Acoustic Emission Examination:Acoustic Emission Testing Organisation | |
TUV Austria - Your Efficient Testing Organisation
Due to many years of practical experience with acoustic emission (AE) we have reference projects in the following fields:
parallel AE during first pressure tests (also gas pressure tests) parallel AE during regular pressure tests with gaseous storing media or water leakage tests by AE in the course of pressure tests leakage tests by AE during normal operation
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In the field of extensive integrity examination TÜV Austria's experts have tested several hundred large pressure devices, such as
spherical and cylindrical natural gas tanks reactors in the chemical and petrochemical industry dry cylinders in paper plants reactors, filters and storage tanks in air-dissecting plants tanks for hydrogen, carbon and fluid gas hardening ovens sterilisation autoclaves excess pressure, operation and decompression chambers
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Furthermore, mass examinations of thousands of components were carried out, for example:
As the water pressure test has several disadvantages, the number of gas pressure tests has increased considerably in the last 20 years. Thanks to progress in the field of data processing (online demonstration of the test results) the examination of compressable media became possible. The main target of the parallel inspection by means of acoustic emission examination during the pressure test is to avoid possible failures of components and resulting disastrous damages.
In the field of leakage tests the most successful areas of application concern the following:
flat bottom tanks long-distance transport pipelines off-shore pipelines pipe systems in refineries and chemical plants pressure containers, such as heat exchangers
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Examination of Fluid Gas Tanks - Today's Challenge
Small fluid gas tanks with a maximal capacity of 2 t are usually subjected to the conventional water pressure test. This can lead to considerable problems immediately during the test or in the next period of operation. That is why TÜV Austria developed a special, patented testing method in the years 1991 and 1992. The increase in pressure is carried out with existing media in the container. Since the authorities accepted this testing method in 1993 we examine about 1.000 containers per yera. Apart from halving the costs per test this method also contributes to protecting the environment, as water is no longer polluted and there are no residual gases. Since 1997 testing bodies in France and Germany have been applying this method in cooperation with TÜV Austria.
