FIELD: technological processes.
SUBSTANCE: invention relates to welding of polymer pipes with a heated butt-to-butt tool and can be used in polyethylene pipes welding at high temperatures of ambient air. Method of welding polymer pipes at high temperatures of ambient air involves a process of butt welding with subsequent cooling of joint with water, wherein ends of polyethylene pipes are pre-cooled to minus temperatures from specified temperature range of welding production.
EFFECT: obtaining high-quality welded joint due to prevention of formation of coarse-spherilitic supramolecular structure in area of welded joint by preliminary cooling of weld ends of pipes.
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