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Gas leakage detecting method of natural gas pipeline

A technology of natural gas pipeline and detection method, which is applied in the field of natural gas flow measurement, can solve the problems of pollution, rupture accident rate, easy cracking of pipelines, etc.

Inactive Publication Date: 2019-02-01
四川川油工程技术勘察设计有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Generally speaking, leakage accidents are relatively low in the mid-term, but with the later stage of pipeline operation, due to the aging, corrosion, and wear of pipelines and equipment, pipelines are more prone to cracks and even ruptures, resulting in an increase in the accident rate.
The existing bubble method will cause pollution and is not conducive to long-term real-time detection

Method used

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  • Gas leakage detecting method of natural gas pipeline

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 1 Shown, a kind of gas pipeline leakage detection method comprises the following steps:

[0028] (1) Evaluate the leak-prone part of the natural gas pipeline in the later stage of operation;

[0029] (2) Install an air leakage detection device on the leak-prone part;

[0030] (3), if the air leakage is detected by the air leakage detection device, then repair at the air leakage; If the difference is 0, there is no need to perform leak detection. If the difference is greater than 0, rebuild the air leakage device and select other parts for detection.

[0031] The air leakage detection device includes a cavity 2 that can be sleeved outside the pipeline. The cavity 2 is connected to a transmission tube 3. The outlet of the transmission tube 3 is provided with a cavity 4 filled with liquid. The cavity 4 is located on the side of the transmission tube 3 , the outlet end is submerged under the liquid surface, a gas discharge pipe 4 is arranged in the chamber...

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Abstract

The invention discloses a gas leakage detecting method of a natural gas pipeline. The gas leakage detecting method comprises the following steps: (1), a liable-leaking part of the natural gas pipelineduring operating in the later period is evaluated; (2), a gas leakage detecting device is mounted on the liable-leaking part; and (3), if gas leakage is detected through the gas leakage detecting device, the gas leakage position is maintained, if gas leakage is not detected, the difference value between the natural gas introduction initial amount and the outlet amount of the position is calculated, if the difference value is zero, leakage detection is not needed, if the difference value is larger than zero, a gas leakage device is set up again, and other parts are selected to be detected. Whether the pipeline leaks gas or not can be accurately detected.

Description

technical field [0001] The invention relates to the technical field of natural gas flow measurement, in particular to a gas leakage detection method of a natural gas pipeline. Background technique [0002] Natural gas is a mixture dominated by hydrocarbons. Hydrocarbons in natural gas include methane, ethane, propane, butane, pentane, and hexane. In addition to hydrocarbons, it also contains carbon dioxide. [0003] Natural gas is flammable, explosive, and easy to spread. Leakage and rupture accidents of natural gas pipelines not only cause great direct economic losses, but also easily cause serious consequences such as personal injury and environmental pollution. Therefore, it is very important to carry out real-time online monitoring of natural gas pipeline leakage, find leakage and prevent hidden dangers in time. [0004] Generally speaking, leakage accidents are relatively low in the mid-term, but with the later stage of pipeline operation, due to the aging, corrosion,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F17D5/02F17D5/00G01M3/28
CPCF17D5/02F17D5/005G01M3/2807
Inventor 陈康黄玲曾道贵
Owner 四川川油工程技术勘察设计有限公司