Hollow Structural Section Steel Pipe - China Suppliers and Factory for Construction and Fabrication
Product Overview
| Product | Square and Rectangular Steel Pipe |
| Material | Carbon Steel |
| Grade | Q195 = S195 / ASTM A53 Grade A |
| Q235 = S235 / ASTM A53 Grade B / ASTM A500 Grade A / STK400 / SS400 / ST42.2 | |
| Q345 = S355JR / ASTM A500 Grade B / ASTM A500 Grade C | |
| Standard | DIN 2440, ISO 65, EN10219, GB/T 6728 |
| JIS G3444, JIS G3466 | |
| ASTM A53, ASTM A500, ASTM A36 | |
| Surface | Bare / Natural black / Painted |
| Oiled with or without wrapping | |
| Ends | Plain ends |
| Specification | Square: 20×20 mm – 500×500 mm |
| Rectangular: 20×40 mm – 300×500 mm | |
| Wall Thickness: 1.0 mm – 30.0 mm | |
| Length: 2 m – 12 m |
Key Features
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High Strength-to-Weight Ratio
Hollow cross-section provides excellent load-bearing capacity while minimizing material consumption.
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Versatile Applications
Suitable for structural, mechanical, architectural, and industrial uses.
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Precise Dimensions
Manufactured to tight tolerances for consistent quality and ease of fabrication.
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Excellent Weldability
Compatible with standard welding techniques for assembly and joining.
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Multiple Finishes
Available in bare, painted, or oiled surfaces to suit different environmental conditions.
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Customizable Lengths
Can be cut to specific lengths per project requirements.
Application
| Application Area | Common Uses |
| Construction & Building | Structural support, building frameworks, architectural components |
| Structural Pipe | Load-bearing columns, trusses, industrial frameworks |
| Fence Posts | Perimeter fencing, security barriers, agricultural fencing |
| Solar Mounting Components | Support structures for solar panels and mounting systems |
| Handrail Pipe | Stair railings, balcony railings, safety barriers |
Frequently Asked Questions
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What materials are available for square and rectangular steel pipes?
Our square and rectangular steel pipes are made from carbon steel, available in grades Q195, Q235, and Q345, which correspond to international standards including ASTM A53, ASTM A500, and EN S235/S355JR grades.
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What size range is available for square and rectangular steel pipes?
Square pipes are available from 20×20 mm up to 500×500 mm, and rectangular pipes from 20×40 mm up to 300×500 mm. Wall thickness ranges from 1.0 mm to 30.0 mm, with lengths available from 2 m to 12 m.
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What surface finish options are available?
We offer multiple surface finish options including bare (natural black), painted, and oiled — with or without wrapping. These options help protect the pipes during storage, transportation, and use in various environmental conditions.
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Which international standards do your steel pipes comply with?
Our steel pipes comply with a wide range of international standards, including DIN 2440, ISO 65, EN10219, GB/T 6728, JIS G3444, JIS G3466, ASTM A53, ASTM A500, and ASTM A36, ensuring compatibility with global project requirements.
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Can the steel pipes be customized to specific project lengths?
Yes. Our square and rectangular steel pipes can be cut to custom lengths based on your specific project requirements, within the standard range of 2 m to 12 m. Please contact us with your specifications for a tailored quote.
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What are the most common applications for square and rectangular steel pipes?
These pipes are widely used across many industries including construction and building (structural support, frameworks), industrial structures (load-bearing columns, trusses), fencing (perimeter and agricultural), solar panel mounting systems, and handrail installations (stair and balcony railings).