Hot Dip Galvanized Square & Rectangular Steel Tube 20×20mm–400×400mm for Construction, Solar Mounting
Dettagli del prodotto
| Nome del prodotto: | Tubi quadrati e rettangolari in acciaio zincato | Tipo di rivestimento: | Rivestimento in zinco |
|---|---|---|---|
| Materiale: | Q195, Q215, Q235, Q355, ASTM A500, ASTM A36 | Misurare: | 20×20 mm–400×400 mm |
| Utilizzo: | Edilizia, montaggio solare | Rivestimento in zinco: | 40 g/m² – 275 g/m² |
| Finitura superficiale: | Rivestimento di zinco grigio argento, liscio ed uniforme | Forma: | quadrato e rettangolare |
Descrizione del prodotto
Galvanized Square Tubes and Rectangular Tubes are hollow structural steel sections manufactured from high-quality carbon steel and protected with a zinc coating through hot-dip galvanizing or electro-galvanizing processes. The zinc layer provides excellent corrosion resistance, making these tubes ideal for outdoor and industrial applications.
Our galvanized steel tubing is available in a wide range of sizes, from 20*20 mm to 400*400 mm and beyond, with wall thicknesses ranging from 0.8 mm to 12 mm. These products are widely used in construction, steel structures, solar mounting systems, agricultural equipment, machinery manufacturing, transportation infrastructure, and industrial projects.
The durable galvanized coating significantly extends service life while reducing maintenance costs, making galvanized square and rectangular steel tubes a cost-effective solution for long-term structural applications.
Many engineers default to square or round hollow sections for structural projects without considering the specific load direction. In applications where bending occurs primarily along one axis – such as roof purlins, trailer frames, crane runways, or mezzanine floors – square tubes often provide unnecessary strength in the vertical direction while lacking depth in the bending plane. Round tubes, on the other hand, are inefficient for beam applications due to their lower section modulus. Additionally, ordinary non-galvanized rectangular tubes suffer from rapid corrosion in outdoor or humid environments, especially at weld joints and cut ends, leading to costly maintenance and potential structural failure.
Steel structures exposed to moisture, rain, chemicals, and changing weather conditions are vulnerable to rust and corrosion. Traditional black steel tubes may deteriorate quickly when used outdoors or in harsh environments, leading to:
- Reduced structural strength
- Increased maintenance costs
- Shortened service life
- Safety risks in construction projects
- Higher replacement expenses
Industries such as construction, solar energy, agriculture, and infrastructure require steel products with enhanced corrosion resistance and long-term durability.
Solution
Galvanized square and rectangular steel tubes solve these challenges by applying a protective zinc coating over the steel surface.
Benefits of Galvanized Coating:
- ✔ Excellent corrosion resistance
- ✔ Extended service life
- ✔ Lower maintenance requirements
- ✔ Enhanced weather resistance
- ✔ Better appearance and surface protection
- ✔ Cost-effective long-term investment
The zinc layer acts as a sacrificial barrier that protects the steel substrate even when minor scratches or surface damage occur.
| 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.
- 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
- 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
Galvanized square and rectangular tubes are extensively used across various industries:
- Building frameworks
- Structural supports
- Warehouses
- Residential projects
- Solar panel mounting structures
- PV support brackets
- Renewable energy projects
- Industrial workshops
- Factory buildings
- Steel platforms
- Equipment supports
- Highway guardrails
- Airport facilities
- Railway projects
- Municipal engineering
- Greenhouse structures
- Livestock equipment
- Irrigation systems
- Machinery frames
- Equipment racks
- Conveyor systems
- Packing (Bundles / Seaworthy Packaging)
- Tagging
- Weight Checking
- Trucking / Shipment
Selecting the right galvanized tube depends on project requirements.
- Outdoor installation is required
- Long-term corrosion resistance is important
- Coastal or humid environments are involved
- Heavy-duty structural applications are needed
- Indoor applications are planned
- A smoother surface finish is preferred
- Lower cost is a priority
- Moderate corrosion resistance is acceptable
- Required load-bearing capacity
- Environmental conditions
- Zinc coating thickness
- Tube dimensions
- Project service life
- Budget requirements
Q1: Are these galvanized square tubes suitable for outdoor use in coastal areas?
Yes. Hot-dip galvanized tubes provide excellent corrosion resistance even in salt-laden coastal environments. For maximum protection, we recommend a thicker zinc coating (≥70µm) and regular visual inspection.
Q2: Can I weld or cut the galvanized tube without damaging the coating?
Welding and cutting are possible, but they will remove the zinc coating in the heat-affected zone. After fabrication, we recommend applying cold galvanizing spray or zinc-rich paint to the welded or cut areas to restore corrosion protection.
Q3: What is the difference between hot-dip galvanized and electro-galvanized square tubes?
Hot-dip galvanizing applies a much thicker and more durable zinc coating (40-85µm) through a molten zinc bath, providing superior outdoor corrosion resistance. Electro-galvanizing applies a thin coating (5-15µm) and is intended for indoor or light-duty applications only. For structural and outdoor uses, always choose hot-dip galvanized.
Q4: Do you provide custom sizes or special material grades?
Yes. We accept OEM orders for non-standard sizes, wall thicknesses, lengths, and higher steel grades such as Q355B. Please contact our sales team with your drawing or requirements.
Q5: How long will the galvanized coating last?
In typical rural or urban environments, the coating life exceeds 20-30 years. In severe industrial or coastal environments, the expected life is 15-25 years, depending on the coating thickness and local conditions.
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Hot Dip Galvanized Square & Rectangular Steel Tube 20*20mm–400*400mm for Construction, Solar Mounting Product Description Galvanized Square Tubes and Rectangular Tubes are hollow structural steel sections manufactured from high-quality carbon steel and protected with a zinc coating through hot-dip ...
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