Pulsed Eddy Current (PEC) is TechCorr's go-to method for screening corrosion under insulation (CUI) and corrosion under fireproofing (CUF) without stripping insulation or coatings. It measures remaining wall from the outside, through inches of insulation, concrete, or marine growth.
What is Pulsed Eddy Current?
PEC sends a pulsed magnetic field into the asset. Eddy currents form in the steel and decay over time; the decay rate is proportional to wall thickness. Because the field penetrates insulation and coatings, PEC reads remaining wall without removing them — a major cost and time saver on insulated vessels and pipelines.
Where is PEC most valuable?
The highest-value PEC applications are insulated vessels and piping in CUI service, fireproofed structural steel, and subsea or splash-zone assets with marine growth. PEC screens the entire surface and flags the spots where insulation removal and conventional UT are actually needed. Pair it with our Asset Integrity Management program to turn screening data into a corrosion-rate plan.
How accurate is PEC?
PEC reports an average remaining wall over the footprint of the probe — not a point measurement. It is a screening tool; flagged areas are confirmed with conventional UT before retirement decisions. Used this way it supports NACE and API 510/570 inspection planning.
Can PEC inspect assets that are in service?
Yes. PEC works through most operating temperatures and product, so vessels and lines stay running. This makes it a core Online Monitoring technique for hard-to-isolate assets.
What credentials back TechCorr's PEC?
PEC is performed by ASNT Level II/III technicians with eddy-current method certification, supervised by API 510/570-certified inspectors. Request a quote to scope a CUI screening campaign.