DEVELOPMENT OF TECHNOLOGY OF POLYETHYLENE PIPES SOCKET WELDING FOR MINING INDUSTRY
N. P. Starostin, O. A. Ammosova
The Yakut Scientific Centre of the Siberian Branch of the Russian Academy of Sciences, Yakutsk, Russia
Keywords: Polyethylene pipes, socket welding, preheating, phase transition, piping systems, mining
Abstract
The proposed technology of polyethylene pipes socket welding can be used in construction of polyethylene pipe systems in mining industry. Based on numerical simulation of thermal process, the effect of low temperatures on the temperature field dynamics in socket weld joint is investigated. The need of preheating and usage of thermal insulation at the cooling stage during welding at low temperatures for the flow of heat process according to the patterns of welding at acceptable temperatures is shown. The procedure for calculating dimensions of heat-insulating chamber for cooling socket weld joint at low temperatures from the condition of ensuring cooling rate inherent to welding at acceptable temperatures is given.
|
