... ,Eastern Asia,North America etc. 3.Standard: GB/AISI/ASTM/JIS pipe line1.Grade:L245,L360,A53,J55,N80 ,X42,X46,X52 ... -1988 ,JIS G3462-1998 DIN 17175-1979 ,BS3059:Part 2:1990 4.Applicant Seamless steel pipe for low and Medium pressure ... CrackingGrade:10,20,12CrMo,15CrMo,1Cr2Mo,1Cr5MoStardandGB9948-2006,JIS G3441-19887. ApplicantSeamless steel pipe for Gas CylindersGrade:34Mn2V,30CrMo,35CrMo,45.8 ...