Are you looking for Eddy Current Testing - Eiwaa Group

Eiwaa Group of  Eddy Current Testing system was specially developed for quality testing and process monitoring of long products. From hot testing to all bright steel processing steps, the surfaces of semi-finished products made from austenitic, (non) ferromagnetic metals can be tested for defects. The system operates in a contactless and non-destructive manner in accordance with the Eddy Current Testing method and is used for detecting short defects, such as holes or localized defects and transverse defects. 

The systems detect defective materials fully automatically and reliably. Defects can be marked, classified, and automatically discarded. The test speed of up to 150 m/s facilitates 100% testing, even at high production speeds. The systems benefit from low operating costs and frugal energy consumption as well as low maintenance costs, few wear parts, and low use of materials.

Eddy Current Testing: 

It is based on the principle of generating circular electric currents called eddy currents in a conductive material. The coils are connected to the AC generator or a magnetic field (Primary field).The indicators show the discontinuities that change the path of the induced currents.

Applications

1.Eddy Current Testing  used to detect the discontinuities on the surface and subsurface of the metals that we need to test with this technique we can also measure the non-metallic plate coating, hardness of the metal, thickness of metals and sheets.

2.This is widely used for heat exchangers and tube inspections.

Advantages

1.The test is conducted instantaneously and it is faster than other methods once the procedure is set up.

2.The equipment is portable and easy to handle.

3. Eddy Current inspection is one of several NDT methods using the principle of electromagnetism to conduct examinations. 

Best Eddy Current Testing 

In eddy current testing, a coil carrying an AC current is placed close to the specimen surface, or around the specimen. The current in the coil generates circulating eddy currents in the specimen close to the surface and these in turn affect the current in the coil by mutual induction. Flaws and material variations in the specimen affect the strength of the eddy currents.

 

The presence of flaws etc is therefore measured by electrical changes in the exciting coil. Both voltage and phase changes can be measured, but some simpler instruments measure only the voltage changes.

The strength of the eddy currents produced depends on the:

a) electrical conductivity of the specimen;

b) magnetic permeability (for a ferromagnetic specimen);

c) stand-off distance between the specimen and coil;

d) AC frequency used in the exciting coil;

e) dimensions of the coil and specimen;

as well as the presence of flaws, and much of the success of Eddy current testing depends on separating the effects of these variables. Most eddy current instruments require calibration on a set of test specimens and the flaw sensitivity can be very high.

Equipment varies from simple portable meter read-out instruments to more complex oscilloscope read-out displaying both phase and voltage; recently the outputs have been digitised to produce fully-automated computer-programmed equipment with monitored outputs for high-speed testing.

Applications vary from crack detection, to the rapid sorting of small components for either flaws, size variations or material variation. Many applications are bar, tube and wire testing. Metal sorting is also a common application of eddy current testing.

For more details visit our website: Eddy Current Testing 

Contact: +9715650 35752

Address: P.O. Box : 28346,  Abu dhabi, UAE

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