steel pipe ,tube 1.Standard:BS,ASTM,GB/T,DIN 2.Material:Q195-Q345 10#,20#,45#, ... system authentication CompanyTianJin RuiTong Steel Co., Ltd.TypeSteel Pipe (or tube) ManufacturerPlace of originChinaGradeQ195,Q215,Q235,Q345,X42,X60,X65,X70 ... bundles, with hexagonal water proof plastic tarpaulin cover. steel tags ASTM A500 erw carbon steel pipe