Testing and Processing # 1979 Brigthon
With the ever increasing cost of oil and that of plastics materials derived £ram it, there is an urgent need to use plastics materials to their maximum advantage. One large outlet for these materials i.s in plastics pipes for non pressure purposes In the larger diameters they are not competitive with pipes made £ran conventional materials such as asbestos cement.
This paper describes a new approach to the problem in which the plastics pipes are structured to optimum advantage resulting in a savirig of 60% raw material. Pipes made by this process have been subjected to laboratory and field tests with encouraging results.