Presentation - Static Electricity - Dirk Smith [Compatibility Mode].pdfVIP专享VIP免费原创优质

StaticElectricityHazardsandControlDirkSmith,PresidentIonixGasTechnologiesIonixGasTechnologies…makinggasdeliverysafer!WhoisIonixGasTechnologiesandwhyamIhere?•IGThasdevelopedasuiteofproductstoeliminatestaticinsideandoutsidePEpipe.•Becausewearecalledinwhenstaticincidentsoccur,wehaveindustryanecdotalhistorytodrawupon.IonixGasTechnologies…makinggasdeliverysafer!Goalsofthissession1.GainworkingunderstandingofstaticelectricityinPEgaspipe.2.Learntorecognizestaticignitionrisksinyourfieldoperations.3.Providebasisfordevelopment/evaluationofyourownstaticsuppressionproceduresbaseduponhowstaticoperatesandtheknownrisksingasO&Moperations.IonixGasTechnologies…makinggasdeliverysafer!IonixGasTechnologiesMakinggasdeliverysafer…ArticlepublishedinApril2011PipelineandGasJournalComparisonoffuelpipelinesincidentsthatrisetoNTSBincidentlevelComparedonlyIngroundrightofways–nobridges,insidebuildings,underwater,storagetanks1995–2010-15yearsofNTSBinvestigatedincidentsIonixGasTechnologiesMakinggasdeliverysafer…29incidents–15naturalgas–13hazfuel–1ammonia(Excl.11inbldg.)13LiquidFuelincidents–80%ofincidents–Ignitionrate–16%(1kwnigtn)3NaturalGaspipelineincidents–20%ofincidents–Ignitionrate–100%Thehighvisibilityofnatgasleaksduetofacttheyvirtuallyalwaysignite.Purposeoftoday’spresentationEliminatingignitionsofnaturalgasleakssinceamajorcauseoflifeandpropertylossThiskeyissueinfuturepipelinesafetyimprovementWhat’shappeningonthetransmissionleveloccurringatthedistributionlevel.ImagineiftherewerenonatgasexplosionsUnderlyingassumptionofcurrentpipelinesafety:Preventingleaksstopsignitionsthrough1.Damageprevention2.RegulationsofcodesandstandardsProblemwiththatassumption:LeaksstilloccurIntentional–duringrepairopsUnintentional–3rdpartydamage/randomandtheyignitebecauseofstatic2currentcomponentsofpipelinesafetyDamagepreventionLeakpreventionMetalpipecorrosionprotectionIsuggestthereisactuallya3rdcomponent:SuppressionofstaticRevisedcomprehensiveassumptionofpipelinesafety:PreventleaksANDSuppresstheignitionsourceby1.Damageprevention2.Regulatedcodesandstandards3.StaticsuppressionofignitionsourcesThiswillstopignitionsPart1ThebasicsofstaticelectricityWhatisstaticelectricity?Staticelectricityissocalledbecauseitisanelectricalchargeatrestbecauseitresidesonanelectricalinsulator.IonixGasTechnologies…makinggasdeliverysafer!HowstaticelectricityiscreatedFrictionofoneelectricalinsulatoragainstanotherdisplaceselectronswhichaccumulateononeofthesurfaces.IonixGasTechnologies…makinggasdeliverysafer!Mothernaturedoesn’tlikeelectricalimbalances.Thephysicalworldisintendedtobeatelectricalneutrality.MotherNaturewillremedytheproblemifyoudon’t.ArcingcaneitherigniteagaseousmixtureorshocktheworkerIonixGasTechnologies…makinggasdeliverysafer!Part2The4BasicsofStaticElectricityinPEpipeIonixGasTechnologies…makinggasdeliverysafer!#1–StaticstartsINSIDEpipeThemovementofgasinsidepipecreatesstaticontheinsidewallsofthepipe.Why?That’swherethefrictionis!ThisisthemostimportanttakeawaytodaybecauseitistherootcauseofALLstaticissuesyouencounter.IonixGasTechnologies…makinggasdeliverysafer!"WhenPEpipeischargedbydustorparticulateflowinginthegas(triboelectrification),chargeisgeneratedinitiallyintheinteriorofthepipe.”GasResearchInstitutereport92-0460-TechnicalPerspective,pageiv,line3IonixGasTechnologies…makinggasdeliverysafer!MeasuringstaticIon...