SN 598-2002 Catch tray in steel guideline for desi

May2002CatchtrayinsteelGuidelinefordesignandmanufactureSN598Dimensionsinmm1FieldofapplicationandpurposeThisstandardappliestoin-housemanufacturedsteelcatchtraysaspartsofplantsforthemaking,treatingandutilisationofsubstancesdangeroustowater(e.g.machinetools,hydraulicandoilsystems).Catchtraysofthiskindareusedeitherasdriptraysorascollectingdevicesprovidedtheypossesstherequiredcollectingvolumeacc.to§4VAwS(ordinancegoverninginstallationsforthehandlingandtreatmentofsubstancesdangeroustowater)(seetable1).Thefollowingdataaregivenforguidanceandprovideimportantinformationfortheappropriatemanufactureofsteeltraysbyinhouseoroutsideworkshops.InthecaseofHBVequipment(equipmentforthemaking,treatingandutilisationofsubstancesdangeroustowater)whichissubjecttomaking/utilisationbyspeciallyqualifiedcompanies,allworkmustbeperformedonlybycompaniesapprovedaccordingto§19lWHG(WaterResourcesManagementLaw).2AbbreviationsDVWK=designatesanassociationinGermanywhichdealswithwaterresourcesmanagementandagriculturalengineeringHBV=designatesequipmentforthemaking,treatingandutilisationofsubstancesdangeroustowaterR2=storagecapacityforthevolumeofliquidsdangeroustowaterwhichcanbereleasedincaseoffailureswithouttakingcorrectivemeasuresintoaccountVAwS=designatesanordinanceconcerningequipmentforthehandlingofsubstancesdangeroustowaterWGK=designatesthewaterhazardclassWHG=WaterResourcesManagementLaw3SizeofthecatchtrayAreaofthetraybasexRaisededges-Theinsidebasearea(lengthlbywidthb)mustbesodimensionedthattheareabelowforwhichthetrayhasbeenprovided,iseffectivelyprotectedagainstsubstancesdangeroustowater;sprayanddriplossesmustbereliablycaughtandkeptbythetray.-Theedge-raisinghmustbeatleast5cm.-driptraysshouldbemanufacturedwithaminimumedgeraisingof5cm.-TheedgeraisinghofcatchtraysusedascollectorsonHBVequipmentiscalculatedasfollows:h=hR+hFhR:edgeraisingresultingfromtherequiredcollectingvolumeacc.toTable1andtheselectedarea.Theedgeraisingoftrayswithopengridmustbecalculatedonlyuptothebottomedgeofthegrid.hF:additionallyrequirededgeraisingofatleast2cm,theso-calledfreeboard.Example:Hydraulicsystemwith1m³ofhydraulicoil,WGK2=R2=1m3Protectedarea:2,5mx2mR2=lxbxhRhR==hR=0,2mh=hR+hF=0.2m+0.02m=0.22mResult:Therequiredtraymusthaveabaselengthof2.5m,abasewidthof2mandanedgeraisingofatleast0.22m.Continuedonpages2and3Bearbeitet:Normung/Standardisierung18.01.10RaisededgehLengthlhFhRLengthlWidthbR2lxb1m³2.5mx2.0mNoguaranteecanbegiveninrespectofthistranslationInallcasesthelatestGerman-languageversionofthisstandardshallbetakenasauthoritativeThiscopywillnotbeupdatedincaseofchanges!Page2SN598:2002-05Collectionvolumerequiredaccordingtotheannexto§4modelVAwSordinanceforHBVequipmentTable1Capacityinm3WGK0WGK1WGK2WGK3≤0,1R0R0R2R20,1≤1R0R1R2R21≤10R0R1R2R210≤100R0R1R2R2100≤1000R0R1R2R21000R0R2R2R2R0:noretainingcapacityrequiredR1:leakagevolumepossibleuntilsafetymeasures/equipmentbecomeeffectiveR2:leakagevolumewithouttakingcorrectivemeasuresintoaccount.Importantnote:InanumberofGermanfederalstates/countriesdifferentdataareapplicable!ComparisonwiththedataoftheVAwSordinancesoftherespectiveGermanfederalstatesisabsolutelynecessary.4MaterialsThefollowingmaterialsmustbeusedfortheplatesofthecatchtrays:-Stainlesssteelacc.toqualitystandardDINEN10088-2,DINEN10029(e.g.X5CrNi18-10,materialno.1.4301)-engineeringsteel/boilerplateacc.toqualitystandardDINEN10025,DINEN10029(e.g.S235JRG2,materialno.1.0038)ThematerialresistanceofsteelagainstliquidsdangeroustowaterhastobedeterminedasspecifiedinDIN6601.(materialremoval≤0.1mmperyear).Ifthiscannotbeproven,anamountofmaterialremovalof0.1mmisalsoregardedasresistantforthedurationofloading.Formationoflocalcorrosionmustbeavoided.Platethickness:Recommendationacc.toDVWK132,stainlesssteel≥3mmengineeringsteel/boilerplate≥6mm5CorrosionprotectionTheuseofstainlesssteelisrecommended.Engineeringsteels/boilerplateswhichtendtocorrodeundertheinfluenceofmoisture,mustbeprotectedbysurfacetreatmentasspecifiedinSN200-7orDINENISO1461(e.g.bycoating,galvanizing).6Manufacture6.1Driptrays...mustbemanufacturedbyasuitablyqualifiedweldingshop.-Thedriptrayplatesmustbeweldedupliquid-tight.-Weldseaminspection(visualinspection)mustbemadeasspecifiedinDINEN970.6.2Catchtrays...usedascollectorsonHBVequipmentmustbemanufacturedonlybyapprovedworkshopswithspecialqualificationasin§19lWHG.-Thecatchtrayplatesmustbeweldedupliquid-tight.-ManualweldingmustbecarriedoutonlybyweldersexaminedonthebasisofDINEN287-1.-WeldedjointsmustbemadeasspecifiedinDINEN287and288.-Theuseoftherightelectrodematerialandtools/workingsubstancesisparticularlyimportant.-Theuseofscrewedconnectionswithsealsisnotpermittedintheareasbelowthemaximumliquidlevelinthetray.-Uponcompletionoftraymanufacture,aweldseaminspection(visualinspection)andleakagetestmustbemadebyNDTanddocumented.-Methodoftheleakagetest:-dye-penetrantinspectionasinDINEN571-1,DINEN1289-vacuumtesting-orotherequivalentmethodsPage3SN598:2002-057ApplicablestandardsandordinancesDIN6601Resistanceofmaterialsofsteeltanksagainstliquids(positive-listofliquids)DINEN287-1Approvaltestingofwelder