FIELD: cleaning of heat exchangers. SUBSTANCE: method proposed single pulse power density variation range in working interval within which power intensity is minimal. Method is implemented in device that has insulator 1, current lead 2, high-voltage electrode 3 with lug 4, both provided with axial hole 5 and cleansing ducts 6. Scale 13 is removed from tubes of heat exchangers 12 between lug 4 of high-voltage electrode 3 and steel tube of heat exchanger. In addition, device has flexible current lead 8 fitted in flexible insulating sleeve 7. EFFECT: improved cleaning efficiency, reduced power intensity of process. 3 cl, 3 dwg
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