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Octagonal Steel Pipe

Octagonal Steel Pipe | Premium Custom Shaped Steel Tubing

Precision-engineered octagonal hollow sections for architectural aesthetics and structural durability.

The Octagonal Steel Pipe (also known as Octagonal Hollow Section) is a specialized cold-formed steel profile designed for modern engineering. Unlike standard round or square tubes, its unique eight-sided geometric structure offers superior torsional resistance and visual appeal.

Combining structural integrity with architectural versatility, our pipes are manufactured using advanced cold-drawing or welding technologies. They are the preferred choice for high-end curtain walls, heavy machinery frames, and automotive components where strength and precision are paramount.

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Octagonal steel tube Specifications

Specification Details Notes
Outer Diameter (O.D.) 100mm – 500mm (Across Flats) Custom sizes available upon request
Wall Thickness (W.T.) 4.0mm – 30.0mm Heavy wall thickness supported
Length 6m, 12m, or Cut-to-Length Tolerance: ±5mm
Material Grade Carbon Steel: Q235B (S235JR), Q345B (S355JR), 20# (ASTM A106 B)

 

Stainless Steel: AISI 304, 316L

 

Alloy Steel: 4140, 42CrMo

Mill Test Certificate (MTC) provided
Surface Finish Black (Bare), Oiled, Hot Dip Galvanized, Powder Coated, Polished Customizable based on corrosion requirements
Technique Cold Drawn / Welded / Extruded High precision molding

Octagonal tubes Technical Parameters

Parameter Value / Description
Tensile Strength 370 – 620 MPa (Depending on material grade)
Yield Strength ≥ 235 MPa (Mild Steel) / ≥ 345 MPa (Low Alloy)
Dimensional Tolerance O.D.: ±0.5% ~ ±1%

 

W.T.: ±10%

Straightness ≤ 1.5mm / m (Ideal for long-span structures)
Corner Processing Sharp or Rounded corners tailored to blueprint

Octagonal Steel Pipes Applications

Our Octagonal Steel Pipes are trusted across diverse industries:

Architecture & Construction: Steel structure columns, airport terminal frameworks, glass curtain wall supports, and decorative facades.

Heavy Machinery: Crane booms, agricultural machinery frames, and transmission shafts.

Automotive & Transport: Chassis reinforcement, roll cages, and shipbuilding components.

Municipal & Furniture: High-end street lamp posts, guardrails, and designer metallic furniture.

Our Key Advantages

1.Superior Geometric Stability

The octagonal shape distributes load more effectively than standard round pipes, offering enhanced resistance to bending and torsion. Ideal for structural columns and beams.

2.Exceptional Durability

Available with advanced surface treatments—including Hot Dip Galvanizing and epoxy coating—to withstand harsh environments, humidity, and chemical exposure.

3.One-Stop Customization

Beyond manufacturing, we provide value-added services including precision cutting, bending, punching, and welding. We deliver ready-to-assemble components to save you time and labor costs.

4.High Precision Finish

Our cold-drawing process ensures a smooth surface finish and tight dimensional tolerances, minimizing the need for on-site adjustments.

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FAQ 

Q: Can you manufacture octagonal pipes with non-standard dimensions?

A: Yes. We have an in-house mold design team. We can develop new molds based on your CAD drawings or samples to produce specific sizes or special corner radii.

Q: How do you ensure product quality?

A: Our Quality Control process includes chemical analysis of raw materials, on-line eddy current testing for weld integrity, and final mechanical testing (tensile/bending). A Mill Test Certificate (MTC) is shipped with every order.

Q: What is your Minimum Order Quantity (MOQ)?

A: For stock sizes, the MOQ is 1 ton. For custom sizes requiring new production runs, the MOQ typically starts at 3-5 tons, depending on the specifications.

Q: How is the product packaged for export?

A: Pipes are bundled in hexagonal or octagonal shapes, secured with steel strips, and fitted with lifting slings. For sea freight, we recommend waterproof wrapping or wooden crating to prevent rust.

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