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Technical Discussions
Rigzang Tashi
Engineering,
Punatsangchhu-I Hydroelectric Project Authority, Bhutan, Joined Aug 2015, 12

Rigzang Tashi

Engineering,
Punatsangchhu-I Hydroelectric Project Authority,
Bhutan,
Joined Aug 2015
12
06:29 Jan-19-2016
Ultrasonic testing of Fillet Weld

Whether Fillet Weld can be quality checked by Ultrasonic Testing?

 
 Reply 
 
Nigel Armstrong
Engineering, - Specialist services
United Kingdom, Joined Oct 2000, 1096

Nigel Armstrong

Engineering, - Specialist services
United Kingdom,
Joined Oct 2000
1096
13:48 Jan-19-2016
Re: Ultrasonic testing of Fillet Weld
In Reply to Rigzang Tashi at 06:29 Jan-19-2016 (Opening).

A technician of proven skill and expertise of testing fillet welds should be able to tell you of the test limitations caused by the configuration. There will be limitations. I expect the majority of Level 2 UT technicians will run a (some) probe(s) over the parent material and pronounce he fillet weld OK.

But how is the skilled technician located unless there is an extensive trial programme involving multiple technicians testing samples with seeded defects

 
 Reply 
 
Ed Ginzel
R & D, -
Materials Research Institute, Canada, Joined Nov 1998, 1282

Ed Ginzel

R & D, -
Materials Research Institute,
Canada,
Joined Nov 1998
1282
15:08 Jan-19-2016
Re: Ultrasonic testing of Fillet Weld
In Reply to Rigzang Tashi at 06:29 Jan-19-2016 (Opening).

If you type "fillet weld" in the NDT.net search you will find 185 references to this discussion since about 2000 in the forum alone. There are 99 items identified in the literature on NDT.net. The effectiveness of your test will be a function of the material and geometry tested, the technique used and the skill of the technicians. Your question is too general to answer specifically.

 
 Reply 
 
Paul Holloway
Consultant,
Holloway NDT & Engineering Inc , Canada, Joined Apr 2010, 200

Paul Holloway

Consultant,
Holloway NDT & Engineering Inc ,
Canada,
Joined Apr 2010
200
15:17 Jan-19-2016
Re: Ultrasonic testing of Fillet Weld
In Reply to Rigzang Tashi at 06:29 Jan-19-2016 (Opening).

zoom image
Sure you can test a fillet weld quality for UT, but it won't tell you much.

You're basically trying to thread the needle, bouncing a beam off the backside and through a relatively window. Flaws in the middle like slag and porosity might be detected with one probe, but fusion zone flaws would have to be done with two probes as illustrated. And in a "through-mode" inspection you don't get any information on the flaw depth, you just get lateral position.

The larger the weld, the more data you can get. Personally, I wouldn't touch fillet welds with regular UT.
 
 Reply 
 
Rigzang Tashi
Engineering,
Punatsangchhu-I Hydroelectric Project Authority, Bhutan, Joined Aug 2015, 12

Rigzang Tashi

Engineering,
Punatsangchhu-I Hydroelectric Project Authority,
Bhutan,
Joined Aug 2015
12
06:45 Jan-20-2016
Re: Ultrasonic testing of Fillet Weld
In Reply to Ed Ginzel at 15:08 Jan-19-2016 .

Sir Ed Genzil,

Thanks for your valuable comments!


I have tried to draw a scanning area of the fillet weld encountered at my work. I tried using two different probe angles (45 & 60 degree) to draw scanning area. I found that the calculated Full Skip Length & Half skip Length and Full beam path Length & half Beam path length is not covering the complete weld area. I am attaching my drawing in your personal email address.

Thanks for your kind help and sharing information!

 
 Reply 
 
Rigzang Tashi
Engineering,
Punatsangchhu-I Hydroelectric Project Authority, Bhutan, Joined Aug 2015, 12

Rigzang Tashi

Engineering,
Punatsangchhu-I Hydroelectric Project Authority,
Bhutan,
Joined Aug 2015
12
07:14 Jan-20-2016
Re: Ultrasonic testing of Fillet Weld
In Reply to Nigel Armstrong at 13:48 Jan-19-2016 .

Sir,

I agree to your comments.

The Geometry of a weld joint and its configuration is a main factor to be considered. And your statement is true. Our Company's UT level 2 Technician did a scanning of fillet weld with 45 degree TR probe and certified no defects. I being from Purchaser side didn't agree with his Testing procedure and have not accepted the product. He did it without even knowing the scan area covered by his probe.

Thanks!

 
 Reply 
 
Daniel Braun
Daniel Braun
13:35 Jan-20-2016
Re: Ultrasonic testing of Fillet Weld
In Reply to Rigzang Tashi at 06:29 Jan-19-2016 (Opening).

It is well known that the ultrasonic inspection of various fillet welds is performed in the industry successfully since almost 60 years ago and it would be very useful to learn the fundamentals prior to going to the field. On the other hand there is a serious lack of access to the fundamental sources so first of all it is possible to find something here:

http://www.sonotronndt.com/NDT_CLASSICS/KK.pdf - Chapter 28.2 pages 459...462

http://www.sonotronndt.com/NDT_CLASSICS/Gurvich_1963.pdf - Chapter V pages 132...142

http://www.sonotronndt.com/NDT_CLASSICS/Gurvich_Ermolov_1972.pdf - Chapter IX pages 336...349

Based on the fundamentals the PA-based solutions for the ultrasonic inspection of fillet welds have been created during recent decade

1. Application note for the compression wave inspection from the outer surface of the flange:

http://www.sonotronndt.com/APPLICATIONS/FILLET_TEE_PA/COMPRESSION_WAVE/FILLET_TEE_WELDS_INCOMPLETE_PENETRATION_COMPRESSION_WAVE.pdf

Raw Data Files for that application note are here:

http://www.sonotronndt.com/APPLICATIONS/FILLET_TEE_PA/COMPRESSION_WAVE/Linear_Scan/Complete_Penetration.sab

http://www.sonotronndt.com/APPLICATIONS/FILLET_TEE_PA/COMPRESSION_WAVE/Linear_Scan/Complete_Penetration_RF.sab

http://www.sonotronndt.com/APPLICATIONS/FILLET_TEE_PA/COMPRESSION_WAVE/Linear_Scan/Incomplete_Penetration.sab

http://www.sonotronndt.com/APPLICATIONS/FILLET_TEE_PA/COMPRESSION_WAVE/Linear_Scan/Incomplete_Penetration_RF.sab

http://www.sonotronndt.com/APPLICATIONS/FILLET_TEE_PA/COMPRESSION_WAVE/Linear_Scan/C_SCAN.sac

http://www.sonotronndt.com/APPLICATIONS/FILLET_TEE_PA/COMPRESSION_WAVE/Linear_Scan/C_SCAN_RF.sac

http://www.sonotronndt.com/APPLICATIONS/FILLET_TEE_PA/COMPRESSION_WAVE/Sector_Scan/Complete_Penetration.sbs

http://www.sonotronndt.com/APPLICATIONS/FILLET_TEE_PA/COMPRESSION_WAVE/Sector_Scan/Incomplete_Penetration.sbs

http://www.sonotronndt.com/APPLICATIONS/FILLET_TEE_PA/COMPRESSION_WAVE/Sector_Scan/Scanning_Along_Weld.sbc

You may play back the A-Scans, etc in the computer using the ISONIC PA Office SW Package available for the free download at ttp://www.sonotronndt.com/support.htm

2. Application note for the shear wave inspection from the web and from the inner surface of the flange:

http://www.sonotronndt.com/APPLICATIONS/FILLET_TEE_PA/SHEAR_WAVE/FILLET_TEE_WELDS_INCOMPLETE_PENETRATION_SHEAR_WAVE.pdf

Raw Data Files for that application note are here:

http://www.sonotronndt.com/APPLICATIONS/FILLET_TEE_PA/SHEAR_WAVE/FROM_THE_WEB/Web_No_Defect.fbs

http://www.sonotronndt.com/APPLICATIONS/FILLET_TEE_PA/SHEAR_WAVE/FROM_THE_WEB/Web_Incomplete_Penetration.fbs

http://www.sonotronndt.com/APPLICATIONS/FILLET_TEE_PA/SHEAR_WAVE/FROM_THE_WEB/Web_Crack.fbs

http://www.sonotronndt.com/APPLICATIONS/FILLET_TEE_PA/SHEAR_WAVE/FROM_THE_FLANGE/Incomplete_Penetration/No_Defect_Geometry_Echo.fbs

http://www.sonotronndt.com/APPLICATIONS/FILLET_TEE_PA/SHEAR_WAVE/FROM_THE_FLANGE/Crack/Flange_Crack.fbs

http://www.sonotronndt.com/APPLICATIONS/FILLET_TEE_PA/SHEAR_WAVE/FROM_THE_FLANGE/Incomplete_Penetration/Incomplete_Penetration.fbs

http://www.sonotronndt.com/APPLICATIONS/FILLET_TEE_PA/SHEAR_WAVE/FROM_THE_FLANGE/Incomplete_Penetration/C_Scan_Incomplete_Penetration.fcs

http://www.sonotronndt.com/APPLICATIONS/FILLET_TEE_PA/SHEAR_WAVE/FROM_THE_FLANGE/Crack/C_Scan_Crack.fcs

You may play back the A-Scans, etc in the computer using the ISONIC PA Office SW Package available for the free download at ttp://www.sonotronndt.com/support.htm

3. Other sources that may be useful:

http://www.sonotronndt.com/APPLICATIONS/PA_APPS/ISONIC_2009_2010_PA_APPS.pdf - pages 15...28

The raw data files may be found here ZIP file here:

http://www.sonotronndt.com/APPLICATIONS/PA_APPS/INSTRUMENT_FILES_PA_APPS.zip

Upon extracting from ZIP archive the files may be played back in the computer using the ISONIC PA Office SW Package available for the free download at http://www.sonotronndt.com/support.htm

 
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