... .Standard: GB/AISI/ASTM/JIS pipe line1.Grade:L245,L360,A53,J55,N80 ,X42,X46,X52,X56,X60,X65,X702.End: ... 1984 3.Applicant seamless steel tube for high pressure boilers Grade:20G,20MnG,25MnG,15MoG,20MoG,12Cr1MoVG,15CrMoVG,12Cr2MoG,12Cr2MoWVTiB,12Cr3MoVSiTiB ... Gas CylindersGrade:34Mn2V,30CrMo,35CrMo,45.8.Application1),API SPCE 5L For the purpose of transportation of gas,water,oill in oil&gas industry.2 ...