| 摘要 |
<p>Process and device for inner sealing of pipes in which use is made of a sealing agent containing a solvent, a binder and a pigment, to which end the pipe is charged from below with the agent and it is placed under pressure. Then the agent is discharged and an elastically compressible plastic foam (sponge) is blown through the pipe from top to bottom. Finally, suction is applied to the pipe. Use is made of a pressure container which carries out filling and emptying of the pipe. This container also serves subsequently for collecting the plastic foam.</p> |
