... .grade:Q235,Q345,10#,20#,16Mn,L245,X80 2.standards:API,GB/T 3.OD:219-3000mm thickness:6-25mm Welded ... ,10#,20#,16Mn,L245,L290,L360,X70,X80, 2. Standards:API Spec5L/5CT,GB/T9711.2-1999,GB/T9711.1-1997 ... Pipe1.grade:Q235,Q345,10#,20#,16Mn,L245,X802.standards:API,GB/T3.OD:219-3000mm thickness:6-25mmIf any questions ...