... line. 3.Certification:CE, ASTM Carbon Steel Pipes 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 ... fence, traffic signs.(3).Construction engineering: steel structure construction, sports venue, three-dimensional ...