... railway6.Chemical composition7.SizeNamepipe line1.Applicantcarbon structural steel seamless steel pipeGradeL245,L360,A53,J55,N80 ,X42,X46 ... 1979 ,BS3059:Part 2:1990 4.Applicant Seamless steel pipe for low and Medium pressure BoilerGrade:10,20 ... 34Mn2V,30CrMo,35CrMo,45.8.Application1),API SPCE 5L For the purpose of transportation of gas,water ... superheater and steam pipeline of boilers. seamless pipe line