Rectangular Steel Pipe (RHS) from China Suppliers - High-Quality Factory Manufacturing for Structural Applications
Detailed Description of Rectangular Steel Pipe (RHS)
Rectangular Hollow Sections (RHS), or rectangular steel pipes, are structural grade tubes with a rectangular cross-section. Similar to SHS, they are most commonly produced by ERW (Electric Resistance Welding) from steel strip, which is first formed into a round tube and then profiled into a rectangular shape. Hot forming is also a manufacturing method. RHS offers high strength in relation to its weight, particularly in bending along its major axis, making it an efficient material for beams and columns where load is primarily in one direction.
Key Parameters for Rectangular Steel Pipe
Parameter |
Details |
Manufacturing Process |
ERW (Cold Formed or Hot Formed), Seamless (less common for RHS) |
Standards |
ASTM A500 (Gr. A, B, C, D), EN10219 (S235JRH, S275J0H, S275J2H, S355J0H, S355J2H, S355K2H), EN10210 (S235JRH, S275J0H, S275J2H, S355J0H, S355J2H, S355NH, S355NLH), JIS G3466 (STKR400, STKR490), AS/NZS 1163 (C250, C350, C450) |
Steel Grade |
Q195, Q235, Q345 (Chinese Standards); Gr. A, B, C, D (ASTM A500); S235, S275, S355 (EN Standards); STKR400, STKR490 (JIS) |
Size (Side A x Side B) |
e.g., 20x30mm, 40x60mm, 50x100mm, up to 400x600mm or larger |
Wall Thickness (WT) |
0.8mm to 25mm (varies with size and standard) |
Length |
Usually 6m or 12m; can be customized |
Corner Radius |
Typically 2T to 3T (T = Wall Thickness), varies by standard |
Surface Treatment |
Black (bare/self-color), Oiled, Galvanized (Hot-dip or Pre-galvanized), Painted/Powder Coated |
Inspection |
Dimensional Check, Tensile Test, Yield Strength, Elongation, Weld Test (for ERW), Chemical Analysis |