1.X42 pipe line 2.Mainly export to Southeast Asia,Africa,Mid ... 3.Standard: GB/AISI/ASTM/JIS pipe line1.Grade:L245,L360,A53,J55,N80 ,X42,X46,X52,X56,X60,X65,X702.End ... 12Cr2MoStardandISO 9329-2-1997,ASTM A161-946. ApplicantSeamless steel pipe for Petroleum CrackingGrade:10,20,12CrMo,15CrMo,1Cr2Mo,1Cr5MoStardandGB9948-2006 ... panel,economizer,reheater,superheater and steam pipeline of boilers. X42 pipe line