Application In Structure Pipe Product Details:StandardGB, ASTMStandardGB/T 3091-2001, ASTM A53-2007GradeA53-A369, Q195-Q345GradeA53(A,B), Q235, Q345, Q195, Q215Thickness0.5 - 15 mmSection ShapeSquareOuter Diameter20*20-600*600Place of OriginTianjin, China (Mainland)Secondary Or NotNon-secondaryApplicationStructure PipeTechniqueERWCertificationISOSurface TreatmentGalvanizedSpecial PipeThick Wall ...