Alloy Pipe,Pipe for chemical fertilizer facility ,Marine Pipe,Casing Pipe,Drill Pipe,Oil Pipe,Structure Pipe ,Pipe of Pipelines Code NO.VarietyNormal Steel GradeStandard ... ,35,45,27SiMnGB/T173969American Standard PipeA,BASTM A106 ASTM A5310Casing and TubingJ55,K55,N80,L80,T95,P110 ... France), NK (Japan), and GL (Germany).Certified by API (the American Petroleum Institute).Our Factory specializes in the ...