... Roller Extrusion equipment line. 3.Certification:CE, ASTM Carbon Steel Pipes 1. STANDARD:GB/T3094-2000, GB/ ... , Q235, Q275, Q345, 20#, 45#, Stainless steel, Seamless steel, Alloy steel.3. SURFACE:Bared, Galvanized, Oiled, Color Paint, ... 5-14.0400*8007.5-32.0 What advantage do we have?Our factory established ... beginning of company established, now our technology is far ahead.We have a leading international ...