| 摘要 |
<p>Plug, comprising a bolt (3) on whose shaft the sealing means and mechanical anchoring means are threaded, the latter being expansible and capable of being applied against the internal surface of a pipe by tightening a nut (4) engaged on the screw thread of the bolt, which plug is characterised in that the sealing means (7, 8) comprise a rigid ring (11) receiving at least one elastically deformable annular sealing joint (121, 122, 123, 124), the length of the rigid ring being such that it determines, after tightening the closure plug using the nut, the maximum degree of axial compression of the sealing joint. <IMAGE></p> |
