| 摘要 |
<P>PROBLEM TO BE SOLVED: To coat an outer surface of a cast iron pipe having a coated inner surface at proper temperature without damaging a beautiful appearance of a pipe inner surface. <P>SOLUTION: After the cast iron pipe 1 having the coated inner surface is preheated with hot water, the inner surface is washed with a roller brush 13 and then the outer surface is coated at least one time. Foreign matter stuck from the hot water on preheating and remaining on the inner surface of the pipe is removed by brush washing. Thus the outer surface of the cast iron pipe having the coated inner surface can be coated at proper temperature without damaging the beautiful appearance of the pipe inner surface. <P>COPYRIGHT: (C)2013,JPO&INPIT |
