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Electric Resistance Welded 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. Test: Chemical Component Analysis,Mechanical Properties(Ultimate tensile strength,yield strength,yield strength,elongation)Technical Properties(Flattening Test,Bending Test,Blow Test,Impact Test),Exterior Size Inspection,Hydrostatic Test,X-ray Test. Mill Test Certificate: EN 10204/3.1B