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480 views
05:47 Jul-09-2004

x.j.

Student,
China,
Joined Jul 2004
1
How to distinguish inside and outside flaw of pipe by MFL?

which typic characteristic between inside flaw and outside flaw' signal by using MFL method? I use FFT or PSD to process the signals but no typic characteristic can be get now!
thanks a lot


 
02:38 Jul-09-2004
fs
Re: How to distinguish inside and outside flaw of pipe by MFL? ----------- Start Original Message -----------
: which typic characteristic between inside flaw and outside flaw' signal by using MFL method? I use FFT or PSD to process the signals but no typic characteristic can be get now!
: thanks a lot
------------ End Original Message ------------

inside flaw and outside flaw' signal have different frequency.


 
06:15 Jul-12-2004

MIC

Consultant
AGM Techno consultants,
India,
Joined Jan 2003
22
Re: How to distinguish inside and outside flaw of pipe by MFL? MFL was used normally as a tool to detect and not to distinguish between I.D and O.D. but I have operated an instrument that belongs to R/D tech to test tubes – carbon steel - who has got capability to do the distinguish.

I did operated 3-different Tank floor machines based on MFL , also other brands of tube inspection devices based on MFL, and a pipe scanner with permanent Magnet, and I always want to have this facility.

The fact was known that Frequency will be different for I.D and O.D flaws, but was not avail to me till I operated R/D instrument. Need more info please send mail to mic_ndt@yahoo.com



 


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