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Technical Discussions
zaki
zaki
01:03 Mar-28-2006
DGS Diagrams

Need information on how to use the DGS digrams, also how to plott a DGS diegram for UT peobes


 
 Reply 
 
Gabriel Teodorescu
Gabriel Teodorescu
02:52 Mar-29-2006
Re: DGS Diagrams
----------- Start Original Message -----------
: Need information on how to use the DGS digrams, also how to plott a DGS diegram for UT peobes
------------ End Original Message ------------

To use one DGS diagram is one thing, anf to plot one, is another thing. Generally, persons who can plot diagrams, pretend large sums of money. The best solution is to find an already ploted diagram, which is suited to your transducer. It means the DGS diagrams are plotted taking into account frequency and geometrical dimensions of one particular transducer. There are also general DGS diagrams, which can be used for any transducer.
About the use of DGS diagram, you have to use a book dedicated to this problem.

Teodorescu Gabriel, PH. D.


 
 Reply 
 
Ed Ginzel
R & D, -
Materials Research Institute, Canada, Joined Nov 1998, 1307

Ed Ginzel

R & D, -
Materials Research Institute,
Canada,
Joined Nov 1998
1307
02:30 Mar-29-2006
Re: DGS Diagrams
I am not sure if they will help but you might try plotting your parameters using Ermolov's equations.
There is a software tool on NDT.net at http://www.ndt.net/article/v07n01/ginzel/ginzel.htm

----------- Start Original Message -----------
: : Need information on how to use the DGS digrams, also how to plott a DGS diegram for UT peobes
: To use one DGS diagram is one thing, anf to plot one, is another thing. Generally, persons who can plot diagrams, pretend large sums of money. The best solution is to find an already ploted diagram, which is suited to your transducer. It means the DGS diagrams are plotted taking into account frequency and geometrical dimensions of one particular transducer. There are also general DGS diagrams, which can be used for any transducer.
: About the use of DGS diagram, you have to use a book dedicated to this problem.
: Teodorescu Gabriel, PH. D.
------------ End Original Message ------------




 
 Reply 
 
Andreas Voge
NDT Inspector, Specially in the oilfield
Tuboscope Vetco(Deutschland)Gmbh, Germany, Joined Oct 1999, 131

Andreas Voge

NDT Inspector, Specially in the oilfield
Tuboscope Vetco(Deutschland)Gmbh,
Germany,
Joined Oct 1999
131
03:22 Mar-29-2006
Re: DGS Diagrams

Normally the manufacturer of the probe will supply you with a dgs-diagram for that probe.Otherwise you need need to have ,sorry I know only the german word for it the "Allgemeine AVG Diagram",this apply only to probes without focus or linses and and impuls picture longer than 3 near field length.
Then you get to formulas to calculate the distance and size of the test flaw.But this you should have learned when you make your level examination.

Regards Andreas


 
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