Is there any significant difference in the ALDSs performance between pipelines carrying gas, liquid, multi-phase or crude oil?
There is no significant difference between liquid and gas lines. For the multiphase flow pipeline, depending on the actual void fraction, the flow regimes, and the steadiness of the flow regime, the leak location accuracy may reduce slightly (about +/- 100m to +/- 150m, instead of +/-30m). This is due to the uncertainty of acoustic velocity for the signals traveling between different phases of the fluid.
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