This is a method for inspection of non-ferromagnetic tubes in heat exchangers. The test is performed with a bobbin coil that produces an electromagnetic field in the tube. When the probe is pulled across a discontinuity, the electromagnetic field is distorted. This distortion in magnetic field changes the coil impedance that is related tot he discontinuity. For special defects or defects at special locations a rotating probe is used.

Defects that can be detected:

• wall loss
• pitting,
• cracking,
• 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.