Q235B Hot DIP Galvanized Shs Rhs Square Rectangular Tube ASTM A500 for Building Structural Projects

1) Section: Square pipe is hollow square section, H-beam is I-shaped section; 2) Bending performance: H-beam wide flange, good bending performance, suitable for beams; square pipe symmetric section, good both bending and torsion, suitable for columns and trusses; 3) Connection: H-beam flange and web convenient connection, square pipe four flat surfaces even more convenient;

Square pipe specified by "side x side x wall thickness", e.g., 100x100x4.0 means side 100mm, WT 4.0mm. Common sizes: 20x20, 25x25, 30x30, 40x40, 50x50, 60x60, 80x80, 100x100, 120x120, 140x140, 150x150, 160x160, 180x180, 200x200, 250x250, 300x300, 350x350, 400x400, 450x450, 500x500mm. WT 1.5-16mm.

Yes. Square pipe hot-dip galvanized has 20-30 year anti-corrosion life, suitable for outdoor steel structures, curtain wall skeletons, guardrails. Hot-dip galvanized square pipe RMB 800-1200/tonne more expensive than black (galvanizing fee). Square pipe is hollow section, need tonote zinc flow inside pipe during galvanizing, ensure uniform inner wall galvanizing.

1) Welded connection: Square pipes or with other members directly welded, good sealing, high strength, but not detachable; 2) Bolted connection: Drill holes on square pipe, bolted connection, detachable, suitable for structures needing maintenance; 3) Flanged connection: Welded flange then bolted, detachable, suitable for pipes and structures needing frequent disassembly;

Stock from 1 pipe 3-7 days, common sizes same-day pickup; special sizes and materials custom rolling from 5 tonnes 15-30 days. Cutting, drilling, bending, welding, hot-dip galvanizing, painting etc. fabrication services available.