Fuel gas pipeline internal detection method

Abstract

The invention relates to a fuel gas pipeline internal detection method, which comprises the following steps of cleaning a pipeline buried in the ground, and cleaning impurities and foreign matters inthe pipeline; detecting pipeline deformation, and checking whether the pipeline is deformed or not; if the pipeline is deformed, further checking whether a deformation degree of the pipeline is largerthan a preset value or not; if the deformation degree of the pipeline is larger than the preset value, transforming the pipeline; if the deformation degree of the pipeline is smaller than the presetvalue, keeping the pipeline unchanged; carrying out corrosion detection on the pipeline, checking a corrosion situation of the pipeline, and forming corrosion data; if the corrosion situation of the pipeline exceeds a preset value, transforming the pipeline; if the corrosion situation of the pipeline is lower than a preset value, keeping the pipeline unchanged; storing data obtained through pipeline deformation detection and corrosion detection; and carrying out excavation verification, excavating soil from the ground, enabling the pipeline to expose outside, directly checking the pipeline, and carrying out data verification. The fuel gas pipeline internal detection method provided by the invention is convenient to operate, high in data detection accuracy, and favorable for the maintenanceof a natural gas pipeline.

Description

technical field [0001] The invention relates to a detection method in a gas pipeline. Background technique [0002] Internal inspection of high-pressure gas pipelines can clean up impurities inside the pipeline, eliminate hidden dangers in production, and conduct a comprehensive inspection of existing pipeline deformation, pipe wall or coating defects, internal and external corrosion of pipelines, weld defects and cracks, etc. It is conducive to accurate evaluation of pipeline operation status, and proactive repair of problems found in detection, reducing operational risks. Therefore, it is necessary to carry out internal inspection work on high-pressure and sub-high pressure natural gas pipelines. [0003] There are different types of impurities such as construction remnants, pipe wall oxidation and corrosion peelings, and dust impurities inside the pipeline. Long-term accumulation will increase pipeline friction, thereby increasing transportation energy consumption, and c...

AI Technical Summary

Problems solved by technology

[0003] There are different types of impurities such as construction remnants, pipe wall oxidation and corrosion peelings, and dust impurities inside the pipeline. Long-term accumulation will increase pipeline friction, thereby increasing transportation energy consumption, and causing great harm to pipelines and station process equipment. Seriously affect the efficiency and safety of pipeline transportation, which is not conducive to the safe and smooth operation of pipelines

There is currently no effective method for cleaning the interior of the pipe

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