Remote field testing (RFT) is an electromagnetic method of non-destructive testing whose main application is finding defects in steel pipes and tubes. RFT may also be referred to as RFEC (remote field eddy current) or RFET (remote field eddy current technique). An RFET probe is moved through the pipeline and able to detect inside and outside defects with approximately equal sensitivity. The RFET technique works with conductive materials such as copper, brass, stainless steel, etc.
This RFET based device has been developed and manufactured by CORROCONT. It has an own windows based software to manage measured data and produce corrosion map and report.
The main difference between RFET and conventional ECT (eddy current testing) is in the coil-to-coil spacing. The RFET probe has widely spaced coils to pick up the through-transmission field. The typical ECT probe has coils or coil sets that create a field and measure the response within a small area, close to the area being tested.