1.X42 pipe line 2.Mainly export to Southeast Asia,Africa,Mid ... /ASTM/JIS pipe line1.Grade:L245,L360,A53,J55,N80 ,X42,X46,X52,X56,X60,X65,X702.End: round3.Package: In ... .Applicantcarbon structural steel seamless steel pipeGradeL245,L360,A53,J55,N80 ,X42,X46,X52,X56,X60,X65,X702. Stardand GB/T8162-2008 ... wall panel,economizer,reheater,superheater and steam pipeline of boilers. X42 pipe line