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Technical Discussions
Paul Skidmore
NDT Inspector
USA, Joined Dec 2008, 2

Paul Skidmore

NDT Inspector
USA,
Joined Dec 2008
2
14:51 Nov-12-2009
Mag Particle and Senativity check

IF you have a central conducter rod and a 44 foot of 4 1/2 .250 wall casing pipe how can you check the senativity of mag particle inspection being done on it beside a castrol strip. I have had several differnt people say it cant be done

    
 
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Jim Draper
Consultant, ASNT Level III MT PT RT VT
Draper NDT, USA, Joined Jul 2009, 99

Jim Draper

Consultant, ASNT Level III MT PT RT VT
Draper NDT,
USA,
Joined Jul 2009
99
15:34 Nov-12-2009
Re: Mag Particle and Senativity check
In Reply to Paul Skidmore at 14:51 Nov-12-2009 (Opening).

You could also use a QQI. It is a thin piece of metal with grooves in it. There is one with three circles cut into it, each circle a different depth. That would work. You could also use a hall effect gauss meter to verify the magnetic flux density on the surface of the pipe. It should be between 30 and 60 gauss. Or, if you have a piece of the pipe with a known discontinuity of the type you will be looking for, you could use that to prove the sensitivity of the test.

    
 
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Andreas
NDT Inspector, Specially in the oilfield
Tuboscope Vetco(Deutschland)Gmbh, Germany, Joined Oct 1999, 129

Andreas

NDT Inspector, Specially in the oilfield
Tuboscope Vetco(Deutschland)Gmbh,
Germany,
Joined Oct 1999
129
16:08 Nov-12-2009
Re: Mag Particle and Senativity check
In Reply to Jim Draper at 15:34 Nov-12-2009 .

Go to the side of ASNT at look there for the technian V8NO2 , it explain well how to chek should be done ba the castrol strip.
Since you have a radial field in the pipe ,there is hardly ay field outside of the pipe.
Easiest way with the strip is to grind a small gouge inthe pipe.
Anyway if you inspect casing acc to API ,there is a recomandation for the minimum cd amperagedepende of the weight of pipe and unit used.
Andreas

    
 
 Reply 
 
Andreas
NDT Inspector, Specially in the oilfield
Tuboscope Vetco(Deutschland)Gmbh, Germany, Joined Oct 1999, 129

Andreas

NDT Inspector, Specially in the oilfield
Tuboscope Vetco(Deutschland)Gmbh,
Germany,
Joined Oct 1999
129
16:27 Nov-12-2009
Re: Mag Particle and Senativity check
In Reply to Andreas at 16:08 Nov-12-2009 .

For your info the Spec is the API 5A5 and the 5CT.

Regards

Andreas

    
 
 Reply 
 
Rafid Omar López
Rafid Omar López
22:42 Nov-12-2009
Re: Mag Particle and Senativity check
In Reply to Paul Skidmore at 14:51 Nov-12-2009 (Opening).

I need the norm ASTM E1316. Somebody has this norm? thanks

My mail is: rafid4@hotmail.com

Kind regards.

    
 
 Reply 
 

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