steel pipe ,tube 1.Standard:BS,ASTM,GB/T,DIN 2.Material:Q195-Q345 10#,20#,45#, ... :21.3-2020mm 4.W.T:1.0-16.3 Steel pipe.tubeOur products strictly according to ISO9001 international quality system authentication ... CompanyTianJin RuiTong Steel Co., Ltd.TypeSteel Pipe (or tube) ManufacturerPlace of originChinaGradeQ195,Q215,Q235,Q345 ...