NDT.net - October 1998, Vol.3 No.10

Table of Contents ECNDT '98

Session: NDT of Welds

Experiences and Problems of a Manual Ultrasonic Round - Robin Test

Ferenc Fücsök Eur. Ing.
ERÖKAR Co. Budapest, P.O. Box 67, 1601 Hungary

TABLE OF CONTENTS


Introduction

An ultrasonic RRT in Hungary

No Beginning of flaw
[mm]
Length of flaw
[mm]
y
[mm]
z
[mm]
FBH
[mm]
1 1,12 289,79 0,17 58,73 6,60
2 42,27 13,62 7,74 31,40 3,73
3 133,76 21,59 8,03 31,04 3,87
4 233,76 26,14 -2,10 31,36 4,23
5 325,40 44,76 -2,22 31,37 4,53
Table 1. The means of measured values

No Beginning of flaw
[mm]
Length of flaw
[mm]
y
[mm]
z
[mm]
FBH
[mm]
1 6,83 53,3 4,31 4,33 2,16
2 5,91 7,48 4,11 6,26 0,79
3 6,14 7,55 4,23 6,26 0,81
4 10,05 9,31 7,76 3,78 1,00
5 8,83 13,9 7,74 3,98 1,00
Table 2. The deviation of measured values

No Beginning of flaw [mm] Length of flaw [mm] y [mm] z[mm] Code Of Flaw
1




2 45 15
31,5 B 7.1
3 133 30
31,5 B 7.2
4 245 15
30 KB 7.1
5 343 30
30 KB 7.2
Table 3. The real size of the artificial flaws

The evaluation of RRT

Discussions and Suggestions

Acknowledgements

References

  1. Christina Nockemann, Chris Fortunko: Conclusion of the Workshop European-American Workshop Determination of Reliability and Validation Methods of NDE. June 18-20, 1997. Berlin, Germany, Proceedings (in printing)
  2. R. Murgatroyd, S. Crutzen: Human Reliability in Inspection Final report on Action 7 in the PISC III. Programme
  3. W. McEwan, N. Belavendram, M. Abou-Ali: Practical Guide to Statistical Process Control in NDT. The British Journal of NDT Vol. 34 No. 4. April 1992. 183-189 pp (f.14. t.5 r.4)
  4. C. Nockemann, G.-R. Tillack, H. Wessel, C. Hobbs, V. Konchina: Performance Demonstration in NDT by Statistical Methods: ROC and POD for Ultrasonic and Radiographic Testing. 6th ECNDT 1994. Nice, France. Proceedings 37-44 pp. (f.10. t.- r.10)
  5. Boiler and Pressure Vessel Code Section XI. Appendix VIII. Performance Demonstration for Ultrasonic Examination Systems 1992. pp 351-371.
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