Acoustic Emission Testing (AET) is a passive, whole-structure monitoring method. TechCorr attaches sensors to a vessel or tank and listens for the high-frequency stress waves that active defects — cracking, corrosion, and leaks — emit under load. It is the only method that tells you whether a known flaw is actively growing.
What is Acoustic Emission Testing?
When a crack grows, corrosion flakes, or a leak opens, the material releases a burst of acoustic energy. AET sensors capture those bursts, and analysis locates and characterizes the source. Because AET monitors the whole structure at once, it is ideal for finding the few active defects among many known indications.
When should I use AET?
AET is most valuable during proof testing (to confirm a vessel is sound before return to service), during in-service monitoring of known flaws (to confirm they are dormant), and for leak detection in tanks and buried piping. It supports ASME and API 510 vessel inspection programs and is a core Online Monitoring technique.
Can AET inspect assets that are in service?
Yes. AET is performed while the asset is under normal or slightly elevated load, so it does not require isolation. For vessels with known but dormant flaws, AET confirms dormancy and defers repair — a major cost saver in Asset Integrity Management.
How accurate is AET?
AET locates active sources to within a sensor spacing and characterizes them by severity. It does not size flaws; it confirms activity. Flagged areas are confirmed with PAUT or conventional UT before decisions are made.
What credentials back TechCorr's AET?
AET is performed by ASNT Level II/III technicians with acoustic-emission method certification, supervised by API 510-certified inspectors. Contact us to scope an AET monitoring program.