Analysis of pressure exertion’s effect on electrofusion welding process of polymer pipes

摘要

Electrofusion welding process is perhaps the most common method in joining of polymer pipes at time of installation. To provide a sturdy, ideal weld, certain parameters have to be accounted for in precise measure. One such item is applied pressure while process takes place. By conducting several experiments from welding to testing in joining of polymer pipes, required data was gathered from analysis of parameters mentioned. In particular, effect of pressure exertion, its quantity and duration was contemplated. Moreover, impact analysis of applied pressure as an effective parameter on welding of polymeric pipes has been investigated. This pressure is exerted to provide internal contact between melting surfaces and to prevent molten material escape from welding zone during expansion phase. In this study, optimized pressure of weld has been sought, measured, and recognized to provide high-strength weld. Shear strength at initial pressure and as its function, change in thickness of connection line, and displacement change were all measured through experimental methods designed and were utilized for this purpose. Tensile test was conducted to measure the amount of strength of the weld in pipes. The findings were indicative of optimized values of exerted pressure.