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 A53,EN10217,DIN2458,IS3589,JIS G3452,BS1387 Certificate:API 5L ISO CE Our diameter:21.3mm-610mm Wall Thickness:1.8-22mm Length:0.3-12m Steel Grade:API 5L GR.B,X42,X46,X56,X65,X70 ASTM A53 GRADE A,GRADE B EN:S275,S275JR,S355JRH,S355J2H Surface:Fusion Bond Epoxy Coating,Coal Tar Epoxy,3PE,FBE,Varnish coating,Bitumen coating,Black Oil coating as per customers requirement Test:Chemical Component Analysis,Mechanical Properties(Utimate Tensile Strength,Yield Strength,Elongation),Technical Properties(Flattening Test,Bending Test,Blow Test,Impact Test),Exterior Size Inspection,Hydrostatic Test. Mill Test Certificate:EN10204/3.1B