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- since 1996 -
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Technical Discussions
Dhiae
ISQ, Algeria, Joined Jan 2020, 4

Dhiae

ISQ,
Algeria,
Joined Jan 2020
4
14:57 Jan-16-2020
PAUT ( corrosion mapping) high temperature Solution.

Hi inspectors,
that's my first subject on ndt.net, i have an issues on application of corrosion mapping in high temperature (73 °C) using Omniscan X2 ( SA12 Probe), what im doing now is to change the coupling after two indication, and its helpful, but i dont want to risk the equipment ( probe ), is there any solution for that problem?

 
 Reply 
 
Creed
NDT Inspector,
Vietnam, Joined Jul 2009, 37

Creed

NDT Inspector,
Vietnam,
Joined Jul 2009
37
04:59 Jan-17-2020
Re: PAUT ( corrosion mapping) high temperature Solution.
In Reply to Dhiae at 14:57 Jan-16-2020 (Opening).

Can you use HydroForm probe for corrosion mapping?

 
 Reply 
 
Dhiae
ISQ, Algeria, Joined Jan 2020, 4

Dhiae

ISQ,
Algeria,
Joined Jan 2020
4
06:45 Jan-17-2020
Re: PAUT ( corrosion mapping) high temperature Solution.
In Reply to Creed at 04:59 Jan-17-2020 .

No, i cant because the surface it not hellping.

 
 Reply 
 
laurie
Australia, Joined Feb 2019, 39

laurie

Australia,
Joined Feb 2019
39
14:24 Jan-18-2020
Re: PAUT ( corrosion mapping) high temperature Solution.
In Reply to Dhiae at 14:57 Jan-16-2020 (Opening).

HydroForm might be your solution.
The water delay and constant water feed would keep the heat away from the probe and the water path would give you good results.

 
 Reply 
 
Paul Holloway
Consultant,
Holloway NDT & Engineering Inc , Canada, Joined Apr 2010, 242

Paul Holloway

Consultant,
Holloway NDT & Engineering Inc ,
Canada,
Joined Apr 2010
242
19:27 Jan-18-2020
Re: PAUT ( corrosion mapping) high temperature Solution.
In Reply to laurie at 14:24 Jan-18-2020 .

Good idea Laurie. Also, the 73 deg C might cause the adhesive on the HydroFORM gaskets to wear out quicker. That's pretty warm but not ridiculous. I'd say just make sure the bag of gaskets is full before the job starts. And setup all the spare parts so they can do quick changes in the field and keep running.

HydroFORM is a great product.

 
 Reply 
 
Dhiae
ISQ, Algeria, Joined Jan 2020, 4

Dhiae

ISQ,
Algeria,
Joined Jan 2020
4
07:00 Jan-19-2020
Re: PAUT ( corrosion mapping) high temperature Solution.
In Reply to Paul Holloway at 19:27 Jan-18-2020 .

Paul,

about the rough surface ( external corrosion ) we clean the pipe before inspection with bronze hammer and metallic brash, i make the surface clean and i do the inspection,
and about the hydro-form, its not helping, because the surface its very corroded and that make it so hard for the gaskets to stay in shape.

 
 Reply 
 
laurie
Australia, Joined Feb 2019, 39

laurie

Australia,
Joined Feb 2019
39
08:58 Jan-19-2020
Re: PAUT ( corrosion mapping) high temperature Solution.
In Reply to Dhiae at 07:00 Jan-19-2020 .

If the surface is very corroded the RexoForm has a 20mm Rexolite delay wedge and it looks like you can order with water feed nozzles.

 
 Reply 
 
Paul Holloway
Consultant,
Holloway NDT & Engineering Inc , Canada, Joined Apr 2010, 242

Paul Holloway

Consultant,
Holloway NDT & Engineering Inc ,
Canada,
Joined Apr 2010
242
20:06 Jan-19-2020
Re: PAUT ( corrosion mapping) high temperature Solution.
In Reply to Dhiae at 07:00 Jan-19-2020 .

External corrosion? In that case, get out your grid sheets and your pen probe. You could mess around all day and night fighting with a PAUT setup and get nowhere... or you could just do it old school and get it over with.

 
 Reply 
 
laurie
Australia, Joined Feb 2019, 39

laurie

Australia,
Joined Feb 2019
39
21:47 Jan-19-2020
Re: PAUT ( corrosion mapping) high temperature Solution.
In Reply to Paul Holloway at 20:06 Jan-19-2020 .

Depending on how bad the surface is UT might only be part of the solution.
A straight edge and pit gauge with spot or grid measurements where you can is often the best solution.
RollerForm, HydroForm, RexoForm, small diameter twin or single crystal probes including pen probes, pit gauges and straight edges all have their place but alone none of them will cover every situation.

 
 Reply 
 

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