Secondary containment flexible underground piping system

F - Mech Eng,Light,Heat,Weapons – 16 – L

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F16L 7/00 (2006.01) B67D 7/78 (2010.01)

Patent

CA 2175333

The secondarily contained piping system having two spaced access chambers (20) that are interconnected by a secondary containment pipe (24) to provide a sealed arrangement for a flexible fluid supply pipe, the ends of which are disposed within the access chambers. The outer flexible pipe (42) is sized to permit the insertion and/or removal of the primary flexible pipe (40) during installation and testing of the same and after backfilling of the trench within which the pipe is disposed, the outer flexible tubing partially collapses to engage and prevent relative movement between the two pipes while providing a flow path thereinbetween.

Cette invention se rapporte à un système de canalisation à confinement secondaire, qui comporte deux chambres d'accès espacées (20), lesquelles sont reliées entre elles par un tuyau de confinement secondaire (24), afin d'assurer l'étanchéité d'un tuyau d'amenée de fluides flexible, dont les extrémités sont disposées à l'intérieur des chambres d'accès. Le tuyau flexible externe (42) est conçu avec des dimensions qui permettent d'introduire le tuyau flexible primaire (40) et/ou de retirer ce tuyau flexible primaire, pendant les opérations qui visent à installer et à tester ledit tuyau flexible primaire et après l'opération de remblayage de la fouille dans laquelle est déposé ledit tuyau, le tuyau flexible externe étant conçu de façon à s'affaisser partiellement pour venir en contact avec le tuyau flexible primaire et pour empêcher tout mouvement relatif entre les deux tuyaux, tout en assurant un passage d'écoulement entre eux.

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