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- since 1996 -
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x.j.
Student,
China, Joined Jul 2004, 1

x.j.

Student,
China,
Joined Jul 2004
1
05:47 Jul-09-2004
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


    
 
 Reply 
 
fs
fs
02:38 Jul-09-2004
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.


    
 
 Reply 
 
MIC
Consultant
AGM Techno consultants, India, Joined Jan 2003, 22

MIC

Consultant
AGM Techno consultants,
India,
Joined Jan 2003
22
06:15 Jul-12-2004
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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