Full definition
Conveyor belt that rolls into a closed tube shape (using 6 hexagonal idlers) during the carrying run, fully enclosing the material inside. Advantages: zero spillage, horizontal and vertical curves without transfer points, full environmental protection. Tube diameters: 150-600 mm. Brands: Continental ContiPipe, Bridgestone, Phoenix. Requires special belts with high transverse flexibility and precise forming characteristics for consistent tube formation throughout the carry run.