Alternating current field measurement (ACFM): A new technique for the NDT of process plant and piping components
- Technical Software Consultants Limited, Wolverton Mill (United Kingdom)
- Memorial Univ., St. John`s, Newfoundland (Canada). Faculty of Engineering and Applied Science
This paper describes a new electromagnetic-based NDT technology that is suitable for inspecting process plant and pipework fabricated from some of the more advanced materials, in addition to the traditional carbon steels. The name given to this new NDT technique is Alternating Current Field Measurement, or ACFM. ACFM is an extremely versatile NDT tool with a wide range of practical applications. A major advantage of ACFM over conventional NDT systems is that no calibration is required; crack detection and sizing is based on a theoretical interpretation of the measured signals. The technique is non-contacting and can be used on a wide range of electrically conductive materials (e.g., carbon steel, stainless steel, duplex steel, monel, inconel, aluminum, nickel, titanium, carbon reinforced plastics) without the need for extensive surface cleaning or removal of protective coatings. The flaws may be surface, sub-surface or remote face, depending on the material, and the probes can be designed to suppress signals from features that are not cracks (e.g., corrosion, undercuts, heat-affected zones, etc.), thus overcoming many of the problems associated with other electromagnetic systems and minimizing the probability of spurious indications.
- OSTI ID:
- 418168
- Report Number(s):
- CONF-960706-; ISBN 0-7918-1769-5; TRN: 97:002019
- Resource Relation:
- Conference: American Society of Mechanical Engineers (ASME) pressure vessels and piping conference, Montreal (Canada), 21-26 Jul 1996; Other Information: PBD: 1996; Related Information: Is Part Of NDE engineering codes and standards and materials characterization. PVP-Volume 322; NDE-Volume 15; Cook, J.F. Sr. [ed.] [Idaho National Engineering Lab., Idaho Falls, ID (United States)]; Cowfer, D.C. [ed.] [Savannah River Lab., Aiken, SC (United States)]; Monahan, C.C. [ed.] [Memorial Univ. of Newfoundland, St. John`s, Newfoundland (Canada)]; PB: 100 p.
- Country of Publication:
- United States
- Language:
- English
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