| 摘要 |
PURPOSE: A pipe cleaning method and a pipe cleaning device is provided to deliver impact by using a solid-type cleaning material including mineral substances inside a pipe so that foreign materials are efficiently removed and heavy metals, poisonous gases, and offensive odors are adsorbed. CONSTITUTION: A pipe cleaning method using cleaning fluid comprises; a step for supplying heated fluid to a pipe and a step for supplying cooling fluid of a temperature lower than the heated fluid. The temperature of the heated fluid is 80-120°C. The temperature of the cooling fluid is 2-25°C.
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