NDT.net - August 2000, Vol. 5 No. 08

X-Ray Testing of Circumferential Welds by a Mechanized radiometric Weld Inspection System

B. Redmer, U. Ewert
BAM-Berlin / VIII.31
Unter den Eichen 87, 12205 Berlin, Germany

B. Neundorf
Hamburgische Electricitäts-Werke AG
Überseering 12, 22297 Hamburg, Germany

J. Müller
Compra - Gesellschaft für Qualitätssicherung und Umweltschutz mbH
Johannisstr. 20, 52226 Frechen, Germany

Corresponding Author Contact:
Email: bernhard.redmer@bam.de

2nd International Conference on NDE in Relation to Structural Integrity for Nuclear and Pressurized Components, New Orleans May 2000.
TABLE OF CONTENTS


Introduction

Principle

Methods of depth evaluation

Laminography as a 3D-method

Planar Tomography for 2D-reconstruction (Cross section reconstruction)

Fig 5: Principle of planar tomography. The X-ray tube is shifted alog the surface parallel to the pipe axis and several hundred projections are taken for reconstruction. Fig 6: Reconstructed profile of a circumferential weld of an austenitic pipe after oscillation

Determination of wall thickness

Results and Conclusions

References

  1. U. Ewert, B. Redmer, J. Müller: "Neue Möglichkeiten rechnergestützter Durchstrahlungstechniken für die Schweißnahtprüfung"; Jahrestagung der DGZfP, Bamberg, 7.-9. September 1998, Berichtsband 63.1, S.283-300
  2. B. Redmer, Y. Onel, U. Ewert, H. Diener, J. Müller: "Automatisierte Schweißnahtprüfung auf der Basis eines Zeilenscanners", Jahrestagung der DGZfP, Dresden, 5.-7. Mai, 1997, S. 769-776.
  3. R. T . Bernadi: "Steel weld inspection with digital radiographic line scanning", ASNT 1993 Spring Conference, 29.3.-2.4.93, Nashville, TN, USA, pp.78-80.
  4. C. R. Smith. J. W. Erker: "Low cost, high resolution X-ray detector system for digital radiography and computer tomography", SPIE's 1993 International Symposium on Optics, Imaging and Instrumentation, 11.7.-16.7.93, San Diego, CA, USA.
  5. H.-P. Weise, P. Jost, W. Freundt: "Quantum yield, Photon numbers by conference proceedings"; Jahrestagung der DGZfP, Mainz, 24.-26. März 1978, Berichtsband, S.553 ff.
  6. U. Ewert, J. Robbel, C. Bellon, A. Schumm, C. Nockemann: "Digital Laminography", Materialforschung, 37 (1995), H.6, S.218-222.
  7. U. Ewert, B. Redmer, J. Müller, M. Trobitz, V. Baranov: "Mechanized Radiation testing of Austenic Pipe Welds"; 24. MPA-Seminar, Stuttgart 1998, Vol. 1, pp. 13.1-13.4
  8. B. Redmer, U. Ewert, Y. Onel, J. Müller, H. Diener, M. Walkmann, V. Baranov: "Automated radiometric weld inspection in nuclear power industry by tomosynthesis"; Computer Methods and Inverse problems in Nondestructive Testing and Diagnostics (CM NDT-98), Minsk 1998, pp. 441-448
  9. S. Zolotarev, V. Vengrinovitch, G.-R. Tillack: "Finite series expansion method modified for multi-step reconstruction from limited number of projections and views"; Computer Methods and Inverse Problems in Nondestructive Testing and Diagnostics (CM NDT-98), Minsk 1998, pp.185-192.

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