Our range in these types of chemical applications is extended by the addition of our new products such as the 20 Bar Rubber Alloy, Silicone hoses, TPR & Hytrel lined PVC hoses, and the Reinforced Polyurethane/PVC alloy RPUA hoses. These would be offered if price was a factor in relation to the costs of standard polyurethane hoses. Ribbed Polyurethane Hoses - hoses are designed with external and internal ribs to reduce the drag effect of polyurethane.