CLEANING METHOD FOR PIPING AND CLEANING SYSTEM FOR PIPING

摘要

PROBLEM TO BE SOLVED: To efficiently clean piping in equipment with high cleaning capability.SOLUTION: There is provided a cleaning method for piping which includes the steps of: preparing cleaning water having a pH of 4 or below by supplying the cleaning water with acid; mixing ozone gas into the cleaning water; and introducing the cleaning water into cleaning object piping. Alternatively provided is a cleaning system 1 for piping which includes: a reservoir tank 10 for storing cleaning water; acid supply means 30 for supplying cleaning water with acid; ozone generation means 20 for generating ozone gas; a circulation flow passage 120 connecting the reservoir tank 10 with the ozone generation means 20 in a closed circulation state and including a circulation pump 420 for circulating the cleaning water between the reservoir tank 10 and the ozone generation means 20; and a water supply passage 140 connecting the reservoir tank 10 with cleaning object piping P and including a water supply pump 440 for supplying the cleaning water stored in the reservoir tank 10 into the cleaning object piping P.