... Rib Pipe 2.Pipe for Road culvert,mining,civil use 3.SS400 Q23 4.Galvanized and powder ... coated 5. ISO 9001 Corrugated Spiral Rib Pipe CMP is ... one kind of flexible, thin-wall, tube with lateral corrugation. It is elastic and ... The application fields of Assembly Corrugated Steel Culvert1.Highway and railway: culvert, passage, bridge, tunneling overhaul, ...