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 -

Matec Instrument Companies, Inc.
Ultrasonic test instrumentation and systems for scientific research, quality control inspection and production testing applications.

999 views
Technical Discussions
Mohiuddin
Mohiuddin
03:22 Apr-15-2006
IR-192 for High Thickness

Did anybody used Ir-192 for steel thickness in the range of 76 mm weldment? If so can you pls tell me how good was the quality. If you have a special technique in this regard pls help me.

regards
Khaja


    
 
 
Daniel H Rice
Daniel H Rice
08:04 Apr-16-2006
Re: IR-192 for High Thickness
----------- Start Original Message -----------
: Did anybody used Ir-192 for steel thickness in the range of 76 mm weldment? If so can you pls tell me how good was the quality. If you have a special technique in this regard pls help me.
: regards
: Khaja
------------ End Original Message ------------
I have used IR192 in situations up to 3 inches of steel and stainless.
Exposure times increase tremendously, how ever you must consider that the "object" as described in astm E94 increases in thickness. To acheive a good films. Exposure, you must increase "Object to source" distance. faster films help but you loose contrast, i have used rare earth screens and Photo senstive films like the medical industry and .015 copper filters placed between the object and the film but not in contact with the film.Then placed a rare earth screen incontact with the film. Using this method i halfed the exposure time, and pulled .01t at a ug of .020in.
Experiment there are many products that can speed your exposure time and keep your quality high


    
 
 
John Brunk
Engineering, NDT Level III
Self employed, part-time, USA, Joined Oct 1999, 158

John Brunk

Engineering, NDT Level III
Self employed, part-time,
USA,
Joined Oct 1999
158
07:22 Apr-17-2006
Re: IR-192 for High Thickness
----------- Start Original Message -----------
: Did anybody used Ir-192 for steel thickness in the range of 76 mm weldment? If so can you pls tell me how good was the quality. If you have a special technique in this regard pls help me.
: regards
: Khaja
------------ End Original Message ------------

In my experience this is close to the upper limit for radiography with a 100 curie Ir-192 source. Exposure times can certainly be very long, and keeping the source and film stable can be a problem if there is a possibility of vibration or shocks in the area. However, both image sharpeness and contrast are notably better than with Co-60. If you are able to use solid-state radiography instead of film that will shorten the exposure time a lot. It is a good idea to perform ultrasonic examination in addition to radiography. I have had the experience of repairing a defect found during initial radiography with Co-60, then when the repair region was re-inspected finding additional defects with both Ir-192 and ultrasonic testing.



    
 
 

Product Spotlight

PROlineTOP Plug & Play Ultrasonic inspection device

As Plug & Play solution it units all control and operation elements in a small housing and therefo
...
re replaces the typical control cabinet...
>

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.
>

SITEX CPSERIES

Teledyne ICM’s CPSERIES has been designed with a view to revolutionizing the handling and perfor
...
mances of portable X-Ray sets. Despite having managed to halve the weight of similar portable X-Ray generators available on the market (while continuing to provide the same power output), the SITEX CPSERIES generators feature a shutter, a laser pointer, a beryllium window, an aluminum filter and two integrated diaphragms (customized sizes are available upon request). Without compromising the robustness and reliability for which ICM products are renowned, the small size and light weight of the SITEX CPSERIES will radically change the way that you perform your RT inspections. And you will see a positive impact in terms of both quality and return on investment (ROI).
>

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.
>

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