| 摘要 |
The present invention relates to a method for cleaning a water pipe, removing a foreign substance from the interior of the water pipe. The method for cleaning a water pipe comprises: a first nitrogen injecting step of injecting nitrogen gas into the interior of the water pipe to discharge water from the interior of the water pipe to the outside, a second nitrogen cleaning step of injecting nitrogen gas at pressure, which is relatively higher than the pressure of the nitrogen gas in the first nitrogen injection step, into the interior of the water pipe during a reference time period to clean the interior of the water pipe. According to the present invention, the interior of the water pipe is cleaned using the nitrogen gas at high pressure such that, compared to typical cleaning water, the cleaning rate is improved, and the nitrogen gas at the relatively higher pressure can be injected, thereby allowing effective cleaning. |
