FIELD: pipeline transport. SUBSTANCE: width of circular groove in bushing is larger than double distance from pipe end at which material of coating is not melted as a result of welding heat effect. Thermoplastic material similar to coating material is placed in circular groove of bushing. Coating material inside pipe end is removed for distance at which it is not destructed but melted by welding heat. Thermoplastic material of bushing is covered by heat-insulating material, its width being equal to length of uncovered ends of pipes. Then bushing is positioned inside ends of pipes, with ends of bushing thermoplastic material entering inside ends of pipe coating. Ends of heat- insulating material thrust upon coating ends. Pipes are connected by welding. EFFECT: enhanced reliability of connection. 1 dwg
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