1、 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 746-5:2000 The Euro
2、pean Standard EN 746-5:2000 has the status of a British Standard ICS 25.180.10 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Industrial thermoprocessing equipment Part 5: Particular safety requirements for salt bath thermoprocessing equipmentThis British Standard, having bee
3、n prepared under the direction of the Engineering Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 November 2000 BSI 11-2000 ISBN 0 580 35979 4 BS EN 746-5:2000 Amendments issued since publication Amd. No. Date Comments National foreword This
4、 British Standard is the official English language version of EN 746-5:2000. The UK participation in its preparation was entrusted by Technical Committee MCE/3, Safeguarding of machinery, to Subcommittee MCE/3/8, Thermoprocessing equipment - Safety, which has the responsibility to: aid enquirers to
5、understand the text; present to the responsible 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. A list of organizations represented on this subc
6、ommittee 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 Standards Catalogue under the section entitled “International Standards Correspondence Index”, or b
7、y using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer imm
8、unity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 24, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued.EUROPEANSTANDARD NORME
9、EUROPENNE EUROPISCHENORM EN7465 September2000 ICS25.180.01 Englishversion IndustrialthermoprocessingequipmentPart5:Particularsafety requirementsforsaltbaththermoprocessingequipment EquipementsthermiquesindustrielsPartie5: Prescriptionsparticuliresdescuritpourles quipementsthermiquesbaindesel Industr
10、ielleThermoprozeanlagenTeil5:Besondere SicherheitsanforderungenanSalzbad Wrmebehandlungseinrichtungenundanlagen ThisEuropeanStandardwasapprovedbyCENon22November1999. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofan
11、ationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation under
12、theresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Netherlands,Norway,Portugal,Spain,S
13、weden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG CentralSecretariat:ruedeStassart,36B1050Brussels 2000CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN7465:2000EPage2 EN746
14、5:2000 Contents Page FOREWORD 3 0 INTRODUCTION 4 1S C O P E 4 2 NORMATIVEREFERENCES 4 3 DEFINITIONS 6 3.1 SaltBathThermoprocessingEquipment 6 3.2 Components 6 4 LISTOFHAZARDS 6 5 SAFETYREQUIREMENTSAND/ORMEASURES 9 5.1 General 9 5.2 Liquidsinthesaltbatharea 10 5.3 LeakingorOverflowingSalt 10 5.4 Slip
15、pingorfallingofpersonsintothemoltensalt 11 5.5 OutletsfromCoolingSystems 11 5.6 SaltSplashes 11 5.7 OverheatingoftheBath 12 5.8 Fumes,DustsandGases 12 5.9 Breakageoffasteningpoints 13 5.10 Breakageofprotectiontubeofthermocouple 13 5.11 Solidificationandsubsequentremeltingofthesaltsinthebath 13 5.12
16、Workpiecesupports 14 5.13 ErgonomicRequirements 14 6 VERIFICATIONOFSAFETYREQUIREMENTSAND/ORMEASURES 14 6.1 General 14 6.2 Suggestedtestforsafetydeviceandautomaticshutdown 14 6.3 Suggestedtestforfunctionoftheagitatorsystem 15 7 INFORMATIONFORUSE 15 7.1 General 15 7.2 Specificinformationtobeprovided 1
17、6 ANNEXA(INFORMATIVE)Examplesofsaltbathfurnacesetups 20 ANNEXZA(INFORMATIVE)ClausesofthisEuropeanStandardaddressing essentialrequirementsorotherprovisionsofEUDirectives. 24Page3 EN7465:2000 FOREWORD ThisEuropeanStandardhasbeenpreparedbyTechnicalCommitteeCEN/TC186“Industrial thermoprocessingSafety“,t
18、hesecretariatofwhichisheldbyDIN. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublication ofanidenticaltextorbyendorsement,atthelatestbyMarch2001,andconflictingnational standardsshallbewithdrawnatthelatestbyMarch2001. ThisEuropeanStandardhasbeenpreparedunderamandategiventoCEN
19、bytheEuropean CommissionandtheEuropeanFreeTradeAssociation,andsupportsessentialrequirementsof EUDirective(s). ForrelationshipwithEUDirective(s),seeinformativeAnnexZA,whichisanintegralpartof thisstandard. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizations ofthefollowingcou
20、ntriesareboundtoimplementthisEuropeanStandard:Austria,Belgium, CzechRepublic,Denmark,Finland,France,Germany,Greece,Iceland,Ireland,Italy, Luxembourg,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandtheUnited Kingdom. TheworkinggroupthatdraftedthisPartofEN746comprisedexpertsfromthefollowing cou
21、ntries:France,Germany,Italy,SwedenandUnitedKingdom. ThisstandardformsonepartofaseriessafetystandardscoveringIndustrial ThermoprocessingEquipment. ThefulllistofpartsofEN 746isgivenbelow: EN746 IndustrialThermoprocessingEquipment Part1: CommonSafetyRequirementsforIndustrialThermoprocessing Equipment P
22、art2: SafetyRequirementsforCombustionandFuelHandlingSystems Part3: SafetyRequirementsfortheGenerationandUseofAtmospheregases Part4: ParticularSafetyRequirementsforHotDipGalvanising ThermoprocessingEquipment Part5: ParticularSafetyRequirementsforSaltBathThermoprocessing Equipment Part6: ParticularSaf
23、etyRequirementsforMaterialMelting,Remeltingand LiquidPhaseMaintainingThermoprocessingEquipment Part7: ParticularSafetyRequirementsforVacuumThermoprocessing Equipment Part8: ParticularSafetyRequirementsforQuenchingEquipment Anassessmentoftheforeseeablerisksarisingfromtheuseoftheequipmentwascarriedout
24、 whenthisstandardwasprepared.Page4 EN7465:2000 TheannexesAandZAareinformative. 0 INTRODUCTION TheEN7461GeneralSafetyRequirementscontainsthecommonsafetyprovisionsand devicesforalltypesofindustrialthermoprocessingequipment.Thispartofthestandard detailsinadditionthoseextrasafetyrequirementswhichneedspe
25、cialattentionagainstthe equipmentlistedinthescope. ThisEuropeanStandardisatypeCstandardasdefinedinEN292:1991. Theextenttowhichhazardsarecoveredisindicatedinthescopeofthisstandard. 1S C O P E ThispartofEN746givesthespecifichazardsandsafetyrequirementsforthemeltinganduse ofmoltensaltthatshallbeprovide
26、dbythemanufacturerforSaltBathIndustrial ThermoprocessingEquipment,whetheritisusedasanindependentunitoranintegratedpart ofaplant.Thelimitsoftheequipmentwillincludeanytransportationequipmentwhichis locatedwhollyorpartiallyinthebath. ThispartofEN746doesnotcoverthehandling,storage,transport,disposal,tra
27、nsferor regenerationofthesaltsandprocessedmaterialoutsidethelimitsoftheequipment. ThispartofEN746appliesnotonlytothenormaloperationoftheequipmentbutalsotothe safetyofpersonnelandpropertywhenforeseeablefaultsoccur. ExamplesofsaltbathfurnacesetupsareshowninFig.1,Fig.2,Fig.3andFig.4. NOTE: Therearemany
28、variationsinthedesignofsaltbathequipment.Onlythree examplesofthevarioustypesaregiveninthistext. 2 NORMATIVEREFERENCES ThisEuropeanStandardincorporatesbydatedorundatedreferences,provisionsfromother publications.Thesenormativereferencesarecitedattheappropriateplacesinthetextandthe publicationsareliste
29、dhereafter.Fordatedreferences,subsequentamendmentstoorrevisions ofanyofthesepublicationsapplytothisEuropeanstandardonlywhenincorporatedinitby amendmentorrevision.Forundatedreferencesthelatesteditionofthepublicationreferredto applies. EN166 PersonaleyeprotectionSpecifications EN2921:1991 Safetyofmach
30、ineryBasicconcepts,generalprinciplesfordesign Part1: Basicterminology,methodology EN2922:1991 SafetyofmachineryBasicconcepts,generalprinciplesfordesign Part2: TechnicalprinciplesandspecificationsPage5 EN7465:2000 EN345 Specificationforsafetyfootwearforprofessionaluse EN346 Specificationforprotective
31、footwearforprofessionaluse EN469 ProtectiveclothingforfirefightersRequirementsandtestmethodsfor protectiveclothingforfirefighting EN531 Protectiveclothingforindustrialworkersexposedtoheat(excluding firefightersandweldersclothing) EN563 SafetyofmachineryTemperaturesoftouchablesurfacesErgonomics datat
32、oestablishtemperaturelimitvaluesforhotsurfaces EN6141 SafetyofmachineryErgonomicdesignprinciples Part1: Terminologyandgeneralprinciples EN7461:1997 IndustrialThermoprocessingEquipment Part1: CommonSafetyRequirementsforIndustrial ThermoprocessingEquipment EN7462:1997 IndustrialThermoprocessingEquipme
33、nt Part2: SafetyRequirementsforCombustionandFuelHandling Systems EN7468:2000 IndustrialThermoprocessingEquipment Part8: ParticularSafetyRequirementsforQuenchingEquipment EN953 SafetyofmachineryGuardsGeneralrequirementsforthedesignand constructionoffixedandmovableguards EN9541 SafetyofmachinerySafety
34、relatedpartsofcontrolsystems Part1: Generalprinciplesfordesign prEN10052:1998 SafetyofmachineryHumanphysicalperformance Part2: Manualhandlingofmachineryandcomponentpartsof machinery prEN10053:1998 SafetyofmachineryHumanphysicalperformance Part3: Recommendedforcelimitsformachineryoperation EN1070 Saf
35、etyofmachineryTerminology EN10934 SafetyofmachineryEvaluationoftheemissionofairbornehazardous substances Part4: CaptureefficiencyofanexhaustsystemTracermethod EN10095 HeatrestistingsteelsandalloysPage6 EN7465:2000 EN613101 SafetyofmachineryIndication,markingandactuation Part1: Requirementsforvisual,
36、auditoryandtactilesignals (IEC613101:1995) 3 DEFINITIONS ForthepurposesofthisstandardthedefinitionsgiveninEN1070apply. Additionaldefinitionsspecificallyneededforthispartofthisstandardareaddedbelow: 3.1 SaltBathThermoprocessingEquipment Equipmentwhichmeltsand/orcontainsvariousmoltensaltorsaltmixtures
37、intowhich workpiecesarepartiallyorfullyimmersedforapredeterminedtimeintervalinorderto modifythestructureand/orthephysicalpropertiesoftheworkpiece,orinwhichsaltis circulatedasaheattransfersystem. Theequipmentincludestheunitformeltingsaltplusthathandlingequipmentused immediatelyinthevicinitytotreateit
38、hersingleormultiplecomponents: Thisequipmentmayincludeforexample: mechanicalhandlingsystems; heatingsystems; coolingsystems; environmentalcontrolsystems; electricalandcontrolsystems; systemstocoverergonomicrequirementsand washingandagitatingsystems. 3.2 Components Workpiecesoranyotherobjectimmersedi
39、nthesaltbath. 4 LISTOFHAZARDS Anassessmentoftheforeseeablerisksarisingfromtheuseoftheindustrialthermoprocessing equipmenthasbeencarriedoutwhenthisstandardwaselaborated. Theclausehasbeencondensedintoatable(seetable1).Itsummarisesthoseareaswhich requireconsiderationbythemanufacturer.Foreaseofreference
40、thetableindicatestheneed forsafetyfeaturesorinstructionsincolumns.Thetableshallonlybeusedinconjunctionwith clauses5and7wherefurtherdetailisgiven. Table1showstheHazard,HazardousSituation,PreventativeMeasuresandtheVerification Means(aspointedoutinclause6)identifiedfortheequipmenttypedescribedinthispar
41、tto thisstandard.Page7 EN7465:2000 Table1: ListofHazards,HazardousSituationsandPreventativeMeasures 1 Item 2 Hazard 3 Hazardoussituations 4 Preventativemeasures 5 Re ferences 6 Verifi cation means *) 1 Mechanical 1.1 Crushing/ Shearing/ Entangle ment Mechanicalhandlingsystem lift continuousmetalconv
42、eyorbelt continuousfeedingequipmentfor wire/strip Forallcases,fitfixedguardor provideprotectivefenceand interlockingorlightbeamto preventunauthorisedentryto dangerzone. EN7461:1997, 2.2/2.3and2.4 EN2922:1991, 4.1.2,4.2.2.2 EN2921:1991, 3.22.1 1 1 1 Providenonslipsurfaces and/orcheckeredplate/wire me
43、shwalkwaysurfaces. EN7461:1997, 5.2.11 1 1 1 1.2 Slip/Trip floorsurface walkway spilledfluids(e.g.water/salt) Ensurethatinformationforuse containsadviceongood housekeeping 1 1.3 Falls intobath ontoequipment Fitprotectivefencing 5.4 1 1.4 Drawingin stripprocessingequipment washingandagitatingsystem F
44、orbothcases,fitfixedguard orprovideprotectivefence and/orinterlockingorlight beamtopreventunauthorised entrytodangerzone. EN7461:1997, 2.2/2.3and2.4 EN2922:1991, 4.1.2,4.2.2.2 EN2921:1991, 3.22.1 1 1 1.5 Breakageoffasteningpointsofpot ortankduringtransportation Injurytopersons Designtogiveadequate strengthandcorrosion resistance 5.9 7.2.9 1and3 2 Thermal Useelectricorpneumatic systemswhereverpossible 5.2 5.6 1 2.1 Highpressureliquidinjectedinto moltensalt Avoidus
