... air and railway6.Chemical composition7.SizeNamepipe line1.Applicantcarbon structural steel seamless steel pipeGradeL245,L360,A53,J55,N80 ,X42,X46,X52,X56 ... G3441-19887. ApplicantSeamless steel pipe for Gas CylindersGrade:34Mn2V,30CrMo,35CrMo,45.8.Application1),API SPCE 5L For the purpose of transportation of ... wall panel,economizer,reheater,superheater and steam pipeline of boilers. seamless pipe line