TULA - GB Inspection Systems Ltd Short... · • TULA™ approach has been proven to a very simple...
Transcript of TULA - GB Inspection Systems Ltd Short... · • TULA™ approach has been proven to a very simple...
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1 © 2018 Lavender International NDT USA, LLC. All rights reserved
TULA TECHNIQUEINNOVATION TO SOLUTION
Tim Armitt: Lavender InternationalDavid Miller: Lavender International
Innovation, Application, Validation & SolutionThe Complete NDT Inspection Support Organisation
™
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2 © 2018 Lavender International NDT USA, LLC. All rights reserved
• TOFD found to be most reliable at detecting early stage HTHA
• Conventional TOFD approach extremely useful on welds
• Conventional TOFD limited by large PCS values on thick material
• Lateral wave dead zone another limitation
TULA INSPIRATION
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3 © 2018 Lavender International NDT USA, LLC. All rights reserved
• Innovative solution needed• TULA™: TOFD Ultra Low Angle • TULA™ originally developed by
carving up standard TOFD wedges to produce extremely low refracted angles
• Prototypes were developed in partnership with GB Inspection Systems Ltd.
• TULA™ series made including a new angle beam series to be launched later this year.
INNOVATION
TULA™ patent pending all rights reserved
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4 © 2017 Lavender International NDT USA, LLC. All rights reserved
VALIDATION
Blind Flange Section
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5 © 2017 Lavender International NDT USA, LLC. All rights reserved
BLIND FLANGE TULA™ : SAMPLE Z1
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BLIND FLANGE SUMMARY: SAMPLE Z1
Velocity RatioAttenuationSpectral FrequencyAUBTPAUTTOFDTFMTULA
No HTHAIndicative of HTHAIndicative of HTHAIndicative of HTHAIndicative of HTHAIndicative of HTHAIndicative of HTHAIndicative of HTHA
Metallography: Colony of HTHA
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BLIND FLANGE SAMPLE Z1: METALLOGRAPHY
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8 © 2017 Lavender International NDT USA, LLC. All rights reserved
ASSESSMENT OF PARENT PLATE: TULA™ C
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9 © 2017 Lavender International NDT USA, LLC. All rights reserved
JIP PHASE 1 SAMPLE W: TULA™ C
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ASSESSMENT OF PARENT PLATE: SUMMARY
Velocity RatioAttenuationSpectral FrequencyAUBTPAUTTOFDTFMTULA
Indicative of HTHAIndicative of HTHAIndicative of HTHAIndicative of HTHAIsolated indicationsLocalised inclusionsIsolated indicationsLocalised inclusions
Metallography: Not HTHA
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ASSESSMENT OF PARENT PLATE: METALLOGRAPHY
Original steelmaking inclusions
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HYDROGEN INDUCED COLD CRACKING: HICC
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HICC: TULA™ C IMAGE
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14 © 2017 Lavender International NDT USA, LLC. All rights reserved
TUBE PLATE SAMPLE: TULA™ A
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TUBE PLATE SAMPLE: TULA™ A IMAGES
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TUBE PLATE SAMPLE: SUMMARY
Velocity RatioAttenuationSpectral FrequencyAUBTPAUTTOFDTULA
Isolated points of HTHA Indicative of HTHA Indicative of HTHA Indicative of HTHA Indicative of HTHA Indicative of HTHA Indicative of HTHA
Metallography: Colony of HTHA
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17 © 2017 Lavender International NDT USA, LLC. All rights reserved
TUBE PLATE SAMPLE: MICRO VALIDATING NDE
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HEAT EXCHANGER SKID BAR ATTACHMENT WELD TO SHELL HAZ
Crack top tips visible full length of can 3
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HEAT EXCHANGER SKID BAR: TULA™ B
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HEAT EXCHANGER SKID BAR HTHA CRACKING
Colony of micro cracksTip of 3mm HTHA crack
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HEAT EXCHANGER SKID BAR ATTACHMENT WELD TO SHELL HAZ
NDT validated by metallography
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CHANNEL SECTION: TULA™ A (OD) & C (ID)
Sample removed for sectioning
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23 © 2015 E2G | The Equity Engineering Group, Inc. All rights reserved
SURFACE / BULK DECARBURIZATION• Complete decarburization (left)• Partial decarb (right)
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REDUCED TOUGHNESS DUE TO HTHA
Charpy samples fail outside notch
Samples have failed at only 2 Joules
Decarburization and voiding attributed to these sobering low impact results
Early stages of voiding and decarb are not detectable with NDE
Bulk decarb and extensive voiding has been detected by NDE
NDE has been proven to detect small colonies of microcracks
(4 C)
(65 C)
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OD NOZZLE SECTION: TULA™ A (OD)
HTHA detected using 10MHz TULA probe, infinity focus, imaging very fine damage
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ID NOZZLE SECTION: TULA™ C (ID)
HTHA detected best from ID using focussed TULA probe
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VALIDATION OF TULA™ INDICATIONS
Small manganese sulphide inclusions surrounded by incipient HTHA damage (methane voids)
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SEM RESULTS
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29 © 2018 Lavender International NDT USA, LLC. All rights reserved
• TULA™ approach has been proven to a very simple but highly sensitive means of detecting HTHA
• TULA™ scan speed far exceeds PAUT & TFM• TULA™ probes with specific focal depths
are required to optimise detection throughout a range of thickness
• TULA concept has also been applied to angle beam probes for the purpose of detecting HTHA in weld HAZ regions
• Operator training is essential for choice of parameters, equipment set-up and reliable data analysis
• HTHA training courses are available and proven to be a great success
SUMMARY
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30 © 2018 Lavender International NDT USA, LLC. All rights reserved
Innovation, design and solutions: Lavender International NDT Ltd.+44-1226-765-769
Probe design and build:GB Inspection Systems+44 121-351-5025
Scanner design and build:Jireh Industries Houston+1-832-564-0626
JIP Manager & Materials ExpertsEquity Engineering IncMike Nugent +1-201-446-6693
ACKNOWLEDGEMENTS
TULA™ patent pending all rights reserved
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QUESTIONS?
Innovation, Application, Validation & SolutionThe Complete NDT Inspection Support Organisation