Electrofusion Joining of Polyethylene Gas Pipes: Evaluation of Pipe Preparation,Joining Conditions and Mechanical Performance. Final Report, 1990-1995

摘要

There were three specific objectives of this research. First, a short timeacceptance test for EF (electrofusion) fittings that is fundamentally related to the long time field performance was to be developed that would permit the use of existing lifetime forecasting procedures to quantify joint lifetimes. The second objective was to determine the effects of the various design and installation variables such as power input, heating time, cool-down time, initial pipe-coupler clearance and ambient temperature on the service performance. The third objective was to investigate and quantify the effects of surface preparation and cleanliness on joint integrity. Four final reports have been published to cover the diversified technology developed in this research.