Management of thermal process for polyethylene gas pipes welding with built-in heater

Abstract

Abstract Based on the thermal process control, rapid welding technology for polyethylene pipes with built-in heater in the open air at temperatures below standard is proposed. Technological parameters of welding are determined by calculation from the condition of temperature field dynamics in heat-affected zone according to regularities, that are peculiar to welding at permissible temperatures. The results of determining the welding parameters during electrofusion welding and welding of the saddle branch to the polyethylene pipe of the gas pipeline, as well as the results of tests of the joints obtained by the proposed welding technology are presented.