Preliminary Design Concepts for an Advanced Gas Distribution System. Final Phase:Evaluation of Impact Resistance. Final Report, September 1990-November 1992

摘要

The results of the previous research in Phases 1 and 2 indicate that the gasdistribution industry needs enhanced protection against third party damage. In 1990, the program was focused on developing cost effective products that can be integrated easily into a polyethylene-based distribution system. Accordingly, coextruded pipe designs with a polyethylene core and a damage-tolerant outer layer won top priority. In the final phase of the research, samples of 2-inch and 4-inch coextruded pipes were prepared in which the core was TR418 polyethylene, and the candidate outer layers included an ionomer, a modified multiphasic polypropylene, and low density polyethylene.