... ,BS3059:Part 2:1990 4.Applicant Seamless steel pipe for low and Medium pressure BoilerGrade:10,20 ... 9329-2-1997,ASTM A161-946. ApplicantSeamless steel pipe for Petroleum CrackingGrade:10,20,12CrMo,15CrMo,1Cr2Mo, ... G3441-19887. ApplicantSeamless steel pipe for Gas CylindersGrade:34Mn2V,30CrMo,35CrMo,45.8.Application1),API SPCE 5L For the ... ,superheater and steam pipeline of boilers. api 5l pipe line