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925 views
04:52 Aug-24-1999

Dr Steve Burch

R & D
AEA Technology plc,
United Kingdom,
Joined Oct 1999
1
Long range pulse-echo UT

We are looking at a NDT problem which probably needs very
long range (>5m) ultrasonic pulse-echo inspection in mild steel
components, using zero degree beams.

To keep the attenuation low we need to use as low a frequency as possible
(c. 0.5 - 2 MHz), but we then have a problem with high beamwidths
as the largest "standard" probes seem to be generally around 40mm
in diameter.

Does anyone know whether larger probes, including phased arrays,
or even axicon type probes are commercially available, and if so
from where? (They would need to be low frequency and capable of
long range operation).

Any info. gratefully received.

Dr Steve Burch

AEA Technology plc
Culham Science Centre
Oxon
UK

e:mail: steve.burch@aeat.co.uk



 
05:11 Aug-24-1999
Chris Edwards
Re: Long range pulse-echo UT : We are looking at a NDT problem which probably needs very
: long range (>5m) ultrasonic pulse-echo inspection in mild steel
: components, using zero degree beams.

Steve,

We could probably boost the performance of standard longitudinal transducers @5MHz
with low noise amplification to cover this type of distance.

:
:
: Dr Chris Edwards
: Unit for NonContact Ultrasound
:Dept of Physics
:University Of Warwick
:Coventry
:CV4 7Al
: tel 01203 572942
: fax 01203 692016

: AEA Technology plc
: Culham Science Centre
: Oxon
: UK

: e:mail: steve.burch@aeat.co.uk




 
06:36 Aug-24-1999
jan
Re: Long range pulse-echo UT : We are looking at a NDT problem which probably needs very
: long range (>5m) ultrasonic pulse-echo inspection in mild steel
: components, using zero degree beams.
:
: To keep the attenuation low we need to use as low a frequency as possible
: (c. 0.5 - 2 MHz), but we then have a problem with high beamwidths
: as the largest "standard" probes seem to be generally around 40mm
: in diameter.

: Does anyone know whether larger probes, including phased arrays,
: or even axicon type probes are commercially available, and if so
: from where? (They would need to be low frequency and capable of
: long range operation).

: Any info. gratefully received.

: Dr Steve Burch

: AEA Technology plc
: Culham Science Centre
: Oxon
: UK

: e:mail: steve.burch@aeat.co.uk

Steve,

we have tested steel shafts 500 inches ( 12.5 meters)
long, using Sonatest UFD 7A @ frequency of 1-2.25 MHz.
They are in Milton Keynes.

Good luck,
Jan


 
06:49 Aug-24-1999

Joe Buckley

Consultant, ASNT L-III, Honorary Secretary of BINDT
Level X NDT, BINDT,
United Kingdom,
Joined Oct 1999
509
Re: Long range pulse-echo UT We now have the Powerscan 400
(info not yet on our web page (www.sonatest-plc.com, but we're working on it)

This is an identical package to our exiting Digital Flaw Detectors, but has a High Energy pulser and filters etc. optimised for applications such as shaft inspection.

Contact me direct if you'd like more information

Joe

: : e:mail: steve.burch@aeat.co.uk

: Steve,

: we have tested steel shafts 500 inches ( 12.5 meters)
: long, using Sonatest UFD 7A @ frequency of 1-2.25 MHz.
: They are in Milton Keynes.

: Good luck,
: Jan




 
02:21 Dec-23-1999
Eng. Fathi Ghanameh
Re: Long range pulse-echo UT : We are looking at a NDT problem which probably needs very
: long range (>5m) ultrasonic pulse-echo inspection in mild steel
: components, using zero degree beams.
:
: To keep the attenuation low we need to use as low a frequency as possible
: (c. 0.5 - 2 MHz), but we then have a problem with high beamwidths
: as the largest "standard" probes seem to be generally around 40mm
: in diameter.

: Does anyone know whether larger probes, including phased arrays,
: or even axicon type probes are commercially available, and if so
: from where? (They would need to be low frequency and capable of
: long range operation).

: Any info. gratefully received.

: Dr Steve Burch

: AEA Technology plc
: Culham Science Centre
: Oxon
: UK

: e:mail: steve.burch@aeat.co.uk




 


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