Storage tank leak detection

Details Storage tank leak detection Storage tank leak detection

G - Physics

01

M

G01M 3/32 (2006.01) F02B 3/06 (2006.01)

Patent

CA 2173588

A method of testing the leakage rates from tanks for containing volatile liquids such as petrol or diesel, with a view to determining whether the tank leaks excessively. The tank is at least partially filled during testing in order to save time. The leakage is detected by sealing the tank and measuring the drop in pressure in the tank over a period of time. In order to measure the rate of leakage, a first measurement is taken during which an amount of 380 ml is removed from the tank over a short period whilst otherwise sealed, with the resultant pressure drop being measured as a calibrated value. The tank is then re-sealed and the pressure drop over the period of an hour is compared with the calibrated value.

L'invention se rapporte à un procédé de test d'étanchéité de réservoirs destinés à contenir des liquides volatils tels que le pétrole ou le carburant Diesel, afin de déterminer si les fuites sont excessives. Le réservoir est au moins partiellement rempli au cours du test afin de gagner du temps. On détecte les fuites en fermant hermétiquement le réservoir et en mesurant la chute de pression dans le réservoir sur une période de temps. Afin d'obtenir le taux de fuite, on effectue une première mesure sur une courte durée au cours de laquelle on prélève 380 ml de liquide, le réservoir demeurant autrement hermétiquement fermé, la chute de pression résultante étant prise comme valeur étalon. On referme ensuite hermétiquement le réservoir et on compare la chute de pression, sur une heure, avec la valeur étalon.

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