... -1016mm Thickness:3.5-60mm Brand:Tigersteel Certificate:ISO,API API 5l x52 ERW line pipe 1)Standard:GB, DIN, JIS, ASTM2)Grade:10 ... #,20#,ST35,ST37,ST52,16Mn,A53-A369,API J55-API P110,Cr ... : a. Low and middle pressure fluid transportation pipe lines b.Casing tube c.Boiler pipes d.Conveyance of electricity API 5l x52 ERW line ...