🔵 Review of remote field testing (RFT): a new method to evaluate metal pipes 🔵

Introduction
Field testing technique Remote Field Testing (RFT) is a non-destructive and magnetic method used to detect defects in metallic materials with sufficient permeability to prevent significant penetration of eddy currents. This method is especially used for examining ferromagnetic pipes, because the usual techniques of eddy currents have difficulty in checking the full thickness of the pipe wall due to the strong shell effect in ferromagnetic materials. Applications
In this method, eddy currents are generated in the tested material, but especially in the area close to the excitation wires. However, the position of the receiving wires is far enough from the exciters that the effect of eddy currents is neglected. "Remote magnetic fields" are able to pass through the material being tested, and in penetrating the material, the magnetic field moves from the outer surface and the wires detect disturbances in the displaced current field relative to the original magnetic field. This method can be used quickly and cost-effectively to identify defects such as the loss of the inner and outer walls, such as corrosion, wear, rust, cracks, and failure. Applications and Equipment
Remote field testing is capable of inspecting any type of conductive pipe product and is particularly suitable for ferromagnetic metal materials such as low carbon steels, chromium molybdenum, duplex, etc. This method, using the 3D Push Pull High Speed Data Acquisition system by Zetec's professional software, provides the possibility of checking approximately 400 pipes per shift. br>- Prevent dangerous leaks
- Prevent hasty failures
- Accurate assessment of wall thickness loss down to 0.1mm
- Record measurement data, predict wall loss, predictive maintenance
- Quantitative method
- Identifying abnormalities of the materials used
- No need for water and clean surface like the IRIS method
- High sensitivity and more accurate measurement than other magnetic methods

### Conclusion
In general, the remote field testing method is an advanced and effective method to check the defects of metal pipes, especially in industries such as heat exchange, heating of feed water, furnace pipes in oil and gas equipment and equipment, Texas towers and Coolers are used with fin-fan tubes. The use of advanced equipment and experienced engineers use the advantages of this method to prevent risks and maintain optimal performance

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