The existing Urea Handling Plant is a conveyors system for reception, stockpiling, reclaiming and shiploading; it consists of n. 16 belt conveyors, diverter gates, n.1 tripper, n. 1 portal reclaimer, n.1 shiploader, and it is part of the urea, ammonia and methanol production plant. Conveyor capacity = 180 t/h for stacking, 1000 t/h for shiploading. The off-shore side of the plant consists of belt conveyors of total more than 3500 meter long, located on stills, so that the environment is very corrosive. Reasons of changing the rollers from metallic to non-metallic on the performance of the conveyors: - low level of abrasion and corrosion of the roller (wear resistant). - high resistance to chemical agents - self-cleaning roller surface.