... America etc. 3.Standard: GB/AISI/ASTM/JIS/API pipe line1.Grade:L245,L360,A53,J55,N80 ,X42,X46,X52,X56,X60 ... 1984 3.Applicant seamless steel tube for high pressure boilers Grade:20G,20MnG,25MnG,15MoG,20MoG,12Cr1MoVG,15CrMoVG,12Cr2MoG,12Cr2MoWVTiB, ... ,12Cr2MoStardandISO 9329-2-1997,ASTM A161-946. ApplicantSeamless steel pipe for Petroleum CrackingGrade:10,20,12CrMo,15CrMo,1Cr2Mo,1Cr5MoStardandGB9948-2006 ...