Page 253 - CITS - Welder - Trade Theory

WELDER - CITS

5 Tube and Wire Testing
The automated eddy current test systems are developed for examining bars, tubes, and wires at a speed of 3 m/s.
After the operator calibrates the equipment by using a wire or tube with already known defects, the implemented
test runs automatically, defenestrating defective pieces from the production line or marking them with the help of
paint.

The actual eddy current test instrumentation can appear to be an insignificant part due to the mechanical handling
equipment for the test pieces that becomes complicated.

There is an increase in costs because of the facilities required for magnetic saturation and the demagnetization
of ferrous wires and tubes.

The continuous test speeds and differential coils enable the modulation of the test signals with speed, and then
it filters to remove the noise.
But sadly, when it comes to using differential coils, it becomes possible for the tubes (which comprise consistent
defects over their full length) to pass through the eddy current system without any detection.
Also, due to the edge effects, the tube ends cannot be identified. Moreover, the extrusion flaws along the Centre
of the bars cannot be identified because the eddy current field from an encircling coil remains at zero intensity,
which is at the center of a strong cylinder.
Purpose of Eddy Current Testing

Eddy Current Testing serves a critical role in the realms of material inspection and quality assurance.
This electromagnetic testing technique is specifically designed to detect flaws, defects, cracks, and other
irregularities in conductive materials without causing any damage to the tested object.

The primary purpose of ECT is to ensure the structural integrity and reliability of components across various
industries, including aerospace, automotive, manufacturing, and energy.
Advantages of Eddy Current Testing

In the world of Non-destructive Testing, Eddy Current Testing stands out as a versatile and powerful technique
used to inspect a wide range of conductive materials. There are many ECT companies.
Here are a few advantages.

1 High Sensitivity and Precision
Eddy Current Testing offers an unparalleled level of sensitivity, making it capable of detecting even the minutest
cracks or imperfections in conductive materials.

Its high precision ensures that potential issues are identified early, minimizing the risk of catastrophic failures.
2 Non-Destructive Nature
One of the most significant advantages of ECT is its non-destructive nature. Unlike some testing methods that
may cause damage during the inspection process, ECT allows for a thorough examination without altering the
material’s properties.
3 Rapid Inspection

Eddy Current Testing is known for its efficiency in rapidly assessing large volumes of materials.

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CITS : C G & M - Welder - Lesson 83 - 97