... Chemical composition7.SizeNamepipe line1.Applicantcarbon structural steel seamless steel pipeGradeL245,L360,A53,J55,N80 , ... BS3059:Part 2:1990 4.Applicant Seamless steel pipe for low and Medium pressure BoilerGrade: ... 10,20 StardandGB3087-2008,ASTM A179,ASTM A192,ASTM SA179,SA192,BS30595. ApplicantHigh pressure seamless ... pipeline of boilers. seamless pipe line