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 -

LECOEUR ELECTRONIQUE
The Specialist of electronics for ultrasonic testing.

894 views
Technical Discussions
Mike
Mike
07:32 Nov-25-2006
Exposure with Cobalt 60

Is a 16 curie colbalt source strong enough to shoot a 28" diameter 3" thick weld using a double wall exposure single wall viewing technique?


    
 
 
Anandam
Engineering, - DyGM - Operations & Reliability
Air Liquide India Limited, India, Joined Oct 2001, 13

Anandam

Engineering, - DyGM - Operations & Reliability
Air Liquide India Limited,
India,
Joined Oct 2001
13
07:04 Nov-26-2006
Re: Exposure with Cobalt 60
It hardly matter with the strength of the source as you need to give more exposure time. As far as the three inch double wall is concerned it can work as Cobalt 60 can penetrate up to 180 mm thick of steel. You can see the calculation chart for the same for particular film used.


----------- Start Original Message -----------
: Is a 16 curie colbalt source strong enough to shoot a 28" diameter 3" thick weld using a double wall exposure single wall viewing technique?
------------ End Original Message ------------




    
 
 
DJ Kallhof
DJ Kallhof
02:55 Nov-27-2006
Re: Exposure with Cobalt 60
You might want to check your Ug requirement before you attempt this time consuming endeavor. Unless your physical source size is .186" (4.7244mm) or less your geometric unsharpness will be over .020" (0.508mm). That low a power source will require a faster film and possibly salt screens which will decrease sensitivity. I would look to see if the customer thought ahead and installed a port for a "J" tube.
----------- Start Original Message -----------
: Is a 16 curie colbalt source strong enough to shoot a 28" diameter 3" thick weld using a double wall exposure single wall viewing technique?
------------ End Original Message ------------




    
 
 
DJ Kallhof
DJ Kallhof
03:16 Nov-27-2006
Re: Exposure with Cobalt 60
I must apologize. I knew I was wrong as soon as I closed the first reply. I calculated the total diameter rather than from the front face of the opposite wall. Your source size will have to be .166" (4.216mm) or less.
----------- Start Original Message -----------
: You might want to check your Ug requirement before you attempt this time consuming endeavor. Unless your physical source size is .186" (4.7244mm) or less your geometric unsharpness will be over .020" (0.508mm). That low a power source will require a faster film and possibly salt screens which will decrease sensitivity. I would look to see if the customer thought ahead and installed a port for a "J" tube.
: : Is a 16 curie colbalt source strong enough to shoot a 28" diameter 3" thick weld using a double wall exposure single wall viewing technique?
------------ End Original Message ------------




    
 
 

Product Spotlight

HD-CR 35 NDT Computed Radiography System

Portable high-resolution CR scanner for all radiography applications - weld testing, profile images
...
and aerospace. No matter what type of radiographic testing you are performing, the unique TreFoc Technology of the HD-CR 35 NDT imaging plate scanner always guarantees the highest image quality.
>

Magnetic X-Ray Pipeline Crawler

Zhong Yi brand pipeline crawler is magnetic/micro-video controlled crawler with DC X ray unit inst
...
alled for checking welding of pipeline. Move steadily inside the pipeline 6''-60''diameter with speed of up to 18m/min, Max. moving diatance 5 kilometers and provide the efficient inspection of the pipeline.
>

Echomac® PA Rail Wheel Tester

MAC introduces two versions of Rail Wheel Testers using ECHOMAC® PA platform based on customer requ
...
irements.
>

Trade-In Offer

We are offering our existing clients trade-in against Wavemaker® G3 systems, Standard (Blue) inflat
...
able rings and modules for excellent deals on the latest Wavemaker® G4mini system.
>

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
s