Galvanized Pipes, Square Rectangular Pipes, ERW Pipes manufacturer / supplier in China, offering Q195 Q215 Q235 Q255 Q275 Ss400 Q355 Gi Steel Tube Galvanized Steel Pipe, Construction A36 A53 S275 S235jr Q195 Q235 Pre Round Gi Tube Hot Dipped Galvanized Steel Pipe, 100X100X3mm High Zinc Coating Galvanized Steel Round Tube Square Tube Perforated Material Gi Pipe and so on.