... pipe Out diameter:6mm-750mm Wall thickness:0.3-75mm Stainless steel is a production which not easy rust,acid resistance and ... treatmentCopper coatedGalvanizedothersortingStructural pipe, fluid pipe, boiler pipe, oil pipe, gas pipe, API pipe, alloy steel pipe, carbon steel pipe and so on. ... #,320#400#,600#), Hairline,aid pickling and so onProduction technologySeamless steel pipeWelded steel pipeSurface ...