Technical note

Why does ultrasound not always correctly detect leaks in steam traps?

In steam networks, ultrasound is useful for certain scenarios, but in steam traps it can create false interpretations due to flash steam behavior during condensate discharge.

Technical context

When it works well and where it fails

Where it usually works

In compressed air and gas leak detection, ultrasound can be a very effective technology for predictive maintenance.

Limitation in steam traps

In steam traps, noise from flash steam during condensate discharge can be mistaken for a leak, increasing the risk of incorrect diagnostics.

Observed result

Difference between estimated and real leak rates

Ultrasound estimate 3%
Recorded real rate 27%

In field analyses reported by BiTherm, the discrepancy can be high if a steam-trap-specific validation methodology is not applied.

BiTherm recommendation

How to improve diagnostic reliability

Continuous monitoring

Track asset behavior 24/7, not just isolated measurements.

Process context

Analyze operating conditions to distinguish normal events from real leaks.

Technical prioritization

Prioritize interventions by operational and energy impact.

Post-action validation

Confirm outcomes after maintenance to close the continuous-improvement loop.

Next step

We can assess your network and estimate technical-economic impact

If you want, we can define an initial diagnosis with a methodology applicable to steam traps and steam network.