| Method | Magnetic Flux is generated in the tube, and leakage from defect areas are detected.
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| Sensitivity | Excellent to O.D. Good to fair on I.D. defects.
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| Size Range | 2” (50mm) diameter and up.
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| disadvantages |
Spurious signals from welds and other magnetic anomalies. Poor
|
| Advantages | Fast, Dry. Moderately sensitive.
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| Cost | Moderate. Some consumables.
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| Operator Skill Level | Moderate
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