FIELD: machine building.
SUBSTANCE: heat source in the form of heated medium with temperature above fluid temperature in pipeline is applied to pipeline surface; time diagram of bar temperature variation at absence of temperature gradient about heated medium near it is picked up. At that, in order to eliminate temperature gradient on pipeline surface near the heated medium about it on the pipeline there installed is additional heat source in the form of a ring.
EFFECT: higher accuracy for determining the thickness of deposits on internal surface of pipelines; enlarging the area of possible application.
3 dwg
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