Black Rectangular Pipe

Our Black Rectangular Steel Tube offers a robust and versatile structural solution, characterized by its distinctive flat black finish. This aesthetic not only provides a clean, modern look but also serves as a basic protective layer against minor corrosion during storage and handling. Often specified for visible architectural elements and industrial frameworks, it delivers a combination of strength and visual appeal. For applications requiring enhanced durability and a unique aesthetic, the Striped Rectangular Hollow Section is an excellent alternative, featuring a striped pattern that can improve grip and add a distinctive texture. When the highest quality surface condition is paramount, our Black Finished Rectangular Tube provides a superior, more consistent finish, ideal for high-visibility applications. Meanwhile, the Striped Rectangular Steel Pipe merges the structural benefits of a rectangular profile with the surface advantages of striping, offering a practical choice for both mechanical and construction uses.
The consistent quality of the **Black Rectangular Pipe** is rooted in precise manufacturing control, starting with high-grade steel. It is formed through a controlled process of roll forming and electric resistance welding, ensuring uniform wall thickness and superior dimensional accuracy. This results in a hollow structural section (HSS) with excellent load-bearing capacity and torsional resistance compared to other profiles. The **Black Rectangular Pipe** is typically supplied in standard mill lengths but can be custom-cut to specification, facilitating efficient fabrication and reducing on-site waste. Its geometry allows for clean, simple connections, making it a preferred material for fabricators and builders seeking efficiency and reliability in their structural designs.

Key Specifications & Technical Data

Understanding the precise parameters is crucial for specifying the correct product for your project. Below are the common specifications for our Black Rectangular Pipe range.

  • Material Grades: Typically ASTM A500 Grade B or C, A1085, or equivalent international standards (e.g., S355J2H).
  • Common Wall Thickness: Ranges from 1.5mm (16 gauge) to 12.7mm (1/2 inch) and beyond.
  • Standard Finishes: Mill finish (hot-rolled pickled and oiled), black oxide (commercial black), or painted.
  • Primary Manufacturing Process: Electric Resistance Welding (ERW) or Cold-Formed Welded.
  • Standard Lengths: 20 feet (6.1 meters) or 24 feet (7.32 meters). Custom lengths available.
  • Common Applications: Structural frames, handrails, machinery frames, architectural features, support columns, and agricultural equipment.
Standard Dimensional Tolerances for Black Rectangular Pipe
Dimension Tolerance (for typical sizes) Standard Reference
Outside Dimensions (Width & Height) ± 0.5% or ± 0.8mm, whichever is greater ASTM A500 / ASTM A1085
Wall Thickness ± 10% of nominal wall ASTM A500
Length +10mm / -0mm for cut lengths Common Mill Practice
Straightness ≤ 1.6mm per meter of length ASTM A500
Squareness of Ends ≤ 1° from 90° Common Fabrication Tolerance

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