FIELD: construction, pipeline.
SUBSTANCE: cylinder-shaped hard-rubber stopper is inserted inside the pipe into the open joint zone by means of a jib-stick with adjustable stop and a centering skid, diameter of the stopper is 1-1.5 mm less than internal diameter if the pipe. After melting and coupling of welded bearing faces the stopper is moved inside the pipe until adjustable stop of the jib-stick is pressed to the opposite bearing face, whereat the stopper is located in the welt zone limiting height of the flash.
EFFECT: ensured weld strength of the coupled plastic pipes limiting height of internal flash.
2 cl, 2 dwg
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