Eddy Current Inspection of Tubes

The Eddy Current non-destructive testing (NDT) method is used to inspect inside conductive materials without removing the non-conductive coatings such as paint.

Eddy Current involves observing changes in the flow of an electrical current through the material being tested. A change in the material such as a crack affects the flow of the induced current which allows the precise area affected to be determined.

Course Overview

Eddy Current Inspection of Tubes provides the theoretical knowledge and practical skills required to apply eddy current principles to the examination of tubing found in consenders, heat exchangers and air conditioning units.

The training and supporting examination is in accordance with BS EN ISO 9712 and covers the techniques of surface inspection and/or internal bore inspection.

Course Objectives

Delegates completing an Eddy Current Inspection of Tubes training course will be able to;

  • Detect corrosion, errosion, cracks, surface and near-surface defects in tubes
  • Write clear and concise inspection instructions and test reports
  • Meet the syllabus requirements of CSWIP/PCN Level 2 (depending on the training scheme selected)

Course Content

An Eddy Current Inspection of Tubes training course includes;

  1. Introduction
  2. Principles
  3. Equipment
  4. Practices
  5. AC theory
  6. Phase analysis
  7. Instrumentation
  8. Material sorting
  9. Crack detection
  10. Tube testing


In order to receive an Eddy Current Inspection of Tubes certificate, the minimum required duration of training is:

  • Level 1 - 40 hours
  • Level 2 - 40 hours (direct to level 2 - 80 hours)

The required duration of training is fulfilled by attending this training course.

In order to receive an Eddy Current Inspection of Tubes certificate, the minimum required duration of work experience is:

  • Level 1 - 3 months
  • Level 2 - 9 months (direct to level 2 - 12 months)

PLEASE NOTE: The examination may be taken before or after work experience is completed, however the certificate will not be issued until proof of experience is provided. After passing the examination, a results notice is issued and you then have 24 months to complete the required work experience.

PLEASE NOTE: This training is delivered on behalf of AIS Training by TWI Ltd staff at the TWI Ltd centre in Aberdeen. The training is available as part of the PCN or CSWIP scheme.