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Rapid Long range Inspection of Chemical Plant Pipework Using Guided Waves

D.N. Alleyne, B. Pavlakovic,
Guided Ultrasonics Ltd, 17 Doverbeck Close, Nottingham, NG15 9ER, UK
M.J.S. Lowe, P. Cawley
Dept Mechanical Engineering, Imperial College, Exhibition Road, London, SW7 2BX, UK
Contact

Summary

1. Introduction

2. Sensitivity and identification of non-axisymmetric features

3. Commercial Implementation

4. Testing pipes with attenuative coatings

5. Conclusions

References

  1. Silk, M. G., and Bainton, K. F. 'The propagation in metal tubing of ultrasonic wave modes equivalent to Lamb waves,' Ultrasonics, Vol 17, pp11-19, 1979.
  2. Böttger, W., Schneider, H., and Weingarten, W. 'Prototype EMAT system for tube inspection with guided ultrasonic waves,' Nuclear Eng. and Design, Vol 102, pp356-376, 1987.
  3. Rose, J.L., Ditri, J.J., Pilarski, A., Rajana, K. and Carr, F.T. 'A guided wave inspection technique for nuclear steam generator tubing', NDT & E International, Vol 27, pp307-330, 1994.
  4. Mohr, W. and Höller, P. 'On inspection of thin walled tubes for transverse and longitudinal flaws by guided ultrasonic waves', IEEE Trans Sonics and Ultrasonics, Vol SU-23, pp369-374, 1976.
  5. Alleyne, D.N. and Cawley, P. 'Long range propagation of Lamb waves in chemical plant pipework', Materials Evaluation, Vol 55, pp504-508, 1997.
  6. Alleyne, D.N. and Cawley, P. 'The excitation of Lamb waves in pipes using dry coupled piezoelectric transducers', J NDE, Vol 15, pp11-20, 1996.
  7. Alleyne, D.N., Cawley, P., Lank, A.M. and Mudge, P.J. 'The Lamb Wave Inspection of Chemical Plant Pipework', Review of Progress in Quantitative NDE, Vol 16, DO Thompson and DE Chimenti (eds), Plenum Press, New York, pp1269-1276, 1997.
  8. Alleyne, D.N., Lowe, M.J.S. and Cawley, P. 'The reflection of guided waves from circumferential notches in pipes', ASME J Applied Mechanics, Vol 65, pp635-641, 1998.
  9. Lowe, M.J.S., Alleyne, D.N. and Cawley, P. 'The mode conversion of a guided wave by a part-circumferential notch in a pipe', ASME J Applied Mechanics, Vol 65, pp649-656, 1998.
  10. Alleyne, D.N. and Cawley, P. 'Optimisation of Lamb wave inspection techniques', NDT&E International, Vol 25, pp11-22, 1992.

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