| 摘要 |
A method of testing a volatile liquid tank farm together with a vapour recovery system, to collect vapour from the tanks at the time of re-filling them with volatile liquid. The tank farm has individual fill-pipes (13) for each tank (10) with each fill-pipe outlet below the normal minimum liquid level in the tank and each tank having a vent-pipe (11) connected to a common manifold (25). To perform the test, the common manifold is closed to atmosphere and one side of a shut-off valve (17) is connected to the manifold (25), a flow meter (20) being connected to the other side of the shut-off valve. Flow meters (22, 23) are coupled to all but one of the fill-pipes (13), the shut-off valve (17) is opened to allow liquid to be supplied to the remaining fill-pipe so as to increase the volume of liquid in the associated tank, and the out-flow of gas or wet vapour from the common manifold (25) is monitored for substantial correlation to the volume of liquid admitted to the tank associated with the remaining fill-pipe. The method can be modified also to allow the testing of individual tanks of a tank farm, where the vent-pipes of the tanks individually vent to atmosphere, the test then being performed one at a time, on each tank.
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