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Measuring the oil transmission pipeline pressure method and comparison

The lowest cost way to transport oil through the pipeline transmission is compared to other methods, which is a large investment and low maintenance. Relatively speaking, because a wide range (hundreds of thousands of kilometers), passing through the complex environment, monitoring and maintenance is difficult. In particular controls, if they can find the first time crude oil leaks and other conditions, will be able to reduce loss and pollution to the lowest level degree.

1, the acoustic transmission test method.
Principle: A normal functioning of oil pipeline, oil hydraulic pressure, the temperature in a normal range, if there is a specific sound in which transmission will be a range of values​​. If leakage occurs, oil pressure, temperature, will change, resulting in changes in the speed of acoustic transmission. In this way the fixed launch point and the receiving point, each measured sound propagation speed transmission segment, and a system of judgment to identify abnormal segments.

2, sound monitoring method
Principle: If leakage occurs, percussion, fracture, etc., will have an abnormal noise, and in the pipeline spread. With the normal transmission of the sound spectrum for comparison to determine the fault point. Its difficulty is susceptible to the surrounding interference fit and used simultaneously with other methods.

3, pipe internal pressure test method

Principle: In the oil pipeline, and so fixed each 5Km or 10km distance, install a pressure test module, typically low frequency AC charge pressure sensor module, then the values ​​are concentrated on acquisition. If leakage occurs a certain point, that a leak point pressure value changes may occur, but also different from the other points, and according to the specific calculation, the fault point can lock 10 meters, or even higher accuracy range. The device, called oil charge amplifier module is a piezoelectric charge amplifier, 5 ~ 20mA transmission module.

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