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Technical Discussions
Tiah Nam Kuan Paul
NDT Inspector
Singapore, Joined Jan 2000, 5

Tiah Nam Kuan Paul

NDT Inspector
Singapore,
Joined Jan 2000
5
04:02 Jan-04-2000
Beam spread


Is it required to do a check on beam spread periodically?


 
 Reply 
 
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
03:23 Jan-05-2000
Re: Beam spread
:
: Is it required to do a check on beam spread periodically?

Recalling the ASME Code, it was required when you were to size a flaw. Currently flaw sizing using Time of Flight (TOF) methods and Creeping Wave methods this is no longer required.

Generally, when using a dB drop flaw sizing method you tend to size the beam spread when the flaw is smaller than the beam spread.




 
 Reply 
 
andy cunningham
andy cunningham
05:13 Feb-16-2000
Re: Beam spread
: dont just read, think. sound will propagate through a medium as a hemisphere regardless of wavelength. the so called beam spread is the use of 3 angles of different intensities. tofd would not work if you think of sound as a beam. as i said before read think and understand. dont be mindless and regurgitate someone elses miscomprehension
does that answer your question (no)
yes do the checks to keep to the requirments 0f a quality system.
: Is it required to do a check on beam spread periodically?
all the best acc




 
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