NDT.net - March 2000, Vol. 5 No. 03

Quantitative In-Service Inspection using the Alternating Current Field Measurement (ACFM) Method

Dr David A Topp
Technical Software Consultants Limited

NDTISS'99 - International Symposium on NDT Contribution to
the Infrastructure Safety Systems, 1999 NOV 22-26 Torres,
published by UFSM, Santa Maria, RS, Brazil



The ACFM Technique

Economics of Operation

Typical Applications

Advanced Inspection using Automated Process



  1. Collins R., Michael D.H. and Ranger K.B. 1981. The AC Field Around a Plane Semi Elliptical Crack in a Metal Plate. Proceedings of the 13th symposium on non-destructive evaluation, B.E. Leonard (ed) Non-Destructive Testing Information Centre, San Antonio, Texas, pp 470-479.
  2. Lugg MC., Lewis A.M., Michael D.H. and Collins R. 1988. The Non-Contacting ACFM Technique. Electromagnetic Inspection IOP Short Meetings, 12, Institute of Physics Publ, Bristol, UK pp 41-48.
  3. Raine G.A. 1999. The Alternating Current Field Measurement (ACFM) Crack Detection and Sizing Technique and its Application to In-Service Inspection. Presented at NDTMA Conference, Las Vegas, USA.
  4. Martins, M.V.M. and Marques F.C. R. T├ęcnica ACFM - Resultados Preliminares Promissores NA Petrobras. Presented at 17th Conaend Congress, August 1999.
  5. Laenen, C. 1999. The use of the ACFM Non-Destructive Testing Technique for the Inspection of Dockside Lifting Equipment. BINDT Seminar, Northampton UK.
  6. Raine G.A. 1996. ROV Weld Inspection - The Next Stage. Underwater Intervention Conference, New Orleans, Louisiana, USA.
  7. Topp, D.A., Burd J.F. and Lorenz M. 1996. Use of the ACFM Inspection Method to Reduce Downhole Drillstring Failures. OSEA96, Singapore.

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