Large Section Black Rectangular Pipe

For structural and industrial applications demanding exceptional strength-to-weight ratios, aesthetic appeal, and dimensional consistency, look no further than premium Large Diameter Black Rectangular Tube. This product is engineered to deliver superior performance in frameworks, supports, and architectural elements. When your project specifications call for substantial material with a clean, finished look, our Big Bore Black Rectangular Pipe offers the ideal solution. It provides the necessary cross-sectional area for heavy loads while maintaining a sleek, modern profile. For truly ambitious construction, manufacturing, or design projects that require components beyond standard sizes, our Oversized Black Rectangular Tube is the definitive choice, enabling grand-scale designs without compromising on structural integrity. At the core of many heavy-duty applications is the Large Size Black Rectangular Hollow Section, a versatile and robust product category designed to meet the rigorous demands of modern engineering and construction.


The Large Section Black Rectangular Pipe is manufactured to exacting standards, ensuring consistent quality and reliable performance. Its defining characteristic is the distinctive black oxide finish, which is not merely aesthetic but also provides a moderate layer of corrosion resistance, making it suitable for both interior and certain exterior applications. This finish is achieved through a controlled hot-rolling or forming process followed by specific cooling, resulting in a durable surface that is often preferred for its clean, uniform appearance in architectural designs where the steel will remain visible. The rectangular hollow section geometry offers excellent resistance to bending and torsion from multiple axes, providing predictable and efficient load-bearing capabilities. This makes the Large Section Black Rectangular Pipe a fundamental component in creating stable frameworks for buildings, industrial machinery guards, agricultural equipment, material handling systems, and modern furniture or fixture fabrication.

Key Specifications & Dimensions

  • Material Grades: Typically supplied in standard carbon steel grades such as ASTM A500 Grade B & C, A1085, or S355JR, offering high yield and tensile strength.
  • Standard Finishes: Mill finish with a black oxide scale. Options for pickled and oiled, or primed surfaces are often available.
  • Tolerances: Produced to strict dimensional tolerances on outside dimensions (O.D.), wall thickness (WT), and straightness as per ASTM A500 or equivalent international standards.
  • Common Wall Thickness: Ranges from 6mm (0.236 inches) to 25mm (0.984 inches) and beyond, depending on the size and application requirements.
  • Welding & Fabrication: Excellent weldability using common arc welding processes (SMAW, GMAW, FCAW). Can be easily drilled, cut, and machined.
Nominal Size (H x W) Outside Dimensions (mm) Wall Thickness (mm) Approx. Weight per Meter (kg/m) Common Application Scope
200mm x 100mm 200 x 100 8.0 36.5 Primary building columns, heavy support beams
250mm x 150mm 250 x 150 10.0 59.8 Industrial framework, bridge components
300mm x 200mm 300 x 200 12.5 92.5 Large-scale structural applications, port machinery
400mm x 200mm 400 x 200 16.0 147.0 Major construction projects, offshore structures

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