Electric Resistance Welded Steel Pipe Usage:Used for low pressure liquid ... Welded pipe HFI:High Frequency Induction weld pipe EFW:Electric Fusion Welded Pipe Standard:API 5L, API 5CT, ASTM 53, EN10217, ... , Q215, Q235, Q345, L175, L210, L245, L320, L360- L555 Surface:Fusion bond Epoxy coating, Coal Tar Epoxy, 3PE, Vanish Coating, Bitumen ...