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SGS is offering an acoustic emission testing (AET) package, which allows users to locate structural defects and to monitor the material for discontinuities.

Defects and discontinuities in a material must be detected before they reach a critical size and result in severe damage and expensive corrective actions, according to the company.

Acoustic emission (AE) occurs naturally where external stimuli, such as deformations, corrosion and cracks in a material under stress, generate sound waves.

AET is an advanced non-destructive-testing (NDT) method that is used to analyse the sound waves emitted, caused by defects or discontinuities in material.

Several sensors are attached to the surface of the material, spaced at intervals of a number of metres apart.

The information collected by each of the sensors is monitored by a computer.

If there is a defect in the material, the signal characteristics of the sensor attached near the discontinuity alters.

Information about the origin and severity of a defect in the material can be ascertained by analysing these signals.

AET is said to provide an increase in sensitivity compared to conventional testing methods and the testing time is shorter than with other NDT methods.

SGS’s AET service is packaged according to the customer’s assets and production processes and can be utilised whenever it is required and found efficient.

The company is also offering AET combined with other NDT methods, ranging from standard to advanced NDT services.

SGS SA – Industrial Services

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