Electric Resistance Welded Steel Pipe ( ERW Steel Pipe ) Usage:Used for low pressure liquid delivery, such as water, gas, and oil. Oil drilling and machinery manufacturing, etc. ERW: Electric Resistance Welded pipe HFI: High Frequency Induction weld pipe EFW: Electric Fusion Welded Pipe Standard: API 5L, API 5CT, ASTM 53, EN10217, DIN 2458. IS 3589, JIS G3452, BS1387 Certificate: API 5L PSL1/ PSL2, API 5CT Out Diameter: 21.3mm-610mm Wall Thickness:1.8 - 22mm Length:0.3-12m Steel Grade:API 5L : GR B, X42, X46, X56, X60, X65, X70 ASTM A53: GR A, GR B, GR C EN: S275, S275JR, S355JRH, S355J2H GB: Q195, Q215, Q235, Q345, L175, L210, L245, L320, L360- L555 Surface: Fusion bond Epoxy coating, Coal Tar Epoxy, 3PE, Vanish Coating, Bitumen Coating, Black Oil coating as per customer's requirement