At Tianjin Xiangliyuan Steel, we specialize in providing high-quality galvanized square steel pipes for a wide range of global industrial and construction applications. Understanding the key aspects of this versatile product is crucial for making informed purchasing decisions. This guide covers the essential details, from materials and specifications to our service advantages.

1. Common Materials & Grades
Our galvanized square pipes are primarily manufactured from:

Carbon Steel: The most common base material, offering an excellent balance of strength, formability, and cost. Standard grades include Q195, Q235, Q355 (Chinese standards), equivalent to ASTM A36, A53, A500 and similar international grades.

Low-Alloy Steel: For applications requiring higher strength and better mechanical properties.

2. Classification & Manufacturing Process
Galvanized square pipes are classified based on their manufacturing method:

Hot-Dipped Galvanized (HDG) SHS (Square Hollow Sections): The pipe is fabricated first (welded or seamless) and then submerged in a molten zinc bath. This provides a thick, durable coating with superior corrosion resistance, ideal for outdoor structures.

Pre-Galvanized / Cold-Formed SHS: Steel coil is galvanized first, then cold-rolled and formed into the square pipe shape. This offers a smoother, more uniform surface finish, suitable for indoor applications or aesthetic considerations.

3. Standard Specifications, Sizes & Wall Thickness
We stock an extensive inventory to meet diverse project needs. Below are some of the most commonly requested international sizes (Outside Dimensions x Wall Thickness):

Small Sizes (For Furniture, Light Structures):

20mm x 20mm x 1.2mm, 1.5mm, 2.0mm

25mm x 25mm x 1.2mm, 1.5mm, 2.0mm

30mm x 30mm x 1.5mm, 2.0mm, 2.5mm

Medium Sizes (For General Construction, Fencing, Supports):

40mm x 40mm x 1.5mm, 2.0mm, 2.5mm, 3.0mm

50mm x 50mm x 2.0mm, 2.5mm, 3.0mm, 4.0mm

60mm x 60mm x 2.0mm, 2.5mm, 3.0mm, 4.0mm

75mm x 75mm x 2.5mm, 3.0mm, 4.0mm, 5.0mm

Large Sizes (For Heavy Structural Frames, Columns):

100mm x 100mm x 3.0mm, 4.0mm, 5.0mm, 6.0mm, 8.0mm

120mm x 120mm x 4.0mm, 5.0mm, 6.0mm, 8.0mm

150mm x 150mm x 4.0mm, 5.0mm, 6.0mm, 8.0mm, 10.0mm

Rectangular Hollow Sections (RHS) are also available. Lengths are typically 6 meters or 12 meters, with custom lengths available upon request.

4. Surface Finish & Zinc Coating Thickness

Surface: The standard finish is spangled (a crystalline pattern), which can vary from minimal spangle to a more pronounced pattern. A smooth, uniform finish is also available for pre-galvanized pipes.

Zinc Coating Mass/Thickness: This is a critical quality indicator.

Standard Coating: Typically complies with ASTM A53 / ASTM A123, with a minimum average coating mass of 610 g/m² (85 µm per side). This is the most common specification for robust protection.

Light Coating: Around 275-350 g/m² (40-50 µm), suitable for less corrosive environments.

Heavy Coating: Up to or exceeding 915 g/m² (120 µm) for highly corrosive conditions.

5. Key Applications
Galvanized square pipes are prized for their strength, corrosion resistance, and ease of fabrication. Common uses include:

Construction: Structural frames, roof trusses, purlins, gates, fences, handrails, and scaffolding.

Infrastructure: Highway guardrails, signposts, street lighting poles, and agricultural buildings (greenhouses, barns).

Industrial: Machinery frames, conveyor systems, protective barriers, and warehouse storage systems.

Furniture & Decoration: Outdoor furniture, display racks, and modern architectural features.

Why Choose Tianjin Xiangliyuan Steel?

Unmatched Inventory & Size Range: Our vast stock ensures we can supply the exact size and specification you need, from small tubing to large structural sections. The sizes listed above are just a sample of our comprehensive catalog.

Rapid Delivery Commitment: For standard, commonly purchased specifications, we guarantee a swift turnaround. We can arrange production and shipping within 5-7 days for orders of in-stock items, helping you meet tight project deadlines.

Quality Assurance: We adhere to strict international standards (ASTM, BS, DIN, JIS, GB) throughout our production process, ensuring consistent quality, dimensional accuracy, and reliable corrosion protection.

Expert Support & Global Logistics: Our experienced team provides professional technical and commercial support. We handle export documentation and logistics seamlessly, delivering to ports worldwide.

Contact Us for Your Project Needs

For competitive pricing, detailed quotations, or technical data sheets for galvanized square steel pipes, please reach out to our expert team. We are ready to support your global supply chain requirements.

Company: Tianjin Xiangliyuan Steel
Email: infosteel@xlygt.com

Let us be your reliable partner in steel.