... TubingJ55,K55,N80,L80,T95,P110,Q125(PSL1)API 5CT11Line pipeB,X42,X52API 5LCertified by seven classification ... France), NK (Japan), and GL (Germany).Certified by API (the American Petroleum Institute).Our Factory specializes in the production ... Low/medium pressure boiler pipe, high pressure boiler pipe, alloy pipe, marine pipe, hollow sucker rod, oil cracking tube, tubing, American standard tube ...