... Pipe : GB701-88 Standard Q235B Q345B hot dipped galvanized Flat Bar Reference standard :GB , EN. ASTM A36Steel Grade :Q235B,Q345B,S235JRThickness ... strength, Elongation), Technical Properties (Flattening Test, Bending Test, Blow Test, Impact Test), Exterior Size Inspection, Hydrostatic Test, X-ray Test.Application ... help! GB701-88 Standard Q235B Q345B hot dipped galvanized Flat Bar