1、BRITISH STANDARD BS EN 1277:2003 Plastics piping systems Thermoplastics piping systems for buried non-pressure applications Test methods for leaktightness of elastomeric sealing ring type joints The European Standard EN 1277:2003 has the status of a British Standard ICS 23.040.80 BS EN 1277:2003 Thi
2、s British Standard was published under the authority of the Standards Policy and Strategy Committee on 21 April 2004 BSI 21 April 2004 ISBN 0 580 43669 1 National foreword This British Standard is the official English language version of EN 1277:2003. It supersedes BS EN 1277:1996 which is withdrawn
3、. Clause 6(c) does not imply an additional deflection for those cases where the referring standard specifies a deflection. The UK participation in its preparation was entrusted by Technical Committee PRI/88, Plastic Piping Systems, to Subcommittee PRI/88/4, Pressure, which has the responsibility to:
4、 A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “Internationa
5、l Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British S
6、tandard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developm
7、ents and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 10, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issu
8、ed since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN1277 December2003 ICS23.040.80 SupersedesEN1277:1996 Englishversion PlasticspipingsystemsThermoplasticspipingsystemsfor buriednonpressureapplicationsTestmethodsfor leaktightnessofelastomericsealingringtypejoi
9、nts SystmesdecanalisationsenplastiquesSystmesde canalisationsthermoplastiquespourapplicationsenterres sanspressionMthodesdessaidtanchitdes assemblagesbaguedtanchitenlastomre KunststoffRohrleitungssystemeErdverlegte RohrleitungssystemeausThermoplastenfrdrucklose AnwendungenPrfverfahrenfrdieDichtheitv
10、on elastomerenDichtringverbindungen ThisEuropeanStandardwasapprovedbyCENon3March2003. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencescon
11、cernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehas
12、thesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Slovakia,Spain,Sweden,SwitzerlandandUn ited Kingdom. EUROPEANCOMMITTEEFORSTAN
13、DARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2003CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN1277:2003EEN1277:2003(E) 2 Foreword ThisEuropeanStandard(EN1277:2003)hasbeenprepar
14、edbyTechnicalCommitteeCEN/TC155, “Plasticspipingsystemsandductingsystems“,thesecretariatofwhichisheldbyNEN. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidentical textorbyendorsement,atthelatestbyJune2004,andconflictingnationalstandardsshallbewithdrawnat thelat
15、estbyJune2004. AnnexAisnormative. ThisdocumentsupersedesEN1277:1996. Themodificationsare: Thedeflectionofthesocketisnowpermittedtobegreaterthanspecifiedifbydeflectingthespigottothe specifiedamountthesocket,withoutapplyingloadtoit,isdeflectedtomorethanspecified.Thereason isthatexperiencewithtestingla
16、rgediameterpipesinaccordancewiththe1996versionhasshownthat forsomepipedesignsadeflectionof10%ofthespigotresultedinadeflectionlargerthan5%ofthe socketwithoutapplyinganyloadtoit.Thisisthemajorreasonfortherevision. Asupportfortheprofilesunderthedeflectiondevice,seeFigure2,arespecifiedincaseswheretherei
17、s ariskthattheprofilesaredeflectedtoomuchwhendeflectingthespigotorsocket. Figure4hasbeenaddedtoclarifythedescriptionofthedeflectiondevices. Theprocedurefordeterminingandapplyingthedeflectionhasbeendescribedinmoredetails,see6.2. Anumberofeditorialchangesincludingamorelogicorderofthedescriptionofthete
18、stequipmentand testprocedurehavebeenintroduced. Thematerialdependentparametersand/orperformancerequirementsareincorporatedintheSystem Standard(s)concerned. Thisstandardisoneofaseriesofstandardsontestmethods,whichsupportSystemStandardsforplastics pipingsystemsandductingsystems. AccordingtotheCEN/CENE
19、LECInternalRegulations,thenationalstandardsorganizationsofthefollowing countriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark, Finland,France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands, Norway,Portugal,Slovakia,Spain,Sweden,Switzerlandan
20、dtheUnitedKingdom.EN1277:2003(E) 3 1Scope ThisEuropeanstandardspecifiesthreebasictestpressuresfordeterminingtheleaktightnessofelastomeric sealingringtypejointsforburiedthermoplasticsnonpressurepipingsystems. Unlessotherwisespecifiedinthereferringstandard,themethodspressuresusedarethefollowing: p 1 :
21、internalnegativeairpressure(partialvacuum); p 2 :alowinternalhydrostaticpressure; p 3 :ahigherinternalhydrostaticpressure. Italsodescribesfourtestconditionsunderwhichthetestcanbeexecuted,asfollows: A: withoutanyadditionaldiametricorangulardeflection; B: withdiametricdeflection; C: withangulardeflect
22、ion; D: withsimultaneousangularanddiametricdeflection. Theseconditionscanbeappliedindividuallyorincombination.Theapplicableselectionofthemethod(s) andthecondition(s)shouldbespecifiedinthereferringstandard. 2Principle Atestpieceassembledfrompipesand/orfittingsissubjectedtoaspecificinitialinternalnega
23、tiveair pressure, p 1 followedbyalowspecificinitialinternalhydrostaticpressure, p 2 andahigherinternal hydrostaticpressure, p 3 . Duringtestingthejointmaybesubjectedtodiametricand/orangulardeflection(s).Thereferringproduct standardshallspecifywhichofthetestpressuresanddeflectionconditionshavetobecar
24、riedout. Eachpressureismaintainedforaspecificperiodduringwhichthejointismonitoredforleakage(see clause6). NOTE1 Itisassumedthatthefollowingtestparametersaresetbythestandardmakingreferencetothisstandard: a) thetestpressure(s), p 1 seeitemd)of6.1, p 2 seeitemf)of6.1and p 3 seeitemg)of6.1,asapplicable,
25、andthe percentageoflossofpartialvacuumseeitemd)of6.1; b) therequireddiametricand/orangulardeflectionsandtheircombinationwitheachotherand/orthetestpressure(s) NOTE2 AsaconsequenceoftherevisionofEN1277:1996amodificationoftestparametersgiveninreferring EuropeanStandardsonthermoplasticsundergrounddraina
26、geandseweragepipespublishedbeforethisEuropean Standardmayberequired(seeannexA). 3Apparatus 3.1General Theapparatusshallconsistofajigoranyotherarrangementcapableof: a) applyingthespecifieddiametricand/orangulardeflection; b) applyingthespecifiedtestpressure(s),positiveornegative; c) maintainingthetes
27、tassemblyintherequiredpositionthroughoutthetest; d) resistingtheforcesresultingfromthemassofthewaterinthetestassemblyandfromtheapplied hydrostatictestpressure(s)duringthetestperiod. Theapparatusshallnototherwisesupportthejointagainsttheinternaltestpressure.EN1277:2003(E) 4 Atypicalarrangement,allowi
28、ngangularanddiametricdeflection,isshowninFigure1. 3.2Apparatus Theapparatusshallincludethefollowingitemswhichallshallbecapableofresistingtheforcesand pressuresgeneratedduringthetest. 3.2.1 Endsealingdevices, havingasizeandusingasealingmethodappropriatetosealthenonjointed endsofthetestassembly.Thedev
29、icesshallberestrainedinamannerthatdoesnotexertlongitudinal forcesonthejointatpositivepressures; 3.2.2 Hydrostaticpressuresource ,connectedtooneofthesealingdevices,ortothetestpiece,and capableofapplyingandmaintainingthespecifiedpressureseeitemsf)andg)of6.1; 3.2.3 Negativeairpressuresource, connectedt
30、ooneofthesealingdevices,ortothetestpiece,and capableofapplyingandmaintainingthespecifiedinternalnegativeairpressureforthespecifiedtime.See itemd)of6.1; 3.2.4 Arrangement,capableofventingairfromtheassembly; 3.2.5 Pressuremeasuringdevices ,capableofcheckingconformitytothespecifiedtestpressure(see item
31、d),f)andg)of6.1). Whentestingwithdiametricdeflectionisrequiredthefollowingitemsshallalsobeincluded: 3.2.6 Mechanicalorhydraulicdevice ,capableofapplyingthenecessarydiametricdeflectiontothe spigotseeitemb)of6.1andactingonabeamwhichisfreetomoveintheverticalplanesquaretotheaxis ofthepipe.Forpipeswithad
32、iameterequaltoorgreaterthan400mm,eachbeamcanbeellipticallyshaped tosuittheexpectedshapeofthepipewhendeflectedasrequired,seeFigure4.Thelengthofthebeamor thecurvedpartofthebeamshallbegreaterthanthecontactareawiththedeflectedspigot. Thewidth, b 1 ,seeFigure1,shalldependupontheexternaldiameter, d e ,oft
33、hepipeasfollows: b 1 =100mmfor d e 710mm; b 1 =150mmfor710mm1000mm. 3.2.7 Mechanicalorhydraulicdevice ,capableofapplyingthenecessarydiametricdeflectiontothe socketseeitemb)of6.1andactingonabeamwhichisfreetomoveintheverticalplanesquaretotheaxis ofthesocket. Thelengthofthebeamorthecurvedpartofthebeams
34、hallbegreaterthanthecontactareawiththe deflectedsocket. Forpipeswithadiameterequaltoorgreaterthan400mm,eachbeammaybeellipticallyshapedtosuitthe expectedshapeofthesocketwhendeflectedasrequired,seeFigure4; Thewidth, b 2 ,shalldependupontheexternaldiameter, d e ,ofthepipeasfollows: b 2 =30mmfor d e 110
35、mm; b 2 =40mmfor110mm315mm. Whenthereisariskthatthestiffeningelements(profiles)ofastructuredwallpipeorsocketwilldeflectmore than0,1timestheprofileheight,theclampsshallbemodifiedsotheywillcomeintocontactwiththepipe wallbetweentheprofileswhentheprofileisdeflectedtobetween0,9timesand0,95timestheprofile
36、height, (seeFigure2). Suchmodificationsshallbemadefromwoodorlessflexiblematerials.EN1277:2003(E) 5 Key G Vacuumorpressuregauge E Ellipticalbeamwhenapplicable W Adjustablesupport P Pipeorfittingwithspigotend R Pipeorfittingwithsocket S Socketsupport V Connectiontopressuresource a tot Angulardeflectio
37、napplied b 1 ,b 2 Widthofclamp(see3.2.6and3.2.7) L Lengthofspigotendedpipeorfitting, where L d e or L 1000,whicheveristhegreater,inmillimetres L 1 Distancebetweensocketmouthandclamp Figure1Typicalarrangementforapplyingdiametricdistortionandangulardeflection Key 1 Modifiedloadingplate h p Constructio
38、nheight H p Profileheightoftheloadingplate;0,9 h p H p 0,95 h p Figure2Exampleofmodifiedloadingplate 4 Testpieces Thetestpieceshallcompriseanassemblyof(a)pipesection(s)and/orfitting(s)includingatleastone elastomericsealingringjoint. Thejointtobetestedshallbeassembledinaccordancewiththemanufacturersi
39、nstructionswhereavailable. ThelengthofthetestpiecesinpipeformshallbeasspecifiedinFigure1.EN1277:2003(E) 6 Thesametestassemblyshallbeusedfortheentirespecifiedtestregime. NOTE Toreducethevolumeofwaterneededasealedpipeormandrelcanbelocatedwithinthetestpieceprovided itis100%tighttothetestpressuresapplie
40、d,anditisnotofashapethatmayprovidesupportagainstpossible deformationduringthetest. Whenafittingoranyotherancillarycomponentistobetested,theappropriateendofthetestpieceshown inFigure1istobereplacedbythatcomponent. Thecomponentisfixedtothetestrigandpluggedinitsopenend(s)asappropriateforitsdesign. 5 Te
41、sttemperature Whentestingwithinternalhydrostaticpressureusingwaterthetesttemperatureshallbe(199)C. Whentestingwithinternalpartialvacuumthetesttemperatureshallbeintherangeof(235)Candthe temperaturevariationshallnotexceed2Cduringthetesting. 6Procedure 6.1General Carryoutthefollowingproceduresatthespec
42、ifiedtemperatures. a) Mountthetestpiecewithsealedendsintheapparatus; b) Whenapplicable,applythespecifiedmovementoftheloadingbeamsfordiametricdeflectionofthe spigotand/orsocketend(s)asdescribedin6.2 c) Whenapplicable,applythespecifiedangulardeflectiontothejoint.Unlessotherwisespecifiedinthe referring
43、standardtheappliedangulardeflection, a ,shallbeasfollows: a =2for d n 315mm; a =1,5for315mm630mm. Toleranceonalldeflections : a . +0,2 0 . Ifasocketisdesignedtotakeupanangulardeflection, ,thetotalangulardeflectionshallbethesum ofthedesignangle ,asdeclaredbythemanufacturer,and a . Maintainthesesettingsthroughoutthetesting. d) Whenapplicable,applythespec
