... transportation system of petroleum and natural gas industries api 5l b erw steel pipe Product nameERW carbon steel pipe (HFW/HFI ... class, prime, newly produced, secondary , stock etc.Material/steel gradeA, B, X42, X46, X52, X56, X60, X65, X70, L175, L175P, L210 ... sections- general structure purpose and pressure service etc. api 5l b erw steel pipe