... GB/AISI/ASTM/JIS pipe line1.Grade:L245,L360,A53,J55,N80 ,X42,X46,X52,X56,X60,X65, ... SizeNamepipe line1.Applicantcarbon structural steel seamless steel pipeGradeL245,L360,A53,J55,N80 ,X42,X46,X52,X56,X60,X65,X702 ... 10,20,Q295,Q345 Stardand GB/T8163-2008,ASTM A53-98 ASTM A192 ASME S192 JIS G3452-1998 ... pipeline project of boiler,water&petroleum.4), ASTM A53 It is used for conveying water,petrolem,gas and ...