ExpertWitnessandFireInvestigationDivision

JanetCottonIanMathesonPetraGress SandyMariaye

OurExpertWitnessTeam

DRJANETCOTTON

Metallurgy,Mater ialsEngineering,MechanicalFailure,Corrosion,Manufactur ing,Fabrication,

ProductPerformance

QUALIFICATIONSandEXPERIENCE

Qualifications:

• Bsc.Eng.(MaterialsEngineering)• PhD(MaterialsEngineering)UniversityofCapeTownMaterialScience• PrEng ECSA

Experience

• DirectorOneEighty(Pty)Ltd15years• LeadConsultingEngineer,FailureInvestigation,ProblemSolving,MaterialsSelection,ExpertWitness,BusinessOwner• LeadResearchandDevelopmentEngineerAdvancedMaterials

CASESTUDY1:OzoneGeneratorFailure

• OzoneGenerationisusedtoscrubfumesfromprocessplantstoremoveodours

• OzoneGeneratorisanarrayoftubescoatedwithathermallysprayedglasscoating

• Thetubesarepoweredwithhighvoltagesothatplasmaisproduced,whichchangesO2intoozone(O3)TheOzoneisusedtoscrubodours

• Ozonegeneratorfailed,byshortingout.• Rootcauseestablished:Thermalspraycoatingwasporous,allowingashort

• Betweenthesteeltubeswhenplasmawasproduced

• ClientwassuppliedwithnewOzoneGenerators

CASESTUDY1:OzoneGeneratorFailure

CASESTUDY2:MainEngineFailureWartsilla

• Bigendbearingfailure,fracturethroughtheconnectingrod• MainEnginesustainedirreparabledamage• Fracturesurfaceshowedevidenceoffatiguefailure,IEslowandinsidiouspropagationofacrackunderacyclicload• Oncethefatiguecrackpropagated,theconnectingrodfractureddamagingthemainengine• Failuremodeeffectanalysiswasappliedwiththemetallurgicalevidence• Therootcause:Torquesequencewasnotappliedtothebigendbolts

CASESTUDY2:MainEngineFailureWartsilla

CASESTUDY3:CorrosionofManufacturedItems

• Evaluatethecorrosivenatureofoilssuchasconventionalandbio-oilsformetallicmaterials.

• Understandthechemicaldifferencebetweenthedifferenttypesofoils.

• Calculatethedifferentexperimentalconditionsthatwouldallowonetoconductexperimentsoverashortperiodoftimetopredicttheeffectsofdifferentoilmediumonmetallicmaterialforasignificantamountoftime.

• Thedifferenceinchemicalnatureoftheoilprovedthatbio-oilsarecorrosivetometallicmaterial.

CASESTUDY3:CorrosionofManufacturedItems

CASESTUDY4:PastExperienceasExpertWitness

• MV“Azzure”– RudderFailure– BowmanGilfillan• MV“Lola”– StanchionFailure– ShepstoneWhiley• SeaHarvest– Corrosionfailurefirereticulationpipes– WebberWentzel Bowens• Oceana– BollardFailure– WebberWentzel Bowens• MV“Margeret”– TowRopeFailure– NortonRoseFullbright• CorrodedStructuralSteelinfertilizerfactory– MauricePhilippsWeisenberg

IANMATHESON

Fire/Explosion Investigation,Metallurgy,MechanicalFailure,Corrosion,Fabrication

QUALIFICATIONSandEXPERIENCE

Qualifications:

• B.Sc.MaterialsEngineering &M.Sc.MaterialsEngineering - UniversityofCapeTown• CharteredEngineer (C.Eng MIEI)- TheInstitutionofEngineersofIreland• EuropeanEngineer (Eur. Ing.)- EuropeanFederationofNationalEngineering Associations• FireScience&Investigation– UniversityofEdinburgh /IFE• PowderMetallurgyTechnologist Level1- AmericanPowderMetallurgyInstitute• MBA– UniversityofWarwick

Experience

• Overthepast18years,employment experiencein:• Mining toolsindustry (Boart Longyear)• Medicaldevices(Medtronic)• Forensicengineering investigations(fire&explosions), workplaceaccidents&metallurgical-relatedfailures(MCA&OneEighty)

CASESTUDY1:Fire&explosioninvestigations

CASESTUDY2:Mechanicalfailuresandstructuralcollapses

Fatalpalletrackingcollapse

CASESTUDY3:Metallurgical/Corrosionfailure

SANDYMARIAYE

Expertwitnessspecialising inchemistryandnon-metallicmater ials: Polymers,oils, paint, ceramicsand

composites.

QUALIFICATIONSandEXPERIENCE

Qualifications:

• BSc(Chemistry)• BSc(Hons)MaterialScience• MScMaterialsEngineeringUniversityofCapeTown

Experience

• ProductEngineerforResearchandDevelopmentfor4years• SeniorProjectmanagerforconsultingfor3years• Expertwitnesswork• Investigatefailure,materialselectionandprocessoptimisation.

CASESTUDY1:OilandGasIndustry– watercontaminationofoils

• Assesstheeffectsofwaterasacontaminantonthemetalliccomponentsaswellaschemicalpropertiesoftheoil.

• Determinethemaximumacceptablelevelofwaterthateverytypeofoilcancontainwithoutbeingdetrimentaltothesystemthattheyarepresentin.

• Experimentallydeterminethelevelofwaterindifferentoilsamples.• Comparetheoreticalandexperimentalresults.

• Determinepracticalwaysinwhichexcesswatercanberemoved.

CASESTUDY1:OilandGasIndustry– watercontaminationofoils

CASESTUDY2:FoodandBeverageIndustry– Bottleddrinksdiscolouration

• Regulartestingofpolymericmaterialandreverseengineeringofvariousmaterialsincludingcomposites.• Testingoflacquerinsidevodkacontainingbottles.• Determinethecauseforthechangeincolour offlavoured vodka.• Researchandexperimentsconductedprovedthattheadditivesaddedtomakethedifferentflavours reactedwiththelacquerandcauselacquerdisintegrationandchangeincolour.

CASESTUDY2:FoodandBeverageIndustry– Bottleddrinksdiscolouration

PastExperienceasanExpertWitness

• Forpaintcoatingsystem:Hadtodeterminetheeffectsofiron(III)oxideonadhesionpropertiesofalkydpaintsystem.

• Determinethedifferenceinadhesionproperties(intermsofchemicalandphysicalbonds)ofpaintcoatingsystemsonporousandnon-poroussubstrate.

• Severalscientificjournalswereanalysed andexperimentswereconductedtoexplainthedifferenceinbondingstrengthhenceadhesionpropertiesofpaintcoatingsonporousandnon-poroussubstrate.

PETRAGRESS

ExpertininternationalstandardsfortestingmetallicmaterialsandWeldProcedureQualifications,Predictionoflifespanofmaterials,MechanicalFailures,Optimisation ofprocesses,

Materialselection.

QUALIFICATIONSandEXPERIENCE

Qualifications:

• BTech - Mechanical Engineering(with distinction)- UNISA• NationalDiploma -Mechanical Engineering- CapePeninsulaUniversityof Technology• Bachelorof Arts- BusinessAdministration(Dualcertification course “Diplom-Betriebswirt“)- Universityof CooperativeEducationRavensburg,Germany• TechnicalSignatory for mechanical &metallurgical testing - SANAS

Experience

• ProjectManagement;3DCADDesign;Cold FormTechnology/Production Processes ;Fastening Technology

• Metallurgy ;MaterialsTesting (Tensile,Bend,Impact,Hardness tests,Chemicalcomposition,Microstructural Analysis)

• Stressanalysis incl.fatigue calculations;Various failure investigations

• Variousmaterialselection studies

• ScopingWeldProcedureQualifications and determination of requirements acc.to ASMEIX,AWSD1.1&D1.6,ISO15614-1,EMMUA158

• QualityManagment and Accreditation(ISO17025)

• Expertwitness work

• Intotalover 10years experience atMTU(Germany), Zumtobel Lighting (Austria),SFSintec (Switzerland),OneEighty (SouthAfrica)

CASESTUDY1:OilandGasIndustry– gearboxfailureonoilrig

Metallurgicalinvestigation,fracturesurfaceandstressanalysisconfirmedthatatorsionaloverloadwasappliedontotheshaft.

CASESTUDY2:SteelWorks– FailedHeaterPipe

CASESTUDY3:ExpertWitnessWork

Expertwitnessworkonqualityofwelding.