Pipeline transverse crack detection method

A technology for transverse cracks and detection methods, applied in measuring devices, instruments, and analysis of solids using sonic/ultrasonic/infrasonic waves, etc., can solve problems such as safety accidents, waste of manpower and material resources, and blasting, and achieve the effect of reducing the probability of misjudgment

Active Publication Date: 2021-08-17
国能锅炉压力容器检验有限公司 +1
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  • Abstract
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Problems solved by technology

Misjudgment will cause two serious consequences. One is that the inspection finds that the transverse crack is a false defect (not a real defect), and repair welding and heat treatment are required after excavation, which wastes manpower and material resources; If the crack defects are not detected, the pipeline will run with crack defects, blasting will occur, resulting in safety accidents

Method used

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  • Pipeline transverse crack detection method
  • Pipeline transverse crack detection method
  • Pipeline transverse crack detection method

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Embodiment Construction

[0053] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0054] The pipeline transverse crack detection method provided by the embodiment of the present invention specifically includes the steps of:

[0055] S01: Select the probe according to the probe K value:

[0056] Specifically, select a probe whose K value is less than x, where x is the probe K value when the primary wave is tangent to the inner wall of the pipeline. It can be understood that when the probe K value of the probe is x, the primary wave of the p...

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Abstract

The invention discloses a method for detecting transverse cracks in pipelines, which comprises the steps of: 1) selecting a probe whose K value is less than x, where x is the K value of the probe when the primary wave is tangent to the inner wall of the pipeline; 2) adopting the primary wave of the probe Detecting the pipeline; 3) If the first transverse crack defect is detected, it is determined that the first transverse crack defect exists. The pipeline transverse crack detection method disclosed in the present invention, by selecting the probe according to the K value of the probe, ensures that the ultrasonic waves emitted by the probe cover the pipeline during detection, thereby ensuring that the probe can detect various positions of the pipeline, and avoiding the occurrence of certain cracks in the pipeline. The position cannot be detected, thereby reducing the probability of misjudgment.

Description

technical field [0001] The invention relates to the technical field of pipeline detection, and more specifically, to a method for detecting transverse cracks in pipelines. Background technique [0002] In the project, it is necessary to conduct transverse crack detection on the raw materials and welds of important pipelines, for example, to perform transverse crack detection on the raw materials and welds of the four major pipelines (main steam pipeline, reheat steam pipeline, etc.) in the power plant. [0003] At present, there is no better method and reference standard for the detection of transverse cracks in pipelines, and misjudgment is more likely to occur. Misjudgment will cause two serious consequences. One is that the inspection finds that the transverse crack is a false defect (not a real defect), and repair welding and heat treatment are required after excavation, which wastes manpower and material resources; If the crack defects are not detected, the pipeline wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/04G01N29/24
CPCG01N29/04G01N29/24G01N2291/0289G01N2291/267
Inventor 张广兴张军武因芳张建耿雷史海营柳兴国
Owner 国能锅炉压力容器检验有限公司
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