Galvanized Steel Perforated Square Tube

Galvanized perforated square tubes are square tubes with evenly spaced holes on their surface. The base material is carbon steel, and they have excellent anti-corrosion qualities after the hot-dip galvanizing process. Its perforated design allows for flexible organization and secure fastening without welding, making it highly adjustable. Different sizes can even telescope (nest) into each other. This design not only aids in ventilation and drainage but also makes it suitable for a variety of applications, including shelving, traffic signposts, and agricultural equipment frames.

Product Specifications

Specification/Property	Description
Material	Carbon steel base with a hot-dip galvanized coating.
Cross-Section Dimensions	Common outside dimensions include 1.5×1.5 inches, 2×2 inches, 2.5×2.5 inches, etc. Some are designed for telescoping (nesting) with matching sizes.
Wall Thickness	Typically ranging from 0.0625 inches (16 Ga, approx. 1.59 mm) to 0.1046 inches (approx. 2.66 mm) or thicker.
Length	Standard lengths are commonly 10 feet, 12 feet, or 20 feet (approx. 3 m, 3.6 m, 6 m), but custom lengths are often available.
Hole Type	Predominantly round holes, but square or oval holes may also be available.
Hole Size	Typically about 7/16 inch (approximately 11 mm) in diameter, or customized to fit specific connectors.
Hole Spacing	Typically 1 inch (25.4 mm) on center.
Coating	Hot-dip galvanized, complying with relevant standards like ASTM A53, ASTM A500, etc.
Zinc Coating Thickness	Typically, it ranges from 1.2 to 2.0 ounces per square foot (about 35 to 60 microns), offering excellent corrosion resistance.
Tube Welding Method	The base tube is typically manufactured using the ERW (Electric Resistance Welding) method.
Connection Method	Bolt, pin, connector (no welding required)
Mechanical Properties	Tensile strength and yield strength depend on the specific steel grade. Typically, tensile strength is over 45,000 psi, and yield strength is approximately 33,000 psi.

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Advantages

Excellent Corrosion Resistance

High Strength and Durability

Ease of Assembly

Versatile Connections

Low Maintenance

Ventilation and Drainage

Applications

Structural Frameworks: Light and medium structural frameworks such as shelves, workbenches, machine guards, display racks, etc.

Sign Supports: Stable support structures for outdoor billboards, road signs, traffic signs, etc.

Fencing Systems: Quick assembly of temporary or permanent fences, railings, and safety barriers.

Agriculture and Horticulture: Greenhouse frames, plant support structures, agricultural equipment frameworks.

Storage Systems: Adjustable storage shelves and units.

DIY Projects: Popular among DIY enthusiasts for its easy assembly features.

Telecommunications and Power: Cable trays, equipment support structures, etc.

Manufacturing Process

Drilling: Use an automated drilling machine to accurately drill holes in the square pipe material following a precise pattern.
Hot-dip galvanizing: Clean the perforated steel pipe with chemical treatments such as degreasing, acid washing, rinsing, and flux coating. Then, immerse it in molten zinc at 440-460°C to form a zinc-iron alloy and a pure zinc coating for corrosion resistance. Finally, cool and inspect.

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Galvanized Steel Perforated Square Tube