SHS0103092阀门维护检修规程.docx
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SHS0103092阀门维护检修规程
SHS01030-92阀门维护检
修规程
本英文版为内部资料，仅供参考，以中
文版为准。
MaintenanceandServiceProcedureforPetrochemicalEquipment-GeneralEquipment
MaintenanceandServiceProcedureforValves
阀门爱护检修规程
SHS01030-92
（ForTrialImplementation）
PromulgatedbySINOPEC
SINOPECPublishingHouse
Contents
1.General
2.PeriodandContentofMaintenance
3.MaintenanceandQualityStandard
4.TestingandAcceptance
5.ServiceandTroubleshooting
AppendixAOptionofMaterialsforAbrasiveTools（ForReference）
AppendixBCodesandApplicationRangesofAbrasiveMaterials
AppendixCSizeRangesofAbrasiveMaterials（ForReference）
AppendixDOptionofFlanges,BoltsandGaskets（ForReference）
AppendixEOptionofCommonPackings
1.General
1.1SubjectMatterandApplicationRange
1.1.1InthisProceduretheperiodandcontentofthemaintenance,maintenanceandqualitystandard,testingandacceptanee,serviceandtroubleshootingofgeneral-purposevalvesaredefinedordescribed.
1.1.2ThisProcedureisapplicabletosuchgatevalves,stopvalves,ballvalves,butterflyvalves,checkvaluesandsafetyvalvesthatareusedinthePetrochemicalindustrywiththemax.workingpressurebeing98.1MPa（gaugepressure）andtheworkingtemperaturerangingfrom-196to+850C.
1.2RefereneeforPreparation
SY-21019-73MaintenanceandServiceProcedureforValvesofRefineries
GB12241-12243-89SafetyValves
ZBJ16-006-89TestsandChecksofValves.
2.PeriodandContentofMaintenance
2.1MaintenancePeriod
Themaintenanceperiodofvalvesshallbedeterminedbyallenterprisesthemselvesinaccordaneewiththefeaturesoftheproductionplant,performancesofthemedium,corrosionspeedandoperatingcycle.
2.2MaintenanceContent
2.2.1Cleanandcheckthevalvebodyandpartialvalveparts.
2.2.2Replaceorrepairpartialvalveparts.
2.2.3Lapthesealsurface.
2.2.4Repairthesurfacesofthespacerflangeandendflange.
2.2.5Replaceoraddthepacking,replacethegasket.
3.MaintenanceandQualityStandard
3.1PreparatoryWorkforMaintenance.
3.1.1Getreadyallrelatedtechnicaldocuments.
3.1.2Getreadyallnecessarymachinesandtools,measuringtoolsandmaterials.
3.1.3Thoroughlyremovethevalvemediumaspertherelatedregulationsonsafety.
3.2GeneralRequirements.
3.2.1Thereshallbealabelhungonthevalve,indicatingthemaintenanceno.workingpressure,workingtemperatureandmedium.
3.2.2Forremovedpartswhichhavespecialrequirementsforthedirectionandposition,suchdirectionandlocationshallbecheckedforcorrectnessormarkedout.
3.2.3Cleanallthevalveparts,removingallcontaminantsfromthem.
3.2.4Replaceallthenon-metallicsealsurfacesthataredamaged.
3.2.5Forcorrectselectionanduseofthematerialsforabrasivetoolsandabrasivematerials,refertoAppendicesA（ForReferenee）,B（ForReferenee）andC（ForReferenee）respectively.
3.2.6Forboltsandgasketstheworkingtemperatureofwhichisabove250C,appropriateanti-seizureagentshallbeappliedonthem.
3.2.7Coppergasketsshallbeannealedbeforeinstallation.
3.2.8Allboltsshallbeinstalledneatly.Forgatevalvesandstopvalves,theboltsofthespacerflangesshallbetightenedwhenthevalvesareintheopenstate.
3.3QualitystandardofMaintenance
3.3.1Thevalvenameplateshallremainintactandtheleadsealofthesafetyvalveshallkeepsoundandperfect.
3.3.2Thevalvecastingshallhavenosuchdefectsascracks,seriousshrinkagecavitiesandslaginclusion.
3.3.3Thesurfaceofthevalveforgingtobemachinedshallhavenosuchdefectsassandwiching,double-skin,crackingandblackspots.
3.3.4Theweldjointofvalveweldmentshallhavenosuchdefectsascracks,sluginclusion,gasholes,andpoorformation.
3.3.5Theboltofthevalveshallnotbeloosenedandtheendoftheboltshallbe2-3threadsoutofthenut.Thepartsoftheactuatingsystemshallbecompleteandoperable.
3.3.6SealSurface
3.3.6.1Thesealsurfaceshallbecheckedforproperimprintofthecontactsurfacewiththedeveloper.
a.Forgatevalves,stopvalvesandcheckvalves,theimprintlinesshallbecontinuouswiththewidthbeingnotlessthan1mmandtheimprintbeinguniform.Theextremepositionoftheimprintlineofthegatevalvedisconthesealsurfaceshallbenolessthan3mmfromtheexcircle（includingthewidthoftheimprintline）.
b.Theimprintlineoftheballvalveshallbecontinuouswiththewidthbeingnotlessthanthatoftheouterdiameterofthesealringofvalvebodyandtheimprintbeinguniform.
3.3.6.2Thecumulativedecreaseinthicknessofthesealsurfaceofthesafetyvalveafterlappingshallbenotmorethan2mm.
3.3.6.3Thethicknessofthebuild-upweldinglayerofthesafetyvalve'ssealsurfaceshallnotbelessthan2mm.
3.3.6.4Theroughnessofthesealsurfaceafterlappingshallnotbelowerthan1.6andnotbelowerthan0.4forsafetyvalves.
3.3.7ValveBody,ValveBonnetandGaskets
3.3.7.1Theconnectionbetweenthevalveseatandvalvebodyshallbefirm,tightandfreeofleakage.
3.3.7.2Thevalvediskfitstheguideperfectlyandthereshallbenojammingandderailingatanyposition.
337.3Themax.out-and-infitclearaneeofthespacerflangeofthevalveshallmeettherequirementssetoutinTable1.
Table1
mm
SpacerFlangeDia.
42~85
90-125
130-180
185-250
255-315
320-400
405-500
Max.
Clearance
0.40
0.45
0.50
0.55
0.65
0.75
0.80
3.3.7.4Thesealsurfaceoftheflangeshallbecleanandfreeofscr
aps.
3.3.7.5Dyeinginspectionshallbemadeforthecontactsurfaceofthesteelgasketandsealboxandtheimprintlineshallbecontinuous.
3.3.7.6TheflangesshallbeparallelandtheinstallationdistanceshallbeincompliancewiththerequirementsofTable2.
Table2
mm
NominalDiameterDn
100
150~200
250
Min.InstallationClearance
2
2.5
3
3.3.7.7Forselectionofflanges,boltsandgaskets,refertoAppendixD（ForReference）.
3.3.7.8Theboltsforwhichspecialrequirementsfortighteningmomentsaresetshallbetightenedinaccordancewithsuchrequirementsandtheerrorinrespectofthetighteningmomentshallnotbebiggerthan5%.
3.3.7.9Themax.fitclearanceofthepackingglandandbottomsleevewiththeportsofthestuffingboxshallmeettherequirementssetoutinTable3.
Table3
mm
BoreofStuffingBox
22~26
28~34
36~44
48~70
75~106
122
Max.Clearanee
0.20
0.25
0.27
0.30
0.35
0.40
337.10Themax.fitclearaneebetweentheinsidediameterofthe
packingglandandthevalvestemshallbeincomplianeewiththerequirementssetoutinTable4.
Table4
mm
ValveStemDia.
14~16
18~22
24~28
32~50
55~80
>90
Max.Clearanee
1.00
1.20
1.40
1.50
1.80
2.20
3.3.7.11Thepackingglandshallbefreeofanydamagesanddeformation.
3.3.8ActuatingDevice
3.3.8.1Theconnectionbetweenthevalvestemandactuatingdeviceshallbereliableandshallnotbecomelooseofitself.
338.2Whentheendofthevalvestemisconnectedwiththevalvediskatthetimewhenthevalveisclosed,thediskshallalignedwiththevalvebody.
3.3.9ValveStem
3.3.9.1Thereshallbenopits,scrapsandaxialcleftsonthesurfaceofthevalvestemandtheroughnessofsuchsurfaceshallbe1.6.
3.3.9.2ThetoleraneevalueoflinearityalongthewholelengthofthevalvestemshallbeincomplianeewiththerequirementssetoutinTable5.
3.3.9.3ThetoleraneevalueofroundnessofthevalvestemshallbeincomplianeewiththerequirementssetoutinTable6.
Table5
mm
WholeLengthof
500
>500~1000
>1000
ValveStemL
Toleraneeof
Linearity
0.30
0.45
0.60
Table6
mm
ValveStemDia.
ToleraneeofRoundness
30
0.09
>30~5O
0.12
>50~60
0.15
>60
0.18
339.4Thetoleraneevalueofaxialityoftheaxesofthebuttressth
readandtheuppersealconewiththeaxisofthevalvestemshallbeincomplianeewiththerequirementssetoutinTable7.
Table7
mm
WholeLengthofValveStemL
500
>500~1000
>1000
ToleraneeofAxiality
0.15
0.30
0.45
3.3.9.5Theheadofthevalvestemshallbefreeofanyindentations
anddeformation.
3.3.9.6Thesphereattheendofthestemofthesafetyvalveshallberoundandsmooth.
3.3.9.7Thesurfaceofthesafetyvalvespringshallbefreeofcracksandthebearingplanesofboththeendsofthespringshallbeperpendiculartotheaxis.
3.3.10NutsofValveStem
3.3.10.1Themax.fitclearaneeoftheexcircleofthevalvestemandthesupportopeningshallmeettherequirementssetoutinTable8.
3.3.10.2Thehandwheelandbearingglandshallnotbeloosened.
Table8
mm
OutsideDiameter
3550
5580
>80
Max.FitClearanee
0.25
0.30
0.35
3.3.11PackingSeal
3311.1Thepackingformiterjointshallhaveanobliqueangleof30madeandthejointsofeverytwoneighboringturnsofthepackingshallbestaggeredby120andthepackingshallbecompressedfastturnbyturn.
3.3.11.2Afterthestuffingisinserted,thepackingglandshallbepressedintothestuffingboxbynolessthan2mm.Theexposedportionshallnotbelessthantwothirdsoftheheightofthepackingglandthatcanbepressedintothestuffingbox.
3.3.11.3Afterthepackingisfilled,thevalvestemshallrotate,goupanddownfreelywithoutseizureandleakage.
3.3.11.4Forselectionofappropriatepackingmaterials,refertoAppendixE（ForReferenee）.
3.3.12AssemblingofValve
3.3.12.2Theflangeandguidebushingofthesafetyvalvebodyshallbealignedforfitting.
3.3.12.3Theindicatingandlimitmechanismsshallbecorrectlylocated.
3.3.12.4Theinstallationoftheactuatingdeviceshallensureflexibilityandoperability
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