1.Flanged Crrugated Steel Pipe/Plate 2.Pipe for Road culvert,mining,civil use 3.SS400 ... Q23 4.Galvanized and powder coated Flanged Crrugated Steel Pipe/Plate CMP is one kind of flexible, thin-wall, tube with ... , tunneling overhaul, temporary sidewalk2. Municipal works and construction: utility tunnel, optical cable protection, drainage pitch3. Water conservancy: culvert, passage, bridge, pilotage ...