... 904L, 410, 430,4Cr13.Tianjin development zone Ganghua Co.,Ltd which was established in 2006 had developed rapidly .At ... rolledCold rolledSurface treatmentCopper coatedGalvanizedothersortingStructural pipe, fluid pipe, boiler pipe, oil pipe, gas pipe, API pipe, alloy steel pipe, carbon ... 51 - 100 People Structural pipe, fluid pipe, boiler pipe, oil pipe, gas pipe, API pipe, alloy steel pipe, carbon ...