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Technical Discussions
Syed Faran Hussain
Engineering
FFC Pakistan, Pakistan, Joined May 2005, 17

Syed Faran Hussain

Engineering
FFC Pakistan,
Pakistan,
Joined May 2005
17
02:21 May-21-2005
Iris

how come in iris technique which is based on UT, the probe which is at the centre of the tube, sends ultrasonic waves without a couplant b/w the probe & the internal wall of the tube.



    
 
 Reply 
 
Saju Xavier
Saju Xavier
02:29 May-22-2005
Re: Iris
----------- Start Original Message -----------
: how come in iris technique which is based on UT, the probe which is at the centre of the tube, sends ultrasonic waves without a couplant b/w the probe & the internal wall of the tube.
------------ End Original Message ------------

Hi
IRIS is also a pulse echo ultrasonic testing...u could describe it as a kind of immersion testing also.You can fill the tube ID with water and can easily get thickness reading.And as the mirror/target attached with the probe rotates you will get the thickness around the complete circuference of the tube.



    
 
 Reply 
 
Syed Faran Hussain
Engineering
FFC Pakistan, Pakistan, Joined May 2005, 17

Syed Faran Hussain

Engineering
FFC Pakistan,
Pakistan,
Joined May 2005
17
05:57 May-23-2005
Re: Iris
If it is so that the tube should be filled with water, how come it is possible to fill the tubes with water if the tubes are horizontal, if we plug the tubes how would be we able to push the probe then. I am still confused about the "how iris works using the immersion technique, its hard to digest that water is used as couplant"
----------- Start Original Message -----------
: : how come in iris technique which is based on UT, the probe which is at the centre of the tube, sends ultrasonic waves without a couplant b/w the probe & the internal wall of the tube.
: Hi
: IRIS is also a pulse echo ultrasonic testing...u could describe it as a kind of immersion testing also.You can fill the tube ID with water and can easily get thickness reading.And as the mirror/target attached with the probe rotates you will get the thickness around the complete circuference of the tube.
------------ End Original Message ------------




    
 
 Reply 
 
Joe Buckley
Consultant, ASNT L-III, Honorary Secretary of BINDT
Level X NDT, BINDT, United Kingdom, Joined Oct 1999, 522

Joe Buckley

Consultant, ASNT L-III, Honorary Secretary of BINDT
Level X NDT, BINDT,
United Kingdom,
Joined Oct 1999
522
00:26 May-23-2005
Re: Iris

IRIS systems use a pressurized water supply (mains water or pumped) which acts as a couplant and drives the mirror rotation via a small turbine.

Typically (as you can see using a clear plastic tube) it is only an inch or two around the mirror/sensor that is filled with water.

The system (if properly engineered) works very well

Joe

----------- Start Original Message -----------
: If it is so that the tube should be filled with water, how come it is possible to fill the tubes with water if the tubes are horizontal, if we plug the tubes how would be we able to push the probe then. I am still confused about the "how iris works using the immersion technique, its hard to digest that water is used as couplant"
: : : how come in iris technique which is based on UT, the probe which is at the centre of the tube, sends ultrasonic waves without a couplant b/w the probe & the internal wall of the tube.
: : Hi
: : IRIS is also a pulse echo ultrasonic testing...u could describe it as a kind of immersion testing also.You can fill the tube ID with water and can easily get thickness reading.And as the mirror/target attached with the probe rotates you will get the thickness around the complete circuference of the tube.
------------ End Original Message ------------




    
 
 Reply 
 
Tony McMurtry
Tony McMurtry
03:34 Sep-01-2005
Re: Iris
----------- Start Original Message -----------
:Currently, the IRIS uses a flood for tubes above
approx. .75 inch. Tubes with an ID less than .75
inch as a rule do not require flooding...the water
that drives the turbine also acts as the cuplant..
There are other tricks that can be used on larger
(> 2 inch ID tubes)...any questions, please drop
me an e-mail.. I am the Senior Technician with
Pan American Industries...we build IRIS.

: IRIS systems use a pressurized water supply (mains water or pumped) which acts as a couplant and drives the mirror rotation via a small turbine.
: Typically (as you can see using a clear plastic tube) it is only an inch or two around the mirror/sensor that is filled with water.
: The system (if properly engineered) works very well
: Joe
: : If it is so that the tube should be filled with water, how come it is possible to fill the tubes with water if the tubes are horizontal, if we plug the tubes how would be we able to push the probe then. I am still confused about the "how iris works using the immersion technique, its hard to digest that water is used as couplant"
: : : : how come in iris technique which is based on UT, the probe which is at the centre of the tube, sends ultrasonic waves without a couplant b/w the probe & the internal wall of the tube.
: : : Hi
: : : IRIS is also a pulse echo ultrasonic testing...u could describe it as a kind of immersion testing also.You can fill the tube ID with water and can easily get thickness reading.And as the mirror/target attached with the probe rotates you will get the thickness around the complete circuference of the tube.
------------ End Original Message ------------




    
 
 Reply 
 
radiah
radiah
12:02 Feb-26-2013
Re: Iris
In Reply to Tony McMurtry at 03:34 Sep-01-2005 .

could you explain to me how the iris get the data of the thickness from the couplant and the tranducer, could you explain it in form of calculation?

you help is highly appreaciated.

    
 
 Reply 
 

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