GB/T 50938-2013 GBT50938-2013石油化工鋼制低溫儲罐技術(shù)規(guī)范:英文

專用

人人文庫

NATIONALSTANDARD

OFTHEPEOPLESREPUBLICOFCHINA

TechnicalCodeforLowTemperatureSteelStorage

TanksinPetrochemicalEngineering

GB/T50938-2013

ChiefDevelopmentDepartment：ChinaPetroleumandChemicalCorporation

ApprovalDepartment：MinistryofHousingandUrbanRuralDevelopment

-

ofthePeoplesRepublicofChina

ImplementationDate：June1，2014專用

人人文庫

ChinaPlanningPress

Beijing2019

ChineseeditionfirstpublishedinthePeoplesRepublicofChinain2013

EnglisheditionfirstpublishedinthePeoplesRepublicofChinain2019

byChinaPlanningPress

rd

，，專用

3FloorCTowerGuohongBuilding

No.A11，Muxidi-Beili，XichengDistrict

Beijing，100038

PrintedinChinabyBeijingJingyintangGraphicPrintingCenter

?2013byMinistryofHousingandUrban-RuralDevelopmentof

thePeoplesRepublicofChina

Allrightsreserved.Nopartofthispublicationmaybereproducedortransmittedinanyformor

byanymeans人人文庫，graphic，electronic，ormechanical，includingphotocopying，recording，

oranyinformationstorageandretrievalsystems，withoutwrittenpermissionofthepublisher.

Thisbookissoldsubjecttotheconditionthatitshallnot，bywayoftradeorotherwise，belent，

resold，hiredoutorotherwisecirculatedwithoutthepublisherspriorconsentinanyformof

blindingorcoverotherthanthatinwhichthisispublishedandwithoutasimilarcondition

includingthisconditionbeingimposedonthesubsequentpurchaser.

ISBN978-7-5182-1090-9

AnnouncementofMinistryofHousingandUrban-Rural

DevelopmentofthePeoplesRepublicofChina

No.199

AnnouncementonPublishingtheTechnicalCodeforLowTemperatureSteel

StorageTanksinPetrochemicalEngineering

TechnicalCodeforLowTemperatureSteelStorageTanksinPetrochemicalEngineeringhas

beenapprovedasanationalstandardwithaserialnumberofGB/T50938-2013，anditisimplemented

onJune1，2014.

AuthorizedbytheResearchInstituteofStandardsandNorms，MinistryofHousingandUrban

-

RuralDevelopmentofP.RChina，thiscodeispublishedanddistributedby專用ChinaPlanningPress.

MinistryofHousingandUrbanRuralDevelopmentofthePeoplesRepublicofChina

-

November1，2013

人人文庫

Foreword

ThiscodeisdevelopedbyChinaPetroleumandChemicalCorporationandSinopecLuoyang

PetrochemicalEngineeringCorporationincooperationwithotherinvolvedorganizationsinaccordance

withtherequirementsofDocumentJIANBIAO〔2006〕No.136issuedbyoriginalMinistryof

Construction（MOC）ofthePeoplesRepublicofChinathePlanforDevelopingandRevisingNational

-

EngineeringConstructionStandards（2ndGroup）in2006.

Inpreparingthiscode，thedevelopmentteammadeextensiveinvestigationsandsummarizedthe

practicesonthelowtemperaturesteelstoragetanksinpetrochemicalengineering，madereferencesto

internationalstandardsandadvancedforeignstandards，solicitedthecommentsfromallinvolved

parties，andthenfinalizedthiscode.

Thiscodecomprises10chaptersand5appendixes，andmainlycoversGeneralProvisions，Terms，

BasicRequirements，Materials，DesignofMetallicComponents，DesignofConcreteStructures，

Insulation，F(xiàn)abrication，InspectionandAcceptanceofMetallicComponents，ConcreteConstructionand

Workmanship，andTests.

MinistryofHousingandUrbanRuralDevelopmentofthePeople專用sRepublicofChinaisincharge

-

ofadministrationofthiscode，ChinaPetroleumandChemicalCorporationisresponsibleforitsroutine

management.SinopecLuoyangPetrochemicalEngineeringCorporationistaskedforexplanationof

specifictechnicalcontents.Duringimplementationofthiscode，anycommentsandrecommendations

canbepostedorpassedontoSinopecLuoyangPetrochemicalEngineeringCorporation（Address：

No.27ZhongzhouXilu，LuoyangCity，HenanProvince，P.R，China，postcode：471003）toprovidegood

areferenceforfuturerevision.

Chiefdevelopmentorganization，codevelopmentorganization，participatingdevelopmentorgan

--

ization，chiefdrafterandchiefreviewersofthecode：

ChiefDevelopmentOrganization:

ChinaPetroleumandChemicalCorporation

SinopecLuoyangPetrochemicalEngineeringCorporation

Co-DevelopmentOrganization:

SinopecNanjingEngineeringandConstructionIncorporation

人人文庫SinopecEngineeringIncorporation

ParticipatingDevelopmentOrganization:

SinopecFourthConstructionCo.，Ltd

ChiefDrafter:

XuMaokunChenChonggangLiHongbinWeiXiaohuiWangSongsheng

ZhengXianglongCuiRuiminLaiJindongLengHuiLiFahaiSunHengzhi

LiLisongMiaoPingJuJingZhangXiangdong

ChiefReviewer:

WuTongzhuHuangZuojianDuanRuiZhouJiaxiangYangYifan

GeChunyuQiuZhenghuaZhaoYuchuanLiJianliuChenKuixian

·1·

WuYunlongWuXiaobinYangShengqiShenBingyuCuiJindong

HanYumeiLiLinjiangGouShiwenYangDongdaLiuBoShiHuijuan

WangZhaoweiLuoPingLingYiminWongDalongWangNingyang

WangShuipingChenJingpingYinShianYangXinhe

專用

人人文庫

·2·

Contents

1GeneralProvisions……………（1）

2Terms…………………………（2）

3BasicRequirements……………（4）

3.1TypesofStorageTanks…………（4）

3.2GeneralRequirements…………（6）

4Materials………………………（9）

4.1GeneralRequirements…………（9）

4.2MetallicTankBody……………（9）

4.3MaterialsofConcreteComponents………………（12）

5DesignofMetallicComponents………………（14）

5.1GeneralRequirements…………（14）

5.2PrimaryandSecondaryLiquidContainers…………（15）

5.3VapourContainers………………（18）

5.4SuspendedRoofs………………專用（21）

5.5Nozzles………………………（21）

5.6BottomConnectionsofPrimaryandSecondaryContainers…………（22）

5.7ConnectionsBetweenPrimaryandSecondaryContainers……………（23）

5.8OtherRequirements……………（23）

6DesignofConcreteStructures…………………（24）

6.1GeneralRequirements…………（24）

6.2LiquidTightness………………（24）

6.3ConcreteTanks…………………（25）

7Insulation………………………（27）

7.1Selection，PerformanceandTestingofInsulationMaterials…………（27）

7.2ProtectionofInsulation…………（28）

7.3DesignofInsulationSystem……………………（28）

7.4InsulationInstallation……………（31）

8Fabrication，Inspection人人文庫andAcceptanceofMetallicComponents……………（32）

8.1GeneralRequirements…………（32）

8.2MaterialManagement…………（32）

8.3Fabrication……………………（33）

8.4FieldInstallation………………（34）

8.5WeldingProcedures……………（36）

8.6Inspection……………………（38）

9ConcreteConstructionandWorkmanship……………………（43）

10Tests…………………………（45）

10.1HydrostaticTest………………（45）

·1·

10.2PneumaticTest………………（46）

AppendixAMainPhysicalPropertiesofGases…………………（48）

AppendixBDesignConditionsofTanks………（49）

AppendixCSeismicDesignRequirements……………………（50）

AppendixDReinforcementBarTesting………（51）

D.1Sampling………………………（51）

D.2Testing………………………（51）

AppendixECommonInsulationMaterialsandApplication……（52）

ExplanationofWordinginThisCode……………（54）

ListofReferenceCodes/Standards………………（55）

專用

人人文庫

·2·

1GeneralProvisions

Thiscodespecifiesthedesignandconstructionoflowtemperaturesteelstoragetanksfor

1.0.1

petrochemicalservices.

Thiscodeisapplicabletothedesignandconstructionofabovegroundverticalcylindricalsteel

1.0.2

singlecontainmenttanks，doublecontainmenttanksandfullcontainmenttanksusedtostorehydrocarbons

orammoniawithboilingpointbetween0℃and-165℃andatadesignpressurenohigherthan50kPa.

Thiscodeisnotapplicabletomembranetanksandprimarycontainersthatareonlyconstructedby

prestressingconcrete.

-

Thelowtemperaturesteelstoragetankforpetrochemicalserviceshallincludethefollowing

1.0.3

itemsinadditiontothetankbodyandtheintegralpartsconnectedtothetankbody：

Theconnectionsbetweenthetankandthepipeoutsidethetankwallshallinclude：

1

）Thefirstcircumferentialjointinweldingendpipeconnectionsthatdonothaveaflange

1-

locatednearthetank；

）Thefirstthreadedjointonthepipeoutsidethetankwallinthreadedpipeconnections；

2

）Thefaceofthefirstflangeinaboltedflangeconnection；專用

3

）Thefaceofthefirstflangeinaspecialconnectororpipefitting.

4

Thecoversandfastenersofthenozzleandmanhole.

2

Thecoldinsulationofthetankbottom，tankshell，tankroofandnozzles.

3

Thestructuralcomponentsinthetank.

4

Theanchoringstructureofthetank.

5

Inadditiontothiscode，thedesign，fabricationanderectionofthelowtemperaturesteelstorage

1.0.4

tanksshallalsocomplywiththecurrentapplicablenationalcodesandstandards.

人人文庫

·1·

2Terms

Operatingpressure

2.0.1

Assumedgaugepressurefortheoverheadvapourspaceunderoperatingconditions.

Designpressure

2.0.2

Assumedmaximumpositivepressure（gauge）fortheoverheadvapourspaceinthetank.

Designnegativepressure

2.0.3

Assumedmaximumnegativepressurefortheoverheadvapourspaceinthetank.

Testpressure

2.0.4

Airpressure（gauge）intheoverheadspaceofthetankduringtesting.

Setpressure

2.0.5

Pressureatwhichthepressurereliefdevicefirstopens.

Minimumdesigntemperature

2.0.6

Assumedtemperatureofthemedium，forwhichthetankisdesigned.

Designmetaltemperature

2.0.7

Minimumtemperatureforwhichthemetalliccomponentisdesigned專用.

Maximumdesignliquidlevel

2.0.8

Maximumpermissibleliquidlevelforatank.

Maximumnormaloperatinglevel

2.0.9

Maximumliquidlevelthatwillbemaintainedduringnormaloperation.

Singlecontainmenttank

2.0.10

Atankconsistingofonlyoneprimaryliquidcontainerwithinsulationoratankconsistingofa

primaryliquidcontainerandavapourcontainer.

Doublecontainmenttank

2.0.11

Atankconsistingofaprimaryliquidcontainerandasecondarycontainerthatiscapableof

containinganyleakageoftherefrigeratedliquidbutincapableofcontaininganyvapourresultingfrom

thisleakage.

Fullcontainmenttank

2.0.12

Atankwhichisdefinedasatankconsistingofaprimaryliquidcontainerandasecondarycontainer

capableofcontaining人人文庫bothanyleakageoftheliquidandanyvapourresultingfromthisleakage.

Primaryliquidcontainer

2.0.13

Partofasingle，doubleorfullcontainmenttankthatcontainsthelowtemperaturerefrigerated

liquidduringnormaloperation.

Secondaryliquidcontainer

2.0.14

Partoftheoutercontainerofadoubleorfullcontainmenttankthatcontainsthelowtemperature

refrigeratedliquid.

Innertank

2.0.15

Metallicselfsupportingcylindricalprimarycontainer.

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Outertank

2.0.16

·2·

Selfsupportingcylindricalsecondarycontainermadeofsteelorconcrete.

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Roof

2.0.17

Structureonthetopofashellorwallcontainingthevapourpressureandsealingoffthecontents

fromtheatmosphere.

Shell/wall

2.0.18

Metalorconcreteverticalcylinder.

Vapourcontainer

2.0.19

Partofasingle，doubleorfullcontainmenttankthatcontainsthevapourduringnormaloperation.

Supportingroofoftank

2.0.20

Atypeoftankroofforwhichitsloadissupportedbybeams，columns，trussesorotherstructures.

Selfsupportingroofoftank

2.0.21-

Atypeoftankroofforwhichitsloadsareonlysupportedbytankshell.

Rollover

2.0.22

Uncontrolledmassmovementofstoredliquid，correctinganunstablestateofstratifiedofdifferent

densitiesandresultinginasignificantevolutionofproductvapour.

Thermalprotectionsystem

2.0.23

Thermallyinsulatingandliquidtightstructureinordertoprotecttheoutertankagainstlow

temperature.

Vaporbarrier專用

2.0.24

Barriertoprevententryofwatervapourandairintotheinsulationorintotheoutertank.

Percentageofplasticelongation

2.0.25

Thepercentageofplasticelongationisthepermanentpercentileincreaseoftheoriginalgauge

lengthcorrespondingtotensilestrength.

人人文庫

·3·

3BasicRequirements

3.1TypesofStorageTanks

Alowtemperaturesteelstoragetankmaybeasinglecontainmenttank，adoublecontainment

3.1.1

tankorafullcontainmenttank.

Asinglecontainmenttankmaybeasinglecontainmenttankwithoutoutershell（Figure3.1.21）

3.1.2-

orasinglecontainmenttankwithoutershell（Figure3.1.22）.

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專用

Figure3.1.21Singlecontainmenttankwithoutoutershell

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1-Foundationheatingsystem；2-Foundation；3-Bottominsulation；4-Primarycontainer（steel）；

5-Flexibleinsulatingseal；6-Suspendedroof（insulated）；7-Roof（steel）；

8-Externalshellinsulation；9-Externalwatervapourbarrier；

10-Bundwall

Figure3.1.22Singlecontainmenttankwithoutershell

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1-Foundationheatingsystem；2-Foundation；3-Bottominsulation；

人人文庫4-Primarycontainer（steel）；5-Flexibleinsulatingseal；

6-Suspendedroof（insulated）；7-Roof（steel）；

8-Losefillinsulation；9-Outershell（steel）；

10-Bundwall

Adoublecontainmenttankmayconsistofaprimarycontainerandasecondarysteelcontainer

3.1.3

（Figure3.1.31）oraprimarycontainerandasecondaryconcretecontainer（Figure3.1.32）.Theannular

--

space，betweentheprimaryandsecondarycontainers，shouldnotbemorethan6.0m.

Afullcontainmenttankmayconsistofaprimarycontainerandasecondarysteelcontainer

3.1.4

（Figure3.1.41）oraprimarycontainerandasecondaryconcretecontainer（Figure3.1.42）.Theannular

--

space，betweentheprimaryandsecondarycontainers，shouldnotbemorethan2.0m.

·4·

Figure3.1.31Doublecontainmenttankwithsecondarysteelcontainer

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1-Foundationheatingsystem；2-Foundation；3-Bottominsulation；

4-Secondarycontainer（steel）；5-Primarycontainer（steel）；

6-Flexibleinsulatingseal；7-Suspendedroof（insulated）；

8-Roof（steel）；9-Cover（rainshield）；

10-Externalinsulation；11-Externalwatervapourbarrier

專用

Figure3.1.32Doublecontainmenttankwithsecondaryprestressedconcretecontainer

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1-Foundationheatingsystem；2-Foundation；3-Bottominsulation；

4-Secondarycontainer（concrete）；5-Primarycontainer（steel）；

6-Flexibleinsulatingseal；7-Suspendedroof（insulated）；

8-Roof（steel）；9-Cover（rainshield）；

10-Losefillinsulation；11-Outershell（steel）

人人文庫

Figure3.1.41Fullcontainmenttankwithsecondarysteelcontainer

-

1-Foundationheatingsystem；2-Foundation；3-Bottominsulation；

4-Secondarycontainer（steel）；5-Primarycontainer（steel）；

6-Flexibleinsulatingseal；7-Suspendedroof（insulated）；

8-Roof（steel）；9-Loosefillinsulation

·5·

Figure3.1.42Fullcontainmenttankwithsecondaryprestressedconcretecontainer

--

1-Foundationheatingsystem；2-Foundation；3-Bottominsulation；4-Primarycontainer（steel）；

5-Flexibleinsulatingseal；6-Suspendedroof（insulated）；7-Roof（concrete）；

8-Insulationoninsideofprestressedconcreteoutertank；

-

9-Secondarycontainer（concrete）

3.2GeneralRequirements

Themainphysicalpropertiesofgasesstoredinthelowtemperaturesteelstoragetanksfor

3.2.1

petrochemicalservicesshallbeinaccordancewithAppendixAofthiscode，andthedesignconditions

forlowtemperaturesteelstoragetanksforpetrochemicalservicesshallincludetheinformationindicated

inAnnexBofthiscode.專用

Thelowtemperaturesteelstoragetankshallbedesignedtosatisfythefollowingbasic

3.2.2

requirements：

Theliquidandthevapourcanbestoredundernormaloperatingconditions.

1

Itcanbefilledandemptiedatthespecifiedflowrates.

2

Boiloffiscontrolledandinexceptionalcasescanberelievedtoflareorvent.

3-

Pressureoperatingrangespecifiedcanbemaintained.

4

Ingressofairandmoistureisprevented，exceptinexceptionalcaseswhenthevacuumrelief

5

valveshavetobeopened.

Boiloffisasspecifiedandcondensation/frostontheexternalsurfaceisminimized.

6-

Damageduetospecifiedaccidentalactionsislimitedandwillnotresultinlossofliquid.

7

Lowtemperaturesteelstoragetanksforpetrochemicalservicesshouldnotbeconstructedinthe

3.2.3

areaswithseismicprecautionaryintensityhigherthan9degreesorwithdesignbasicaccelerationof

groundmotiongreaterthan0.40g.

Seismicdesignshallbemadeforthelowtemperaturesteelstoragetanksforpetrochemical

3.2.4人人文庫

servicesthatareconstructedintheareaswithseismicprecautionaryintensityequaltoorhigherthan6

degreesorwithdesignbasicaccelerationofgroundmotionnolessthan0.05g.Seismicdesignoflow

temperaturesteelstoragetanksforpetrochemicalserviceshallcomplywiththerequirementsspecified

inAppendixCofthiscode.

Vapourbarriermaybeprovidedfortheouterprestressedconcretetank.Theliquidtightnessof

3.2.5-

theprestressedconcretestructure，withoutaliquidtightliner，shallbeensuredbytheminimum

-

compressionzoneintheconcretestructure.

Allinletsandoutletsshould，preferably，bemadeattheroofofthetank.Incaseswherebottom

3.2.6

inletsandoutletsareused，theexternalpipesshouldbeweldedtothebottomconnection.

·6·

Fixedconnectionsshould，preferably，notbelocatedwithinannularspacesbetweentheprimary

3.2.7

andsecondarycontainers.Andiffixedconnectionsarerequired，theyshallcomplywiththespecifications

inArticle5.7ofthiscode.

Theprimarycontainershallprovideaminimumfreeboardabovethemaximumliquidlevelequal

3.2.8

to300mm.

Markersformonitoringtanksettlementshallbedesignedforthelowtemperaturesteelstorage

3.2.9

tanksforpetrochemicalservices.

Tanksettlementshouldcomplywiththefollowingrequirements：

Forsteelstoragetanks，theirdifferentialsettlement（theplaneinclination，inmm）atdiameter

1

directionshallnotexceed125timestheratiooftankdiametertoheight；thedifferentialsettlementatthe

perimetershallnotexceed10mmeach10mofcircumference，andthedifferentialsettlement（inmm）

betweenthetankcenterandtheperimetershallnotexceed1/240ofthetankradius.

Forconcretestoragetanks，theirplaneinclinationshallnotexceed1/500，andthedifferential

2

settlementbetweenthetankcenterandtheperimetershallnotexceed1/300ofthetankradius.

Provisionsagainstfrostheaveinfoundationshallbedesignedforthelowtemperaturesteel

3.2.10

storagetankforpetrochemicalservice.Thefoundationheatingsystem，ifrequired，shallbedesignedso

thatthetemperatureofthefoundationshallnotdropbelow0℃atanyplace.

Thermalprotectionsystemshallbeprovidedfortheprestressedconcretesecondarycontainer.

3.2.11-

Thethermalprotectionsystemshallcoverthewholebottomandthelower專用partofthewall，andshall

consistofsteelplates（doublebottom）andinsulationmaterial.

Theheightoftheverticalpartofthethermalprotectionsystemshallbedeterminedbasedon

3.2.12

temperaturedistributionandthedeformationoftherigidcorner.

Protectionagainsttheimpactoflightningshallbeprovidedforthelowtemperaturesteel

3.2.13

storagetanksforpetrochemicalservices，andshallbeinaccordancewiththecurrentnationalstandard

CodefordesignprotectionofstructureagainstlightningGB50057，andCodefordesignprotectionof

petrochemicalplantagainstlightningGB50650.

Firefightingfacilitiesforlowtemperaturesteelstoragetanksforpetrochemicalservicesshallbe

3.2.14

inaccordancewiththecurrentnationalstandardFirepreventioncodeofpetrochemicalenterprisedesign

GB50160andanyotherapplicablecurrentnationalstandards.

Thedesignloadsoflowtemperaturesteelstoragetankforpetrochemicalserviceshallinclude：

3.2.15

Selfweights.

1-

Hydrostaticloadofthemedium.

2

Prestress.

3-人人文庫

Imposedloadsshallinclude：

4

）Uniformlydistributedloadof1.2kN/m2overtheprojectedfixedroofarea.Ifsnowloadexceeds

1

0.6kN/m2，theexcessloadshallbeincluded；

）Uniformlydistributedloadof2.4kN/m2actingontheplatformsandwalkways；

2

）Concentratedloadof5kNoveranareaof300mm×300mmplacedatanylocationonplatforms

3

orwalkways.

Windloads.

5

Seismicactions.

6

Snowloads.

7

·7·

Thepressureexertedbythecoldinsulationsystem（includingperlitepowder）.

8

Designpressure.

9

Designnegativepressure.

10

Testloads.

11

Thermaleffects.

12

Thecorrosionallowanceofthecomponentsoflowtemperaturesteelstoragetanksfor

3.2.16

petrochemicalservicesshallbedeterminedbasedoncorrosivecharacteristicsofthestoredmediumand

environment.