What is Eddy Current Testing in SS Pipe Manufacturing

  • By:Bonnie Auyeung
  • Date:2023/07/21

In order to make the pipeline production more professional, we usually carry out some tests, so what is the eddy current flaw detection test?

Eddy-current testing (also commonly seen as eddy current testing and ECT) is one of many electromagnetic testing methods used in nondestructive testing (NDT) making use of electromagnetic induction to detect and characterize surface and sub-surface flaws in conductive materials.


Common applications of eddy current detection are pipeline checks in heat exchangers and condensers.


ECT uses electromagnetic induction to identify defects in the pipeline. Place the probe into the tube and pass through the tube. The eddy currents are generated by the electromagnetic coil in the probe and are monitored simultaneously by measuring the probe electrical impedance.

Eddy current tube detection is a non-destructive method for finding pipe defects that is effective for many different pipe materials and can detect defects that may cause greater problems for heat exchangers and condensers.

Several types of defects in the pipe can be detected using an eddy current detection method: 

1.Internal diameter (ID) and outer diameter (OD) pitting


3.Wear (from supporting structures, other pipes and loose parts)

4.Outer diameter and inner diameter erosion




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