... Germany, France, Turkey, USA, Canada, Taiwan, Korea, Vietnam, India , Pakistan, Iran, and so on. Steel pipematerialGB10#,20#,45#,20G ... rolledCold rolledSurface treatmentCopper coatedGalvanizedothersortingStructural pipe, fluid pipe, boiler pipe, oil pipe, gas pipe, API pipe, alloy steel pipe, ... - 100 People Structural pipe, fluid pipe, boiler pipe, oil pipe, gas pipe, API pipe, alloy steel pipe, carbon ...