State of the art of in-line nondestructive weld inspection of pipelines by ultrasonics

被引：0
|
作者：
G. Dobmann
O. A. Barbian
H. Willems
机构：
[1] Fraunhofer Institute for Non-destructive Testing (IZFP),
[2] NDT Systems and Services AG,undefined
来源：
Russian Journal of Nondestructive Testing | 2007年 / 43卷
关键词：
Nondestructive Test; Inspection Data; EMAT; Defect Depth; Girth Weld;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The in-line inspection of pipelines via the use of intelligent PIGs (pipeline inspection gages) that concerns the detection and sizing of metal loss (e.g., caused by corrosion) is a well-established technology for liquid pipelines as well as gas pipelines. Magnetic flux leakage and ultrasonic techniques are used for inspection. The application of conventional ultrasonic techniques is normally restricted to liquid lines because a liquid coupling medium is required. For reliable crack detection, only the ultrasonic technique has proven suitable. The cracking in pipelines is induced by fatigue crack growth and stress corrosion cracking in addition to manufacturing-related phenomena. The state of the art of in-line crack inspection is discussed, especially as regards typical examples of weld inspection. Special emphasis is placed on data evaluation and interpretation.
引用
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页码：755 / 761
页数：6
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