Galvanized rectangular steel pipe 1.Thickness: 1.5-32.0mm 2. Advanced Roller Extrusion equipment line. 3.CE,ISO,ASTM A500,JIS ASTM A500 Galvanized Rectangular Steel Pipe 1. STANDARD:GB/T3094-2000, GB/T6728-2002, ASTM A500, JIS G 3466, DIN EN 10210, GB/T178-20052. MATERIAL:Q195, Q215, Q235, Q275, Q345, 20#, 45#, Stainless steel, Seamless steel, Alloy steel.3. SURFACE:Bared, Galvanized, Oiled, ...