1.pipe line 2.Mainly export to Southeast Asia,Africa,Mid East ... A501-98 ,ASTN A519-98, JIS G3441-1994 2.Applicant Seamless steel tubes for liquid serviceGrade 10,20 ... 10,20G,Q345,Q390,10MoVNb,12CrMo,15CrMo,12Cr2MoStardandISO 9329-2-1997,ASTM A161-946. ApplicantSeamless steel pipe for Petroleum ... transportation of gas,water,oill in oil&gas industry.2), API SPEC 5CT Tubing is used in extracting petroleum ...