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Technical Discussions
Nirav Dave
NDT Inspector,
Company, India, Joined Jul 2014, 11

Nirav Dave

NDT Inspector,
Company,
India,
Joined Jul 2014
11
05:22 Jan-12-2015
Immersion UT

Dear Friends

what is the minimum diameter and thickness can be tested with automated ultrasonic immersion technique?

is it feasible to test 4mm OD x 0.5mm thickness using immersion technique?

Rgs
Nirav

 
 Reply 
 
Joe Buckley
Consultant, ASNT L-III, Honorary Secretary of BINDT
Level X NDT, BINDT, United Kingdom, Joined Oct 1999, 526

Joe Buckley

Consultant, ASNT L-III, Honorary Secretary of BINDT
Level X NDT, BINDT,
United Kingdom,
Joined Oct 1999
526
09:37 Jan-12-2015
Re: Immersion UT
In Reply to Nirav Dave at 05:22 Jan-12-2015 (Opening).

Hi Nirav

What are you trying to test for? With a fairly specialised high frequency setup it might be possible to check wall thickness, concentricity etc. It's probably too thin for other tests.

Joe


 
 Reply 
 
Nirav Dave
NDT Inspector,
Company, India, Joined Jul 2014, 11

Nirav Dave

NDT Inspector,
Company,
India,
Joined Jul 2014
11
09:42 Jan-12-2015
Re: Immersion UT
In Reply to Joe Buckley at 09:37 Jan-12-2015 .

Hello joe

initially i am looking for flaw detection.

i know that thickness is very less but that is what one of my client asked for.

Rgs
Nirav

 
 Reply 
 
Wieslaw Bicz
Engineering,
PBP Optel sp. z o.o., Poland, Joined Feb 2009, 266

Wieslaw Bicz

Engineering,
PBP Optel sp. z o.o.,
Poland,
Joined Feb 2009
266
11:58 Jan-12-2015
Re: Immersion UT
In Reply to Nirav Dave at 09:42 Jan-12-2015 .

It is not a problem to test pipes with even much smaller diameter ans wall thickness. You need only sufficient high frequency. 0.5 mm can be tested with about 10MHz, but you need transducer with linear focus and good mechanical adjustment. We have made some systems for similar application, this works quite perfectly.

 
 Reply 
 
shibu
India, Joined Jun 2014, 45

shibu

India,
Joined Jun 2014
45
15:18 Jan-12-2015
Re: Immersion UT
In Reply to Wieslaw Bicz at 11:58 Jan-12-2015 .

dear friend,
6.6 mm OD and .45 mm succesfully inspected with curved concave phased array probe in immersion UT. 10 MHz frequency used.

 
 Reply 
 
Phil Harper
Director, Tribosonics
Tribosonics Ltd, United Kingdom, Joined Feb 2004, 9

Phil Harper

Director, Tribosonics
Tribosonics Ltd,
United Kingdom,
Joined Feb 2004
9
16:52 Jan-13-2015
Re: Immersion UT
In Reply to Nirav Dave at 05:22 Jan-12-2015 (Opening).

Hi Nirav,

It is possible to use some frequency domain techniques to measure very thin layers, thinner than you may anticipate. It should be possible to measure down to about 0.24mm using a 10 MHz centre frequency transducer. If the inside of the tube is filled with water then this can drop to about 0.05mm. Set-up is key though.

Phil

 
 Reply 
 

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