1、A Referencenumbe r ISO7511:1999 (E) INTERNATIONAL STANDARD ISO 7511 Firstedition 19990315 PlasticspipingsystemsGlassreinforced thermosettingplastics(GRP)pipesand fittingsTestmethodstoprovethe leaktightnessofthewallundershortterm internalpressure SystmesdecanalisationsenplastiquesTubesetraccordsen pl
2、astiquesthermodurcissablesrenforcsdeverre(PRV)Mthode dessaipourtablirltanchitdelaparoisousunepressioninterne courttermeISO7511:1999(E) ISO1999 Allrightsreserved.Unlessotherwisespecified,nopartofthispublicationmaybereproducedorutilizedinanyformorbyan ymeans,electronic ormechanical,includingphotocopyi
3、ngandmicrofilm,withoutpermissioninwritingfromthepublisher. InternationalOrganizationforStandardization Casepostale56 CH1211Genve20 Switzerland Internet isoiso.ch PrintedinSwitzerland ii Contents Page 1Scope 1 2Termanddefinition .1 3MethodA. 1 3.1Principle .1 3.2Apparatus 1 3.3Testpieces 2 3.4Procedu
4、re 2 3.5Testreport .2 4MethodB. 3 4.1Principle .3 4.2Apparatus 3 4.3Testpieces 3 4.4Procedure 3 4.5Testreport .3ISO ISO7511:1999(E) iii Foreword ISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodies(ISO memberbodies).TheworkofpreparingInternationalStandar
5、dsisnormallycarriedoutthroughISOtechnical committees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhas therighttoberepresentedonthatcommittee.Internationalorganizations,governmentalandnongovernmental,in liaisonwithISO,alsotakepartinthework.ISOcollaboratescloselywitht
6、heInternationalElectrotechnical Commission(IEC)onallmattersofelectrotechnicalstandardization. InternationalStandardsaredraftedinaccordancewiththerulesgivenintheISO/IECDirectives,Part3. DraftInternationalStandardsadoptedbythetechnicalcommitteesarecirculatedtothememberbodiesforvoting. PublicationasanI
7、nternationalStandardrequiresapprovalbyatleast75%ofthememberbodiescastingavote. InternationalStandardISO7511waspreparedbyTechnicalCommitteeISO/TC138, Plasticspipes,fittingsand valvesforthetransportoffluids ,SubcommitteeSC6, Reinforcedplasticspipesandfittingsforallapplications, in collaborationwithCEN
8、/TC155, Plasticspipingsystemsandductingsystems .INTERNATIONALSTANDARD ISO ISO7511:1999(E) 1 PlasticspipingsystemsGlassreinforcedthermosettingplastics (GRP)pipesandfittingsTestmethodstoprovethe leaktightnessofthewallundershortterminternalpressure 1Scope ThisInternationalStandardspecifiestwotestmethod
9、s,designatedmethodAandmethodB,forcheckingthe leaktightnessofglassreinforcedthermosettingplastics(GRP)pipesandfittingsundershortterminternalpressure. MethodAisahydraulictestapplicabletoapipeunderuniaxialstress. MethodBisapneumatictestapplicabletofittings. NOTE Testmethodsfortheleaktightnessofjointsor
10、fortheresistanceofthepipetolongtermhydrostaticpressureare coveredbyotherstandards. 2Termanddefinition ForthepurposesofthisInternationalStandard,thefollowingdefinitionapplies: 2.1 leakage transmissionofwaterorairthroughthewallofatestpiecetoanextentdetectablevisually 3MethodA 3.1Principle Atestpiecein
11、airissubjectedtoaninternalwaterpressure.Thetestpieceismonitoredforevidenceofleakage throughthewallofthetestpiece,withinaspecifiedtime. NOTE Itisassumedthatthefollowingtestparametersaresetbythestandardmakingreferencetothisstandard: a) thetestpressureandthetimetakentoreachit(see3.2.1and3.4.2); b) then
12、umberoftestpiecestobeused(see3.3); c) theperiodforwhichpressureisapplied(see3.4.3); d)the length Lofthetestpiece. 3.2Apparatus 3.2.1Pressurizing system, capableofmaintaining,forthedurationofthetest,aspecifiedhydraulicpressure measuredatthetopofthetestpiecetoanaccuracywithin2%and+5%. 3.2.2Pressuremea
13、suringdevice, ofsufficientaccuracytoensureconformityto3.2.1.ISO7511:1999(E) ISO 2 3.2.3Endsealingdevices, suchasendcaps,internalstoppersorinflatablebags,dependingonthediameterof thetestpiece.Meansshallbeprovidedtopreventmovementofthesealingdeviceunderpressure.Suchdevices shallnottransmitendthrusttot
14、hetestpiece. 3.2.4Testpiecesupport, ifnecessary,tominimizedeformationofthetestpieceduetoitsmassanditscontents. Thissupportshallnotconstrainthetestpiececircumferentiallyorlongitudinally. 3.3Testpieces 3.3.1 Eachtestpieceshallcomprisealengthofpipeasspecifiedinthereferringstandard. 3.3.2 Thenumberoftes
15、tpiecesshallbeasspecifiedinthereferringstandard. 3.4Procedure WARNINGAttentionisdrawntothedangersassociatedwithpressureandtheneedtotakeallnecessary precautionstopreventinjurytopersonnel. 3.4.1 Attachtheendsealingdevicestothetestpieceandfillthetestpiecewithwater,expellingallair.Attachthe testpiecetot
16、hepressurizingsystem,takingcaretoavoidentrapmentofair. 3.4.2 Increasethehydrostaticpressureataratesuchthatthespecifiedtestpressureisreachedinthetime specifiedinthereferringstandard. 3.4.3 Maintainthethetestpressureforthetimespecifiedinthereferringstandardoruntilleakageisobserved(see 2.1),whicheveroc
17、cursfirst.Recordanyevidenceofleakagethroughthewallofthetestpiece(see3.1and3.2.1) andtheperiodafterwhichitwasobserved. 3.5Testreport Thetestreportshallincludethefollowinginformation: a) areferencetothisInternationalStandardandthereferringstandard; b) alldetailsnecessaryforfullidentificationofthepipet
18、ested; c) thenumberoftestpieces; d) themethodoftestused,i.e.methodA; e) thetestpressure,inbars 1) ; f) thedurationofthetestorthetimetofailure,inminutes; g) theoccurrenceorabsenceofleakage; h) anyfactorswhichmayhaveaffectedtheresults,suchasanyincidentsoranyoperatingdetailsnotspecifiedin thisInternati
19、onalStandard; i) thedateofthetest. 1)1bar=10 5 N/m 2 =0,1MPaISO ISO7511:1999(E) 3 4MethodB 4.1Principle Atestpieceineitherairorwaterissubjectedtoaninternalairpressure.Thetestpieceismonitoredforevidenceof leakagewithinaspecifiedtime. NOTE Itisassumedthatthefollowingtestparametersaresetbythestandardma
20、kingreferencetothisstandard: a) thetestpressureandthetimetakentoreachit(see4.2.1and4.4.2); b) thenumberoftestpiecestobeused(see4.3); c) theperiodforwhichpressureisapplied(see4.4.3). 4.2Apparatus 4.2.1Pressurizingsystem, capableofapplyingandmaintainingtoanaccuracyofwithin 2%theinternalair pressurespe
21、cifiedinthereferringstandard,andfittedwithanautomaticpressurelimitingdevice. 4.2.2Pressuremeasuringdevice, ofsufficientaccuracytoensureconformityto4.2.1. 4.2.3 Endsealingdevices, suchasendcaps,internalstoppersorinflatablebags,dependingonthediameterof thetestpiece.Meansshallbeprovidedtopreventmovemen
22、tofthesealingdeviceunderpressure.Suchdevices shallnottransmitendthrusttothetestpiece. 4.3Testpieces 4.3.1 Eachtestpieceshallbeafitting. 4.3.2 Thenumberoftestpiecesshallbeasspecifiedinthereferringstandard. 4.4Procedure WARNINGAttentionisdrawntothedangersassociatedwithpneumaticpressureandtheneedtotake
23、 allnecessaryprecautionstopreventinjurytopersonnel.Forreasonsofsafety,itisrecommendedthatthe testpressuredoesnotexceed0,1barunlessotherwisespecifiedbythereferringstandard. 4.4.1 Attachtheendsealingdevicestothetestpiece,ensuringthatendthrustwillnotbetransmittedtothetest piece.Connectthetestpiecetothe
24、pressurizingsystemthroughoneoftheendsealingdevices.Eitherpaintthe outersurfaceofthetestpiecewithasolutionofsoaporasimilaragentifthetestisperformedinair,orimmersethe testpiececompletelyinwater. 4.4.2 Pressurizethetestpiecetothetestpressurespecifiedbythereferringstandard(see4.1). 4.4.3 Maintainthetest
25、pressureforthetimespecifiedbythereferringstandard(see4.1)oruntilleakageis observed,whicheveroccursfirst. Inspectforandrecordanybubblingcausedbyairescapingthroughthewallofthetestpiece. 4.5Testreport Thetestreportshallincludethefollowinginformation: a) areferencetothisInternationalStandardandthereferr
26、ingstandard; b) alldetailsnecessaryforfullidentificationofthepipeorfittingtested; c) thenumberoftestpieces;ISO7511:1999(E) ISO 4 d) themethodoftestused,i.e.methodB; e) thetestpressure,inbars; f) thedurationofthetestorthetimetofailure,inminutes; g) theoccurrenceorabsenceofleakage; h) anyfactorswhichmayhaveaffectedtheresults,suchasanyincidentsoranyoperatingdetailsnotspecifiedin thisInternationalStandard; i) thedateofthetest.ISO7511:1999(E) ISO ICS23.040.20;23.040.45 Pricebasedon4pages
