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Middlesbrough leads the way in track safety

Connect, no. 123, March/April 2003, p.6

The TSC Walking Stick ACFM equipment
The TSC Walking Stick ACFM equipment

TWI Technology Centre North East in Middlesbrough has recently run the first of a series of courses for Network Rail using Alternating Current Field Measurement (ACFM) inspection techniques. This course has recently been CSWIP approved and results in a CSWIP qualification for successful rail inspectors, a requirement for all major contractors working for Network Rail.

ACFM techniques were originally developed for use in underwater inspection and recently the petrochemical industry. TWI Training and Examination has developed a training and examination programme based on the CSWIP DocumentISO-NDT-93R, for the automated NDT inspection of rails. The CSWIP document may be found on the website at

ACFM Walking Stick technology is an advanced NDE tool designed to rapidly test rails for surface breaking defects and in particular Gauge Corner Cracking (GCC). Capabilities of the equipment include:

  • Real time automated defect identification
  • Automated defect sizing capability
  • Rapid scanning rate >1 mph
  • Electronic reporting

ACFM Walking Stick technology is a state-of-the-art development in non-destructive testing for rails. TWI is proud to play its part as a training provider for this innovative technology.

For more information, contact Jim Sheppard at the Technology Centre North East.

Note: ACFM is a registered trade mark of Technical Software Consultants Ltd, trading as TSC Inspection Systems.

For more information please email: