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EJAM2-1AA_SP1_"Monitoring System for Pipe Wall Thinning Management using Electromagnetic Acoustic Transducer" written by D. KOSAKA, et.al.
 
Vol.1 No.4 previous GA 11 - 12 - AA SP1 (11 - 12 - 13 - 14) - NT 19 - 20 - 21 - 22 next Vol.2 No.2
Academic Articles
Invited Paper Vol.2 (2010) p.34 - p.42
Special Issue 1: "The Technology of Pipe-wall-thinning Management"
 

Monitoring System for Pipe Wall Thinning Management using Electromagnetic Acoustic Transducer

 
Daigo KOSAKA1, Fumio KOJIMA2,Hiroshi YAMAGUCHI2, and Kosuke UMETANI3
 
1Graduate School of Engineering, Kobe University, 1-1 Rokkodai-cho, Nada-ku,Kobe 657-8501, Japan
2Organization of Advanced Science and Technology, Kobe University, 1-1 Rokkodai-cho, Nada-ku,Kobe 657-8501, Japan
3Graduate School of System Informatics, Kobe University, 1-1 Rokkodai-cho, Nada-ku,Kobe 657-8501, Japan.
 
Abstract
This paper demonstrates the effectiveness and feasibility of monitoring system for pipe wall thinning using electromagnetic acoustic transducer (EMAT). The proposed EMAT system provides no contact, high resolution measurement, and remote capability of inspection procedures. First, a simulation based analysis is performed to study the measurement sensitivities with respect to pipe wall thinning. Secondly, taking into account that FAC damage is extended into the downstream of orifice, verification tests are implemented based on thickness measurements at grid points on the outer surface of pipe. Various type of test pipes with FAC damage model were provided for our laboratory experiments. Finally, the validity and the feasibility of our proposed method are demonstrated through the practical test at the real plant.
 
Keywords
nondestructive test, condition monitoring, on-line monitoring, flow accelerated corrosion, cavitation and erosion
 
Full Text: PDF
 
(Received: April 25th, 2010)