FIELD: industrial treatment of liquids; magnetic treatment of liquids in all industries. SUBSTANCE: liquid is subjected to treatment by pulsed electromagnetic field at pulse duration of 0.1 to 100 mks at instantaneous power of 50 to 5000 W and current frequency of 50 Hz to 30 kHz; use is made of any shape of pulses, those with negative edge inclusive. Proposed method enhances heat transfer conditions, thus excluding overheat of equipment; provision is made for reduced content of suspended matter and content of bactea. Provision is also made for using circulating water in closed system. EFFECT: reduced scaling of pipe lines, improved quality of water, increased service life of pipe lines. 4 ex
