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
