FRP pultruded profiles have good surface properties: when composite materials mix with chemical medium products, surface generally has little corrosion product, rarely fouling. The pipeline resistance is a very small, low friction coefficient and that will save a lot of power.
Because the composite generally does not like the metal, which is easy to generate metal ion pollution medium, so that is why the food and pharmaceutical industries are widely used in composite products. In addition, the composite material has the friction is very high (PV) limit, underwater lubrication, the friction coefficient is very small, about 0.01 ~ 0.03, so it is the preferred material wear-resistant products.
