... use 3.SS400 Q23 4.Galvanized and powder coated Culvert Corrugated Metal Pipe CMP is one kind of flexible, thin-wall, tube ... , side direction, and combination displacement. The application fields of Assembly Corrugated Steel Culvert1.Highway and railway: culvert, passage, bridge, tunneling overhaul ... : hot dipped galvanized≥63μm; Reantiseptic (genearlly coated asphalt) Culvert Corrugated Metal Pipe