GB/T 50938-2013 GBT50938-2013石油化工钢制低温储罐技术规范:英文

专用

人人文库

NATIONALSTANDARD

OFTHEPEOPLESREPUBLICOFCHINA

TechnicalCodeforLowTemperatureSteelStorage

TanksinPetrochemicalEngineering

GB/T50938-2013

ChiefDevelopmentDepartment：ChinaPetroleumandChemicalCorporation

ApprovalDepartment：MinistryofHousingandUrbanRuralDevelopment

-

ofthePeoplesRepublicofChina

ImplementationDate：June1，2014专用

人人文库

ChinaPlanningPress

Beijing2019

ChineseeditionfirstpublishedinthePeoplesRepublicofChinain2013

EnglisheditionfirstpublishedinthePeoplesRepublicofChinain2019

byChinaPlanningPress

rd

，，专用

3FloorCTowerGuohongBuilding

No.A11，Muxidi-Beili，XichengDistrict

Beijing，100038

PrintedinChinabyBeijingJingyintangGraphicPrintingCenter

©2013byMinistryofHousingandUrban-RuralDevelopmentof

thePeoplesRepublicofChina

Allrightsreserved.Nopartofthispublicationmaybereproducedortransmittedinanyformor

byanymeans人人文库，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专用ChinaPlanningPress.

MinistryofHousingandUrbanRuralDevelopmentofthePeoplesRepublicofChina

-

November1，2013

人人文库

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，Fabrication，InspectionandAcceptanceofMetallicComponents，ConcreteConstructionand

Workmanship，andTests.

MinistryofHousingandUrbanRuralDevelopmentofthePeople专用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

人人文库SinopecEngineeringIncorporation

ParticipatingDevelopmentOrganization:

SinopecFourthConstructionCo.，Ltd

ChiefDrafter:

XuMaokunChenChonggangLiHongbinWeiXiaohuiWangSongsheng

ZhengXianglongCuiRuiminLaiJindongLengHuiLiFahaiSunHengzhi

LiLisongMiaoPingJuJingZhangXiangdong

ChiefReviewer:

WuTongzhuHuangZuojianDuanRuiZhouJiaxiangYangYifan

GeChunyuQiuZhenghuaZhaoYuchuanLiJianliuChenKuixian

·1·

WuYunlongWuXiaobinYangShengqiShenBingyuCuiJindong

HanYumeiLiLinjiangGouShiwenYangDongdaLiuBoShiHuijuan

WangZhaoweiLuoPingLingYiminWongDalongWangNingyang

WangShuipingChenJingpingYinShianYangXinhe

专用

人人文库

·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………………专用（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人人文库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）

专用

人人文库

·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；专用

3

）Thefaceofthefirstflangeinaspecialconnectororpipefitting.

4

Thecoversandfastenersofthenozzleandmanhole.

2

Thecoldinsulationofthetankbottom，tankshell，tankroofandnozzles.

3

Thestructuralcomponentsinthetank.

4

Theanchoringstructureofthetank.

5

Inadditiontothiscode，thedesign，fabricationanderectionofthelowtemperaturesteelstorage

1.0.4

tanksshallalsocomplywiththecurrentapplicablenationalcodesandstandards.

人人文库

·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专用.

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人人文库bothanyleakageoftheliquidandanyvapourresultingfromthisleakage.

Primaryliquidcontainer

2.0.13

Partofasingle，doubleorfullcontainmenttankthatcontainsthelowtemperaturerefrigerated

liquidduringnormaloperation.

Secondaryliquidcontainer

2.0.14

Partoftheoutercontainerofadoubleorfullcontainmenttankthatcontainsthelowtemperature

refrigeratedliquid.

Innertank

2.0.15

Metallicselfsupportingcylindricalprimarycontainer.

-

Outertank

2.0.16

·2·

Selfsupportingcylindricalsecondarycontainermadeofsteelorconcrete.

-

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专用

2.0.24

Barriertoprevententryofwatervapourandairintotheinsulationorintotheoutertank.

Percentageofplasticelongation

2.0.25

Thepercentageofplasticelongationisthepermanentpercentileincreaseoftheoriginalgauge

lengthcorrespondingtotensilestrength.

人人文库

·3·

3BasicRequirements

3.1TypesofStorageTanks

Alowtemperaturesteelstoragetankmaybeasinglecontainmenttank，adoublecontainment

3.1.1

tankorafullcontainmenttank.

Asinglecontainmenttankmaybeasinglecontainmenttankwithoutoutershell（Figure3.1.21）

3.1.2-

orasinglecontainmenttankwithoutershell（Figure3.1.22）.

-

专用

Figure3.1.21Singlecontainmenttankwithoutoutershell

-

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

-

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

人人文库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

-

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

专用

Figure3.1.32Doublecontainmenttankwithsecondaryprestressedconcretecontainer

--

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）

人人文库

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.专用

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人人文库

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专用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-人人文库

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.

专用

人人文库

·8·

4Materials

4.1GeneralRequirements

Steelsusedforlowtemperaturesteelstoragetanksforpetrochemicalserviceshallbeprovided

4.1.1

withqualitycertificatessuppliedbythesteelmanufacturers.

Thematerialsusedtoconstructlowtemperaturesteelstoragetanksshallbeproperlyselected

4.1.2

basedonthetankoperatingconditions，thematerialperformancesandeconomicconsideration.

Thematerialsusedtoconstructconcretecomponentsinlowtemperatureenvironmentshallhave

4.1.3

lowtemperatureresistantperformance.

Thesteeloftheprimarycontainerandsecondarysteelcontainershallbethekilledsteel

4.1.4

producedbyoxygenconverterorelectricfurnace.Ifthedesignmetaltemperatureislowerthan-20℃，

secondaryrefiningshallbealsousedforthelowtemperaturesteelplates，thelowtemperaturesteel

forgingsandlowtemperaturesteelpipes.

Thedesignmetaltemperatureforeachcomponentshallbecalculatedbasedonthemost

4.1.5

pessimisticassumption.

Anyspecialrequirementsforsteels，ifany，shallbespecifiedinthe专用designdocuments.

4.1.6

4.2MetallicTankBody

ⅠPrimaryandSecondaryLiquidContainer

Thedeliverystatesofsteelplatesusedforlowtemperaturesteelstoragetanksforpetrochemical

4.2.1

servicesshallbeinaccordancewithTable4.2.1.

Table4.2.1Deliverystatesofsteelplatesusedforlowtemperaturesteelstoragetanks

Applicablecode/Min.designDeliverythickness

S/NSteelgradeDeliverystate

standardtemperature（℃）（mm）

-20≤12

-10≤16

Hotrolled，controlledrolled，

1Q245RGB713

normalized0≤34

-20≤20

-10≤25

Hotrolled，controlledrolled，

2Q345R人人文库GB713

normalized0≤34

3Q370RGB713Normalized-20≤34

Normalized，normalizedand

416MnDRGB3531-40≤34

tempered

Normalized，normalizedand

515MnNiDRGB3531-45≤34

tempered

Normalized，normalizedand

609MnNiDRGB3531-70≤34

tempered

·9·

Table4.2.1（continued）

Applicablecode/Min.designDeliverythickness

S/NSteelgradeDeliverystate

standardtemperature（℃）（mm）

79Ni490GB24510Doublenormalizedandtempered-196≤30

Quenchedandtemperedordouble

89Ni590AGB24510-196≤30

quenchedandtempered

Quenchedandtemperedordouble

99Ni590BGB24510-196≤30

quenchedandtempered

10S30408GB24511Solutionheattreated-196≤34

Notes：1Thecompressionratioshallnotbelessthan3forthesteelplatesmadebycontinuouscastingdirectrollingprocess.

-

2SeetheListofReferenceCodes/Standardsforthestandardnamesofthesteelplatesshowninthetableabove.

For9Ni590Aand9Ni590Bsteelplates，tensiletestandCharpyVnotchimpacttestshallbe

4.2.2-

carriedoutperheattreatmentofthematerial.Tensiletestandimpacttestshallbecarriedoutforeach

completedplatefromwhichliquidcontainingtankplatesarecut.

WhereQ245RandQ345Rsteelplatesofthicknessgreaterthan25mmareusedtoconstructthe

4.2.3

shellandbottomoftheprimarycontainerorthesecondarycontainer，theyshallbeinnormalized

condition.专用

Wherethefollowingsteelplatesareusedtoconstructtheshellandbottomoftheprimary

4.2.4

containerandthesecondarycontainer，eachpieceofsteelplateshallbeultrasonicallyexamined，andthe

examinationmethodandqualitygradeshallbeinaccordancewiththecurrentapplicablenational

standardNondestructivetestingofpressureequipmentpart3：ultrasonictestingJB/T4730.3：

-

ForQ245RandQ345Rsteelplatesofthicknessgreaterthan30mm，theiracceptancequality

1

criterionshallnotbelowerthanLevelⅡ；

For16MnDR，15MnNiDRand09MnNiDRsteelplatesofthicknessgreaterthan20mm，their

2

acceptancequalitycriterionshallnotbelowerthanLevelⅡ；

ForQ370Rsteelplateofthicknessgreaterthan25mm，itsacceptancequalitycriterionshallnot

3

belowerthanLevelⅡ；

Forthesteelplatessuppliedinquenchedandtemperedstateandofthicknessgreaterthan

4

16mm，theiracceptancequalitycriterionshallnotbelowerthanLevelⅠ.

Ifnocorrespondingstandardsareavailableforthesteelstructuresusedtoconstructthelow

4.2.5

temperaturesteelstorage人人文库tanksinpetrochemicalservices，thesteelplateshavingthesameperformance

maybeusedforsubstitutionafterprefabrication.

Wherealuminumisusedtoconstructthesuspendedroof，theselectedaluminumplatesand

4.2.6

aluminumprofilesshallbeinaccordancewiththecurrentapplicablenationalstandardWrought

aluminumandaluminumalloyplates，sheetsandstripsforgeneralengineeringGB/T3880.1～

GB/T3880.3andWroughtaluminumandaluminumalloyextrudedprofilesforgeneralengineering

GB/T6892.

Thedeliverystatesofsteelpipesusedforlowtemperaturesteelstoragetanksshallbein

4.2.7

accordancewithspecificationsinTable4.2.7.

·10·

Table4.2.7Deliverystatesofsteelpipesusedforlowtemperaturesteelstoragetanks

Applicablecode/Min.designNorminalthickness

S/NDesignationDeliverystate

standardtemperature（℃）（mm）

110GB9948Normalized-20≤30

220GB9948Normalized0≤30

316MnDGGB/T18984Normalized-45≤20

410MnDGGB/T18984Normalized-45≤20

509Mn2VDGGB/T18984Normalized-70≤20

606Ni3MoDGGB/T18984Normalized-100≤20

70Crl8Ni9GB/T14976Solutionheattreated-196≤28

80Cr19NilOGB/T14976Solutionheattreated-196≤28

90Cr18Nil0TiGB/T14976Solutionheattreated-196≤28

1006Cr19NilOGB/T12771Solutionheattreated-196≤28

11022Cr19NilOGB/T12771Solutionheattreated-196≤28

1206Cr18NillTiGB/T12771Solutionheattreated-196≤28

Note：SeetheListofReferenceCodes/Standardsforthestandardnamesofthesteelpipesshowninthetableabove.

Thematerialsofforgingsusedfortanknozzlesshallcomplywiththecurrentnationalstandard

4.2.8

LowalloysteelforgingsforlowtemperaturepressureequipmentsNB/T47009andStainlessandheat

-专用-

resistingsteelforgingsforpressureequipmentsNB/T47010.

Thematerialsofbolts，studsandnutsusedfortanknozzleflangesshallcomplywiththecurrent

4.2.9

nationalstandardPressurevesselspart2：MaterialsGB150.2.

-

ⅡVapoturContainer

Thedeliverystatesofsteelplatesusedforvapourcontainershallbeinaccordancewiththe

4.2.10

specificationsinTable4.2.10.

Table4.2.10Deliverystatesofsteelplatesusedforvapourcontainer

Applicablecode/Min.designNominalthickness

S/NDesignationDeliverystate

standardtemperature（℃）（mm）

-20≤12

1Q235BGB/T3274Hotrolled

0≤24

-20≤16

2Q235CGB/T3274Hotrolled

0≤30

Hotrolled，controlledrolled，

3Q245RGB713-20≤34

人人文库normalized

Hotrolled，controlledrolled，-20≤12

4Q345BGB/T1591

normalized0≤20

Hotrolled，controlledrolled，-20≤12

5Q345CGB/T1591

normalized0≤24

Hotrolled，controlledrolled，

6Q345RGB713-20≤34

normalized

Normalized，normalizedand

716MnDRGB3531-40≤34

tempered

Note：SeetheListofReferenceCodes/Standardsforthestandardnamesofthesteelplatesshowninthetableabove.

·11·

ⅢWeldingConsumables

Weldingconsumablesshallbedeterminedbasedonthechemicalcompositions，mechanical

4.2.11

performancesandweldingperformancesoftheparentmetalsaswellastheconstructioncharacteristics，

serviceconditionsandweldingproceduresofthestoragetanks，andtheyshallbedeterminedbytestingif

necessary.

Weldingconsumablesshallbeprovidedwithqualitycertificates.

4.2.12

Weldingmaterialsusedtoweldcarbonsteelandlowalloysteelofdifferentstrengthclasses

4.2.13

shallensuretheanticrackingperformanceandmechanicalperformanceoftheweldedjoints，andthe

-

tensilestrengthshallnotbehigherthantheupperlimitoftheparentmetalinhigherstrengthandshall

notbelowerthanthelowerlimitoftheparentmetalinlowerstrength.

Weldingconsumablesusedforjointsbetweenhighalloysteelandcarbonsteelorlowalloy

4.2.14

steelshallensurethecrackresistantperformanceandmechanicalperformanceoftheweldjoints，andthe

weldingconsumableswithNiCrcontenthigherthanthatofthehighalloysteelshouldbeused.

-

Weldingmaterialsusedforprimaryliquidcontainershallberetested.

4.2.15-

4.3MaterialsofConcreteComponents

ⅠConcrete

TheconcretestrengthclassesshouldnotbelowerthanthespecificationsintheTable4.3.1

4.3.1

below.专用

Table4.3.1Concretestrengthclasses

StructuralcomponentConcretestrength

PilesC30

Pilecap，tankbottomplateC30

RingbeamunderinnertankC30

PrestressedwallC50

-

TankroofC30

ConcretescreedC20

Enhancedstrength，thatisknowntoexistforconcreteasamaterialofconstructionatlow

4.3.2

temperature，isnormallynotusedindeterminingtheultimatestrengthofconcretesections.However，

whenadequatetestingdataisavailable，thelowtemperaturepropertiesmaybeutilized.

Admixturesofcertainratiomaybeconsideredappropriateforconcrete.

4.3.3

Whereairentrainingagentsareused，theymayberesinbasedtoensuretheconcretemixmay

4.3.4人人文库

containupto5%entrainedair；however，themetalbasedagentsshouldnotbeused.

-

ConcretematerialshouldbePortlandcementwithlowheatofhydration，groundgranulatedblast

4.3.5

furnaceslagorpulverizedfuelashmaybeusedincombinationwithPortlandcement.However，the

designershallbeawarethattheremaybeaslowerstrengthgain.

Thelowtemperatureconcretemixingproportionshallbedeterminedbylaboratorytesting.

4.3.6

Forcorrosiveenvironment，theconcreteshallalsobeinaccordancewiththecurrentnational

4.3.7

standardStandardforcorrosionprotectiondesignforindustrialconstructionsGB50046.

ⅡSteels

TypicalyieldstrengthofreinforcingsteelforconcretetankmaybeselectedfromTable4.3.8.

4.3.8

·12·

Table4.3.8Typicalyieldstrengthofreinforcingsteelforconcretetank

StructuralMemberTypicalyieldstrength（N/mm2）

Piles335，400

Pilecap，tankbottomplate335，500

Ringbeamunderinnertank400，500

Prestressedwall（includingbuttress）335，400，500

-

Tankroof335，500

2.0×105N/mm2maybetakenasthemodulusofelasticityofreinforcingsteel.

4.3.9

Thereinforcingsteelshallcomplywiththefollowingrequirements：

4.3.10

Whentheservicetemperatureisnotbelow-20℃，thereinforcingsteelshallbeinaccordance

1

thecurrentnationalstandardStandardofconcretestructuredesignGB50010.

Whentheservicetemperaturefallsbelow-20℃，theconnectorsshallbesubjecttotensiletests

2

atlowtemperature，andtheresultdifferenceofthesetestsshallbewithin5%ofthosespecifiedat

ambienttemperature.

InadditiontotherequirementsspecifiedinTable4.3.8ofthiscode，thelowtemperature

4.3.11

resistantsteelintheinteriorwalloftheprestressedwallshallalsocomplywiththeductility

-

requirementsatlowtemperaturesspecifiedinAttachmentDofthiscode.Ifthelowtemperaturesteel

failstosatisfytheductilityrequirementsspecifiedinAttachment专用Dofthiscode，thefollowing

alternativesmaybeconsidered：

Carbonmanganesesteel，9%nickelsteelorausteniticstainlesssteel.

1-

Reducingallowabletensilestressofreinforcingorprestressingsteel.

2-

Prestressingsteelshallcomplywiththefollowingrequirements：

4.3.12-

Prestressingsteelshouldbelowrelaxationsteelstandsandshallhaveproperductility，andits

1--

physicalandmechanicalpropertiesshallcomplywiththecurrentnationalstandardSteelstrandforpre

-

stressedconcreteGB/T5224，thetypicalultimatestrengthshouldbe1860N/mm2，jackingstressshould

notexceed80%oftypicalultimatestrengthoftheprestressingsteel，andthestressrelaxationafter

-

jackingfor1000hshallnotbehigherthan2.5%.

Themodulusofelasticityofprestressingsteelmaybetakenas1.95×105N/mm2.

2-

Prestressingsteelshallbelesssensitivetostresscorrosion.

3-

Prestressingsteelshouldnotbewelded，andonlytheweldjointsbeforeprestressingare

4--

allowedforthesinglestrandedwiresinthesteelstrands.

Anchorage，gripsandcouplersforprestressingsteelshallsatisfythestrength，elongationand

4.3.13-

fatigueresistantdesign人人文库requirements，andtheirspecificationsshallconformtothecurrentnational

-

standardAnchorage，gripandcouplerforprestressingtendonsGB/T14370.Theanchorageshallhave

-

sufficientstrengthtopermitthestressofprestressingsteeltobetransmittedtotheconcreteandshall

-

properlyworkincaseofcrackingintheanchoragezone，andtheanchorageshallnotbelocatedinhigh

stresszone.

Whenthedesigntemperatureislowerthan-20℃，specialtestingshallbecarriedoutforthe

4.3.14

prestressingsteelandanchorage.

-

Steelwiresmayalsobeusedastheprestressingsteel；however，theyshallcomplywiththe

4.3.15-

currentnationalstandardSteelwiresfortheprestressedofconcreteGB/T5223.

-

·13·

5DesignofMetallicComponents

5.1GeneralRequirements

Thelowtemperaturesteelstoragetanksforpetrochemicalservicesshallbedesignedbasedon

5.1.1

variouscombinationsofloads.

Themaximumallowabletensilestressofanyplateorweldmetalshallbeinaccordancewith

5.1.2

Table5.1.2.

Table5.1.2Maximumallowabletensilestressofanyplateorweldmetal

Allowablestressduring

TypeofsteelAllowablestressinservice

hydrostatictest

Q235BQ235CQ245RQ345BQ345CQ345R0.43，0.67，260MPa

、、、、、、RmRel，

Q370R16MnDR15MnNiDR09MnNiDRThelesserof0.43or0.67or260MPa0.60R，0.85R，340MPa

、、、：RmRelmel，

Thelesserof0.60Ror

：m

9Ni4909Ni590A9Ni590B0.43，0.67Thelesserof0.43or0.67

、、RmRel，：RmRel0.85Ror340MPa

el

S304080.40，0.67Thelesserof0.40or0.67

RmRel，：RmRel

Notes1RisspecifiedtensilestrengthlowerlimitinMPaandRisspecifiedyieldstrength专用lowerlimitinMPa.

：m，，el，

2For9%Nisteel，Rmaybe0.2%ofproofstress（nonproportional）inMPa.

el-

3Forausteniticsteel，Rmaybe1.0%ofproofstress（nonproportional）inMPa.

el-

Forseismicdesign，theallowablestressmaybetakenasfollowing：

5.1.3

Theallowablestressforprecautionaryearthquakemaybe1.33timestheallowablestressunder

1

operatingconditions.

Forseldomoccurredearthquake，theallowablestressintensionmaybe1.00R，andthecritical

2el

yieldstressmaybetakenforallowablecompressionstress.

Theallowabletensilestressinthetankanchorageshallcomplywiththefollowingrequirements：

5.1.4

Normaloperation：0.50R.

1el

Test：0.85R.

2el

Precautionaryearthquake：0.67R.

3el

Seldomoccurredearthquake：1.00R.

4el

Shellattachmentsandembedmentsshallbedesignedforaloadcorrespondingtothefullyield

5.1.5

capacityoftheuncorroded人人文库anchorboltsoranchorstraps.

ForLNGservice，anchorsmadefrom9%Nisteelorausteniticsteelshallapplytheanchor

5.1.6

materialyieldstressattheboilingpointtemperaturespecifiedinthecurrentnationalstandardGeneral

characteristicsofliquefiednaturalgasGB/T19204orcolder.

Theallowablecompressivestressofthecompressionareaatrooftoshelljunctionshallnotbe

5.1.7--

greaterthan120MPa.

Forbuttwelds，wheretheloadisperpendiculartotheweldandintheplaneoftheplates，the

5.1.8

allowablestressshallbelimitedtothevaluegiveninTable5.1.2，andwheretheloadisparalleltothe

weld，theallowableshearstressshallbelimitedto75%ofthevaluegiveninTable5.1.2.

Forfilletwelds，wheretheloadisperpendiculartotheweld，theallowableshearstressshallbe

5.1.9

·14·

limitedto70%ofthevaluegiveninTable5.1.2，andwheretheloadisparalleltotheweld，the

allowableshearstressshallbelimitedto50%ofthevaluegiveninTable5.1.2.

5.2PrimaryandSecondaryLiquidContainers

ⅠBottom

Theannularplatesoftankbottomshallhaveaminimumthickness（excludingcorrosion

5.2.1

allowancebutnotlessthan8mm

），ta，：

（5.2.1）

where——theminimumthicknessofannularplateinmm

：ta，；

——thethicknessofthebottomshellcourseinmm.

t1，

Thejointoftankbottomandthebottomshellcourseshallcomplywiththefollowing

5.2.2

requirements：

Theminimumwidthl，betweentheedgeofthesketchplateandtheinnersideoftheshell［see

1a

Figure5.2.2（c）］shallbethevaluecalculatedbythefollowingequationor600mm，whicheveristhe

larger：

240

＞5.2.2

lata（）

H专用

人人文库

Figure5.2.2Typicalbottomlayout

1-Shell；2-Annularplate；3-Sketchplate；4-Backingstrip

15··

Where——thethicknessoftheannularplateinmm

：ta，；

H——themaximumdesignliquidheight，inm.

Theradialjointsbetweenannularplatesshallbebuttwelded.

2

Shelltoannularplateattachmentshallbeeitheror：

3

）Buttwelded；

1

）Forthefilletweldedatbothsides，themaximumheightoflegfilletsis12mm.Minimumleg

2

sizeisthesmalleroftheshellortheannularplatethickness；

）Grooveweldplusfilletforannularplategreaterthan12mminthickness.Thegroovedepth

3

plusfilletlegshallequaltotheannularplatethickness.

Annularplateradialjointsshallnotbelocatedlessthan300mmfromanyverticalshelljoint.

4

Minimumdistancefromoutsideoftheshellplatetotheouteredgeoftheannularplateshallbe

5

50mm.

Layoutsanddetailsfortankbottomandannularplatingshallcomplywiththerequirem