Does a church steeple with a lightning rod on it not show a lack of faith in god?
Generally, a resin is a liquid or combination of liquids that hardens into a transparent solid. A plastic is any organic solid that can be molded. Resins are often considered a subset of plastics.
No the consequent stress would be that derived from the formulation much less the losses with the aid of friction. those losses will selection with the diameter and variety of pipe. Losses in %pipe would be decrease than those in pipes with a rougher inner floor