Alloy Pipe,Pipe for chemical fertilizer facility ,Marine Pipe,Casing Pipe,Drill Pipe,Oil Pipe,Structure Pipe ,Pipe of ... A5310Casing and TubingJ55,K55,N80,L80,T95,P110,Q125(PSL1)API 5CT11Line pipeB,X42,X52API 5LCertified by seven classification societies, ... ), BV (France), NK (Japan), and GL (Germany).Certified by API (the American Petroleum Institute).Our Factory specializes in the production ...