... Asia,North America etc. 3.Standard: GB/AISI/ASTM/JIS/API pipe line1.Grade:L245,L360,A53,J55,N80 ,X42,X46 ... 4.Applicant Seamless steel pipe for low and Medium pressure BoilerGrade:10,20 StardandGB3087-2008,ASTM A179,ASTM A192,ASTM SA179,SA192,BS30595. ... Q390,10MoVNb,12CrMo,15CrMo,12Cr2MoStardandISO 9329-2-1997,ASTM A161-946. ApplicantSeamless steel pipe for Petroleum CrackingGrade:10,20,12CrMo,15CrMo, ...