... 3.Applicant seamless steel tube for high pressure boilers Grade:20G,20MnG,25MnG,15MoG,20MoG,12Cr1MoVG,15CrMoVG,12Cr2MoG, ... 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 ...