| 摘要 |
A purge tee assembly 10 for purging a plastics pipeline comprises a saddle 18, provided with a saddle-shaped saddle electrofusion element 24, a hollow body 12, integral with the saddle and provided with an axial bore 26 and an externally screw threaded end 30 distal to the saddle. The externally screw threaded end receives a first screw cap 34. There is provided a cutter 28 disposed within the axial bore. A tubular spigot 22, which is integral with the hollow body, has a spigot bore 22a in fluid connection with the axial bore of the body. The purge tee assembly is characterised in that the spigot is in connection with a tubular elbow 14, having a distal outlet in the form of an adaptor 16. The adaptor 16 is screw threaded to receive a second screw cap 40, as well as eg a vent pipe (52, fig.3b) and other ancillary apparatus. The apparatus may be used for purging a mains gas pipe in the field before and after working on the pipe. |
