where expertise comes together - since 1996 -

The Largest Open Access Portal of Nondestructive Testing (NDT)

Conference Proceedings, Articles, News, Exhibition, Forum, Network and more

where expertise comes together
- since 1996 -

Sonotron NDT
Original developer and manufacturer of advanced ultrasonic instruments
2000 views
Technical Discussions
gowri santhosh
NDT Inspector,
Royscan engineering pte ltd, Singapore, Joined May 2008, 52

gowri santhosh

NDT Inspector,
Royscan engineering pte ltd,
Singapore,
Joined May 2008
52
04:03 Oct-25-2008
UT for below 8mm thk

hi, this is santhosh
please tell me about UT for below 8mm thickness with reference code. thanks for reply.


    
 
 Reply 
 
Ed T.
Ed T.
07:46 Oct-25-2008
Re: UT for below 8mm thk
----------- Start Original Message -----------
: hi, this is santhosh
: please tell me about UT for below 8mm thickness with reference code. thanks for reply.
------------ End Original Message ------------

Please provide more details. MAnual or automated UT? What type of material.




    
 
 Reply 
 
NEELA
NEELA
07:23 Oct-26-2008
Re: UT for below 8mm thk
----------- Start Original Message -----------
: hi, this is santhosh
: please tell me about UT for below 8mm thickness with reference code. thanks for reply.
------------ End Original Message ------------

As per AWS D 1.1 you cannot peform UT below 8mm thickness It require client acceptance and special calibration block required



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

Tom Nelligan

Engineering,
retired,
USA,
Joined Nov 1998
390
03:55 Oct-27-2008
Re: UT for below 8mm thk
If AWS code compliance is required, that is an issue, however there is no inherent physics reason why you can't perform angle beam flaw detection, straight beam flaw detection, or ultrasonic thickness gaging on thinner metal. With proper transducers and appropriate setup on appropriate reference standards, you can obtain useful information.


----------- Start Original Message -----------
: As per AWS D 1.1 you cannot peform UT below 8mm thickness It require client acceptance and special calibration block required
------------ End Original Message ------------




    
 
 Reply 
 
David Harvey
Engineering
ATI - Wah Chang, USA, Joined Nov 2002, 42

David Harvey

Engineering
ATI - Wah Chang,
USA,
Joined Nov 2002
42
06:12 Oct-27-2008
Re: UT for below 8mm thk
----------- Start Original Message -----------
: If AWS code compliance is required, that is an issue, however there is no inherent physics reason why you can't perform angle beam flaw detection, straight beam flaw detection, or ultrasonic thickness gaging on thinner metal. With proper transducers and appropriate setup on appropriate reference standards, you can obtain useful information.
:
: : As per AWS D 1.1 you cannot peform UT below 8mm thickness It require client acceptance and special calibration block required
------------ End Original Message ------------

If near-surface resolution is a concern, material this thin can be a tough one. You can find yourself in a spot where you will need to resort to a through transmission type of test, which won't much care about surface resolution.


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

Tom Nelligan

Engineering,
retired,
USA,
Joined Nov 1998
390
06:54 Oct-27-2008
Re: UT for below 8mm thk
Good near surface resolution is a function of transducer selection as well as test material properties. For straight beam testing or thickness gaging in steel, a 20 MHz broadband transducer -- within the bandwidth of most portable flaw detectors -- will typically resolve reflectors within 0.5 mm of the contact surface, and a 10 MHz broadband transducer will typically get within 1 mm or better. But if you don't have a high frequency transducer available, I agree that there will be limitations. It's just a question of using an optimum transducer and instrument setup.

----------- Start Original Message -----------
:: If near-surface resolution is a concern, material this thin can be a tough one. You can find yourself in a spot where you will need to resort to a through transmission type of test, which won't much care about surface resolution.
------------ End Original Message ------------




    
 
 Reply 
 
JK
JK
08:09 Oct-29-2008
Re: UT for below 8mm thk
Hi,

Though there are some codes which allow UT to be carried out above 6 mm.

Using a 4Mhz transducer(8x9 mm) preferebly 70,80 degree krautkrammer probes & increasing the skip to 1-2 skip .

The best way to do is take a mock-up peice of the thickness of the weld you are going to test . A notch on the root and on the crown of the weld would be used as reference.

Anything more on this please contact me

Regards
J.K




    
 
 Reply 
 
NEELA
NEELA
06:13 Oct-30-2008
Re: UT for below 8mm thk
Dear J.K.
Please mention the code ,It will help forum member to discuss further
Thanks
----------- Start Original Message -----------
: Hi,
: Though there are some codes which allow UT to be carried out above 6 mm.
: Using a 4Mhz transducer(8x9 mm) preferebly 70,80 degree krautkrammer probes & increasing the skip to 1-2 skip .
: The best way to do is take a mock-up peice of the thickness of the weld you are going to test . A notch on the root and on the crown of the weld would be used as reference.
: Anything more on this please contact me
: Regards
: J.K
------------ End Original Message ------------




    
 
 Reply 
 
chris s
Consultant, qc manager
USA, Joined Apr 2007, 9

chris s

Consultant, qc manager
USA,
Joined Apr 2007
9
08:08 Nov-04-2008
Re: UT for below 8mm thk
----------- Start Original Message -----------
: hi, this is santhosh
: please tell me about UT for below 8mm thickness with reference code. thanks for reply.
------------ End Original Message ------------

I would suggest that you contact a level III who is knowledgeable in regards to phased array, make appropriate mock-ups and test your techs accordingly


    
 
 Reply 
 

Product Spotlight

Silverwing RMS PA - Phased-array corrosion mapping

Eddyfi Technologies integrated two market leading solutions, Silverwing’s RMS and M2M’s instru
...
ments to provide a high-speed, remote access ultrasonic phased-array inspection system with live total focusing method (TFM).
>

NovaScope 6000

The all-digital Novascope 6000 is a portable, ultra-high precision thickness gauge for high-speed
...
thickness measurement. Novascope 6000 has unmatched capabilities and unique features including: •Superior Resolution with high contrast, high-speed color RF display •High pulser voltage •Real-time video output •Increased internal/external data storage •Programmable SetUp features •Battery & AC Powered
>

Panther

M2M PANTHER is a phased-array equipment designed for both desktop and industrial applications, offer
...
ing unparalleled performance in a compact unit. It combines the speed required for industrial integrated Phased-Array Ultrasound (PAUT) solutions, with the most complete set of total focusing method (TFM) imaging techniques, making it the ultimate tool for R&D and procedure qualification.
>

SONOAIR - air-coupled Phased Array Ultrasonic Inspection System

For highly attenuating materials, the performance of the system is critical. The ultrasonic sensors,
...
the scanning area and the system settings should be flexibly adapted to the test task and the material. These high expectations are met with the new and modular testing system SONOAIR. With the world’s first air-coupled phased-array UT inspection system SONOAIR we developed a technology that works with up to 4 transmitter and receiver channels with freely configurable square wave burst transmitters as wells as low noise receiving amplifiers.
>

Share...
We use technical and analytics cookies to ensure that we will give you the best experience of our website - More Info
Accept
top
this is debug window