| 摘要 |
<p>A pipe coupling comprising a tubular sleeve (10) having flared ends (11) to receive tapered resilient sealing rings (12) which seal internally against the walls of two pipe ends (20, 21) to be coupled, with clamping rings 16 at opposed ends of the coupling which are drawn together by bolts (19) to cause the sealing rings (12) to be compressed and to form a seal both internally and externally. Pipe 21 is smaller in diameter than pipe 20, so that the associated sealing ring 12 must also be of reduced diameter. A metal support ring (23) having an internal diameter equivalent to the outer diameter of the smaller pipe (21) prevents the material of the smaller sealing ring (12) from being extruded along the pipe wall. <IMAGE></p> |
