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 firstname.lastname@example.org