Galvanized rectangular steel pipe 1.Thickness: 1. ... CE,ISO,ASTM A500,JIS ASTM A500 Galvanized Rectangular Steel Pipe 1. STANDARD:GB/T3094-2000, ... Q275, Q345, 20#, 45#, Stainless steel, Seamless steel, Alloy steel.3. SURFACE:Bared, Galvanized, Oiled, Color Paint, 3PE; Or ... , road fence, traffic signs.(3).Construction engineering: steel structure construction, sports venue, three-dimensional garage, ...