1.pipe line 2.Mainly export to Southeast Asia,Africa,Mid East,Eastern Asia,North America etc. 3.Standard: GB/ ... ApplicantHigh pressure seamless steel tube for chemical Fertilizer EguipmentsGrade:10,20G,Q345,Q390,10MoVNb,12CrMo,15CrMo,12Cr2MoStardandISO 9329-2- ... ASTM A161-946. ApplicantSeamless steel pipe for Petroleum CrackingGrade:10,20,12CrMo,15CrMo,1Cr2Mo,1Cr5MoStardandGB9948-2006,JIS G3441-19887. ...