... 12Cr2MoStardandISO 9329-2-1997,ASTM A161-946. ApplicantSeamless steel pipe for Petroleum CrackingGrade:10,20,12CrMo,15CrMo,1Cr2Mo,1Cr5MoStardandGB9948 ... -2006,JIS G3441-19887. ApplicantSeamless steel pipe for Gas CylindersGrade:34Mn2V,30CrMo,35CrMo,45.8.Application1 ... gas. casing pipe serves as wall of well.3), ASTM A106 For the purpose of the pipeline project of boiler,water ...