| 摘要 |
<p>A method and apparatus for joining plastic pipes (10) is disclosed. An annular flange (20) is threaded onto an end portion of a plastic pipe (10) followed by the threading of an annular electrofusion coupler (30) onto the end portion of the plastic pipe (10). The annular electrofusion coupler is then energised to fuse it to the plastic pipe (10) and if an end portion of the plastic pipe (10) extends beyond the annular electrofusion coupler (30), it is trimmed to make it substantially flush with the electrofusion coupler. The above steps are performed on another similar plastic pipe (10) and the electrofusion coupler of both pipes are positioned substantially adjacent to each other and substantially in axial alignment with other and the two annular flanges (20) are secured to each other. The joined plastic pipes (10) could be free standing or buried directly in the ground or could be loosely fitted within another pipe (40).</p> |
