Galvanized square tubes are one of the most commonly used structural materials in modern greenhouses. They are widely applied in main frames, support columns, roof structures, and ventilation systems, providing excellent strength, stability, and corrosion resistance. With a smooth zinc coating, the tubes can effectively withstand humidity and harsh outdoor conditions, ensuring a long service life for greenhouse projects.

Our company has over 15 years of experience in manufacturing greenhouse structures and steel components. We own a 6,000-square-meter production and processing facility, equipped with advanced tube forming, galvanizing, and cutting machines. All square tubes are produced in-house, allowing us to maintain strict quality control and provide customized sizes and thicknesses according to project requirements.

Thanks to our professional production team and standardized quality management, we have successfully supplied galvanized square tubes to greenhouse builders, agricultural investors, and distributors in more than 40 countries. Whether for vegetable, fruit, or flower cultivation, our products offer reliable structural performance and cost-effective solutions for different climates and growing needs.

All galvanized square tubes for greenhouses are carefully packed to ensure safe delivery during long-distance transportation. Each bundle is securely tied with strong steel straps and wrapped in waterproof plastic film to protect against rust, scratches, and surface damage. For container loading, all bundles are reinforced with steel wires and wooden supports to keep them stable throughout transit.

We mainly ship from Tianjin Port, which provides efficient access to major international routes. Depending on customer needs, shipments can also be arranged from Qingdao, Shanghai, or Ningbo ports.

All necessary export documentation is provided, such as the Commercial Invoice, Packing List, Bill of Lading, Certificate of Origin, and any third-party inspection reports requested by the customer. We ensure that every shipment is traceable, well-protected, and delivered smoothly to our clients worldwide.

Q1: What are galvanized square tubes used for in greenhouses?
A1: Galvanized square tubes are mainly used for greenhouse structures such as columns, roof frames, and purlins. Their high strength and corrosion resistance ensure long-term stability in outdoor environments.

Q2: What are the advantages of using square tubes compared to round or oval tubes?
A2: Square tubes provide better structural stability, easier installation, and stronger connections. They are ideal for the main framework of greenhouses where high precision and durability are required.

Q3: Can you customize the size and thickness?
A3: Yes. We can produce according to your requirements, including size, wall thickness, zinc coating weight, and steel grade. OEM/ODM service is available for greenhouse projects of any scale.

Q4: How do you guarantee the quality of the galvanized square tubes?
A4: Our factory has over 15 years of experience in manufacturing greenhouse steel structures. We own a 6,000㎡ production and processing base, equipped with advanced forming and galvanizing lines. Each product is tested for dimensions, zinc coating thickness, and surface quality before shipment.

Q5: What types of galvanizing do you provide?
A5: We offer hot-dip galvanizing, pre-galvanizing, and cold galvanizing options. The choice depends on your project’s corrosion resistance requirements and budget.

Q6: Can you provide samples for quality testing?
A6: Yes. Free samples are available for inspection. The customer only needs to cover the shipping cost.