BS EN 12078-1998 Zero governors for gas burners an

|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||BRITISHSTANDARDBSEN12078:1998TheEuropeanStandardEN12078:1998hasthestatusofaBritishStandardICS23.060.40NOCOPYINGWITHOUTBSIPERMISSIONEXCEPTASPERMITTEDBYCOPYRIGHTLAWZerogovernorsforgasburnersandgasburningappliancesBSEN12078:1998ThisBritishStandard,havingbeenpreparedunderthedirectionoftheEngineeringSectorCommittee,waspublishedundertheauthorityoftheStandardsCommitteeandcomesintoeffecton15December1998©BSI1998ISBN0580303756AmendmentsissuedsincepublicationAmd.No.DateTextaffectedNationalforewordThisBritishStandardistheEnglishlanguageversionofEN12078:1998.TheUKparticipationinitspreparationwasentrustedbyTechnicalCommitteeGSE/22,Safetyandcontroldevicesforgasgovernorsandgasburningappliances,toSubcommitteeGSE/22/19,Gas/airratiocontrols,whichhastheresponsibilityto:Ðaidenquirerstounderstandthetext;ÐpresenttotheresponsibleEuropeancommitteeanyenquiriesontheinterpretation,orproposalsforchange,andkeeptheUKinterestsinformed;ÐmonitorrelatedinternationalandEuropeandevelopmentsandpromulgatethemintheUK.Alistoforganizationsrepresentedonthissubcommitteecanbeobtainedonrequesttoitssecretary.Cross-referencesTheBritishStandardswhichimplementinternationalorEuropeanpublicationsreferredtointhisdocumentmaybefoundintheBSIStandardsCatalogueunderthesectionentitledªInternationalStandardsCorrespondenceIndexº,orbyusingtheªFindºfacilityoftheBSIStandardsElectronicCatalogue.ABritishStandarddoesnotpurporttoincludeallthenecessaryprovisionsofacontract.UsersofBritishStandardsareresponsiblefortheircorrectapplication.CompliancewithaBritishStandarddoesnotofitselfconferimmunityfromlegalobligations.SummaryofpagesThisdocumentcomprisesafrontcover,aninsidefrontcover,theENtitlepage,pages2to15andabackcover.CENEuropeanCommitteeforStandardizationComiteÂEuropeÂendeNormalisationEuropaÈischesKomiteefuÈrNormungCentralSecretariat:ruedeStassart36,B-1050Brussels©1998CENAllrightsofexploitationinanyformandbyanymeansreservedworldwideforCENnationalMembers.Ref.No.EN12078:1998EEUROPEANSTANDARDEN12078NORMEEUROPEÂENNEEUROPAÈISCHENORMAugust1998ICS23.060.40Descriptors:gasapplianceburners,pressureregulators,definitions,safety,equipmentspecifications,materials,junctions,dimensions,performanceevaluation,durability,tests,leaktests,performancetests,marking,technicalnoticesEnglishversionZerogovernorsforgasburnersandgasburningappliancesDeÂtendeursaÁzeÂropourbruÃleursaÁgazetappareilsaÁgazNulldruckreglerfuÈrGasbrennerundGasgeraÈteThisEuropeanStandardwasapprovedbyCENon26July1998.CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEuropeanStandardthestatusofanationalstandardwithoutanyalteration.Up-to-datelistsandbibliographicalreferencesconcerningsuchnationalstandardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember.ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).AversioninanyotherlanguagemadebytranslationundertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusastheofficialversions.CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom.Page2EN12078:1998©BSI1998ForewordThisEuropeanStandardhasbeenpreparedbyTechnicalCommitteeCEN/TC58,Safetyandcontroldevicesforgas-burnersandgas-burningappliances,theSecretariatofwhichisheldbyBSI.ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidenticaltextorbyendorsement,atthelatestbyFebruary1999,andconflictingnationalstandardsshallbewithdrawnatthelatestbyFebruary1999.ThisEuropeanStandardhasbeenpreparedunderamandategiventoCENbytheEuropeanCommissionandtheEuropeanFreeTradeAssociation,andsupportsessentialrequirementsofEUDirective(s).ForrelationshipwithEUDirective(s),seeinformativeAnnexZA,whichisanintegralpartofthisstandard.AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowingcountriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandtheUnitedKingdom.ContentsPageForeword21Scope32Normativereferences33Definitions34Unitsofmeasurement45Constructionrequirements45.1General45.2Materials55.3Connections55.4Sealsforglandsformovingparts65.5Pressuretestnipples66Performancerequirements66.1General66.2Externalleak-tightness6Page6.3Torsionandbending66.4Durability76.5Zerogovernorperformance86.6Endurance86.7Lock-uppressure86.8Responsetime87Testmethods87.1Mountingposition87.2Testconditions87.3Externalleak-tightness87.4Torsionandbending87.5Durability107.6Zerogovernorperformancetest107.7Pressuredrop(fullyopen)137.8Endurance137.9Lock-uppressure137.10Dynamicresponsetest138Marking,installationandoperatinginstructions138.1Marking138.2Installation,operatingandser