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2.1.2 ElectricallyConductiveHose:Parkermanufacturers tationsoftheHose.Temperaturesbelowandabovetherec- specialHoseforcertainapplicationsthatrequireelectrically ommendedlimitcandegradeHosetoapointwhereafailure conductiveHose. mayoccurandreleasefluid.Properlyinsulateandprotect Parker manufactures special Hose for conveying paint in theHoseAssemblywhenroutingnearhotobjects(e.g.mani- airless paint spraying applications. This Hose is labeledfolds).DonotuseanyHoseinanyapplicationwherefailure "ElectricallyConductiveAirlessPaintSprayHose"onitslay- oftheHosecouldresultintheconveyedfluids(orvaporsor lineandpackaging.ThisHosemustbeproperlyconnected mist from the conveyed fluids) contacting any open flame, to the appropriate Parker Fittings and properly grounded moltenmetal,orotherpotentialfireignitionsourcethatcould inordertodissipatedangerousstaticchargebuildup,which causeburningorexplosionoftheconveyedfluidsorvapors. occursinallairlesspaintsprayingapplications.Donotuseany2.5 FluidCompatibility:HoseAssemblyselectionmust otherHoseforairlesspaintspraying,evenifelectricallycon- assurecompatibilityoftheHosetube,cover,reinforcement, ductive.UseofanyotherHoseorfailuretoproperlyconnect andFittingswiththefluidmediaused.Seethefluidcompat- theHosecancauseafireoranexplosionresultingindeath, ibilitychartintheParkerpublicationfortheproductbeingcon- personalinjury,andpropertydamage. sideredorused.Thisinformationisofferedonlyasaguide. Parker manufactures a special Hose for certain compressed Actualservicelifecanonlybedeterminedbytheenduserby natural gas ("CNG") applications where static electricity testingunderallextremeconditionsandotheranalysis. buildupmayoccur.ParkerCNGHoseassembliescomplywith Hosethatischemicallycompatiblewithaparticularfluidmust AGA Requirements 1-93, "Hoses for Natural GasVehicles beassembledusingFittingsandadapterscontaininglikewise and Fuel Dispensers". This Hose is labeled "Electrically compatibleseals. ConductiveforCNGUse"onitslaylineandpackaging.This 2.6 Permeation:Permeation(thatis,seepagethroughthe HosemustbeproperlyconnectedtotheappropriateParker Hose)willoccurfrominsidetheHosetooutsidewhenHose Fittingsandproperlygroundedinordertodissipatedanger- is used with gases, liquid and gas fuels, and refrigerants ousstaticchargebuildup,whichoccursin,forexample,high (includingbutnotlimitedtosuchmaterialsashelium,diesel velocityCNGdispensingortransfer.Donotuseanyother fuel, gasoline, natural gas, or LPG). This permeation may HoseforCNGapplicationswherestaticchargebuildupmay resultinhighconcentrationsofvaporswhicharepotentially occur,evenifelectricallyconductive.UseofotherHosesin flammable,explosive,ortoxic,andinlossoffluid.Dangerous CNGapplicationsorfailuretoproperlyconnectorgroundthis explosions,fires,andotherhazardscanresultwhenusing Hosecancauseafireoranexplosionresultingindeath,per- thewrongHoseforsuchapplications.Thesystemdesigner sonalinjury,andpropertydamage.Caremustalsobetaken musttakeintoaccountthefactthatthispermeationwilltake to protect against CNG permeation through the Hose wall. place and must not use Hose if this permeation could be Seesection2.6,Permeation,formoreinformation.Parker hazardous.Thesystemdesignermusttakeintoaccountall CNG Hose is intended for dispenser and vehicle use at a legal,government,insurance,oranyotherspecialregulations maximumtemperatureof180�F.ParkerCNGHoseshould whichgoverntheuseoffuelsandrefrigerants.Neverusea notbeusedinconfinedspacesorunventilatedareasorareas Hoseeventhoughthefluidcompatibilityisacceptablewithout exceeding180�F.Finalassembliesmustbetestedforleaks. considering the potential hazardous effects that can result CNGHoseAssembliesshouldbetestedonamonthlybasis frompermeationthroughtheHoseAssembly. forconductivityperAGA1-93. Permeation of moisture from outside the Hose to inside Parker manufacturers special Hose for aerospace in flight theHosewillalsooccurinHoseassemblies,regardlessof applications.AerospaceinflightapplicationsemployingHose internal pressure. If this moisture permeation would have totransmitfuel,lubricatingfluidsandhydraulicfluidsrequire detrimentaleffects(particularly,butnotlimitedtorefrigeration aspecialHosewithaconductiveinnertube.ThisHosefor andairconditioningsystems),incorporationofsufficientdrying inflightapplicationsisavailableonlyfromParker'sStratoflex capacityinthesystemorotherappropriatesystemsafeguards ProductsDivision.DonotuseanyotherParkerHoseforin shouldbeselectedandused. flightapplications,evenifelectricallyconductive.Useofother 2.7 Size: Transmission of power by means of pres- Hosesforinflightapplicationsorfailuretoproperlyconnect surized fluid varies with pressure and rate of flow. The orgroundthisHosecancauseafireoranexplosionresulting size of the components must be adequate to keep pres- indeath,personalinjury,andpropertydamage.TheseHose sure losses to a minimum and avoid damage due to heat assemblies for in flight applications must meet all applicable generationorexcessivefluidvelocity. aerospaceindustry,aircraftengine,andaircraftrequirements. 2.8 Routing:Attentionmustbegiventooptimumrouting 2.2 Pressure:Hoseselectionmustbemadesothatthe tominimizeinherentproblems(kinkingorflowrestrictiondue publishedmaximumrecommendedworkingpressureofthe toHosecollapse,twistingoftheHose,proximitytohotobjects Hoseisequaltoorgreaterthanthemaximumsystempressure. orheatsources). Surgepressuresorpeaktransientpressuresinthesystem 2.9 Environment:Caremustbetakentoinsurethatthe mustbebelowthepublishedmaximumworkingpressurefor HoseandFittingsareeithercompatiblewithorprotectedfrom theHose.Surgepressuresandpeakpressurescanusually the environment (that is, surrounding conditions) to which onlybedeterminedbysensitiveelectricalinstrumentationthat HOSESafety&TechnicalData theyareexposed.Environmentalconditionsincludingbutnot measures and indicates pressures at millisecond intervals. limitedtoultravioletradiation,sunlight,heat,ozone,moisture, Mechanical pressure gauges indicate only average pres- water,saltwater,chemicals,andairpollutantscancausedeg- suresandcannotbeusedtodeterminesurgepressuresor radationandprematurefailure. peaktransientpressures.Publishedburstpressureratings 2.10 Mechanical Loads: External forces can significantly forHoseisformanufacturingtestpurposesonlyandisno reduceHoselifeorcausefailure.Mechanicalloadswhich indicationthattheProductcanbeusedinapplicationsatthe must be considered include excessive flexing, twist, kink- burstpressureorotherwiseabovethepublishedmaximum ing,tensileorsideloads,bendradius,andvibration.Useof recommendedworkingpressure. swiveltypeFittingsoradaptersmayberequiredtoinsureno 2.3 Suction:Hosesusedforsuctionapplicationsmustbe twistisputintotheHose.Unusualapplicationsmayrequire selectedtoinsurethattheHosewillwithstandthevacuum specialtestingpriortoHoseselection. andpressureofthesystem.ImproperlyselectedHosemay 2.11 Physical Damage: Care must be taken to protect collapseinsuctionapplication. Hose from wear, snagging, kinking, bending smaller that 2.4 Temperature:Becertainthatfluidandambienttem- minimumbendradius,andcutting,anyofwhichcancause peratures,bothsteadyandtransient,donotexceedthelimi- ParkerHannifinCorporation 197 IndustrialHoseProducts www.safehose.com
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