... , 904L, 410, 430,4Cr13.Tianjin development zone Ganghua Co.,Ltd which was established in 2006 had developed rapidly .At ... -75mmProduction technologyHot rolledCold rolledSurface treatmentCopper coatedGalvanizedothersortingStructural pipe, fluid pipe, boiler pipe, oil pipe, gas pipe, API pipe, alloy ... Employees:51 - 100 People Structural pipe, fluid pipe, boiler pipe, oil pipe, gas pipe, API pipe, alloy ...