1、A Referencenumbe r ISO11759:1999 (E) INTERNATIONAL STANDARD ISO 11759 Firstedition 19990715 Rubberhosesandhoseassembliesfor dispensingliquefiedpetroleumgases (LPGs)Specification Tuyauxetflexiblesencaoutchoucdestinslafournituredegazdeptrole liqufis(GPL)SpcificationsISO11759:1999(E) ISO1999 Allrightsr
2、eserved.Unlessotherwisespecified,nopartofthispublicationmaybereproducedorutilizedinanyformorbyan ymeans,electronic ormechanical,includingphotocopyingandmicrofilm,withoutpermissioninwritingfromthepublisher. InternationalOrganizationforStandardization Casepostale56 CH1211Genve20 Switzerland Internet i
3、soiso.ch PrintedinSwitzerland ii Foreword ISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodies(ISO memberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechnical committees.Eachmemberbodyinterestedinasubjectforwhichatechnic
4、alcommitteehasbeenestablishedhas therighttoberepresentedonthatcommittee.Internationalorganizations,governmentalandnongovernmental,in liaisonwithISO,alsotakepartinthework.ISOcollaboratescloselywiththeInternationalElectrotechnical Commission(IEC)onallmattersofelectrotechnicalstandardization. Internati
5、onalStandardsaredraftedinaccordancewiththerulesgivenintheISO/IECDirectives,Part3. DraftInternationalStandardsadoptedbythetechnicalcommitteesarecirculatedtothememberbodiesforvoting. PublicationasanInternationalStandardrequiresapprovalbyatleast75%ofthememberbodiescastingavote. InternationalStandardISO
6、11759waspreparedbyTechnicalCommitteeISO/TC45, Rubberandrubberproducts , SubcommitteeSC1, Hoses(rubberandplastics) . AnnexAformsanormativepartofthisInternationalStandard.INTERNATIONALSTANDARD ISO ISO11759:1999(E) 1 Rubberhosesandhoseassembliesfordispensing liquefiedpetroleumgases(LPGs)Specification W
7、ARNINGPersonsusingthisInternationalStandardshouldbefamiliarwithnormallaboratorypractice. Thisstandarddoesnotpurporttoaddressallofthesafetyproblems,ifany,associatedwithitsuse.Itis theresponsibilityoftheusertoestablishappropriatesafetyandhealthpracticesandtoensurecompliance withanynationalregulatoryco
8、nditions. 1Scope ThisInternationalStandardspecifiestherequirementsforflexiblerubberhosesandhoseassembliesusedforthe transferofmeteredquantitiesofliquifiedpetroleumgases(LPGs)fromdispensingequipmenttomotorvehicles. ThehosesandhoseassembliesspecifiedinthisInternationalStandardareintendedforuse“wet”,i.
9、e.permanently filledwithliquid,inthetemperaturerangefrom40Cto+60C. Themaximumworkingpressureis20bar(2MPa). 2Normative references Thefollowingnormativedocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsof thisInternationalStandard.Fordatedreferences,subsequentamendmentsto,
10、orrevisionsof,anyofthese publicationsdonotapply.However,partiestoagreementsbasedonthisInternationalStandardareencouragedto investigatethepossibilityofapplyingthemostrecenteditionsofthenormativedocumentsindicatedbelow.For undatedreferences,thelatesteditionofthenormativedocumentreferredtoapplies.Membe
11、rsofISOandIEC maintainregistersofcurrentlyvalidInternationalStandards. ISO37:1994, Rubber,vulcanizedorthermoplasticDeterminationoftensilestressstrainproperties. ISO188:1998, Rubber,vulcanizedorthermoplasticAcceleratedageingandheatresistancetests. ISO1307:1992,Rubberandplasticshosesforgeneralpurposei
12、ndustrialapplicationsBorediametersand tolerances,andtolerancesonlength. ISO1402:1994, RubberandplasticshosesandhoseassembliesHydrostatictesting. ISO1746:1998, RubberorplasticshosesandtubingBendingtests. ISO1817:1999, Rubber,vulcanizedDeterminationoftheeffectofliquids. ISO4080:1991, Rubberandplastics
13、hosesandhoseassembliesDeterminationofpermeabilitytogas. ISO4672:1997, RubberandplasticshosesSubambienttemperatureflexibilitytests. ISO6801:1983, RubberorplasticshosesDeterminationofvolumetricexpansion. ISO7326:1991, RubberandplasticshosesAssessmentofozoneresistanceunderstaticconditions.ISO11759:1999
14、(E) ISO 2 ISO8031:1993, RubberandplasticshosesandhoseassembliesDeterminationofelectricalresistance. ISO8033:1991, RubberandplasticshosesDeterminationofadhesionbetweencomponents. ISO8330:1998, RubberandplasticshosesandhoseassembliesVocabulary. 3 Termsanddefinitions ForthepurposesofthisInternationalSt
15、andard,thetermsanddefinitionsinISO8330:1998apply. 4Classification Twotypesofhosearespecified,asfollows: Type1: Hoseswithtextilereinforcement,incorporatingametallicbondingelement,suitableforreelingona drumordrapinginasingleloop. Type2: Hoseswithafinewirereinforcement,suitableforreelingonadrumordrapin
16、ginasingleloop. 5 Materialsandconstruction Hosesshallconsistofthefollowing: asmooth,fuelresistantliningofrubber; oneormorelayersoftextileorcorrosionresistantwires,forexamplestainlesssteelortinnedcopper; anelectricallyconductiveelement(Type1)typicallyconsistingofnotlessthantwobondingwiresofabraided c
17、onstructioneachcontainingaminimumofninestrandsofcorrosionresistantmetal; anabrasionandweatherresistantrubbercover. Thehosecovercanbeprickedtoreleasetrappedgases. 6Hydrostatic requirements WhenthehoseorhoseassemblyistestedinaccordancewithISO1402,thepressureratingshallcomplywiththe valuesgiveninTable1
18、. Table1Pressureratings Property Pressurerating bar a Maximumworkingpressure 20 Prooftestpressure 40 Minimumburstpressure 100 a 1bar=0,1MPaISO ISO11759:1999(E) 3 7 Dimensionsandtolerances 7.1 WhenmeasuredbythemethoddescribedinISO4671,theinternalandoutsidediametersofthehoseshall complywiththedimensio
19、nsandtolerancesgiveninTable2. 7.2 ThetolerancesoncutlengthsshallbeasspecifiedinISO1307. Table2Nominalboreandinternalandoutsidediametersandtolerances Nominalbore Internaldiameter mm Tolerance mm Outsidediameter mm Tolerance mm 16 16 0,8 26 1,0 19 19 0,8 29 1,0 20 20 0,8 30 1,0 25 25 1,25 35 1,25 7.3
20、Liningandcoverthickness WhenmeasuredbythemethoddescribedinISO4671,theminimumthicknessoftheliningshallbe1,6mmand thatofthecover1,0mm. 8 Physicalpropertiesofmaterials ThevaluesofphysicalpropertiesofthematerialsusedforthemanufactureofhosesshallbeasgiveninTable3. Table3Physicalpropertiesofmaterials Prop
21、erty Unit Requirement Testpiece Methodoftest Tensilestrength Testpiececutfrom hoseorfromtest sheet ISO37type1or type2dumbbell Lining min. MPa 7 Covermin.MPa 7 Elongationatbreak Testpiececutfrom hoseorfromtest sheet ISO37type1or type2dumbbell Lining min. % 250 Cover min. % 250 Acceleratedageing: chan
22、geforliningandcover Testpiececutfrom hoseorfromtest sheet ISO188:72hat 100C Tensilestrength max. % 25 Elongationatbreak max. % 50 Resistanceofliningtoliquids: changeintensilestrength andelongationatbreak Notlessthan 65%oforiginal values Testpiececutfrom hoseliningorfrom testsheet ISO1817:72hat 23C,i
23、mmersionin nhexaneISO11759:1999(E) ISO 4 9 Performancerequirementsforhoses/hoseassemblies Thevaluesofphysicalpropertiesofhoses/hoseassembliesshallbeasgiveninTable4. Table4Physicalpropertiesofhoses/hoseassemblies Property Unit Requirement Testpiece Methodoftest Prooftestpressure Noleakageorother sign
24、sofweakness Fulllengthof hoseorhose assembly ISO1402 Burstpressure min. bar 100 Shortlengthcut fromhose ISO1402 Changeinlengthatproof pressure max. % 7 Hydrostatic prooftestpiece cutfromhose ISO1402 Volumetricexpansion max. % +6 Testpiececut fromhose ISO6801:test pressure10bar Flexibilityatambient t
25、emperature T/D 0,8 Shortlengthcut fromhose ISO1746:1998, methodA,using10 theinternaldiameter asthevaluefor diameter C Lowtemperatureflexibility Nocracksor breaks Shortlengthcut fromhose ISO1746:1998, methodB,40C Ozoneresistanceofcover Nocracksunder 2magnification Shortlengthcut fromhose ISO7326:1991
26、, method1 Abrasionresistanceofcover g ,1g Shortlengthcut fromhose ISO6945:vertical force50N 0,5N Adhesionbetween components min. kN/m 2 Shortlengthcut fromhose ISO8033 Electricalcontinuityor resistanceofhoseorhose assembly(fittingtofitting) W/m Notmorethan 10 W/mor 10 W/assembly Lengthofhose orhose
27、assembly ISO8031 Flexibilitytestunderreverse bending 50000cycles,no failureorincrease inelectrical resistancetoa valuehigherthan thatspecified Hoseassembly AnnexA LPGpermeability max cm 3 /(m h) 400 Shortlengthcut fromhose ISO4080 10Marking Hosesshallbeclearlyanddurablymarked,atleasteverymetre,witha
28、tleastthefollowinginformation: a) themanufacturersnameoridentification; b) themanufacturersproductidentification(optional);ISO ISO11759:1999(E) 5 c) thenumberofthisInternationalStandard; d) thetypeofhose; e) thenominalbore; f) themaximumworkingpressure,inbars; g) forhosesthequarterandyearofmanufactu
29、reandforassembliesthedateofassembly(e.g.3Q98). EXAMPLEManISO11759Type116203Q98 11 Frequencyoftesting ThefrequencyoftestingshallbeinaccordancewiththerequirementsgiveninTable5. Table5Frequencyoftesting Testtype Approvaltests a Production/routine tests b Compoundtests Tensilestrength x N.A. Elongationa
30、tbreak x N.A. Acceleratedageing:tensile x N.A. Acceleratedageing:elongation x N.A. Hosetests Tube/coverthickness x N.A. Internal/outsidediameters x x Proofpressure x x Burstpressure x N.A. Changeinlengthatproofpressure x N.A. Volumetricexpansion x N.A. Flexibilityatlowtemperature x N.A. Ozoneresista
31、nceofcover x N.A. Adhesiontests x N.A. Resistanceofliningtoliquids x N.A. Electricalcontinuity x x LPGpermeability x N.A. Assemblytests Electricalcontinuity x x Flexibilityunderreversebending x N.A. Proofpressure x x a Approvaltestsarethosetestsrequiredforapprovalandconsistoffullteststhatshallbecarr
32、iedoutonall boresizesandrepeatedatleastevery3years. b Production/routinetestsarecarriedoutoneverylengthofhose/everyassemblyproduced. x Testtobecarriedout N.A. NotapplicableISO11759:1999(E) ISO 6 AnnexA (normative) Flexibilitytestunderreversebending(flextest) A.1Apparatusandtestspecimen Thetestrigsha
33、llbeinaccordancewithFigureA.1. Iffoundnecessary,thedeadweightmaybeguidedtopreventitswinging. Thelengthofthehoseassemblyshallbeapproximately1m. A.2Procedure A.2.1 FitthehoseassemblytothetestrigasshowninFigureA.1. A.2.2 Attachadeadweighthavingamassof5kgtothefreeendoftheassembly. A.2.3 Usingwaterasthet
34、estmedium,filltherigandassemblytoremoveallairandapplyapressureof2bar. A.2.4 Movethetestrigtoandfroatroomtemperature,therebyflexingthehosethrough180relativetothe coupling.Onecompletecycleistworotationsthrough180. A.2.5 Theminimumflexingrateshallbetwocompletecyclesperminute. A.2.6 Thenumberofcyclesspe
35、cifiedshallbecompleted(unlessfailureoccurspriortocompletionofthetest). A.3Testreport Thetestreportshallincludethefollowinginformation: a) thenumberofcyclesachieved; b) anyleakagebetweenthehoseandtheendfitting; c) anyvisibledamage,suchassplittingofthehosecover,bubblingofthecover,orseparationofthecove
36、r, reinforcingpliesorlining; d) anylooseningormovementoftheendfittingfromthehose; e) anydeviationoutsidethemaximumpermissibleelectricalresistance.ISO ISO11759:1999(E) 7 Key 1Pressure 2Hoseassembly 35kgdeadweight FigureA.1TestrigforflexibilitytestunderreversebendingISO11759:1999(E) ISO ICS75200;8314040 Pricebasedon7pages
