1、BRITISH STANDARD BS EN 12255-1:2002 Wastewater treatment plants Part 1: General construction principles The European Standard EN 12255-1:2002 has the status of a British Standard ICS 13.030.40; 13.060 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS EN 12255-1:2002 This Briti
2、sh Standard, having been prepared under the direction of the Building and Civil Engineering Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 5 February 2002 BSI 5 February 2002 ISBN 0 580 39005 5 National foreword This British
3、Standard is the official English language version of EN 12255-1:2002. The UK participation in its preparation was entrusted to Technical Committee B/505, Wastewater engineering, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its s
4、ecretary. 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 by using the “Find” facility of the BSI Stand
5、ards 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 immunity from legal obligations. aid enquirers
6、to 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. Summary of pages This document comprises a fr
7、ont cover, an inside front cover, the EN title page, pages 2 to 20, 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 CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISC
8、HENORM EN122551 January2002 ICS13.060.30 Englishversion WastewatertreatmentplantsPart1:Generalconstruction principles StationsdpurationPartie1:Principesgnrauxde construction KlranlagenTeil1:AllgemeineBaugrundstze ThisEuropeanStandardwasapprovedbyCENon9November2001. CENmembersareboundtocomplywiththeC
9、EN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexist
10、sinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Fin
11、land,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2002CEN Allrightsofexplo
12、itationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN122551:2002EEN122551:2002(E) 2 Contents page Foreword3 1 Scope 5 2 Normativereferences 5 3 Termsanddefinitions. .6 4 Requirements .7 4.1 Generalrequirements 7 4.2 Designrequirements . 8 4.3 Structuralrequirements . .8 4.3
13、.1 General8 4.3.2 Dimensionaltolerances .9 4.3.3 Concretetracks. .9 4.3.4 Fixingsandconnectionsbetweenequipmentandstructures 9 4.3.5 Access.9 4.3.6 Buildingventilation 10 4.3.7 Watersupplyanddrainage. 10 4.3.8 Liftingequipment. 10 4.3.9 Storageforhazardouschemicalsandfuels . 10 4.4 Requirementsforeq
14、uipment 10 4.4.1 Principlesformechanicaldesign .10 4.4.2 Generaldesignrequirements . 11 4.4.3 Environmentalimpact .15 4.4.4 Safety 15 4.4.5 Documentation.15 4.4.6 Spareparts,specialtools .15 5 Testmethods 15 5.1 Functionandperformance 15 5.2 Tightnesstestingofconcretestructures 16 5.3 Tightnesstesti
15、ngofearthenbasins . .16 5.4 Tightnesstestingofotherstructuresandequipment . 16 AnnexA (informative) Explanatorynotes . .17 AnnexB (normative) Structuraltolerances . 19 B.1 Circulartank . 19 B.1.1 Circulartankwithscraper .19 B.1.2 Circulartankwithascraperbridgetravellingonthesidewall(track). 19 B.2 R
16、ectangulartank 19 Bibliography 20EN122551:2002(E) 3 Foreword ThisEuropeanStandardhasbeenpreparedbyTechnicalCommitteeCEN/TC165“Wastewaterengineering“,the secretariatofwhichisheldbyDIN. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidenticaltextor byendorsement,at
17、thelatestbyJuly2002,andconflictingnationalstandardsshallbewithdrawnatthelatestby December2002. ItisthefirstpartpreparedbytheWorkingGroupsCEN/TC165/WG42and43relatingtothegeneralrequirements andprocessesfortreatmentplantsforatotalnumberofinhabitantsandpopulationequivalents(PT)over50.The partsoftheseri
18、esareasfollows: Part1:Generalconstructionprinciples Part3:Preliminarytreatment Part4:Primarysettlement Part5:Lagooningprocesses Part6:Activatedsludgeprocesses Part7:Biologicalfixedfilmreactors Part8:Sludgetreatmentandstorage Part9:Odourcontrolandventilation Part10:Safetyprinciples Part11:Generaldata
19、required Part12:Controlandautomation Part13:ChemicaltreatmentTreatmentofwastewaterbyprecipitation/flocculation Part14:Disinfection Part15:Measurementoftheoxygentransferincleanwaterinaerationtanksofactivatedsludgeplants Part16:Physical(mechanical)filtration 1 ) NOTE Forrequirementsonpumpinginstallati
20、onsatwastewatertreatmentplants,providedinitiallyaspart2“Pumping installationsforwastewatertreatmentplants“,seeEN7526“DrainandsewersystemsoutsidebuildingsPart6:Pumping installations“. ThepartsEN122551,EN122553toEN122558andEN1225510andEN1225511wereimplemented togetherasaEuropeanpackage(Resolution232/2
21、001takenbyCEN/TC165). 1) inpreparationEN122551:2002(E) 4 ThisEuropeanstandardislimitedtogeneralconstructionprinciples.Separatestandardsforspecialconstruction principlesforelementsofwastewatertreatmentplantsarecoveredinotherparts. SafetyprinciplesandgeneraldatarequiredarecoveredinEN1225510andEN122551
22、1. AnnexAisinformative,annexBisnormative. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing countriesareboundtoimplementthisdocument:Austria,Belgium,theCzechRepublic,Denmark,Finland,France, Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,N
23、orway,Portugal,Spain,Sweden, SwitzerlandandtheUnitedKingdom.EN122551:2002(E) 5 1Scope ThisEuropeanStandardspecifiesgeneralrequirementsforstructuresandequipmentastheyrelatetowastewater treatmentplantsforatotalpopulationofmorethan50PT. Theprimaryapplicationisdesignedforwastewatertreatmentplantsforthet
24、reatmentofdomesticandmunicipal wastewater. Requirementsforstructureswhicharenotspecificforwastewatertreatmentplantsarenotwithinthescopeofthis EuropeanStandard.OtherENscanapply. Equipmentwhichisnotsolelyusedinwastewatertreatmentplantsissubjecttotheapplicableproductstandards. However,specificrequireme
25、ntsforsuchequipmentwhenusedinwastewatertreatmentplantsareincludedinthis part. Generalprinciplesofbuildingconstruction,mechanicalandelectricalengineeringarenotsubjectofthisstandard. ThisEuropeanStandarddoesnotcoverthedesignoftreatmentprocesses. DifferencesinwastewatertreatmentthroughoutEuropehaveledt
26、oavarietyofsystemsbeingdeveloped.This standardgivesfundamentalinformationaboutthesystems;thisstandardhasnotattemptedtospecifyallavailable systems. DetailedinformationadditionaltothatcontainedinthisstandardmaybeobtainedbyreferringtotheBibliography. 2 Normativereferences ThisEuropeanStandardincorporat
27、esbydatedorundatedreference,provisionsfromotherpublications.These normativereferencesarecitedattheappropriateplacesinthetext,andthepublicationsarelistedhereafter.For datedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplytothisEuropean Standardonlywhenincorporatedinitbyamendme
28、ntorrevision.Forundatedreferencesthelatesteditionofthe publicationreferredtoapplies(includingamendments). EN7526, DrainandsewersystemsoutsidebuildingsPart6:Pumpinginstallations . EN809, PumpsandpumpunitsforliquidsCommonsafetyrequirements . EN1085, WastewatertreatmentVocabulary . EN122559, Wastewater
29、treatmentplantsPart9:Odourcontrolandventilation . EN1225510, WastewatertreatmentplantsPart10:Safetyprinciples . prEN1225512, WastewatertreatmentplantsPart12:Controlandautomation. EN600341, RotatingelectricalmachinesPart1:Ratingandperformance(IEC600341:1996,modified). EN60529, Degreesofprotectionprov
30、idedbyenclosures(IPcode)(IEC60529:1989) . ISO35061, MechanicalpropertiesofcorrosionresistantstainlesssteelfastenersPart1:Bolts,screwsandstuds . ISO35062, MechanicalpropertiesofcorrosionresistantstainlesssteelfastenersPart2:Nuts . ISO35063, Mechanicalpropertiesofcorrosionresistantstainlesssteelfasten
31、ersPart3:Setscrewsandsimilar fastenersnotundertensilestress . ISO4200, Plainendsteeltubes,weldedandseamlessGeneraltablesofdimensionsandmassesperunitlength .EN122551:2002(E) 6 3 Termsanddefinitions ForthepurposesofthisEuropeanStandard,thetermsanddefinitionsgiveninEN1085andthefollowingapply. 3.1 struc
32、ture anyconstructionanditscomponentsbuiltfortheaccommodationofequipment 3.2 equipment anycomponentwhichisinstalledin,mountedon,attachedto,oroperatedonstructures,intheperformanceoftheir intendedfunction 3.3 unit anystructureincludinganyrelatedequipmentwhichisusedasaprocessstageandwhichcanbeisolatedfr
33、om otherparallel,upstreamordownstreamstructures NOTE Examplesforaunitareagritchamber,aclarifier,anaerationtank,athickener,adigester. 3.4 assembly mechanicalequipmentthatcanberemovedandreplacedasawhole NOTE Examplesforanassemblyareapump,acompressor,agasengine,anaerator. 3.5 wastewatertreatmentplant s
34、ystemforthepurificationofwastewaterincludingstructuresandequipment 3.6 client municipality,cityorotherorganisationwhichintentstobuiltawastewatertreatmentplantorpartsthereof,orits representative 3.7 Bidder companyorotherorganisationwhichofferstobuiltaplant,ortobuiltorsupplypartsthereof 3.8 contractor
35、 companyororganisationwhichreceivedacontracttobuiltaplant,ortobuiltorsupplypartsthereof 3.9 tracks thosepartsofastructureonwhichwheelsrun 3.10 designloadingY N effectiveaverageloadingincontinuousoperationunderfullload NOTE Itisgreaterthanorequaltothevalueoftheoperatingloadingwhich,forexample,fluctua
36、tesasafunctionofthe givenload. 3.11 continuousloadbearingcapacityY C loadbearingcapacityincontinuousoperationunderfullload 3.12 maximumloadingY max peakloadingwhichistakenastheswitchoffvaluetowhich,forexample,overloadcircuitbreakersareadjustedEN122551:2002(E) 7 3.13 maximumloadbearingcapacityY B hig
37、hestpossibleloadbearingcapacitylimitedtoshorttermloadpeaks,suchasoccuronswitchingonandoff NOTE Inaddition,alarmloadingsY S,lyingbetweenthedesignloadingY NandtheswitchoffloadingY max,canbeagreed asrequired,Y NandY maxbeingstatedbytheequipmentsupplier. 3.14 utilisationfactorK A parameterfortheeffectso
38、ndriveunitsetc.,intrinsictotheiroperation NOTE UsuallyK Aincludeseitherdirectlyorindirectlyinformationontheloading,runningtimeandtemperatureandisan overallvalueoftherelationshipbetweenloadbearingcapacityandloading. 3.15 designservicelife 2) operatingtimeuntilbreakdownofamachineryelementunderdesignlo
39、ading,whichisreachedbyacertain percentageoftheelementstested NOTE asanexample,thepercentageforrollingbearingsis90%; thedesignservicelifeisdifferentfromboththewarrantytimeandanaverageservicelifeofuse,asusedforcostefficien cy calculations. 3.16 modeofoperation characteristicvaluerelatedtotheeffectsonm
40、otorsandotherelectricalcomponentsintrinsictotheiroperation(e.g. frequencyofstarts,temperatures) 3.17 degreeofprotection characteristicvaluerelatedtotheeffectsonmotorsandotherelectricalcomponentsintrinsictotheirenvironmental conditions(e.g.effectsofwaterordust) 4Requirements 4.1Generalrequirements Wa
41、stewatertreatmentplantsshallmeetthefollowingrequirements: a) nationalregulationsshallbeobserved; b) thedischargelimitsshallbemet; c) becapableofsatisfactorytreatmentofthefullrangeofflowsandloads; d)personal safety; e) nuisance,odour,noiseandtoxicity,aerosolsandfoamshallbeconsideredandshallmeettherel
42、evant requirementsaccordingtoEN122559andEN1225510; f) dangertooperatingpersonnelshallbeminimized; 2) ExplanatorynoteseeannexAEN122551:2002(E) 8 g) therequiredservicelifeandlongtermstructuralintegrityshallbeachieved,includingwaterandgas; h)tightness; i) provisionsshallbemadeforcaseofoperationandmaint
43、enance; j) provisionforfutureextensionsormodificationsoftheplantshallbeconsidered; k) thereliabilityofoperationshallbehighandriskofdangerandtheimpactofmalfunctionsshallbelimited; l) becosteffectiveinrespectoftotalcosts(capitalandoperatingcosts); m) theenergyconsumptionduringconstructionandoperationshallbeconsidered; n) thewasteproductsshallbereducedinquantityandimprovedinqualityasfarasreasonablyachievableto allowforreuseorsafedisposal. 4.2Designrequirements Thefollowingrequirementsshallbeconsideredduringthedesignstageofawastew
