15 D 端吸离心泵End suction centrifugal pump.docx
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15 D 端吸离心泵End suction centrifugal pump.docx
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15D端吸离心泵Endsuctioncentrifugalpump
SPECIFICATIONSFORENDSUCTIONVERTICALDELIVERYBACKPULL–OUTCENTRIFUGALPUMPINGSETSANDACCESSORIES
TableofContent
PageNo.
1.0PART1–GENERAL
1.1SCOPE6d-3
1.2Type6d-3
1.3UNITRESPONSIBILITY6d-3
1.4DesignRequirements6d-3
1.5CRITICALSPEEDS6d-4
1.6FACTORYTESTING6d-4
1.6.1Materials6d-4
1.6.2PerformanceTests6d-4
1.6.3HydrostaticTests6d-4
1.6.4VibrationTests6d-5
1.6.5MotorTests6d-5
1.7ENVIRONMENTALCONDITIONS6d-5
1.8Warranty6d-5
2.0PART2–PRODUCTS
2.1PUMPS6d-6
2.1.1OperatingConditions6d-6
2.1.2Speed6d-7
2.1.3Efficiency6d-8
2.1.4ConstructionMaterials6d-8
2.1.5Coupling6d-8
2.1.6PressureGauges6d-8
2.1.7Construction6d-8
2.1.8CalibrationofInstruments&Meters6d-9
2.2ELECTRICMOTORSANDLTEQUIPMENT6d-10
2.2.1Motors6d-10
2.2.2Insulation6d-10
2.2.3ThermalProtection6d-10
2.2.4SpaceHeaters6d-10
2.2.5Bearings6d-10
2.2.6MotorMounting6d-10
2.2.7Balance6d-10
2.2.8ProtectionofEnclosure6d-11
2.2.9Motor-PumpCoupling6d-11
2.2.10MotorRating6d-11
2.2.11
Revisedon29-04-2013
MotorControlCentre6d-11
PageNo.
2.2.12PanelEnclosureConstruction6d-11
2.2.13Dimensions6d-12
2.2.14ArrangementofComponentswithinEnclosures6d-12
2.2.15WiringwithintheEnclosures6d-12
2.2.16SupplyIncomingSection6d-12
2.2.17Busbars6d-13
2.2.18MotorStartingSection6d-13
2.2.19AutomaticControllers&Interlocks6d-14
2.2.20ElectricalPanelBasicElements6d-14
2.2.21MouldedCaseCircuitBreaker(Mccb)6d-14
2.2.22Contactors6d-14
2.2.23AutoTransformers(IfApplicable)6d-14
2.2.24AmmetersandVoltmeters6d-15
2.2.25Controls–IndicatorsandAlarms6d-15
2.2.26EarthingTerminals6d-15
2.2.27PowerCables6d-15
2.2.28ControlCables6d-15
2.2.29CableInstallation6d-15
2.2.30.EarthElectrodes6d-16
2.2.31EarthConductors6d-16
2.2.32ItemstobeEarthed6d-16
2.3SPARES6d-17
3.0PART3–EXECUTION
3.1INSTALLATION6d-18
3.2CERTIFICATION6d-18
3.3TESTING6d-18
SPECIFICATIONSFORENDSUCTIONVERTICALDELIVERYBACKPULL–OUTCENTRIFUGALPUMPINGSETSANDACCESSORIES
1.0PART1-GENERAL
1.1SCOPE
Eachpumpingunitshallconsistofendsuctioncentrifugalpump,coupling,squirrelcageinductionmotorandallnecessaryappurtenancestoprovideacompletepumpingsystem.Thecontractorshallrequirethatthepumpingunitsspecifiedhereintobesuppliedbyasinglemanufacturer.Thecontractorshallsupplyinstall,commissionandhandoverallequipmenttothesatisfactionoftheEngineer.
TheBiddermustvisitthesiteandinspectthespacerequirementandotherinstallationrequirementsbeforemakingthebid.
1.2Type
Eachpumpshallbeoftheendsuction,verticaldeliverycentrifugaltypewithbackpull-outfacilityforeasymaintenance.Thepumpandmotorshallbemountedonafabricatedcommonsteelbase.
1.3UNITRESPONSIBILITY
Thecontractorshallcauseallequipmentspecifiedunderthiscontracttobefurnishedbythepumpmanufacturerwhoshallberesponsiblefortheadequacyandcompatibilityofallpumpingunitcomponents.Anycomponentofeachpumpingunitnotprovidedbythepumpmanufacturershallbedesigned,fabricated,testedandinstalledbyfactoryauthorizedrepresentativesexperiencedindesignandmanufactureofsuchcomponents.Thisrequirement,however,shallnotbeconstruedasrelievingthecontractoroftheoverallresponsibilityforthisportionofwork.
1.4DesignRequirements
ThearrangementsshownonthedrawingsarebaseduponthebestinformationavailabletotheEngineeratthetimeofdesignandisnotintendedtoshowexactdimensionspeculiartoanyspecificequipmentunlessotherwiseshownorspecified.Therefore,itmaybeanticipatedthatthestructuralsupports,foundations,connectingpipingandvalvesshowninpartorwhole,mayhavetobechangedinordertoaccommodatethepumpingequipmentfurnished.Noadditionalpaymentwillbemadeforsuchchanges.AnysuchchangesshallbesubmittedtotheEngineerforhisapproval.
Pumpingunitsshallbedesignedtooperatewithoutoverloadingcavitationsordamagingvibrationatthespecifiedspeed,flowandheadconditions.Theshutoffheadoftheproposedpumpsshallbeatleast10%morethanthespecifiedheadatthespecifiedcapacity.
Motorratingshallbeatleast10%morethanthepowerrequiredbythepumpatthespecifieddutypointincaseofpumprunningsolo.Incaseofpumpsrunningparallel,ratingofeachmotorshouldbehigherthanthemaximumcapacityrequiredbyeachpump.
Thepumpbaseshallbedesignedforanchorboltingtoaconcretefoundation,assumingthatthepump,withoutrestraintatthesuctionanddischargeconnections,issubjectedtoadisplacingforceequaltothatdevelopedbyaninternalpressureequaltothreetimesshut-offheadattheoperatingspeed.
Themotorshallbeconnectedtothepumpbyasemiflexiblecoupling.
Thecompletepumpingunitshallbedesignedtooperatewithoutoverloadonanycomponentatanypointalongthepumpcurveatthespecifiedspeed.
1.5CRITICALSPEEDS
Eachcompletesystem,includingpump,motorandallappurtenances,shallhavenodangerouscriticalorresonancefrequenciesormultiplesofresonancefrequencieswithin20%aboveand35%belowtheoperatingspeedofthepump.
Forthepurposesofdesign,adangerousvibratorycriticalspeedshallbedefinedasone,whichproducesatorsionstressexceeding2.4x107Nm-2.Thecontractorshallberesponsiblefortheanalysisofcriticalspeeds,whichshallbeanalyzedandcertifiedbyaprofessionalengineerregularlyengagedinthistypeofwork.
1.6FACTORYTESTING
1.6.1Materials
Meltandstrengthtestsofthecastironusedinthemanufactureofthepumps’majorcomponentsshallbeperformedinaccordancewiththeapplicableBSstandardsasindicatedinthespecification.ThecontractorshallfurnishtheEngineerwithcertifiedcopiesoftheresultsofalltests.
1.6.2PerformanceTests
PumpshallbefactorytestedforperformanceinaccordancewithISO9906byatestingagentapprovedbytheEngineerandshallbetoaccuracyclassC.Thesuppliershallsubmitthesetestcurvespriortoshipmentoftheequipment.ThesetestcurvesshallincludeHead,Efficiency,PowerabsorbedandNPSHrequiredagainstCapacity.TheEngineershallwitnessthesetests.
Pumptobesuppliedunderthiscontractwithmotorshigherthan30kWshallbetestedwithitsdistinctivecontractmotor.
1.6.3HydrostaticTests
Eachpumpshallbehydrostaticallytested.Testpressureshallnotbelessthantwicetheshut-offheadasshownontheapprovedhead-capacitycurve.
Thetestprocedureshallbeasfollows:
Condition
Time(Minutes)
1TestPressure
180
2Atmospheric
05
3TestPressure
15
4Atmospheric
05
5TestPressure
30
Atnotimeduringthistestshallthecasingshowunduedeflectionorsignsofweaknessatanypoint,norshalltheexternalsurfacesofthecasingshowsweatingthroughporousmetalorleakingthroughgasketorcracksorotherdefects.
ThecontractorshallfurnishtheEngineerwithcertifiedresultsofthetests.
1.6.4VibrationTests
VibrationtestsshallbecarriedoutinaccordancewithISO2372–1974.
1.6.5MotorTests
MotorshallbetestedinaccordancewithNEMAandIEEEProcedures.Thetestsshallinclude,
a.RoutineTests
i.Noloadcurrent
ii.LockedRotorCurrent
iii.WindingResistance
iv.HighPotentialTest.
b.CompleteTests
i.RatedLoadTemperatureRise.
ii.Slip.
iii.LockedRotorTorque.
iv.BreakdownTorque.
v.Efficienciesat100,75and50percentofFullLoad.
vi.Powerfactorat100,75and50percentofFullLoad.
Thecontractorshallfurnishtheallcertifiedtestresultsbeforeshipment.
1.7ENVIRONMENTALCONDITIONS
Theequipmenttobeprovidedunderthiscontractshallbesuitableforinstallationandoperationatelevationsofabout………………………….M.abovesealevelinsideweatherprotectedstructures.Outsideambienttemperaturesrangebetween………and…………….0Candwatertemperaturevariesbetween…………and……………0C.
RelativeHumidityisexpectedtorangebetween…………..and100%.Atmosphereisdusty.
1.8warranty
Thecontractorshallprovidemanufacturer’swarrantytotheemployerthattheGoodsandServicesSuppliedunderthecontractwillcomplystrictlywiththeContractandshallbefirstclassineverycaseandshallbefreefromdefects.ThesupplierfurtherwarrantstothePurchaserthatallmaterials,equipmentandsuppliesfurnishedbythesupplierforthepurposeofthegoodswillbenew,merchantableofthemostsuitablegrade,andfitfortheirintendedpurposes.Thesuppliershallwarrantthattheservicestobecarriedoutunderthiscontractwillconformtogenerallyacceptedprofessionalstandardsandengineeringprincipals.
ThiswarrantyshallremainvalidfortheperiodmentionedintheDataSheet.Afterthefinalacceptance,anypartoftheequipmentwhichfailsordoesnotgivesatisfactoryperformanceduringthisperiodofwarranty,shallbereplacedwithinthenumberofdaysasmentionedintheDataSheetfromthedatetheContractorhasbeennotifiedtodoso.
Allexpensesinvolvedinthisconnectionshallbebornebythecontractorwhoshouldtakethisintoconsiderationwhenbidding.
Revisedon29-04-2013
2.0PART2–PRODUCTS
2.1PUMP
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