... Pipe,Pipe for chemical fertilizer facility ,Marine Pipe,Casing Pipe,Drill Pipe,Oil Pipe,Structure Pipe ,Pipe of Pipelines Code NO.VarietyNormal Steel ... GradeStandard NO.1Structure pipe10,20,35,45,Q235,Q295,Q345,40Cr etcGB/T81622Pipe for ... Pressure Boiler Tube10,20GB30875High pressure Pipe for Fertilizer Equipment10,20,16Mn, ...