Method for evaluating bonding quality of pipeline repairing mouth heat shrinkage band through ultrasonic nondestructive detection
A heat-shrinkable tape and bonding quality technology, which is applied in the direction of using sound waves/ultrasonic waves/infrasonic waves to analyze solids, etc., can solve the problems of less heat-shrinkable tapes for pipe joints and no public reports, and achieve the effect of improving the construction quality of joints
Active Publication Date: 2015-02-25
PIPECHINA SOUTH CHINA CO
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Problems solved by technology
At present, there have been some research results on the bonding structure, but most of them are still in the laboratory research stage, and there are very few researches on the ultrasonic testing of the bonding quality of the heat shrinkable tape for pipe jointing, and there is no public report yet.
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[0054] This embodiment is used to illustrate the specific implementation of the present invention, and to further describe the content of the invention.
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The invention relates to a method for evaluating the bonding quality of a pipeline repairing mouth heat shrinkage band or other bonding structures similar to a heat shrinkage band-steel tube structure through ultrasonic nondestructive detection. The method is characterized in that a water-immersed ultrasonic pulse echo technology is used to detect a pipeline repairing mouth, and comprises the following steps: 1) obtaining a detection signal; 2) selecting a time window and a frequency band range; 3) calculating an average power and low frequency energy; 4) fitting an evaluation curve, and determining an evaluation threshold; and 5) carrying out qualitative and semi-quantitative evaluation of the bonding quality. The method improves the evaluation efficiency of the bonding quality and promotes the improvement of the mouth repairing quality.
Description
technical field [0001] The invention relates to an ultrasonic non-destructive testing evaluation of the bonding quality of the heat shrinkable tape for pipe jointing, which is applied to the evaluation of the bonding quality of the heat shrinkable tape for pipe jointing or the bonding quality evaluation of other bonding structures similar to the heat shrinkable tape-steel pipe structure The method relates to the measurement of ultrasonic waves, the general corrosion protection of metal materials and the technical fields of pipeline systems. Background technique [0002] Pipe joint jointing is an anti-corrosion operation at the weld of two sections of pipelines. In the construction process of buried steel pipelines, pipeline repairing is an important process to ensure the integrity of pipeline anticorrosion, and it is also a key link to ensure the quality of the external anticorrosion layer of the entire pipeline. At present, almost all domestic 3PE anti-corrosion pipelines ...
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Inventor 王维斌韩赞东康叶伟陈新华刘玲莉王禹钦林明春徐华天郭正虹赵君陈振华
Owner PIPECHINA SOUTH CHINA CO