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Teletest
Teletest Focus+ was the first system to use long-range guided wave ultrasonic testing to detect corrosion in pipelines.
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Technical Discussions
muhammad rizwan
, NDT Technician
LONESTAR, Pakistan, Joined Dec 2013, 6

muhammad rizwan

, NDT Technician
LONESTAR,
Pakistan,
Joined Dec 2013
6
13:28 Jan-04-2014
about half value layer (HVL)

dear experts,
plz tell me about HVL and its use,
simply explain with example.
thanks in edvance,
regards,
m rizwan

 
 Reply 
 
anjafo
NDT Inspector
Norway, Joined Aug 2009, 204

anjafo

NDT Inspector
Norway,
Joined Aug 2009
204
21:46 Jan-04-2014
Re: about half value layer (HVL)
In Reply to muhammad rizwan at 13:28 Jan-04-2014 (Opening).

Quick research will yield better answers than this but basically different radiation sources penetrate materials differently. The HVL is how much of a given material is required to reduce the original intensity by a half.

So if you have an isotope with 40cu and the HVL for that isotope in steel was 20mm on the other side of that steel you would get 20cu.

Something like that but its well explained all over the net with accurate numbers etc.

1
 
 Reply 
 

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