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 -

EXTENDE
EXTENDE, optimize your NDT inspections projects thanks to simulation.

1245 views
Technical Discussions
Terry Martin
Terry Martin
07:35 Jul-02-1998
Crack detection in thin wall exhaust tubing

We are currently researching the possibility of detecting weld cracks in stainless steel exhaust tubing during the manufacturing process using ultrasonics. How small of a crack can be detected using this method and where can I get a list of North American vendors.


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

Tom Nelligan

Engineering,
retired,
USA,
Joined Nov 1998
390
08:01 Jul-02-1998
Re: Crack detection in thin wall exhaust tubing

: We are currently researching the possibility of detecting weld cracks in stainless steel exhaust tubing during the manufacturing process using ultrasonics. How small of a crack can be detected using this method and where can I get a list of North American vendors.

The general answer to your question is that ultrasonic inspection can potentially detect cracks in metal tubing as small as a small fraction of a millimeter in depth. In each specific application, however, resolution will be determined by material and geometry related factors that in this case would include the shape and size of any weld bead present at the inspection point, and the amount of sound scattering from grain structure in the weld. Inspection throughput rate requirements must also be considered if this is to be an in-process test. Resolution limits in a specific test situation would be established through tests of reference samples containing typical defects of various sizes.

We are one of a number of North American manufacturers of ultrasonic NDT equipment. I'm sure you'll hear from some of the others too!

--Tom Nelligan
Senior Applications Engineer
Panametrics, Inc.
http://www.panametrics.com/ndt/


    
 
 
Paul Leeder
Paul Leeder
02:08 Dec-19-1998
Re: Crack detection in thin wall exhaust tubing
: We are currently researching the possibility of detecting weld cracks in stainless steel exhaust tubing during the manufacturing process using ultrasonics. How small of a crack can be detected using this method and where can I get a list of North American vendors.




    
 
 
Paul J. Leeder
Paul J. Leeder
02:18 Dec-19-1998
Re: Crack detection in thin wall exhaust tubing
: My company Leeder and Associates, located in Illinois, represents an Ultrasonic and Eddy Current manufacturer. I would be happy to provide anyone with any technical information needed on the inspection of cracks in their tubing. Office phone:(815)389-2079



    
 
 
Rainer Peitz
Rainer Peitz
09:07 Jul-14-2002
Re: Crack detection in thin wall exhaust tubing
: We are currently researching the possibility of detecting weld cracks in stainless steel exhaust tubing during the manufacturing process using ultrasonics. How small of a crack can be detected using this method and where can I get a list of North American vendors.
Have a look at QASS.net.




    
 
 
J. Mark Davis
Teacher, And Consultant
University of Ultrasonics, Birmingham, Alabama, USA, Joined Mar 2000, 85

J. Mark Davis

Teacher, And Consultant
University of Ultrasonics, Birmingham, Alabama,
USA,
Joined Mar 2000
85
00:35 Jul-14-2002
Re: Crack detection in thin wall exhaust tubing
Have you look at Creeping waves? In austentic materials I have been able to detect cracks smaller than 0.005 inches in depth using ID Creeping or OD Creeding Waves.

If you are not familar with Creeping waves see the publication section of www.ndt.net and look at my handbook on Advanced Ultrasonic Flaw Sizing.

J. Mark Davis

: : We are currently researching the possibility of detecting weld cracks in stainless steel exhaust tubing during the manufacturing process using ultrasonics. How small of a crack can be detected using this method and where can I get a list of North American vendors.
: Have a look at QASS.net.
.



    
 
 
Fred Perkins
Fred Perkins
01:17 Jul-14-2002
Re: Crack detection in thin wall exhaust tubing
: : We are currently researching the possibility of detecting weld cracks in stainless steel exhaust tubing during the manufacturing process using ultrasonics. How small of a crack can be detected using this method and where can I get a list of North American vendors.
: Have a look at QASS.net.
.As an alternative, you might look at ESPI or shearographic measurement technology. No tanks required, dry air measurements. Faster, dry. 0.1 micron resolution. ESPI and shearography have been used successfully for this purpose before in the automotive industry. This process can be fully automated. Check www.syncretek.com.



    
 
 
Rick Pfannenstiel
Rick Pfannenstiel
01:35 Jul-14-2002
Re: Crack detection in thin wall exhaust tubing
FAST UT has been used very effectively to examine welds in materials down to 0.040T. This was done on both on stainless and inconnel. Planar flaws down to 0.005" deep can be found. Check our web page at www.spinllc.cc for more information.


    
 
 

Product Spotlight

AIS229 - Multipurpose Real Time System

Latest standard & automatic real time system developed by Balteau. The AIS229 has been designed to
...
do series inspection in a wide variety of industry. Composed of a shielded cabinet, 5 axis manipulator, x-ray generator and tubehead from 160kV to 225kV, a fl at panel & much more, the AIS229 is most certainly one of the most multipurpose RTR system available on the market.
>

AMIGO2

TSC Amigo2 - ACFM technology has developed a solid reputation for accurately detecting and sizing
...
surface-breaking cracks through paint and coatings. As the industry demands increased performance in speed, signal quality, and portability, it’s time for an evolution. It’s time for Amigo2.
>

FD800 Bench Top Flaw Detectors

The bench-top FD800 flaw detector range combines state-of-the-art flaw detection with advanced mater
...
ial thickness capabilities. Designed for use in the laboratory these gauges are the tool you need for all your flaw detecting needs.
>

IntraPhase Athena Phased Array System

The Athena Phased Array system, manufactured by WesDyne NDE Products & Technology, consists of a pha
...
sed array acquisition system and PC running IntraSpect software. A PC is used to perform acquisition, analysis and storage of the data. System hardware is capable of operating up to four data sets with any combination of phased array or conventional UT probes. NOW AVAILABLE IN 64-64 CONFIGURATION.
>

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