Methods and system for determining leaks in underground liquid s

Details Methods and system for determining leaks in underground liquid s Methods and system for determining leaks in underground liquid s

1987-02-13

1988-04-26

Levy, Stewart J.

Measuring and testing

With fluid pressure

Leakage

73299, G01M 326

Patent

active

047396482

ABSTRACT:
A system for detecting leaks over a designated test period in liquid storage tanks and like systems having underground tanks which are connected with good withdrawal systems. A fill pipe provides for obtaining a differential pressure measurement reflecting a difference in head of adjacent columns of liquid in the tank. One of the heads is stabilized at the beginning of the test, and prevented from changing as a result of any loss of liquid due to leak over the test period, while the other head is permitted to change with a lowering of surface level due to leaks. Both heads respond in the same way to a change in temperature which occurs during the test period. The differential pressure is monitored and any variation over the test time period is indicated.

REFERENCES:
patent: 3538746 (1970-11-01), Jacobs et al.
patent: 4646560 (1987-03-01), Maresca et al.

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