EN 14222-2003 en Stainless steel shell boilers《不锈钢外壳的锅炉》.pdf

1、BRITISH STANDARD BS EN 14222:2003 Stainless steel shell boilers The European Standard EN 14222:2003 has the status of a British Standard ICS 27.060.30 BS EN 14222:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 14 May 2003 BSI 14 May 200

2、3 ISBN 0 580 41804 9 National foreword This British Standard is the official English language version of EN 14222:2003. The UK participation in its preparation was entrusted to Technical Committee PVE/16, Shell boilers, which has the responsibility to: A list of organizations represented on this com

3、mittee 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 “International Standards Correspondence Index”, or by using the

4、“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 Standard does not of itself confer immunity from leg

5、al 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; monitor related international and European developments and promulgate them in the UK. S

6、ummary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 12, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comm

7、entsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN14222 April2003 ICS27.060.30 Englishversion Stainlesssteelshellboilers Chaudirestubesdefumeenacierinoxydable EdelstahlGrowasserraumkessel ThisEuropeanStandardwasapprovedbyCENon21February2003. CENmembersareboundtocomplywiththeCEN/CENELECInternalReg

8、ulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversi

9、ons(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,G

10、reece, Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Slovakia,Spain,Sweden,SwitzerlandandUn ited Kingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2003CEN Allrightsofexploit

11、ationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN14222:2003EEN14222:2003(E) 2 Contents page Foreword3 1 Scope 4 2 Normativereferences 4 3 Termsanddefinitions. .4 4 Materials5 5 Design .5 6 Manufacture5 7 Inspectionandtesting .5 8 Marking .5 9 Requirementsforequipment 5 9.

12、1 General5 9.2 Safeguardsagainstexcessivepressure . 5 9.3 Materialsforvalves,fittings,flangesandbolting . .5 9.4 Limitingdevicesandsafetycircuits 6 9.5 Boilerheatsupply 6 9.6 Waterlevelindication 6 9.7 Steampressureindication. .7 9.8 Drainandblowdowndevices 8 9.9 Valvesforconnections 8 9.10 Feedwate

13、rsupply 8 9.11 Feedwatercontrol . 8 9.12 Limitingdevices. 9 10 Operationalaspectsofsteamboilers. .9 11 Smallsteamboilers .9 AnnexA (informative) Operationalaspectsofsteamboilers 10 AnnexZA (informative) ClausesofthisEuropeanStandardaddressingessentialsafetyrequirements ofthePressureEquipmentDirectiv

14、e .11 Bibliography 12EN14222:2003(E) 3 Foreword Thisdocument(EN14222:2003)hasbeenpreparedbyTechnicalCommitteeCEN/TC269“Shellandwatertube boilers“,thesecretariatofwhichisheldbyDIN. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidenticaltextor byendorsement,atthel

15、atestbyOctober2003,andconflictingnationalstandardsshallbewithdrawnatthelatest byOctober2003. ThisdocumenthasbeenpreparedunderamandategiventoCENbytheEuropeanCommissionandtheEuropean FreeTradeAssociation,andsupportsessentialrequirementsofEUDirective(s)PressureEquipmentDirective (PED)97/23/EC1. Forrela

16、tionshipwithEUDirective(s),seeinformativeannexZA,whichisanintegralpartofthisdocument. ThisEuropeanStandardreferstoEN 12953:ShellboilersandEN13445:Unfiredpressurevessels. AnnexAisinformative. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing countriesareboun

17、dtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark,Finland, France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal, Slovakia,Spain,Sweden,SwitzerlandandtheUnitedKingdom.EN14222:2003(E) 4 1Scope ThisEuropeanStandardspecifiesrequirementsfor

18、electricallyheatedshellboilersmanufacturedfromstainless steelspecificallydedicatedforgeneratingsteamforsterilizersanddisinfectors. ThisEuropeanStandardcoversonlyboilersthatareheatedbyimmersionheatersandwhichhaveamaximum allowablepressure(PS)of6bar,amaximumvolume(V)of1000litresandaproductofPSxVnotgre

19、aterthan 3000barxl. 2 Normativereferences ThisEuropeanStandardincorporatesbydatedorundatedreference,provisionsfromotherpublications.These normativereferencesarecitedattheappropriateplacesinthetext,andthepublicationsarelistedhereafter.For datedreferences,subsequentamendmentstoorrevisionsofanyofthesep

20、ublicationsapplytothisEuropean Standardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthelatesteditionofthe publicationreferredtoapplies(includingamendments). EN285:1996, SterilisationSteamsterilizersLargesterilizers . EN129531, ShellboilersPart1:General . EN129535, ShellboilersPa

21、rt5:Inspectionduringconstruction,documentationandmarkingofpressureparts oftheboiler. EN129536, ShellboilersPart6:Requirementsforequipmentfortheboiler. EN129538, ShellboilersPart8:Requirementsforsafeguardsagainstexcessivepressure. prEN129539:1999, ShellboilersPart9:Requirementsforlimitingdevicesandsa

22、fetycircuitsoftheboilerand accessories. EN134452:2002, UnfiredpressurevesselsPart2:Materials. EN134453, UnfiredpressurevesselsPart3:Design. EN134454, UnfiredpressurevesselsPart4:Fabrication. EN134455, UnfiredpressurevesselsPart5:Inspectionandtesting. EN602041, SafetyofmachineryElectricalequipmentofm

23、achinesPart 1:Generalrequirements (IEC602041:1997). 3 Termsanddefinitions ForthepurposesofthisEuropeanStandard,thetermsanddefinitionsgiveninEN129531andEN129536and thefollowingapply: 3.1 controls devicesusedformaintainingthevariabletobecontrolled(e.g.waterlevel,pressure,temperature)ataspecific value(

24、setpoint) 3.2 limiters devicethat,onreachingafixedvalue(e.g.pressure,temperature,flow,waterlevel)isusedtointerruptandlock outtheheatingenergysupplyandlockoutrequiresmanualunlockingbeforerestartEN14222:2003(E) 5 3.3 lockout isolationofenergysupplywhichrequiresamanualinterventiontoreinstate 3.4 functi

25、onalcheck testingofthesafetydevicetoensureitperformsitsintendedfunction 4Materials Eachsteamboilershallbemanufacturedfrommaterialsinsteelgroup 8or10inaccordancewith EN134452:2002,annexA. 5Design EachsteamboilershallbedesignedinaccordancewithEN134453. 6Manufacture Eachsteamboilershallbemanufacturedin

26、accordancewithEN134454. 7 Inspectionandtesting Eachsteamboilershallbeinspected,testedanddocumentedinaccordancewithEN134455. 8Marking TherequirementsformarkingshallbeinaccordancewithEN1 29535. 9Requirements for equipment 9.1General Thefollowingrequirementsforequipmentforelectricallyheatedstainlessste

27、elshellboilersareworkedoutonthe basisofEN129536. 9.2 Safeguardsagainstexcessivepressure EachsteamboilershallbeequippedwithsafeguardsagainstexcessivepressureinaccordancewithEN129538. InadeviationfromEN129538theminimuminsidediameterofthesafetyvalveseatcouldbereducedto8mm. 9.3 Materialsforvalves,fittin

28、gs,flangesandbolting Steelmaterialsforvalves,fittings,flangesandboltingshallbeinaccordancewithEN134452.EN14222:2003(E) 6 9.4 Limitingdevicesandsafetycircuits 9.4.1 LimitersshallbedesignedinadditiontoprEN129539.InaccordancewithprEN1 29539:1999,5.4.2level electrodeinclinationsbetween45and90fromthevert

29、icalshallbeallowedprovidedthatfunctionalcapability examinationshaveprovensuccessful.TheelectricalsafetycircuitsshallbeinaccordancewithEN602041. 9.4.2 Functionalcheckingofalllimitersshallbepossibleatanytimeduringoperatione.g.bysimulationwhere appropriate. 9.4.3 Ifalimiterresponds,theboilershallautoma

30、ticallygotoasafeconditionandasignalshallbegivento indicateboilermalfunction. 9.4.4 Aftermanualresettingofalimiterlockout,theboilershallbeputbackintooperationbymanual interventiononly. 9.5 Boilerheatsupply 9.5.1 Thepressureofeachboilershallbecontrolledautomaticallybyregulatingtheheatingenergyinput. 9

31、.5.2 Automaticstartupoftheboilerandthesystemispermittedprovidedthatequipmentisinstalledtoensure thatstartupisconductedsafely.Automaticrestartingafternormalshutdownshallnotbeconsideredastartup. 9.5.3 Ahightemperaturealarmdeviceforshuttingofftheheatingenergysupplyshallbeprovided.Thealarm temperaturesh

32、allbedeterminedbythemanufacturer. 9.5.4 TheelectricalsupplycircuitsandthesafetyofthecontrolequipmentshallconformtoEN602041. 9.6 Waterlevelindication 9.6.1 Eachsteamboilershallhaveatleastoneindependentmeans(independentfromotherequipment)of indicatingthewaterlevel,whichshallbeagaugeoftransparentmateri

33、aldirectlyconnectedtotheboilershell. 9.6.2 Thegauge(s)shallbemountedsothatthewaterlevelisvisiblethroughthetransparentmaterialatthe lowestalarmlevel,i.e.atthelowestpermissiblewaterlevel(LWL),whichshallbemarked.Themaximum permissiblewaterlevel,whichshallbespecifiedbytheboilermanufacturer,shallbevisibl

34、e.Thegaugeshallbe capableofshowingameasurementof“15mmbelowLWL“. 9.6.3 Thelowestpermissiblewaterlevel(LWL)oftheboiler(seeFigure1),whichshallbepermanentlyand legiblymarkedontheboilershellandidentifiedbytheletters“LWL“,shallbeatleast30mmabovetheuppermost surfaceoftheimmersionheaters“HHS“.EN14222:2003(E

35、) 7 Key 1 Controlledwaterlevel 2L W L 3 HHS Figure1Waterlevelindication 9.6.4 Pipesandfittingsconnectingawaterlevelgaugetoaboilershallbeasshortaspossibleandconstructed sothatnoundrainedpocketisformedbetweentheboilerandthegauge.Thereshallbenooutlettherefromexcept forregulators,steampressuregaugesandd

36、rainsorothersimilarapparatus,whichdoesnotpermittheescapeofa significantamountofsteam. Pipesconnectingawaterlevelgaugetotheboilershallnotbelessthan8mmbore.Whereachamberofasafety controloralarmdeviceisfittedtothewatergaugeoritspiping,theconnectingpipesbetweentheboilerandthe waterlevelgaugeshallhaveabo

37、renotlessthan15mm. 9.6.5 Wherethewaterlevelgaugeisapartoftheboilershell,therequirementsof9.6.4shallnotapply. 9.7 Steampressureindication 9.7.1 EachboilershallhaveasteampressuregaugeinaccordancewithEN285:1996,6.1.1.2,connectedtothe steamspaceeitherdirectlyorthroughthewaterlevelgaugecolumnoritssteamco

38、nnection. 9.7.2 Thesteampressuregaugeshallbeconnectedtoasiphonorsimilardeviceofsufficientcapacitytokeep thegaugetubefilledwithwater.Thepipeshallbeofsufficientsizeandshallhaveprovisionforblowingthroughif possible.Alternativelythepressurelineshallbefittedwithanisolatingmembraneclosetotheboiler.Thepres

39、sure linebetweenthemembraneandthegaugeshallcontainanoncompressiblefluid. 9.7.3 Steampressuregaugeconnectionsshallbemadesuitableforthedesignworkingpressureoftheboiler. 9.7.4 Pressuregaugesshallbegraduatedtoindicatethepressureinbars.Themaximumallowablepressure shallbeindicatedbyafixedandreadilyvisible

40、redmarkonthepressuregauge. NOTE Inaddition,theoperatingpressureandthesafetyvalvesetpressuremayalsobeindicated. 9.7.5 Eachboilershallbeprovidedwithavalveconnectionforthespecialpurposeofconnectingatestgauge whentheboilerisinservicesothattheaccuracyoftheboilersteamgaugecanbeascertained.EN14222:2003(E)

41、8 9.8 Drainandblowdowndevices 9.8.1 Eachboilershallbefittedwithdrainvalvesplacedat,orasnearaspracticableto,thelowestpointofthe apparatus. NOTE Onsomeboilers,drainvalvesmaybeusedforblowdownpurposes. 9.8.2 Wheredrainvalvesfromtwoormoreboilersareconnectedtoacommondischarge,twovalvesshallbe fittedtoeach

42、drainline,onebeingofanonreturntypetopreventthecontentsofoneboilerpassingtoanother.As analternativetothenonreturnvalvesaninterlocksystem,enablingonlyonevalvetobeopenatatimeshallbe allowed. 9.8.3 Taperplugvalveswherefitted,shallbeoftheboltedcovertypewithseparatelypackedglands. 9.8.4 Wheredrainvalvesar

43、enotselfclosingorcapableofbeinglockedintheclosedposition,afurthershutoff deviceshallbeinstalledintheline. NOTE Havingthedrainvalveenclosedbyacabinetoraninspectiondoorisincludedintheterm“beinglockedinaclosedpositi on“. 9.9 Valvesforconnections 9.9.1 Steamoutlets Thestopvalveconnectingtheboilertothesteampipeshallbeattacheddirectlytotheboilerorshallbeasnearto itaspracticable.Thevalveshouldpreferablybeofatype,whichpositivelyindicateswhetheritisopenorclosed. Where