... -900g/m2 3. Strong productivity GB/T 3094 erw welded hot dip galvanized carbon mild steel production hollow sections pipes and tubos ... A 53: Gr. A, Gr B, Gr C, Q195, Q215, Q235, Q275, Q295, Q345,08F, 08, 08AL, HG5, DF08, S355JOH, ... industry, supermarket goods shelf and so on.Our Popular Size (Hot Sales!) GB Main Products (Specification)Rectangle pipe SpecificationThicknessSpecificationThickness20*301. ...