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Re: thickness measurement of buried pipeline

Posted by: YSK on April 27, 2005 at 15:32:

In Reply to: Re: thickness measurement of buried pipeline posted by : Colin Brown , E-mail: colin.brown@twi.co.uk, on January 15, 2003 at 10:16 :

Paresh,
Long Range Ultrasonic can be used for screening the pipeline nonetheless it has been specified that LRUT can detect any changing in cross-section area of the pipe from 3% and above. However I have tried it though one company and the operator could not pick up pitting corrosion. Finally I find out that the operator was able to pick up 10% and above.
The other things if there is any attenuation the wave will die before it reaches to the specified distance

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----------- Start Original Message ----------- : Paresh, : Long Range Ultrasonic can be used for screening the pipeline nonetheless it has been specified that LRUT can detect any changing in cross-section area of the pipe from 3% and above. However I have tried it though one company and the operator could not pick up pitting corrosion. Finally I find out that the operator was able to pick up 10% and above. : The other things if there is any attenuation the wave will die before it reaches to the specified distance ------------ End Original Message ------------

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