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- since 1996 -

Vallen-Systeme GmbH
The Acoustic Emission Company! Since 1987 Vallen stands for competence and continuity in AE and for reliable business cooperation and support.
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Technical Discussions
Philippe Rubbers
Engineering
SCM, South Africa, Joined Nov 1998, 22

Philippe Rubbers

Engineering
SCM,
South Africa,
Joined Nov 1998
22
08:28 Aug-11-1999
UT inspections of large castings and austenitic steel

What techniques are available to inspect (volumetric) coarse grain
material,such as castings and austenitic steels, with a thick cross
section? Examples where this material would be used is in the
primary loop of nuclear power stations, and in pipe work in the
petrochemical industry.

Thanks


 
 Reply 
 
jayesh.vanza
jayesh.vanza
07:53 Aug-11-1999
Re: UT inspections of large castings and austenitic steel
: What techniques are available to inspect (volumetric) coarse grain
: material,such as castings and austenitic steels, with a thick cross
: section? Examples where this material would be used is in the
: primary loop of nuclear power stations, and in pipe work in the
: petrochemical industry.

: Thanks




 
 Reply 
 
GAF
GAF
03:16 Aug-13-1999
Re: UT inspections of large castings and austenitic steel
: : What techniques are available to inspect (volumetric) coarse grain
: : material,such as castings and austenitic steels, with a thick cross
: : section? Examples where this material would be used is in the
: : primary loop of nuclear power stations, and in pipe work in the
: : petrochemical industry.

: : Thanks

Depends on the material and what type of inspection but in general Ultrasonic inspection of CSS components has been unreliable. Your best bet is a low freqency focused dual L wave 3/4 or 1 meg for crack detection



 
 Reply 
 
Norm Woodward
Norm Woodward
08:42 Aug-13-1999
Re: UT inspections of large castings and austenitic steel
: What techniques are available to inspect (volumetric) coarse grain
: material,such as castings and austenitic steels, with a thick cross
: section? Examples where this material would be used is in the
: primary loop of nuclear power stations, and in pipe work in the
: petrochemical industry.

I have no first hand experience with them, but Krautkramer, and a few others, were pushing "composite transducers" as a solution to inspecting noisy materials.

As I recall, this site had some on-line articles about them back in the fall of '96.

Hope this helps,

Norm


 
 Reply 
 
Russ Minkwitz
Russ Minkwitz
09:59 Aug-13-1999
Re: UT inspections of large castings and austenitic steel
: What techniques are available to inspect (volumetric) coarse grain
: material,such as castings and austenitic steels, with a thick cross
: section? Examples where this material would be used is in the
: primary loop of nuclear power stations, and in pipe work in the
: petrochemical industry.

Sir,

Dual element critically refracted longitudinal waves have been used for such applications for years. They are mentioned in IIW handbook on the examination of austenetic welds.

Further there are more detailed papers on dual element and tandem techniques published by RTD and Panametrics.

If you would like copies please provide you address and we will send more information.

Best Regards,
Russ Minkwitz
Manager, Transducer Sales





 
 Reply 
 
satish
satish
09:38 Oct-29-1999
Re: UT inspections of large castings and austenitic steel
: What techniques are available to inspect (volumetric) coarse grain
: material,such as castings and austenitic steels, with a thick cross
: section? Examples where this material would be used is in the
: primary loop of nuclear power stations, and in pipe work in the
: petrochemical industry.

: Thanks




 
 Reply 
 

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