc coating : 40 g/m² – 275 g/m²

Additional Services : Cutting, Drilling, Punching, Welding

Shape : square & rectangular

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Pre-Galvanized & Hot-Dip Galvanized Square Rectangular Steel Tubes for Fencing
Product Description

Galvanized Square Tubes and Rectangular Steel Tubes are corrosion-resistant hollow steel sections manufactured with a protective zinc coating. Compared with ordinary carbon steel tubes, galvanized tubing offers a longer service life and better weather resistance.​
Available in various sizes and thicknesses, these steel tubes are widely used in building structures, fencing systems, solar mounting frames, agricultural facilities, and industrial fabrication projects.​

Cause

Steel tubing used outdoors is constantly exposed to rain, moisture, and air pollution. Without proper protection, rust can develop quickly, leading to:

  • Corrosion and surface damage
  • Reduced structural strength
  • Higher maintenance costs
  • Shorter service life

For long-term outdoor applications, corrosion protection is essential.

Solution

Galvanized steel tubes are coated with a zinc layer that protects the steel from oxidation and environmental damage.

Benefits
  • Excellent corrosion resistance​
  • Long-lasting durability​
  • Low maintenance requirements​
  • Suitable for indoor and outdoor use​
  • Cost-effective structural material​

The zinc coating acts as both a physical barrier and a sacrificial protective layer for the steel substrate

Product Specifications
Parameter Details
Material Q195, Q235B, Q355B (or equivalent)
Size range 20x20mm, 25x25mm, 30x30mm, 40x40mm, 50x50mm, 60x60mm, 80x80mm, 100x100mm, 150x150mm, 200x200mm
Wall thickness 1.0mm – 5.0mm (custom available)
Length 6m, 5.8m, or customized (max 12m)
Zinc coating thickness 45µm – 90µm (as per ASTM A123 / EN ISO 1461)
Standard ASTM A500, EN 10219, GB/T 6728
Surface treatment Hot dip galvanized, smooth and bright
Tolerance According to international standard

Note: Custom sizes, thicknesses, and higher zinc coating can be produced upon request.

Common Square Tube Sizes
  • 20*20 mm
  • 25*25 mm
  • 40*40 mm
  • 50*50 mm
  • 75*75 mm
  • 100*100 mm
  • 150*150 mm
  • 200*200 mm
  • 300*300 mm
  • 400*400 mm
Common Rectangular Tube Sizes
  • 20*40 mm
  • 30*50 mm
  • 40*80 mm
  • 50*100 mm
  • 80*120 mm
  • 100*150 mm
  • 200*100 mm
  • 250*150 mm
  • 400*200 mm
  • 1000*800 mm
Packaging & Delivery
  • Packing (Bundles / Seaworthy Packaging)
  • Tagging
  • Weight Checking
  • Trucking / Shipment
Corrosion Resistant Hot-Dip Galvanized Square Rectangular Steel Tubes for Structural Applications
Corrosion Resistant Hot-Dip Galvanized Square Rectangular Steel Tubes for Structural Applications
How To Choose

Selecting the appropriate galvanized hollow section depends on engineering requirements and environmental conditions.

For Light Structural Applications

Recommended:

  • 20*20 mm – 80*80 mm
  • Thickness 1.0–3.0 mm

Suitable for:

  • Furniture frames
  • Greenhouses
  • Lightweight structures
For Medium Structural Applications

Recommended:

  • 100*100 mm – 200*200 mm
  • Thickness 3.0–8.0 mm

Suitable for:

  • Workshops
  • Warehouses
  • Commercial buildings
For Heavy-Duty Engineering

Recommended:

  • 250*250 mm and above
  • Thickness 8.0–16 mm

Suitable for:

  • Industrial plants
  • Large steel structures
  • Infrastructure projects
Additional Selection Factors
  • Corrosion environment
  • Structural load requirements
  • Service life expectations
  • Fabrication methods
  • Budget considerations
FAQ
Q1: What is the difference between square tubes and rectangular tubes?

Square tubes have equal side lengths, while rectangular tubes have different width and height dimensions for specific structural requirements.

Q2: Can galvanized steel tubes be used outdoors?

Yes. Hot-dip galvanized tubes are specifically designed for outdoor applications and provide excellent corrosion protection.

Q3: Are custom sizes available?

Yes. Customized dimensions, lengths, thicknesses, and zinc coating weights can be supplied according to project requirements.

Q4: What industries use galvanized rectangular tubes?

Construction, solar energy, agriculture, transportation, infrastructure, and industrial manufacturing industries commonly use galvanized rectangular steel tubing.

Q5: How long does galvanized tubing last?

Depending on the environment and coating thickness, galvanized steel tubes can provide decades of reliable service with minimal maintenance.


Product Tags:

Corrosion Resistant Galvanized Steel Tubes

      

Hot-Dip Galvanized Square Rectangular Tubes

      

Structural Applications GI Steel Tubes

      
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