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Technical Discussions
Sundar
Qatar, Joined Aug 2015, 19

Sundar

Qatar,
Joined Aug 2015
19
12:42 Sep-24-2015
UT Lamination on high temperature

ut thickness & lamination on high temperature piping ,how can get accurate thickness measured .

3
 
 Reply 
 
Anmol Birring
Consultant,
Birring NDE Center, Inc., USA, Joined Aug 2011, 832

Anmol Birring

Consultant,
Birring NDE Center, Inc.,
USA,
Joined Aug 2011
832
14:43 Sep-24-2015
Re: UT Lamination on high temperature
In Reply to Sundar at 12:42 Sep-24-2015 (Opening).

Temperature reduces ultrasonic velocity and if not compensated will result in increased thickness readings. Here are the steps.
1. Place the step block for five minutes on the high temperature piping being tested.
2. calibrate for thickness measurement on the hot step block
3. Use high temperature couplant such sonotemp 600
4. Take thickness measurements
5. Keep contact time to minimum and cool the UT probe periodically by dipping in water

Good luck !

2
 
 Reply 
 
Tom Nelligan
Engineering,
retired, USA, Joined Nov 1998, 390

Tom Nelligan

Engineering,
retired,
USA,
Joined Nov 1998
390
14:48 Sep-24-2015
Re: UT Lamination on high temperature
In Reply to Sundar at 12:42 Sep-24-2015 (Opening).

We have an application note on this subject that may be of interest:

http://www.olympus-ims.com/en/applications/high-temperature-ultrasonic-testing

4
 
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