Eddy Current Method
This method is commonly used for the inspection of non-ferromagnetic tubes in heat exchangers. The inspection is done with a bobbin coil, the coil produces an electromagnetic field in the tube. When the probe is pulled along a discontinuity, the electromagnetic field is distorted. This distortion in the electromagnetic field changes the coil impedance related to the discontinuity. For special defects or defects inside tube sheets a rotating probe is used.
Detectable defects:
- Wall thickness reduction
- Local pitting
- Cracks
- Erosion/corrosion
- Baffle hammering
Inspection techniques:
internal coaxial probe, rotating probe
JSC Inspections – we offer Non-Destructive Testing and Inspection Services for clients in the oil-, gas- and petrochemical industries, the chemical industry, the energy sector and the construction of pipelines and structures industry.
