What’s Prove-Up, and Why Does It Matter? 

Prove-up is the process of confirming Magnetic Flux Leakage (MFL) findings with a more precise tool, often Ultrasonic Testing (UT) or a pit gauge. While MFL can detect metal loss areas, it doesn’t always give exact depth measurements, which can affect decisions about repairs. Prove-up allows inspectors to confirm the severity of these anomalies, ensuring attention is focused to the right regions. But proving up every MFL signal can be impractical, costly, and time-consuming. This is why a focused prove-up approach that targets only critical areas is essential. It helps inspectors efficiently identify high-risk zones, keeping inspections efficient and effective.