Welded Carbon Steel Pipe
ERW: Electric Resistance Welded Steel Pipe
HFI: High Frequency Induction Weld Pipe
EFW: Electric Fusion Welded Pie
Standard: API5L, API5CT, ASTM 53, EN10217, DIN 2458.is3598, JIS G3452, BS1387
Certificate: API 5L PSL1/PSL2, API5CT