High-Performance Hollow Sections for Structural, Industrial and
Infrastructure Applications
Product Overview
Galvanized Square Tubes and Rectangular Steel Tubes are cold-formed
hollow structural sections designed for projects that demand
durability, precision, and corrosion resistance. Manufactured from
premium-grade carbon steel and finished with a protective zinc
coating, these products offer dependable performance in both
structural and non-structural applications.
Available in a wide selection of dimensions and wall thicknesses,
galvanized hollow sections combine lightweight construction with
high mechanical strength, making them a preferred solution for
architects, engineers, contractors, and equipment manufacturers.
Whether used in steel buildings, renewable energy systems,
transportation facilities, or agricultural projects, galvanized
tubing provides a balance of structural efficiency and long-term
value.
Product Features
Unlike ordinary steel tubing, galvanized hollow sections are
engineered to perform in environments where corrosion resistance is
essential.
Precision Manufacturing
Each tube is produced using roll-forming and high-frequency welding
technology to achieve accurate dimensions, straightness, and
consistent wall thickness.
Superior Surface Protection
The zinc coating forms a continuous protective layer that minimizes
oxidation and improves resistance to weathering.
Reliable Structural Performance
Square and rectangular profiles provide excellent rigidity while
maintaining a favorable strength-to-weight ratio, allowing
designers to reduce structural weight without sacrificing
performance.
Fabrication Friendly
The material is suitable for cutting, drilling, punching, bending,
and welding, making it easy to integrate into customized
fabrication projects.
Specifications
| Item | Specification |
|---|
| Product Name | Galvanized Square Tube / Galvanized Rectangular Tube |
| Steel Grade | Q195, Q235, Q355, ASTM A500 Grade B/C |
| Manufacturing Process | Cold Formed ERW Hollow Section |
| Shape | Square Hollow Section (SHS) |
| Outer Size | 20*20 mm – 500*500 mm |
| Wall Thickness | 0.8 mm – 16 mm |
| Length | 3m, 6m, 9m, 12m or Customized |
| Zinc Coating | 60–275 g/m² |
| Standard | ASTM A500, EN10219, JIS, GB |
| Processing Service | Cutting, Drilling, Punching, Welding |
| Packaging | Standard Export Seaworthy Package |
Benefits of Using Galvanized Hollow Sections
Extended Service Life
The zinc coating significantly slows the corrosion process,
allowing structures to remain in service for many years with
minimal maintenance.
Lower Maintenance Costs
Unlike painted steel, galvanized tubing requires less frequent
surface treatment, reducing maintenance expenses over the lifetime
of the project.
Improved Structural Efficiency
Hollow sections provide high bending resistance while reducing
overall structural weight, helping optimize material usage.
Sustainable Construction Material
Galvanized steel is fully recyclable and supports environmentally
responsible construction practices.
Typical Applications
Galvanized square and rectangular tubes are suitable for a wide
variety of engineering applications.
Building Construction
- Structural columns
- Steel frames
- Roof support systems
- Industrial workshops
Renewable Energy
- Solar panel mounting systems
- PV module support structures
- Energy storage platforms
Infrastructure
- Highway guardrails
- Airport facilities
- Municipal engineering
- Public utility projects
Industrial Manufacturing
- Equipment bases
- Machine frames
- Storage racks
- Conveyor support systems
Agricultural Engineering
- Greenhouses
- Livestock shelters
- Irrigation equipment
- Agricultural machinery
How It Works
The durability of galvanized tubing is achieved through two
complementary protection mechanisms.
Zinc Barrier Layer
The galvanized coating prevents direct contact between the steel
surface and corrosive elements such as water and oxygen.
Self-Sacrificing Protection
If scratches occur during installation or service, the surrounding
zinc continues protecting the exposed steel by corroding before the
steel substrate.
This electrochemical process greatly improves the service life of
galvanized hollow sections.
Selection Guide
When selecting galvanized square or rectangular tubing, consider
the following technical factors:
Structural Requirements
Determine the required section size and wall thickness according to
design loads.
Exposure Environment
For coastal or chemically aggressive environments, select hot-dip
galvanized tubing with higher zinc coating weights.
Fabrication Requirements
Confirm whether the project requires laser cutting, punching,
bending, welding, or other secondary processing.
Applicable Standards
Choose products manufactured according to ASTM A500, EN 10219, JIS
G3466, or customer-specified standards.
Quality Control
Every production batch undergoes strict quality inspections to
ensure consistent performance.
Inspection items include:
- Dimensional accuracy
- Wall thickness tolerance
- Zinc coating quality
- Surface appearance
- Weld integrity
- Mechanical properties
This quality management process ensures every tube meets
international engineering requirements.
FAQ
Q1: Why are hollow sections widely used instead of solid steel
bars?
Hollow sections provide comparable structural strength while
significantly reducing weight and material consumption.
Q2: Which galvanizing process is better for outdoor projects?
Hot-dip galvanizing is generally recommended because it provides a
thicker zinc layer and longer corrosion protection.
Q3: Can galvanized tubes be fabricated after delivery?
Yes. Cutting, drilling, punching, bending, and welding are all
supported according to fabrication requirements.
Q4: Which industries most frequently use galvanized square and
rectangular tubes?
Construction, renewable energy, logistics, transportation,
agriculture, industrial manufacturing, and municipal engineering.
Q5: Can different zinc coating weights be supplied?
Yes. Zinc coating thickness can be customized according to
environmental exposure and project specifications.
