Secondary containment system and method

B - Operations – Transporting – 67 – D

Patent

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Details

B67D 7/78 (2010.01) B67D 7/04 (2010.01) B67D 7/32 (2010.01) F17D 5/02 (2006.01) F17D 5/04 (2006.01)

Patent

CA 2498268

A pump housing that contains a pump that draws fuel from an underground storage tank containing fuel to deliver to fuel dispensers in a service station environment. The pump is coupled to a double-walled fuel pipe that carries the fuel from the pump to the fuel dispensers. The doublewalled fuel piping contains an inner annular space that carries the fuel and an outer annular space that captures any leaked fuel from the inner annular space. The outer annular space is maintained through the fuel piping from the pump to the fuel dispensers so that the outer annular space can be pressurized by a pump to determine if a leak exists in the outer annular space or so that fuel leaked from the inner annular space can be captured by a leak containment chamber in the pump housing.

Selon cette invention, un logement de pompe renferme une pompe qui aspire le carburant contenu dans un réservoir de stockage souterrain pour l'acheminer vers des distributeurs de carburant dans un environnement de station service. La pompe est couplée à un tuyau de carburant à double paroi chargé d'acheminer le carburant de la pompe vers les distributeurs de carburant. Les tuyaux de carburant à double paroi comprennent un espace annulaire interne qui transporte le carburant et un espace annulaire externe qui capture le carburant qui aurait pu fuir de l'espace annulaire interne. L'espace annulaire externe est conservé sur toute la longueur des tuyaux de carburant, de la pompe aux distributeurs de carburant, de sorte que l'espace annulaire externe puisse être pressurisé par une pompe de façon qu'on puisse détecter la présence d'une fuite dans l'espace annulaire externe ou que le carburant qui a fui de l'espace annulaire interne puisse être capturé par une enceinte de confinement de fuite située dans le logement de pompe.

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