| 摘要 |
<p>Either (i) flexible resin impregnated lining tube (36) or (ii) a thermoplastic lining tube is placed in a pipeline or passageway to be lined. An apparatus (44) which emits radially directed microwave energy is passed through the lining tube (36) and as it does the radial energy is caused to rotate circumferentially to ensure thay the energy falls evenly on the lining tube. In case (i) the energy causes curing of the resin, so that a rigid lining pipe is formed on the pipeline or passageway, whilst in case (ii) the energy softens the tube enabling it to be expanded onto the pipeline or passageway surface.</p> |
