EN 12729-2002 en Devices to prevent pollution by backflow of potable water - Controllable backflow preventer with reduced pressure zone - Family B - Type A《防止饮用水回流污染的装置 减压区可控的防回流装置.pdf
《EN 12729-2002 en Devices to prevent pollution by backflow of potable water - Controllable backflow preventer with reduced pressure zone - Family B - Type A《防止饮用水回流污染的装置 减压区可控的防回流装置.pdf》由会员分享,可在线阅读,更多相关《EN 12729-2002 en Devices to prevent pollution by backflow of potable water - Controllable backflow preventer with reduced pressure zone - Family B - Type A《防止饮用水回流污染的装置 减压区可控的防回流装置.pdf(36页珍藏版)》请在麦多课文档分享上搜索。
1、BRITISH STANDARD Devices to prevent pollution by backflow of potable water Controllable backflow preventer with reduced pressure zone Family B Type A ICS 13.060.20; 91.140.60 BS EN 12729:2002 Incorporating corrigendum April 2009BS EN 12729:2002 National foreword This British Standard is the UK imple
2、mentation of EN 12729:2002. The UK participation in its preparation was entrusted by Technical Committee B/504, Water upply, to Subcommittee B/504/4, Backflow revention. A list of organizations represented on this committe can be obtained on request to its secretary. This publication does not purpor
3、t to include all necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standard Policy and Strategy Committee on 30 Januar
4、y 2003 BSI 2009 ISBN 978 0 580 65889 1Date Comments Correction to the committee details in the ational foreword s p sub e the Amendments/corrigenda issued since publicationn 3 April 2009 0EUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN12729 November2002 ICS13.060.20;91.140.60 Englishversion Device
5、stopreventpollutionbybackflowofpotablewater Controllablebackflowpreventerwithreducedpressurezone FamilyBTypeA Dispositifsdeprotectioncontrelapollutionparretourde leaupotableDisconnecteurzonedepressionrduite contrlableFamilleBTypeA SicherungseinrichtungenzumSchutzdesTrinkwassers gegenVerschmutzungdur
6、chRckflieenSystemtrenner mitkontrollierbarerdruckreduzierterZoneFamilieBTyp A ThisEuropeanStandardwasapprovedbyCENon7September2002. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteratio
7、n.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoits
8、ownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdo
9、m. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2002CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN12729:2002EEN12729:2002(E) 2 Contents page Foreword3 In
10、troduction .4 1 Scope 5 2 Normativereferences 5 3 Termsanddefinitions. .6 4 Denomination .7 5 Designation.7 6 Symbolization.7 7 Physicochemicalcharacteristics 8 7.1 Materials8 7.2 Natureofthematerials . .8 8 Design .9 8.1 General9 8.2 Reliefvalve .9 9 Characteristicsandtests . .10 9.1 General10 9.2
11、Generaltolerances .10 9.3 Expressionoftheresults. .10 9.4 Dimensionalcharacteristics . 10 9.5 Mechanicalcharacteristics .11 9.6 Tightnesscharacteristics. .15 9.7 Hydrauliccharacteristics . .18 10 Orderoftesting . .23 11 Markingandtechnicaldocuments .24 11.1 Marking .24 11.2 Technicaldocuments 24 12
12、Presentationatdelivery . .25 AnnexA (informative) Examplesofpresentationoftestresults.26 Bibliography 32 BS EN12729:2002EN12729:2002(E) 3 Foreword Thisdocument(EN12729:2002)hasbeenpreparedbyTechnicalCommitteeCEN/TC164“Watersupply“,the secretariatofwhichisheldbyAFNOR. ThisEuropeanStandardshallbegiven
13、thestatusofanationalstandard,eitherbypublicationofanidenticaltextor byendorsement,atthelatestbyMay2003,andconflictingnationalstandardsshallbewithdrawnatthelatestby May2003. TheannexAisinformative. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing countriesa
14、reboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark,Finland, France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain, Sweden,SwitzerlandandtheUnitedKingdom. BS EN12729:2002EN12729:2002(E) 4 Introduction Inrespectofpotentialadverseeffect
15、sonthequalityofwaterintendedforhumanconsumption,causedbythe productcoveredbythisstandard: a) thisstandardprovidesnoinformationastowhethertheproductmaybeusedwithoutrestrictioninanyofthe MemberStatesoftheEUorEFTA; b) itshouldbenotedthat,whileawaitingtheadoptionofverifiableEuropeancriteria,existingnati
16、onalregulations concerningtheuseand/orthecharacteristicsofthisproductremaininforce. BS EN12729:2002EN12729:2002(E) 5 1Scope ThisEuropeanStandardspecifiesthefieldofapplication,thedimensional,thephysicochemical,thedesign,the hydraulic,themechanical,andtheacousticcharacteristicsofcontrollablebackflowpr
17、eventerwithreduced pressurezoneFamilyBTypeA. ThisstandardcoverscontrollablebackflowpreventersofFamilyBTypeA,withreducedpressurezones,intended topreventbackflowbybacksiphoningorbackpressureofwaterintothepotablewaterdistributionsystemwhenever thepressureofthelatterislowerthanthesystemlocateddownstream
18、. ItisapplicabletocontrollablebackflowpreventersindenominationsDN8uptoDN250. ItcoverscontrollablebackflowpreventersofPN10thatarecapableofworkingwithoutmodificationoradjustment: atanypressureupto1MPa(10bar); withanypressurevariationupto1MPa(10bar); inpermanentdutyatalimitedtemperatureof65Cand90Cfor1h
19、maximum. Itspecifiesalsothetestmethodsandrequirementsforverifyingtheircharacteristics,themarkingandthe presentationatdelivery. 2 Normativereferences ThisEuropeanStandardincorporatesbydatedorundatedreference,provisionsfromotherpublications.These normativereferencesarecitedattheappropriateplacesinthet
20、ext,andthepublicationsarelistedhereafter.For datedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplytothisEuropean Standardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthelatesteditionofthe publicationreferredtoapplies(includingamendments). EN8061:2000, Sp
21、ecificationsforinstallationsinsidebuildingsconveyingwaterforhumanconsumptionPart1: General. EN10921, FlangesandtheirjointsCircularflangesforpipes,valves,fittingsandaccessories,PNdesignated Part1:Steelflanges. EN10922, FlangesandtheirjointsCircularflangesforpipes,valves,fittingsandaccessories,PNdesig
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