Dynamic interference potential test system for buried pipeline

A buried pipeline and testing system technology, applied in the pipeline system field, can solve the problem of low accuracy of interference corrosion risk assessment methods, and achieve the effect of avoiding potential errors

Active Publication Date: 2014-12-24
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

[0005] The present invention provides a dynamic interference potential test system for buried pipelines to solve the technical problem of low accuracy of the interference corrosion risk evaluation method existing in the prior art

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  • Dynamic interference potential test system for buried pipeline
  • Dynamic interference potential test system for buried pipeline
  • Dynamic interference potential test system for buried pipeline

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Embodiment Construction

[0014] In order to enable those skilled in the technical field to which the application belongs to understand the application more clearly, the technical solutions of the application will be described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0015] The buried pipeline dynamic interference potential testing system involved in the present invention includes a high-frequency data acquisition device 1, a data processing device 2, and a polarization probe 3; wherein, the data processing device 2 is equipped with Fourier transform data software.

[0016] See below figure 1 , is the installation diagram of the dynamic interference potential test system for buried pipelines. The sampling frequency of the high-frequency data acquisition device 1 is greater than or equal to 100 Hz.

[0017] The bottom of the polarized probe 3 is buried in the soil 5 around the buried pipeline 4, the buried pipeline 4 is generally cylindrical, and the...

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Abstract

The invention discloses a dynamic interference potential test system for a buried pipeline. The dynamic interference potential test system comprises a polarized probe, a high-frequency data acquisition device and a data processing device. As the polarized probe replaces a traditional copper sulfate reference electrode, valid data can be provided for corrosion risk assessment of a pipeline at a defect point of the corrosion protection layer of a simulating pipeline, and at the same time potential errors brought by the placement position of the traditional copper sulfate reference electrode are avoided; excavation and measurement for soil electric resistance around the buried pipeline are not needed, a test method is simplified, and further errors brought by orientation of measurement for soil electric resistance are eliminated. The high-frequency data acquisition device is used for acquiring data, and then the data is transmitted to the data processing device for Fourier transform, so that conversion from time domain to frequency domain of the AC-DC superimposed dynamic potential can be obtained, the frequency component of stray current can be accurately judged, and the size of DC potential and the source and size of AC interference can be accurately obtained.

Description

technical field [0001] The present application relates to the technical field of pipeline systems, in particular to a dynamic interference potential testing system for buried pipelines. Background technique [0002] The stray current generated by the electrical system around the pipeline will have a serious impact on the buried metal pipeline and its ancillary facilities, which is a dynamic interference, especially the corrosion caused by the AC electrical system, which has high intensity, wide range, strong randomness, and difficult governance Large and other characteristics, the pipe-to-ground potential presents a dynamic wide range change, which is far beyond the requirements of cathodic protection. In most cases, high positive potential and high negative potential appear, up to 8-9V, resulting in severe local corrosion. For wall thickness 8 ~9mm steel pipes will be perforated within a few months, seriously affecting the safe operation of the pipes. [0003] At present, ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F13/22
Inventor 马金福张鹏陈卓刘震军王超谢涛
Owner BC P INC CHINA NAT PETROLEUM CORP
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