| 摘要 |
<p>A spacer collar for pipelines is formed by one or more flexible spacer sections to be applied onto a pipe portion to be inserted in a larger diameter casing. Each section comprises a central portion (15) provided on one of its faces with spacing reliefs (6) having a cylindrical cross-section and being transversely wavy, and two fitting end portions (11, 12) provided with teeth for joining two adjacent end portions. Co-operating means (3, 8, 9) are provided on said fitting portions (11, 12) of said spacer section for longitudinally guiding and radially engaging two adjacent fitting end portions (11, 12), and the inner surface of the sections (10) forming the spacer is provided with interrupted projections (23) with a longitudinal or slightly inclined pattern. <IMAGE></p> |
