1、BRITISH STANDARD BS EN 12237:2003 Ventilation for buildings Ductwork Strength and leakage of circular sheet metal ducts The European Standard EN 12237:2003 has the status of a British Standard ICS 91.140; 91.140.30 BS EN 12237:2003 This British Standard was published under the authority of the Stand
2、ards Policy and Strategy Committee on 16 April 2003 BSI 16 April 2003 ISBN 0 580 41588 0 National foreword This British Standard is the official English language version of EN 12237:2003. The UK participation in its preparation was entrusted to Technical Committee RHE/2, Air distribution and air dif
3、fusion, which has the responsibility to: A list of organizations represented on this committee 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 und
4、er the section entitled “International 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 app
5、lication. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed;
6、monitor related international and European developments 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 11 and a back cover. The BSI copyright date displayed in this document indicates when the document was l
7、ast issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN12237 April2003 ICS91.140;91.140.30 Englishversion VentilationforbuildingsDuctworkStrengthandleakageof circularsheetmetalducts VentilationdesbtimentsRseaudeconduits Rsistanceettanch
8、itdesconduitscirculairesentle LftungvonGebudenLuftleitungenFestigkeitund DichtheitvonLuftleitungenmitrundemQuerschnittaus Blech ThisEuropeanStandardwasapprovedbyCENon18December2002. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Stand
9、ardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra
10、nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlan
11、ds,Norway,Portugal,Slovakia,Spain,Sweden,SwitzerlandandUn ited Kingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2003CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMemb
12、ers. Ref.No.EN12237:2003EEN12237:2003(E) 2 Contents page Foreword. 3 1 Scope 4 2 Normativereferences . 4 3 Terms,definitionsandsymbols 4 3.1 Termsanddefinitions. 4 3.2 Symbols . 6 4 Classification. 6 5 Requirements 7 5.1 Leakage 7 5.2 Strength 7 6 Testrigspecification 7 7 Testprocedurestrengthandlea
13、kage . 7 7.1 Testsample. . 7 7.2 Testmethod. 7 7.3 Correctionofleakagetestresult . 8 8 Testreport. . 8 AnnexA (informative) Recommendedprocedureifthepermittedairleakagerateisexceededwhen testingaspecificinstallation . 10 Bibliography . 11EN12237:2003(E) 3 Foreword Thisdocument(EN12237:2003)hasbeenpr
14、eparedbyTechnicalCommitteeCEN /TC 156“Ventilationfor buildings“,thesecretariatofwhichisheldbyBSI. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidenticaltextor byendorsement,atthelatestbyOctober2003,andconflictingnationalstandardsshallbewithdrawnatthelatest byOc
15、tober2003. AnnexAisinformative. Thestandardisoneofaseriesofstandardsforductworkusedforventilationandairconditioningofbuildingsfor humanoccupancy.ThepositionofthisstandardinthefieldofmechanicalbuildingservicesisshowninFigure1. Mechanicalbuildingservices ControlSystems Ventilationandair conditioningsy
16、stems HeatingSystems Airhandlingunits Ductwork Installation Sheetmetal airductswith circularcross section Dimensions Circularsheet metalairducts Requirementsfor strengthand leakage Rectangularsheet metalairducts Requirementsfor strengthand leakage Ductwork hangersand supports Requirements forstrengt
17、h Flanges Sheetmetal airductswith rectangular crosssection Dimensions Measurementof ductsurfacearea Requirementsfor ductwork componentsto facilitate maintenance Determinationof mechanicalenergy loss Flexible ducts Ductworkmadeof insulationductboards Figure1 - PositionofEN12237inthefieldofmechanicalb
18、uildingservicesEN12237:2003(E) 4 AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing countriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark,Finland, France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlan
19、ds,Norway,Portugal, Slovakia,Spain,Sweden,SwitzerlandandtheUnitedKingdom. 1Scope ThisEuropeanStandardspecifiesrequirementsandtestmethodsforstrengthandairleakageofcircularductwork usedinairconditioningandventilationsystemsinbuildings. Thestandardisintendedtoestablishthemechanicalstrengthandleakagereq
20、uiredtoverifythefitnessforthe intendedserviceasinstalledductwork. Thestandardisintendedfortestingspecificinstallationsaswellasproductseriesingeneralunderinsituor laboratoryconditions.Therequirementsandmethodsareapplicablealsotorectangularductworkinrespectofair leakage. Arecommendedprocedure,iftheper
21、mittedairleakagerateisexceededwhentestingaspecificinstallation,is givenininformativeannexA. 2 Normativereferences ThisEuropeanStandardincorporates,bydatedorundatedreference,provisionsfromotherpublications.These normativereferencesarecitedattheappropriateplacesinthetext,andthepublicationsarelistedher
22、eafter.For datedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplytothisEuropean Standardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthelatesteditionofthe publicationreferredtoapplies(includingamendments). CR12792:1997, VentilationforbuildingsSymbolsandte
23、rminology. prEN14239:2001, VentilationforbuildingsDuctworkMeasurementofductworksurfacearea. 3 Terms,definitionsandsymbols 3.1Termsanddefinitions ForthepurposesofthisEuropeanStandardthetermsanddefinitionsgiveninCR12792:1997apply. 3.1.1 ductsurfacearea A j surfaceareaoftheductworkundertest seeprEN1423
24、9:2001 3.1.2 totaljointlength L actualtotallengthoftheperipheryoftheinstallationjointsincludedinthetestsectionoftheductwork 3.1.3 testpressure p test staticairpressuredifferencebetweenthepressurewithintheductworktobetestedandthepressureofthe surroundingairEN12237:2003(E) 5 3.1.4 designoperatingpress
25、ure p design maximumstaticairpressuredifferenceatwhichtheinstalledductworkisdesignedtooperateundernormal conditions 3.1.5 staticpressurelimit p s maximumdesignoperatingpressurefortheductworkaccordingtoitsairtightnessclass NOTE Thestaticpressurelimits,positiveandnegative,fortheappropriateairtighnessc
26、lassarespecifiedinTable2. 3.1.6 airleakagerate q v airleakageflowrateoftheductworkundertest 3.1.7 measuredairleakagerate q vlmeasured airleakageflowratebeforecorrection 3.1.8 airtemperature t temperatureoftheairduringthetest 3.1.9 atmosphericpressure p a barometricpressureofambientairduringthetest 3
27、.1.10 airleakagefactor f leakageflowrateperunitsurfaceareaoftheduct( f= q v IA j ) 3.1.11 airleakagelimit f max maximumpermittedleakagefactorfortheductworkaccordingtoitsairtightnessclassEN12237:2003(E) 6 3.2Symbols ThenomenclatureshowninTable1isusedthroughoutthisEuropeanStandard. Table1 - Symbols Sy
28、mbol Quantity Units Aj Ductsurfacearea m 2 f Airleakagefactor m 3 s 1 m 2 f max Airleakagelimit m 3 s 1 m 2 L Totaljointlength m p Absolutestaticpressure Pa p a Atmosphericpressure Pa p d Velocitypressure Pa p design Designoperatingpressure Pa p r Stagnation(orabsolutetotalpressure) Pa p s Staticpre
29、ssurelimit( p p a ) Pa p test Testpressure Pa q vlmeasured Measuredairleakagevolumerate m 3 s 1 orl s 1 q v Volumerateofairflowattheflowmeter m 3 s 1 orl s 1 q vl Leakagevolumerateofairflow m 3 s 1 orl s 1 t Airtemperature C 4Classification TheairtightnessclassesshallbeasspecifiedinTable2. Table2 -
30、DuctworkClassification Airtightness class Staticpressurelimit (p s ) Pa Airleakagelimit (f max ) m 3 s 1 m 2 Positive Negative A 500 500 0,027 p t 0,65 10 3 B 1000 750 0,009 p t 0,65 10 3 C 2000 750 0,003 p t 0,65 10 3 D a 2000 750 0,001 p t 0,65 10 3 a Ductworkforspecialapplications.EN12237:2003(E)
31、 7 5Requirements 5.1Leakage Theleakagefactor( f)shallbelowerthantheairleakagelimit( f max ),correspondingtotherequiredairtightness class,specifiedinTable2foranytestpressure( p test )lowerthanorequaltothedesignoperatingpressure( p design ). Therequirementsshallbesatisfiedforpositiveandnegativepressur
32、es. 5.2Strength Theductworkshallwithstandthestaticpressurelimits( p s )specifiedinTable2withoutpermanentdeformation,or anysuddenchangeinleakageflowrateortestpressure.Adeformationshallbereportedonlywhenitgivesacross sectionareareductionofatleast10%. 6 Testrigspecification Thetestrigshallbeinspectedby
33、theuserbeforeuseonsiteandshallhaveacalibrationcertificate,chartorgraph, indicatingsatisfactorycalibrationwithinoneyearofthetestforwhichitistobeused. 7 Testprocedurestrengthandleakage 7.1Testsample 7.1.1 Samplefortestingaspecificinstallationinsitu Thesectiontobetestedshallbesealedofffromtherestofthes
34、ystembeforecommencingthetest.Thetest sampleshallcontainarepresentativevarietyofductdimensionsandfittings.Theductworksurfaceareaofthe sectionshallbeatleast10%ofthetotalductworksurfacearea,andifpossible,atleast10m 2 . NOTE Thenormalratiobetweenthetotaljointlength( L)andductworksurfacearea( Aj)is: 1,5
35、1 j A L inm 1 7.1.2 Samplefortestingaproductseriesingeneral Thetestsampleshallcontainarepresentativevarietyofductdimensionsandfittings.Straightductsofaminimum lengthof2,5mshallbeincludedinthetestsection.Theductworksurfaceareatobetestedshallbeatleast10m 2 . Theratiobetweenthetotaljointlength( L)anddu
36、ctworksurfacearea( A j )shallbe: 1 j A L inm 1 7.2Testmethod 7.2.1 Methodfortestingaspecificinstallation Thesectiontobetestedshallbesubjectedtotestpressures,positiveandnegative,notlowerthanitsdesign operatingpressure( p design ).Theleakageratereadingsshallberecordedunderstableconditions,i.e.wheneach
37、 testpressurehasbeenmaintainedwithin5%ofthespecifiedvaluefor5minutes. NOTE ArecommendedprocedureforthecaseofexcessiveairleakagerateisgiveninannexA.EN12237:2003(E) 8 7.2.2 Methodfortestingaproductseriesingeneral Thetestsampleshallbesubjectedtoseveraltestpressures,atleast5positiveand5negative,withinar
38、angeof testpressuresuptoandincludingthestaticpressurelimit( p s ).Theleakageratereadingshallberecordedunder stableconditions,i.e.wheneachtestpressurehasbeenmaintainedwithin5%ofthespecifiedvaluefor5 minutes. 7.3Correctionofleakagetestresult Themeasuredleakageflowrateshallbecorrectedifthetemperature(
39、t)and/oratmosphericpressure( p a )are differentfromthestandardconditions(+20Cand101325Pa)asfollows: 101325 273 293 a vlmeasured vl p t q q + = 8 Testreport Thetestreportshallincludethefollowinginformationonthetests: a) thedateandplaceoftest; b) thetestpersonnelandwitnesses; c) arecordofthetestequipm
40、ent,includingthemeansofpressurisingthesampleandthemeasuringinstruments withtheappropriatecalibrationreference; d) theairtemperatureandatmosphericpressureduringthetest; e) thebuildingorprojectreference; f) thedesignoftheinstalledductworkincludingdimensions,length,typeofductsandfittings,assemblymethod
41、, andthetypeanddistanceofhangers/supports; g) therequiredairtightnessclassanddesignoperatingpressureoftheinstalledductwork; h) theidentityoftheinstallerofductwork; i) theidentityofthemanufacturerofductwork; Thetestreportshallalsoincludethefollowing: j) themeasuredvaluesof: 1) ductworksurfacearea( A
42、j ); 2) totaljointlength( L); 3) testpressure( p test ); 4) airleakagerate( q vl )correctedfortemperatureandbarometricpressure; 5)pressurising time; 6) observeddeformationoftheductworkduringthetest; k) thecalculatedvaluesof: 1) airleakagefactor( f); 2) airleakagelimit( f max )atthemeasuredtestpressu
43、re( p test ); l)airtightness class achieved.EN12237:2003(E) 9 Fortestsincludingseveraltestpressuresitisrecommendedtoplottheleakagefactorsasafunctionoftest pressureinadiagramtogetherwiththeairleakagelimitcurve.EN12237:2003(E) 10 AnnexA (informative) Recommendedprocedureifthepermittedairleakagerateisexceededwhen testingaspecificinstallation Iftheairleakagerateexceedsthepermittedrate,thetestshouldbeextendedtoincludeanadditionalequal percentageofthetotalductworksurfacearea.Iftheairleakagestillexceedsthepermittedrate,theentireductwork shouldbetested.EN1
