... pipe line 2.Mainly export to Southeast Asia,Africa,Mid East,Eastern Asia,North America etc. 3.Standard: GB/AISI/ASTM/JIS/API pipe ... 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 ... steam pipeline of boilers. seamless pipe line