FIELD: technological processes.
SUBSTANCE: invention relates to welding of polymer pipes by heated butt-to-butt tool and can be used in welding of thick-walled pipes. Technical result is achieved by welding thick-walled polymer pipes, which consists in welding with heated butt-to-butt tool. At the same time in the middle of both ends of polyethylene pipes identical round grooves with a rounded bottom and depth are pre-cut, providing arrangement of surface oxide layer from the middle part of surfaces of ends. Heating time must correspond to the heating time of the pipe by twice the reduced thickness of the wall.
EFFECT: higher quality of welded joint.
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