The paper discussed pipeline inner-outer defects inspection and identification methods in pipeline magnetic flux leakage (MFL) inspection. Inspection vehicle got across defects in some velocity, bringing residual MFL, its signal frequency and peak value depend on defects size, defects shape, defects in inner or outer, inspected by Hall element sensors. The experimental results indicated that some pipeline defects can be found by former sensors and back sensors and its inner-outer position, other defects still can't be found. The MFL signals obtained depend not only on the detector and the defect but also on running conditions, such as the tester's velocity and stress, life-off and so on. Thus, more study need be finished.
Inspection and identification of inner-outer defects on oil-gas pipeline
Prüfung und Identifizierung von inneren-äußeren Fehlern an Öl-Gas-Pipelines
2008
4 Seiten, 7 Bilder, 6 Quellen
(nicht paginiert)
Conference paper
Storage medium
English
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