NDT.net - November 1998, Vol. 3 No. 11

Table of Contents ECNDT '98

Session: Reliability

Reliability of Mechanised UT Systems to Inspect Girth Welds during Pipeline Construction

R. van Agthoven, J.A. de Raad
Röntgen Technische Dienst bv, P.O. Box 10065, 3004 AB
telephone +31 10 2088208, fax +31 10 4158022
Corresponding Author Contact:
J.A. de Raad
Email: rtd@rtd.nl , URL: http://www.rtd.nl




Concept of RotoScan

Added Value of TOFD in RotoScan

Data Presentation and Storage

Cross Country Experience

Mechanised UT on Lay Barges

Defect Detection and Repair Rates

Calibration of Equipment

Procedures and Acceptance Criteria

Reliability Confirmation and Validation



  1. B. Gross, J. O'Beirne, B. Delanty, Comparison of radiographic and ultrasonic inspection methods on mechanized girth welds, Pipeline Technology Conference, Oostende, Belgium, October 1990.
  2. J.A. de Raad, Can Mechanized UT Replace RT on Girth Welds during Pipeline Construction? International Conference on Pipeline Reliability, Calgary, Alberta, Canada, June 2-5, 1992.
  3. J.A. de Raad, F.H. Dijkstra, Mechanized UT now can Replace RT on Girth Welds during Pipeline Construction, Second International Conference on Pipeline Technology, Oostende, Belgium, September 11-14, 1995.
  4. A.G. Glover e.a., Inspection and Assessment of Mechanized Pipeline Girth Welds, Proceedings of Weldtech 88, London, U.K., 1988.
  5. A. Glover, D. Hodgkinson, D. Dorling, The application of mechanized ultrasonic inspection and alternative acceptance criteria to pipeline girth welds, Pipeline Technology Conference, Oostende, Belgium, October 1990.
  6. J. van der Ent, F.H. Dijkstra, Evaluation of Ultrasonic Inspection Techniques for the Root Region of Girth Welds, RTD report for the American Gas Association, A.G.A. Project PR-220-9123, January 1996 (available at PRCI/A.G.A. for USD 500.00)
  7. Pending issue by AGA / PRCI
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