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Comprehensive judgment method for buried gas metal pipeline corrosion caused by stray current nearby subway lines

A stray current and gas pipeline technology, which is applied in weather resistance/light resistance/corrosion resistance, measuring devices, instruments, etc., can solve difficult problems such as analysis of abnormal corrosion and leakage of pipelines

Inactive Publication Date: 2017-10-20
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no systematic comprehensive failure analysis and determination method for the corrosion of buried metal pipelines caused by stray currents near such subway lines at home and abroad, and it is difficult to accurately analyze the abnormal corrosion leakage of pipelines

Method used

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  • Comprehensive judgment method for buried gas metal pipeline corrosion caused by stray current nearby subway lines
  • Comprehensive judgment method for buried gas metal pipeline corrosion caused by stray current nearby subway lines
  • Comprehensive judgment method for buried gas metal pipeline corrosion caused by stray current nearby subway lines

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Embodiment １

[0072] Embodiment 1: The specific steps are as follows:

[0073] (1) Sorting and analysis of the background overview, including sorting and analysis of the geographical location of the pipeline, surrounding building facilities, design structure, operating conditions, stray current distribution, etc., to determine the background overview of the corrosion leakage failure of the pipeline, the main content include:

[0074] ①The geographical location of the pipeline includes the exact position and naming of the pipeline, the engineering number of the design drawing, the distribution of surrounding rivers and lakes, geological conditions, and relative depth, etc. figure 1 (a) shows the schematic diagram of the location of the pipeline. This section of the pipeline is located below Gonghexin Road, Zhabei District, Shanghai. As a gas transmission and distribution pipeline, its main function is to transport gas to the pressure regulating station, and then supply it after pressure regu...

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Abstract

The invention discloses a comprehensive judgment method for buried gas metal pipeline corrosion caused by stray current nearby subway lines. The method comprises steps as follows: 1, arrangement and analysis of background and general situation: technological parameters, past operation conditions and the like of a pipeline are known; 2, inspection and test analysis: after a faulted pipeline with abnormal leakage is sampled, the sample is subjected to check analysis with various devices and multiple physical and chemical test means; 3, comprehensive discussion, analysis and judgment: an acting form of the stray current on pipeline corrosion morphology is judged, a mutual relation between failure mechanisms is discussed, a failure reason is found out and a solution is given. By means of comprehensive analysis for corrosion failure, caused by the stray current nearby the subway lines, of the buried gas metal pipeline, new stray current corrosion morphology feature reference and failure mechanism theoretical support are provided, the failure reason of the pipeline can be accurately judged, and an effective solution is proposed. The method has great reference significance and practical application value for failure analysis of various oil and gas transmission pipelines and pipelines with different diameters, model and textures in different environments.

Description

technical field [0001] The invention belongs to the technical field of safety detection of urban buried pipeline networks, and in particular relates to a comprehensive determination method for corrosion of buried metal gas pipelines caused by stray currents near subway lines. Background technique [0002] As the problems of global energy consumption and environmental pollution have become increasingly prominent in recent years, my country is constantly adjusting its energy structure, and clean gas energy, mainly natural gas, has received more and more attention and application. As an important carrier of gas transportation, buried gas pipelines not only have an important strategic position in my country's economic development, but also are the lifeline to ensure the normal operation of cities, which is of great significance to regional economic development. However, with the acceleration of urbanization, urban buried gas pipelines are adversely affected by subway and other r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/02
CPCG01N17/02
Inventor 杨振国毕彤彤陆伯忠杨争战
Owner FUDAN UNIV
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