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3.10 ProperConnectionofPorts:Properphysicalinstal- and,therefore,extremecautionmustbeexercisedwhenwork- lationoftheHoseAssemblyrequiresacorrectlyinstalledport ingwithfluidsunderpressureandhandlingtheHosestrans- connectioninsuringthatnotwistortorqueistransferredto portingthefluids.Fromtimetotime,HoseAssemblieswill theHosewhentheFittingsarebeingtightenedorotherwise failiftheyarenotreplacedatpropertimeintervals.Usually duringuse. thesefailuresaretheresultofsomeformofmisapplication, 3.11 External Damage: Proper installation is not completeabuse,wear,orfailuretoperformpropermaintenance.When withoutinsuringthattensileloads,sideloads,kinking,flatten- Hosesfail,generallythehigh-pressurefluidsinsideescapein ing,potentialabrasion,threaddamage,ordamagetosealing astreamwhichmayormaynotbevisibletotheuser.Under surfacesarecorrectedoreliminated.Seeinstruction2.10. nocircumstancesshouldtheuserattempttolocatetheleak 3.12 SystemCheckout:Allairentrapmentmustbeelimi- by"feeling"withtheirhandsoranyotherpartoftheirbody. natedandthesystempressurizedtothemaximumsystem High-pressure fluids can and will penetrate the skin and pressure(atorbelowtheHosemaximumworkingpressure) causeseveretissuedamageandpossiblylossoflimb.Even and checked for proper function and freedom from leaks. seeminglyminorhydraulicfluidinjectioninjuriesmustbetreated Personnelmuststayoutofpotentialhazardousareaswhile immediatelybyaphysicianwithknowledgeofthetissuedam- testingandusing. agingpropertiesofhydraulicfluid. IfaHosefailureoccurs,immediatelyshutdowntheequip- 3.13 Routing: The Hose Assembly should be routed mentandleavetheareauntilpressurehasbeencompletely in such a manner so if a failure does occur, the escap- releasedfromtheHoseAssembly.Simplyshuttingdownthe ing media will not cause personal injury or property dam- hydraulicpumpmayormaynoteliminatethepressureinthe age. In addition, if fluid media comes in contact with hot HoseAssembly.Manytimescheckvalves,etc.,areemployed surfaces,openflame,orsparks,afireorexplosionmayoccur. in a system and can cause pressure to remain in a Hose Seesection2.4. Assemblyevenwhenpumpsorequipmentarenotoperating. 4.0 HOSEANDFITTINGMAINTENANCEAND TinyholesintheHose,commonlyknownaspinholes,can REPLACEMENTINSTRUCTIONS ejectsmall,dangerouslypowerfulbuthardtoseestreamsof 4.1 Evenwithproperselectionandinstallation,Hoselifemay hydraulicfluid.Itmaytakeseveralminutesorevenhoursfor besignificantlyreducedwithoutacontinuingmaintenancepro- thepressuretoberelievedsothattheHoseAssemblymay gram.Theseverityoftheapplication,riskpotentialfromapos- beexaminedsafely. sibleHosefailure,andexperiencewithanyHosefailuresinthe Once the pressure has been reduced to zero, the Hose applicationorinsimilarapplicationsshoulddeterminethefre- Assemblymaybetakenofftheequipmentandexamined.It quencyoftheinspectionandthereplacementfortheProducts must always be replaced if a failure has occurred. Never sothatProductsarereplacedbeforeanyfailureoccurs.A attempttopatchorrepairaHoseAssemblythathasfailed. maintenance program must be established and followed Consult the nearest Parker distributor or the appropriate by the user and, at minimum, must include instructions ParkerdivisionforHoseAssemblyreplacementinformation. 4.2through4.7. NevertouchorexamineafailedHoseAssemblyunlessitis 4.2 Visual Inspection Hose/Fitting: Any of the obviousthattheHosenolongercontainsfluidunderpres- followingconditionsrequireimmediateshutdownandreplace- sure.Thehigh-pressurefluidisextremelydangerousandcan mentoftheHoseAssembly: causeseriousandpotentiallyfatalinjury. � FittingslippageonHose, 4.7 Elastomericseals:Elastomericsealswilleventually � Damaged, cracked, cut or abraded cover (any rein- age,harden,wearanddeteriorateunderthermalcyclingand forcementexposed); compressionset.Elastomericsealsshouldbeinspectedand � Hard,stiff,heatcracked,orcharredHose; replaced. � Cracked,damaged,orbadlycorrodedFittings; 4.8 Refrigerant gases: Special care should be taken � LeaksatFittingorinHose; whenworkingwithrefrigerationsystems.Suddenescapeof � Kinked,crushed,flattenedortwistedHose;and refrigerantgasescancauseblindnessiftheescapinggases � Blistered,soft,degraded,orloosecover. contacttheeyeandcancausefreezingorothersevereinju- 4.3 VisualInspectionAllOther:Thefollowingitemsmust riesifitcontactsanyotherportionofthebody. betightened,repaired,correctedorreplacedasrequired: 4.9 Compressednaturalgas(CNG):ParkerCNGHose � Leakingportconditions; Assemblies should be tested after installation and before � Excessdirtbuildup; use,andatleastonamonthlybasisperAGA1-93Section � Wornclamps,guardsorshields;and 4.2"VisualInspectionHose/Fitting".Therecommendedpro- � Systemfluidlevel,fluidtype,andanyairentrapment. cedureistopressurizetheHoseandcheckforleaksandto 4.4 Functional Test: Operate the system at maximum visuallyinspecttheHosefordamage. operatingpressureandcheckforpossiblemalfunctionsand Caution:Matches,candles,openflameorothersourcesof leaks.Personnelmustavoidpotentialhazardousareaswhile ignitionshallnotbeusedforHoseinspection.Leakcheck testingandusingthesystem.Seesection2.2. solutionsshouldberinsedoffafteruse. 4.5 Replacement Intervals: Hose assemblies and elastomeric seals used on Hose Fittings and adapters HOSESafety&TechnicalData will eventually age, harden, wear and deteriorate under thermal cycling and compression set. Hose Assemblies andelastomericsealsshouldbeinspectedandreplacedat specificreplacementintervals,basedonpreviousservicelife, governmentorindustryrecommendations,orwhenfailures couldresultinunacceptabledowntime,damage,orinjuryrisk. Seesection1.2. 4.6 Hose Inspection and Failure: Hydraulic power is accomplished by utilizing high-pressure fluids to transfer energyanddowork.Hoses,Fittings,andHoseAssemblies allcontributetothisbytransmittingfluidsathighpressures. Fluidsunderpressurecanbedangerousandpotentiallylethal ParkerHannifinCorporation 199 IndustrialHoseProducts www.safehose.com
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