API 5L Welded (ERW, LSAW, SSAW) Steel Line Pipe
High level: API 5L X60 PSL1, PSL2 LSAW line pipe High: API 5L X65 PSL1, PSL2 LSAW/SSAW line pipe Premium high: API 5L X70 Premium high: API 5L X80. PSL2 pipe comes with suffix letter of N, Q, M, eg API 5L X52N, API 5L X60Q/M. Sour service pipe with suffix letter NS, QS, MS, eg API 5L X65QS. Suffix Letter N, Q, M, S. R: As rolled