Advantages of galvanized square tubes

Galvanized hollow sections are widely used in modern construction, serving applications in building projects, machinery manufacturing, road and bridge construction, shipbuilding, and more. As an economical and practical metal tubing option, they offer strong corrosion resistance, durability, easy processing, high strength, and a long service life.

Main Applications of Galvanized Hollow Sections

Galvanized square and rectangular tubes—commonly referred to as square hollow sections (SHS) and rectangular hollow sections (RHS)—can be classified in multiple ways:

By manufacturing process:
Hot-rolled seamless, cold-drawn seamless, extruded seamless, and welded hollow sections.

By material:
Plain carbon steel hollow sections and low-alloy steel hollow sections.

By production standard:
Chinese GB, JIS, BS, ASTM, EN standards, as well as custom non-standard products.

By cross-sectional shape:
Simple sections and complex sections.

By surface treatment:
Hot-dip galvanized, electro-galvanized, and other coated forms.

Such versatility makes galvanized hollow sections suitable for structural frames, support systems, mechanical components, guardrails, agricultural greenhouses, and various engineering applications.

Advantages of Galvanized Square Hollow Sections

1. Outstanding Corrosion Resistance
The galvanizing process forms a protective zinc layer that greatly enhances corrosion and rust resistance. The smooth, clean surface further improves durability and makes the material adaptable to diverse environments.

2. Strong Toughness and Pressure Resistance
Galvanized hollow sections can be buried underground without deforming or cracking, even under heavy vehicle or foot traffic. This demonstrates their excellent load-bearing capacity and durability.

3. High Strength and Structural Stability
Their high hardness and stability make them ideal for structural support. Many large buildings and engineering projects prefer galvanized hollow sections due to their resistance to bending, impact, and collapse.

These characteristics—summarized by Heyuan Building Materials—are exactly why galvanized square and rectangular tubes remain so widely favored across industries.

FAQ: Galvanized Hollow Sections

Q1: What is the difference between hot-dip and electro-galvanized hollow sections?

Hot-dip galvanized: Thicker zinc coating, better corrosion resistance, ideal for outdoor or harsh environments.

Electro-galvanized: Thinner coating, smoother surface, better for indoor use or lighter applications.

Q2: Can galvanized hollow sections be used underground?
Yes. They are strong and corrosion-resistant enough for underground installation, but additional protective measures may extend lifespan in highly corrosive soils.

Q3: What shapes and sizes are available?
Common outer dimensions range from 20×20 mm to 600×600 mm with wall thickness from 1 mm to 20 mm. Custom sizes can be produced based on project needs.

Q4: How long do galvanized hollow sections last?
With proper installation and maintenance, hot-dip galvanized hollow sections can last 30–50 years, depending on environmental conditions.

Q5: Are galvanized hollow sections weldable?
Yes. They can be welded, cut, and processed easily. Pre-welding cleaning and proper techniques are recommended to maintain coating integrity.