Mastering the art of crack detection and sizing

Following the successful training of several more Level 1 and Level 2 operators in late July- early August, Russell Fraser Sales has reported a spike in the number of NDT companies ordering Alternating Current Field Measurement (ACFM) equipment.

According to the company, TSC’s state-of-the-art technology offers efficient and accurate results in the detection and sizing of surface breaking cracks.

ACFM is a specialised electromagnetic inspection technique which provides accurate data on a defect’s location and length.

The significance of a defect, in terms of structural integrity, generally depends on the depth of the defect, the company says. Using mathematical models, the system provides the depth of the defect, thus allowing an immediate evaluation of the significance of the indication.

The AMIGO Crack Microgauge system offers rapid scanning using a hand-held probe and reliable crack detection and sizing (length and depth).

A dual frequency option is available with 5kHz (for ferritic steel) and 50kHz (for improved sensitivity on non-ferrous metals).

The AMIGO can operate for at least 5 hours on one fully-charged battery pack. Full data storage of scans facilitates back-up, off-line view, audit purposes and reports.

With ACFM there is reportedly no need to clean the inspection area to bare metal. The AMIGO is capable of inspection through thin metallic coatings, or through non-conducting coatings several millimetres thick. A wide range of geometries is available with TSC’s active topside probes.

RFS will be running further training courses certified by Lloyds Register to Recommended Practice SNT-TC-1A later this year. To register, contact RFS.