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Foreword

ThiscodeisdevelopedbySinopecShanghaiEngineeringCo.,LtdincooperationwithotherinvolvedorganizationsbasedontherequirementsofDocumentJIANBIAO〔2009〕No.88issuedbytheMinistryofHousingandUrban-RuralDevelopmentofthePeople'sRepublicofChina-NoticeonPrintingtheDevelopmentandRevisionPlanofNationalEngineeringConstruction$tandardsin2009.

Inpreparingthiscode,thedevelopmentteammadespecialstudiesandextensiveinvestigations,summarizedthepracticesontherotarymachinedesigninrecenttenyears,solicitedthecommentsfromthedesigners,manufacturers,usersanderectors,discussedtheThiscodecomprises12chaptersand1appendix,andmainlycoversgeneralprovisions,terms,basicrequirements,pumpsandhydraulicturbines,agitators,vacuumpumps,CompressorsandFans,steamturbines,expandersandgasturbines,centrifuges,accessories,inspectionandtesting,andpainting,markingPackagingandshipment.

MinistryofHousingandUrban-RuralDevelopmentofthePeople'sRepublicofChinaisinchargeofadministrationofthiscode.ChinaPetroleumandChemicalCorporationisresponsibleforitsroutinemanagement.SinopecShanghaiEngineeringC?.,Ltdistaskedforexplanationofspecifictechnicalcontents.Allrelevantorganizationsarekindlyrequestedtosumupyourexperiencesinactualpracticesduringtheprocessofimplementingthiscode.TherelevantcommentsandinformationcanbepostedorpassedontoSinopecShanghaiEngineeringCo.,Ltd(Address:769ZhangyangRd.,PudongNewArea,Shanghai,Postcode:200120)asareferenceforrevisingthiscodeinthefuture.

Chiefdevelopmentorganization,participatingdevelopmentorganizations,participatingorganiza-tions,chiefdraftersandchiefreviewersstaffofthiscode:

ChiefDevelopmentOrganization:

SinopecShanghaiEngineeringCo.,Ltd

ParticipatingDevelopmentOrganizations:

SinopecLuoyangPetrochemicalEngineeringCorporation

SinopecEngineeringIncorporation

ChinaHuanqiuContracting&.EngineeringCorp.

SinopecNingboEngineeringCo.,Ltd

ChinaChengdaEngineeringCo.,Ltd

SinopecNanjingEngineeringCo.,Ltd

ParticipatingOrganizations:

HangzhouSteamTurbineCo.,Ltd

Sulzer(Dalian)PumpsandCompressorsLtd

DalianHermeticPumpCo.,Ltd

MiltonRoyIndustrial(Shanghai)Co.,Ltd

GardnerDenverNashMachineryLtd(GDNC)

SichuanSunnySealCo.,Ltd

DalianDeepBluePumpCo.,Ltd

ShanghaiMarineDieselEngineResearchInstitute

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ShanghaiNikkisoNon-sealPumpCo.,Ltd

GuangdongKenfloPumpCo.,Ltd

EagleBurgmannChina

ChiefDrafters:

ChenWeiJiangGuoYangChengjiongZhangJing'anYuePing

XingGuikunHuangShuilongQiMingguiYangLiminSuYanchuZhangYibingCaoYongjunWangGangWangChunmao

ChiefReviewers:

FanDemingGeChunyuYeWenbangZhangXiufengZhaoXianqiLiYanbinCenQishunHuangGuangZhouYoushiSongSiyuan

YangYanhongZouLiliGuoWeiRenJiminZhangYouhuaXiaoHaitaoLuZhengLiShixiongKuangGuojunShiLing

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Contents

1GeneralProvisions (1)

2Terms (2)

3BasicRequirements (3)

3.1GeneralRequirements (3)

3.2AllowableWorkingPressureandAllowableWorkingTemperatureofRotaryMachines (4)

3.3Inlets,OutletsandOtherConnections (4)

3.4Materials (5)

3.5Noises (7)

3.6SpareParts (7)

3.7SpecialTools (8)

4PumpsandHydraulicTurbines (9)

4.1GeneralRequirements (9)

4.2CentrifugalPumps (9)

4.3ReciprocatingPumps,MeteringPumpsandRotaryPump (10)

4.4PneumaticDiaphragmPumps (11)

4.5HydraulicPowerRecoveryTurbines (11)

5Agitators (13)

6VacuumPumps (14)

6.1GeneralRequirements (14)

6.2ReciprocatingVacuumPumps (14)

6.3RotaryVaneVacuumPumps (15)

6.4ScrewVacuumPumps (15)

6.5RootsVacuumPumps (15)

6.6LiquidRingVacuumPumps (16)

7CompressorsandFans (17)

7.1GeneralRequirements (17)

7.2CentrifugalandAxialFlowCompressors (18)

7.3ReciprocatingCompressors (19)

7.4RotaryCompressors (21)

7.5CentrifugalFans (21)

7.6RootsBlowers (22)

8SteamTurbines,ExpandersandGasTurbines (23)

8.1GeneralRequirements (23)

8.2SteamTurbines (23)

8.3Expanders (24)

8.4GasTurbines (25)

9Centrifuges (27)

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9.1GeneralRequirements (27)

9.2FiltrationCentrifuges (27)

9.3DecanterCentrifuges (27)

10Accessories (29)

10.1Drivers (29)

10.2GearUnitsandHydraulicCouplers (29)

10.3CouplingsandGuards (29)

10.4Lube,SealOilandOil-controlSystems (29)

10.5Baseplates (30)

10.6ControlsandInstrument (31)

10.7PipingandAppurtenances (31)

11InspectionandTesting (33)

11.1GeneralRequirements (33)

11.2Inspection (33)

11.3Testing (34)

12Painting,Marking,PackagingandShipment (35)

12.1Painting (35)

12.2NameplatesandRotationArrows 2………………(35)

12.3Marking (35)

12.4PackagingandShipment (36)

AppendixAApplicableStandardsandPressureRatingsforFlanges (37)

ExplanationofWordinginThisCode (38)

ListofQuotedStandards (39)

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1GeneralProvisions

1.0.1Thiscodeisdevelopedforthepurposesofensuringtherotarymachinesforpetrochemicalserviceinlong-term,stableandsafeoperationandsatisfyingenergyconservationandenvironmentprotectionrequirements.

1.0.2Thiscodeisapplicableforthedesignofrotarymachinesforpetrochemicalservice.

1.0.3Inadditiontothiscode,thedesignofrotarymachinesforpetrochemicalserviceshallalsocomplywiththecurrentapplicablenationalcodesandstandards.

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2Terms

2.0.1Rotarymachines

Rotatingequipmentusedinvariousprocessandutilitiesinpetrochemicalplants.

2.0.2Pumps

Machinesusedfortransferringorboostingliquids.

2.0.3Hydraulicpowerrecoveryturbines

Machinesusedtorecovertheenergyfromliquidpressuredropinindustrialproductionplants,alsoknownashydraulicpowerrecoveryturbines.

2.0.4Mechanicalagitators

Machinescomprisingagitatingimpellers,agitatingshafts,shaftsealsystemsanddrivingequipment(drivers,gearunits,framesandcouplings).

2.0.5Vacuumpumps

Machinesusedtodrawvaporoutofcontainer,creatingavacuuminside.

2.0.6Compressors

Fluidmachinesusedtoincreasegaspressureenergyandtransfergaswithoutletpressurelargerthan0.2MPa(G)orcompressionratiolargerthan3.

2.0.7Fans

Fluidmachinesusedtoincreasegaspressureanddeliverthegas.Themachineswithoutletpressurelessthanorequalto0.03MPa(G)orcompressionratiolessthanorequalto1.3aredefinedasfans(includinginduceddraftfans),andthemachineswithoutletpressurehigherthan0.03MPa(G)butlessthan0.2MPa(G)orcompressionratiolargerthan1.3butlessthanorequalto3aredefinedasforceddraftblowers.

2.0.8Steamturbines

Machinesusingsteamexpansiontodowork.

2.0.9Expanders

Machinesusinggasexpansiontodoworkforenergyrecovery.

2.0.10Gasturbines

Machinesusingexpansionofhightemperatureandhighpressuregasgeneratedfromfuelcombustiontodowork.

2.0.11Centrifuges

Machinesusingcentrifugeforcetoseparateliquidandsolidparticlesornon-compatibleliquids.

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3BasicRequirements

3.1GeneralRequirements

3.1.1Therotarymachinesusedforpetrochemicalserviceshallbedesignedandconstructedforaminimumservicelifeof20years(excludingthewearingparts),andtheuninterruptedoperationcyclesshallbenolessthantheserviceyearsindicatedinTable3.1.1.

Table3.1.1UninterruptedOperationCycleofRotaryMachinesUsedforPetrochemicalService

Category

Uninterrupted

operationcycle(years)

Category

Uninterrupted

operationcycle(years)

Pumps

3

Reciproeatingcompressors

3

Hydraulicpowerrecoveryturbines

3

Rotarycompressors

3

Vacuumpumps

3

General-purposesteamturbines

3

Agitators

2

Specialpurposesteamturbines

5

Centrifugalfans

3

Expanders

3

Instrumentaircentrifugalcompressor

3

Gasturbines

3

Processcentrifugalcompressors

5

Rootsblowers

3

Centrifuges

2

一

Note:inspecialconditions,theuninterruptedoperationcycleofrotarymachinesmaybemutuallyagreed.

3.1.2Therotarymachinesshallbewithinthescopeoftheirdesignandmanufactureexperience,andatleastonesameorsimilarmodelrotarymachinehavebeenrunningsuccessfullyundersameorsimilaroperatingconditionsfortwoyearsormore.

3.1.3On-linesparesshallbeprovidedforthepumps,medium-andsmall-sizefans/blowers,instrumentaircentrifugalcompressorsandreciprocatingcompressorsincontinuousoperation,oneon-linespareshallbeprovidedforthesinglepump(rotarymachine),andatleastoneon-linespareshallbeprovidedforseveralpumps(rotarymachines)arrangedinparalleloperation.Off-linesparepartsshallbeprovidedfortheagitatorsincontinuousoperation.On-linesparesmaynotbeprovidedforthelarge-sizefans/blowers,centrifugalcompressorsandgasturbines,butlongtermpartsshouldbeprovidedascritical/capitalsparepartsforthem.

3.1.4WhenthemediumcontainH?S,chlorideorothercomponentsthatmayresultinstresscorrosion,orthemediumcontainanycomponentsthatmaybesubjecttoreactionwithcopperorcopperalloy,theyshallbeindicatedinthedatasheetsortechnicalrequisitiondocuments.Theconstructionmaterialsofrotarymachinesshallbesuitablefortherequirementsforthesemedium.

3.1.5Thecompleteunitofrotarymachineshallincludeallequipment,pipes,valves,electrical,instrumentandcontrolsystemswithinthescopeofsupply.

3.1.6Thedesignpressureofsteamjacketandcoolingwaterjacketshallbenolessthanthemaximumworkingpressureoftheirrespectiveexternalsupplysystems.

3.1.7Theminimumtemperatureriseatthewatersideofcoolingsystemshallcomplywiththe

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utilitiesconditions.Whengascoolerisused,theminimumtemperatureriseshallbeatleastequalto8℃,andwhenoilcoolerisused,theminimumtemperatureriseshallbeatleastequalto4℃.

3.1.8Thegeneraldesignofrotarymachinesshallbeeasyforoperationandmaintenance,theconstructiondesignshouldalloweasydismantlingofrotorswithoutremovingtheprocesspipesonthecasings,andtheengineeringdesignshallprovidesufficientspacesandaccessesandshallbeeasyforequipmentandpipemaintenance,hotinsulation,coldinsulationandpersonnelprotectioninsulationinstallation.

3.1.9Therotarymachinesshouldbeshippedascompleteunits.Foroversizeequipment,theymaybeshippedbysegments.Forfragileparts,theymayberemovedaftertest,andthenshippedinseparate,andthematingsurfacesshallbemarked.Allfragilepartsshallbespecifiedintheinstallationmanuals.

3.2AllowableWorkingPressureandAllowable

WorkingTemperatureofRotaryMachines

3.2.1Theallowableworkingpressureandallowableworkingtemperatureofrotarymachinesshallbe

determinedbasedontheprocessoperatingconditionsanddesignparametersofrotarymachines.

3.2.2Themaximumallowableworkingpressureofpressure-containingcasingsshallconformtoTable3.2.2,andshallmatchwithpressureratingsofadjacentflanges.

Table3.2.2MaximumAllowableWorkingPressureofPressure-containingCasing

Category

Maximumallowableworkingpressure

Rotarymachineswithoutpressurereliefdevices

≥themaximumoutletpressureplus10%pressuredifferencebetweeninletandoutlet

Rotarymachineswithpressurereliefdevicessuchaspressurereliefvalves

≥110%ofthereleasepressureofthepressurereliefvalve

Note:thereleasepressureofpressurereliefvalveistakenas1.05-1.15timesmaximumworkingpressure.

3.2.3Fortherotarymachinesinstalledindoorsorhot(or/cold)insulated,themaximum(orminimum)allowableworkingtemperatureoftheirpressure-containingcasingsshallbedeterminedinaccordancewithTable3.2.3.

Table3.2.3Maximum(orMinimum)AllowableWorkingTemperature(t)of

Pressure-containingCasings

t?MediumTemperature,t

Max.(orMin.)AllowableWorkingTemperature

to≤0

Theminimumworkingtemperatureofthemedium

to>0

Themaximumexpectedworkingtemperatureorratedworkingtemperatureplus10℃,whicheverishigher

3.2.4Fortherotarymachinesinstalledoutdoorswithoutinsulation,theirminimumallowableworkingtemperatureshallbedeterminedbasedontheminimumambienttemperaturespecifiedinutilitiesconditions.

3.3Inlets,OutletsandOtherConnections

3.3.1Theinlets,outletsandotherconnectionsofrotarymachinesshallbeflanged,andtheflangestandardsandpressureratingshallbespecifiedintheinquiriesordatasheets.

3.3.2Theconnectionswithintherotarymachinesmayuseotherflangestandardsbeyondthosespecifiedintheinquiriesordatasheets,theapplicablestandardsandnominalpressureratingsfor

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flangesmayfollowAppendixAofthiscode.

3.4Materials

3.4.1Theconstructionmaterialsofrotarymachinesshallcomplywiththefollowingrequirements:

1Thematerialrequirementsforthepressure-containingpartsandothermaincomponentsofrotarymachinesshallbespecifiedintheinquiriesordatasheets,finalmaterialselectionshallbespecifiedintheproposalsofthemanufacturers,andspecificmaterialcodesshallbeindicatedinthedatasheets.

2Weldedpressure-containingpartsshallbesubjecttopostweldheattreatmentandnondestructivetest.

3Exceptforcaststeelparts,repairweldingshallnotbemadeonallpressure-containingcastparts.Ifrepairweldingisrequiredforcaststeelparts,itshallcomplywithArticle11.2.3ofthiscode.

4Ifthespecifiedminimumdesignmetaltemperatureislowerthan-20℃,lowtemperatureimpacttestshallbemadeforthebasemetalandweldsofallpressure-containingsteelsexceptforausteniticstainlesssteel.

5Ifchloridesarepresentinthemedium,thecomponentmaterialsincontactwiththemediumshouldnotbealuminumandausteniticstainlesssteel.

6Whenthemediumcontactwithcopperandthengenerateexplosivecoppercompounds,copperorcopperalloyshallnotbeusedtofabricatetheparts.

7ThematerialsexposedinacidenvironmentorwetH?S-containingenvironmentshallcomplywiththerequirementsspecifiedinthecurrentnationalstandardGB/T20972.1PetroleumandNaturalGasIndustries-MaterialsforUseinH?S-containingEnvironmentsinOilandGasProduction-Part1:

GeneralPrinciplesforSelectionofCracking-resistantMaterials.

8Gasketsandsealringsshallnotcontainanyasbestos.

9Hygroscopicmaterialsshallnotbeusedforsoundinsulationmaterials.

10Materialcorrosion-resistantperformanceshouldnotbeenhancedbyusingsurfaceplatingandsurfacecoating.

11Materialsforlubeoil,sealoil,sealflushinganddrygassealpipingandfittingsshallbe304or

316stainlesssteel.

12Fortheweldsthatareimpossibleforinspectionduringfabricationorafterfabrication,separatequalitycontrolmethodsshallbedetermined.

3.4.2InadditiontotherequirementsspecifiedinArticle3.4.1ofthiscode,theconstructionmaterialsofpumpsshallalsocomplywiththefollowingtherequirements:

1Castironshallnotbeusedforpressure-containingpartsofpumpsfortoxic,flammableandexplosiveliquidservices.Castironshallnotbeusedforcentrifugalpumpsandrotarypumpsfortoxic,flammableandexplosiveliquidservices,includingseallesscentrifugalpumps,andtheirbearinghousings.

2Unlessotherwisespecified,thecorrosionallowanceofpumpcasingsshallbeatleastequalto3.0mm.

3Thelinersofcannedpumpsshallbemadeofnonmagneticmaterialsandshallhavegoodcorrosionresistanceandhighstrength,statorlinershouldbeHastelloyalloy,itsminimumthicknessshallbe0.4mmandcorrosionallowanceshallbe0.15mm.Thecontainmentshellofmagneticdrivepumpshallbehigh-resistivitymaterials,Hastelloyalloyandtitaniumalloyshouldbeselected,its

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minimumthicknessshallbe1mmanditscorrosionallowanceshallbe0.4mm.Formedium-andlight-dutymagneticdrivepumpsusedformediumservicewithtemperaturelowerthan120℃,theircontainmentshellsmaybenon-metalmaterialssuchasplasticsorceramics.

4Fornon-metalpumps,theirallowableworkingtemperatureshallmeetthespecialperformancerequirementssuchasmaterialthermalexpansioncoefficient,hightemperature"creep"ofplasticmaterialsandlowtemperaturecracking.Themaximumallowableworkingtemperatureofnon-metalpumpsshallbeoftheultimateheat-resistanttemperatureofthematerials.

5Thediaphragmmaterialsofpneumaticdiaphragmpumpsshallhavereliablechemicalstability,andtheworkingtemperatureshallbelessthantheultimateheat-resistanttemperatureofthediaphragmmaterials.

3.4.3InadditiontotherequirementsspecifiedinArticle3.4.1ofthiscode,theconstructionmaterialsofagitatorsshallalsocomplywiththefollowingrequirements

1Thecorrosionallowanceofagitatorshaftsandimpellersshallbeatleastequalto1.0mm.

2Theagitatorimpellersandshaftscontactingwithmediumsshallbenotlowerthanmaterialsgradeofthevessels.

3Locknuts,springwashers,lockpinsandmetallockwiresshallbeausteniticstainlesssteelorhighermaterials.Thematerialgradeoflocknutsandspringwasherscontactingwiththemediumshallbenotlowerthantheagitatorimpellers.Themetallockwirescontactingwiththemediumshouldbetitanium.

3.4.4InadditiontotherequirementsspecifiedinArticle3.4.1ofthiscode,theconstructionmaterialsofcompressorsshallalsocomplywiththefollowingrequirements:

1Thecasingmaterialsofcentrifugalandrotarycompressorsforflammableandtoxicgasservicesshallbeatleastcarbonsteel.

2Thecasingmaterialsofcentrifugalcompressorsforairornon-flammablegasservicesmaybeductileiron;however,themaximumoutletpressureofthecompressorsshallbelessthanorequaltothemaximumallowablepressureofPN50flangesatthedeliveredmediumtemperature.

3Thecasingmaterialsofrotarycompressorsforairornon-flammablegasservicesmaybeductileiron;however,themaximumoutletpressureofthecompressorsshallbelessthanorequalto

1.0MPa,andthemaximumoutlettemperatureshallbelessthanorequalto250℃.

3.4.5InadditiontotherequirementsspecifiedinArticle3.4.1ofthiscode,theconstructionmaterialsofsteamturbinesshallalsocomplywiththefollowingrequirements:

1Forsteampressureofgreaterthan0.52MPa(G)orsteamtemperatureofhigherthan230℃,allthepressure-containingpartsshallbeofsteel.

2Formaximumsteamtemperatureofhigherthan410℃,allthepressure-containingpartsshallbeofalloysteel.

3Materialforturbineshaftsandwheelsshallbeforgedsteel.

4Thenozzles,closingpieces,rotatingandstationaryblades,shrouding,andsteamstrainersshouldbeof11%to13%chromiumsteel,titanium,ornickel-copperalloy.

3.4.6InadditiontotherequirementsspecifiedinArticle3.4.1ofthiscode,theconstructionmaterialsofexpandersusedinthefollowingplantsshallalsocomplywiththefollowingrequirements:

1Forexpandersusedinairseparationplants,themainshaftsshallbealloysteel,theimpellersshallbecastaluminumandwroughtaluminum,andtheyshallbesubjecttoanodicoxidationtreatment

·7·

afterfabrication.

2Forexpandersoffluegasenergyrecoveryunitusedincatalyticcrackingplants,thematerialsofmainpartsofexpandersatvariousinlettemperaturesshallbeselectedinaccordancewithTable3.4.6.

Table3.4.6MaterialsofMainPartsofExpander

Inletfluegastemperature(℃)

Materialofstatorblade

Materialofmovingblade

Materialofdisc

500-600

K213

K213

20Cr3MoWV

601-650

K213

K213

GH2132

651-730

K213

864alloy

864alloy

3Ifthefluidcontainsdustandparticles,anti-erosionmeasuresshallbeprovidedtomitigateerosiontoguidevanesandstatorvanes.

4480m/s.Inairseparationplants,iftheexpanderimpellersarealuminum,thelinearspeedshallbelessthanorequalto270m/s,iftheimpellersarewroughtaluminum,thelinearspeedshallbelessthanorequalto480m/s.

3.4.7InadditiontotherequirementsspecifiedinArticle3.4.1ofthiscode,theconstructionmaterialsofgasturbinesshallalsocomplywiththefollowingrequirements:

1Thematerialoffuelgaspipeswithingasturbineunitshallbeatleast316Lstainlesssteel,andpipeweldsshallbe100%NDTtested.

2Theinternalsoffuelgasfiltersshallbeofstainlesssteel.

3.5Noises

3.5.1Effectivemeasuresshallbetaken/forthemainnoisesourcestocontrolthenoisetominimumlevels.Onthepremiseofmeetingsafetyandprocessflow,provisionsshouldbemadefornoisereductionsuchasnoiseabsorption,noiseeliminationandvibrationdamping.Acousticenclosuresshouldnotbeused.Whensoundinsulationhoodsareused,ventilationdevicesshallbeprovided,andthedesignofventilationdevicesshallbefacilitateunitmaintenance.

3.5.2Theoverallnoiselevel(A-weightedsoundpressurelevel)measuredat1mfromtheunitshallnotexceedthelimitvaluesshowninTable3.5.2.

Table3.5.2HealthLimitsforNoiseLevelsinWorkplaces

Dailynoiseexposuretime,h

Healthlimit,dB(A)

8

85

4

88

2

91

1

94

0.5

97

Note:thedatainthistableiscalculatedbyusingtheformulainthecurrentindustrialstandardGB/T189.8MeasurementofPhysicalAgentsinWorkplace-Part8:NoiseandinaccordancewiththecurrentnationalstandardGBZ2.2OcupationalEzrposureLimitsfor

HazardousAgentsinWorkplace-Part2:PhysicalAgents,Article11.2.

3.6SpareParts

3.6.1Thesparepartsshallbeinterchangeable.

3.6.2Inspection,testandacceptanceofsparepartsshallbecarriedoutinaccordancewiththe

·8·

correspondingtechnicalrequirementsorspecificationsfortherotarymachines.

3.6.3Therequirementsandnumberofsparepartsshallbedeterminedbasedonthefollowingprinciples:

1Thecriticalityandoperationcasesofrotarymachinesintheplant,andinstalledsparerequiredornot;

2Thecriticalityofeachpartinrotarymachine,theproportionofthepriceofexpensivepartoutofthelossofplantshutdownduetodamageofthepart;

3Theinterchangeabilityofwearpartsofsameorsimilarrotarymachinesortherotarymachinesinonetrain;

4Theavailabilityofthesparepartsintheregionorcountrywherethecontractplantissited,andtheprocurementandthedeliverytimeofthespareparts.

3.7SpecialTools

3.7.1Ifspecialtoolsandixturesarerequiredtodisassemble,assembletheunit,theyshallbefurnishedaspartoftheinitialsupplyofthemachineattachedwiththelist.

3.7.2Thespecialtoolsshallbeseparatelypackagedintometalboxes,andeachtoolshallbestampedorlabeledtoindicateitsservice.

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4PumpsandHydraulicTurbines

4.1GeneralRequirements

4.1.1Pumptypesshallbedeterminedbasedonoperatingparametersandmediumcharacteristics,andmaybedeterminedbasedontheprovensuccessfulexperienceinsimilarcases.

4.1.2Whenselectingpumps,centrifugalpumpsshouldbepreferablyselected.Whenthemediumviscosityislargerthanorequalsto100MPa·s,displacementtypepumpshouldbeselected.

4.1.3Whentheoperatingparametersarelowflowandhighhead,pumpsshouldbeselectedinthefollowingorder:

1High-speedcentrifugalpump,pitottubepump;

2Rotarypump,reciprocatingpump;

3Multi-stagecentrifugalpump;

4Vortexpumpmaybeselectedwithlowercavitationstendency.

4.1.4Ifmeteringisrequired,meteringpumpshallbeselected.

4.1.5Centrifugalpumpandrotarypumpshallbeequippedwithcartridgemechanicalseals.ThesealsandsealingsystemsshallbeselectedaccordingtoSH/T3156EngineeringSpecificationofPump-shaftSealSystemsofCentrifugalandRotaryPumpsforPetrochemicalIndustry.

4.2CentrifugalPumps

4.2.1Forcentrifugalpumpshandlingnon-hazardousfluidslinpetrochemicalindustry,whenthefollowingoperatingconditionsaremet,centrifugalpumpsformedium-andlight-dutyservicesshouldbeselectedandshallconformtothecurrentindustrialstandardSH/T3140TechnicalSpecificationonCentrifugalPumpsforMedium-andLight-dutyServicesinPetrochemicalIndustry,otherwise,centrifugalpumpsforheavy-dutyservicesshouldbeselectedandshallconformtothecurrentindustrialstandardSH/T3139TechnicalSpecificationonCentrifugalPumpsforHeavy-dutyServicesinPetrochemicalIndustry.

1Rateddischargepressure:≤1.9MPa(G).

2Pumpingtemperature(liquidtemperature):<225℃.

3Ratedrotatedspeedformotor-drivenpumps:≤3000r/min,theratedrotatedspeedmaybeincreasedby5%forturbine-drivenpumps.

4Ratedhead:≤120m.

5Maximumsuctionpressure:≤0.5MPa(G).

6Maximumimpellerdiameterforoverhungpumps:≤330mm.

4.2.2Forcentrifugalpumpshandlinghazardousfluids,centrifugalpumpswithshaftsealforheavy-dutyservicesorseallessseallesscentrifugalpumpsshouldbeselected.Centrifugalpumpswithshaftsealforheavy-dutyservicesshallconformtothecurrentindustrialstandardSH/T3139TechnicalSpecificationonCentrifugalPumpsforHeavy-dutyServicesinPetr