Reference Standard Polyethylene Resins and Piping Materials. Final Report October 1, 1986-September 30, 1987

摘要

Polyethylene piping is currently in widespread use in gas distribution in the United States, and represents approximately 80% of new installation. Research that is currently being performed on gas pipes often employs many different polyethylenes selected from the large number of polyethylenes available for this use. This variation in materials makes it difficult to compare results from different research laboratories. To avoid this difficulty, the Gas Research Institute and the National Bureau of Standards (NBS) have undertaken to provide a permanent store of one particular polyethylene resin as well as piping and fittings made from it which would provide a source of well characterized materials for research related to gas distribution systems. The report describes characterizations performed on the two types of T-joints and the starting resin from which they were manufactured. In preliminary work it was found that the melt flow rate of material taken from the two types of joints differed from that of the starting resin and differed from each other by as much as a factor of two.