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Service_.jpg
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AED 2000
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AEC Logo
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The AED-2000 is the first of our field-portable acoustic emission instruments. See more information at our instrumentation website at www.aeconsulting.com
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Acoustic Emission Consulting Logo
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AET 5500 system
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Acoustic Emission Waveguide
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Sensor and waveguide .JPG
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AET 5500 8-channel computerized acoustic emission data acquisition system used by AEC for online testing of high energy fossil piping.
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Stud-welded AE waveguide. Typically 1-ft long 1/4" 304 SS shank. Provides sound coupling and temperature isolation for the AE sensor.
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Field test engineer installing AE sensor in welded waveguide. An inert couplant, typically Dow high vacuum grease, is used to couple the sensor to the waveguide.
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Studwelding AE waveguides
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Brown 3 SH SEM Creep damage in…
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Early stage creep
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Studgun arrangement with special side-mount chuck fixture for studwelding of AE waveguides to high energy piping. Waveguides have been studwelded during offline and online conditions with good success.
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Acoustic Emission found activity during online conditions in SH link piping segments at Kentucky Utilities Brown #3 unit in 1997-98. One section was removed and investigated by EPRI. Sensitive phased array ultrasonics located indications in the area detected by AE monitoring. A 3" plug was sent to M&M Engineering (Austin, TX)for cryocracking analysis. This SEM photo at 5000x shows isolated early stage creep cavitation found in the weld centerline.
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Early stage creep damage in seam welds involves decohesion of inclusions and the growth of cavities around the decohered particles. Eventual linkage of these cavities leads to microcracking and eventual macrocracking.(After Henry, CE, unpublished, 1997)
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Creep microcracking, seam weld
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GRDA Coal Fired Complex
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Mohave 1985 HRH failure
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Micrograph of advanced creep microcracking in the fusion zone of a failed section of Sabine long seam bend
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Grand River Dam Authority Coal Fired Complex, Chouteau, OK. Power plants as art?!
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Mohave HRH piping failure, 1985
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Monroe 1986 HRH failure
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Mt. Storm 1996 SH pipe failure
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Hawthorne 5 failure (1).jpg
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Monroe HRH piping failure, 1986
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Mt. Storm SH link piping failure, 1996. A worker in the parking lot captured the steam expulsion through the roof of the plant.
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KCP&L Hawthorne 5 SH link piping failure, Aug 19 '98. Additional info under "Breaking News" file folder
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