72-05: Plastic Piping Systems in Cooling Tower DesignPlastics were discovered not quite 100 years ago by a fanatical sportsman who could not get enough ivory for production of his billiard balls and discovered cellulose acetate as a synthetic billiard ball material. After a rather unusual and lethargic start, plastics made inroads into every imaginable market at fantastic rates: in fact, due to the universal use of plastics, the past three decades could rightfully be called the "age of Plastics".