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Technical Discussions
Bijay Muduli
Engineering
IOCL, India, Joined Jul 2003, 4

Bijay Muduli

Engineering
IOCL,
India,
Joined Jul 2003
4
08:40 Oct-10-2003
Ultrasonics for Cement Lining

1) Is there any Ultrasonic technique to measure lining/ coating thickness on steel pipes?

2) Can dual probes help in this regard?

Your valuable replies shall be appreciated.

Regards



    
 
 
Todd Allen
Consultant, Ground Penetrating Radar ( GPR )
Radarview Concrete and Underground 3D Imaging, USA, Joined Jan 2003, 7

Todd Allen

Consultant, Ground Penetrating Radar ( GPR )
Radarview Concrete and Underground 3D Imaging,
USA,
Joined Jan 2003
7
01:41 Oct-13-2003
Re: Ultrasonics for Cement Lining
----------- Start Original Message -----------
: 1) Is there any Ultrasonic technique to measure lining/ coating thickness on steel pipes?
: 2) Can dual probes help in this regard?
: Your valuable replies shall be appreciated.
: Regards
------------ End Original Message ------------

Hello,

Yes, there are a few methods that could be used to measure the thickness of concrete / cement linings and or coatings. The 1st is Ground Penetrating Radar which will measure the thickness of the concrete by detecting the strong dielectric change at the concrete-steel interface. This method must be done from the concrete side not the steel side.
The 2nd method is Impact Echo testing which essentially uses very low frequency impacts on the concrete surface. The frequency response from the echo at the interface can be correlated to a thickness.
The 3rd method would be to use Radiography to get a profile image of the pipe. This method may/may not work depending on the size and thickness of the pipe and concrete.

Thanks,
Todd Allen
Radarview Structural and Underground Services
281-705-9476


    
 
 
Bijay Muduli
Engineering
IOCL, India, Joined Jul 2003, 4

Bijay Muduli

Engineering
IOCL,
India,
Joined Jul 2003
4
02:08 Oct-16-2003
Re: Ultrasonics for Cement Lining
----------- Start Original Message -----------
: : 1) Is there any Ultrasonic technique to measure lining/ coating thickness on steel pipes?
: : 2) Can dual probes help in this regard?
: : Your valuable replies shall be appreciated.
: : Regards
: Hello,
: Yes, there are a few methods that could be used to measure the thickness of concrete / cement linings and or coatings. The 1st is Ground Penetrating Radar which will measure the thickness of the concrete by detecting the strong dielectric change at the concrete-steel interface. This method must be done from the concrete side not the steel side.
: The 2nd method is Impact Echo testing which essentially uses very low frequency impacts on the concrete surface. The frequency response from the echo at the interface can be correlated to a thickness.
: The 3rd method would be to use Radiography to get a profile image of the pipe. This method may/may not work depending on the size and thickness of the pipe and concrete.
: Thanks,
: Todd Allen
: Radarview Structural and Underground Services
: 281-705-9476
------------ End Original Message ------------

Thank you verymuch Mr Allen.




    
 
 

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