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Vol.5 No.3 previous AA 72- 73-NT 60 -61 - 62

Academic Articles
Regular Paper Vol.5No.4 (2014) p.228 - p.237
 

Reliability Assessment for Thickness Inspection of Pipe Wall using Probability of Detection

 
Hiroyuki NAKAMOTO1*, Fumio KOJIMA1 and Sho KATO1
 
1Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, Hyogo 657-8501, Japan
 
Abstract
This paper proposes a reliability assessment method for pipe-wall thickness inspection using probability of detection (POD). Pipe-wall thicknesses are measured by certified inspectors with an ultrasonic thickness gauge. Since the inspectors have the different experiences and the frequency of inspections, the measured values are affected by the human factors of the inspectors and include some errors. In order to assess the reliability of inspection, first, the POD functions are determined based on the measured values of the pipe-wall thickness inspection. We verify that the results have the differences depending on five inspectors including two certified inspectors. Second, two human factors that affect the POD are indicated. Finally, it is confirmed that the POD can identify the human factors and assess the reliability for the pipe-wall thickness inspection.
 
Keywords
pipe-wall thickness inspection, reliability assessment, probability of detection, human factor
 
Full Paper: PDF EJAM Vol.5No.4 pp.228-237 "Reliability Assessment for Thickness Inspection of Pipe Wall using Probability of Detection"
















Article Information
Article history:
Received 11 October 2013
Accepted 27 January 2014