Flux Leakage Testing Technique
A Division of InspecTech Analygas Group Inc.
450 Midwest Road, Toronto, Ontario, Canada, M1P 3A9
Tel: 416-757-1179      Fax: 416-757-8096
Email: group@inspectech.ca    Web: www.inspectech.ca


Magnetize the tube under test and locate magnetic flux ‘leakage’ from the surface as a result of a defect.


Weld (not DSA) testing on-line, and full body testing off-line.  Full body testing only

possible on annealed product.


All magnetic products, almost no size limits.


High speed testing.  Good sensitivity to both ID and OD defects.  Sensitive to continuous defects.  Non-contact or minimal  contact with product.  InspecTech has refined the technique to test small diameter ERW welds on line.


In larger, heavy wall products huge magnetizing forces are created resulting in very

large machines for full body testing.  Interfering signals for ERW welds can limit full

body capability.