| 摘要 |
An electrofusion coupling device for use in forming joints in secondarily contained pipeline systems comprises an inner 11 and an outer electrofusion fitting 10, which are adapted to receive or extend within an end of a primary and a secondary pipe respectively. The electrofusion fittings incorporate electrical heating windings 15, where the inner and outer fittings are slidably mounted one within the other, for instance they may incorporate a rib 20 and channel 19 arrangement, where the rib is slidable within the channel. The rib and channel may include electrodes, which make mutual contact when the inner and outer fittings are mounted one inside the other. The electrofusion device may be used for pipework in petroleum installations such as on garage forecourts. |
