Dual containment pipe and method of installation

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

Patent

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Details

F16L 55/165 (2006.01) F16L 9/18 (2006.01) F16L 55/162 (2006.01) G01M 3/18 (2006.01) G01M 3/28 (2006.01)

Patent

CA 2181599

A dual containment pipe system (11) suitable for installation into an existing conduit (12) includes an impervious containment pipe adapted to be installed as a primary containment pipe and a crush resistant and flexible spacer element (14) disposed about the entire external circumference of the primary containment pipe (16). The annular spacer is formed of a plurality of spaced apart and parallel substantially crush-resistant longitudinal members with a plurality of spaced apart parallel flexible connecting ribs bonded thereto. The longitudinal members form a uniform annular space when the containment pipe suitable for installation of leak detection systems including cables or based on measuring pressure differentials. The new impervious primary containment pipe may be cured in place, flattened and folded diameter reduced pipe, or any other pipe suitable for pipeline rehabilitation.

Système à tuyau double de confinement (11) adapté pour être mis en place dans une canalisation existante (12). Le système comporte un tuyau de confinement imperméable servant de tuyau principal de confinement, et un élément écarteur souple et indéformable (14) s'étendant sur toute la circonférence externe du tuyau principal de confinement (16). Cet écarteur annulaire est formé d'une pluralité d'éléments longitudinaux parallèles, sensiblement indéformables et espacés les uns des autres auxquels sont fixées des nervures souples parallèles de liaison espacées les unes des autres. Les éléments longitudinaux forment avec le tuyau de confinement un volume annulaire homogène apte à accueillir des systèmes de détection de fuites comprenant des câbles ou fonctionnant par mesure de différences de pression. Le nouveau tuyau principal imperméable de confinement peut être formé par durcissement sur place, ou être un tuyau aplati et plié à diamètre réduit, ou tout autre type de tuyau utilisable dans la remise en état des canalisations.

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