hot-dipped galvanized steel pipe 1) material:Q195, Q215, Q235, Q345 ... .8-8mm 4) Length: 6000mm Hot-dipped galvanized steel pipe,galvanized steel pipe,galvanized steel tube1)material:Q195, Q215, Q235, Q3452 ... used as the pipeline of industrial and civilian water, air, petroleum, natural gas, communication and so on.InspectionWith ... made under the ISO9001:2000 strictly. hot-dipped galvanized steel pipe