| 摘要 |
<p>The present invention relates to a method for isolating a spirally wound pipe of a thermoplastic hole profile. The invention is characterized in that through each of the mainly radially directed side walls (2) of a hole profile (1) in the pipe at least one axially directed hole (3, 3a) is made so that a row of holes (3, 3a) located in line with each other is formed through the entire pipe, while the pipe is in a horizontal position and a row of holes (3a) is located uppermost in the pipe, a foaming lancet (4) is introduced into said or another row of holes (3, 3a) through the pipe, a foaming insulating mass (5) is dosed by turns into each segment of the spirally wound pipe after the lancet (4) is stepwise drawn back out of the holes (3, 3a), after which all boring holes (3) on the end surface of the pipe are plugged up, when the foaming is completed.</p> |
