| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a piping washing method capable of shortening an execution time by stopping red water in a short time when red rust adheres to the inner wall of piping. <P>SOLUTION: A sterilization-washing method for water supply piping for water service having red rust adhering to the inner wall thereof is disclosed. The method has a process for bringing an acid aqueous solution into contact with the inner wall of the piping to peel rust, a process for immobilizing rust (both processes may be performed in the same process or separate processes) and a process for intermittently supplying compressed air into the water supply piping while supplying water. <P>COPYRIGHT: (C)2003,JPO</p> |
