GB 50016-2014 建筑設(shè)計防火規(guī)范（2018年版）英文

NATIONALSTANDARD

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OFTHEPEOPLESREPUBLICOFCHINA

CODEFORFIREPROTECTIONDESIGNOFBUILDINGS

（2018Edition）

GB50016-2014

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ISBN978-7-5182-1364-1中華人民共和國住房和城鄉(xiāng)建設(shè)部公告

2021年第164號

住房和城鄉(xiāng)建設(shè)部關(guān)于發(fā)布《石油化工

鋼制設(shè)備抗震設(shè)計標準》等4項

工程建設(shè)標準英文版的公告

現(xiàn)批準《石油化工鋼制設(shè)備抗震設(shè)計標準》（CB/T50761-2018）、《石油化工鋼制設(shè)備抗

震鑒定標準》（GB/T51273-2018）、《石油化工工程數(shù)字化交付標準》（GB/T51296-2018）、

《建筑設(shè)計防火規(guī)范（2018年版）》（GB50016-2014）等4項工程建設(shè)標準英文版。工程建設(shè)

標準英文版與中文版出現(xiàn)異議時，以中文版為準。

該4項工程建設(shè)標準英文版由住房和城鄉(xiāng)建設(shè)部組織中國計劃出版社有限公司出版

發(fā)行。

中華人民共和國住房和城鄉(xiāng)建設(shè)部

2021年9月18日

AnnouncementoftheMinistryofHousingandUrban-Rural

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DevelopmentofthePeoplesRepublicofChina

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CodeforFireProtectionDesignofBuildings

-CodeforFireProtectionDesignof

Buildings，

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StandardizationofEngineeringConstruction.

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Explanationofthepartialrevisionofthecode

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ChiefDevelopmentOrganization：

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ChiefDrafters：

·1·ChiefReviewers：

ZHOUChangWANGDongLIShucongJIANGGangZHUXianze

CHEXueyaDIWeiLIUWenliXUHongqingZHUANGSunyi

ZHAOLiangling

Translators：

NIZhaopengQIUPeifangWANGZongcunPENGLei

Reviewers：

LIUJiyangHURuiLIANDanjunLOUGuobiaoZHUGuoqing

LUWeidongZHANGHaiyanYANGXuebingWANGZhao

·2·AnnouncementoftheMinistryofHousingandUrban-Rural

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DevelopmentofthePeoplesRepublicofChina

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CodeforFireProtectionDesignofBuildings

CodeforFireProtectionDesignofBuildings

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-CodeofDesignonBuilding

FireProtectionandPrevention-CodeforFireProtectionDesignofTallBuilding

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CodeofDesignonBuildingFireProtectionandPreventionCodeforFireProtectionDesign

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·1·CodeofDesignonBuildingFireProtectionandPreventionCodeforFireProtection

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·2·1Generalprovisions

1.0.1Thiscodeisformulatedwithaviewtopreventingfireaccidentsinbuildings，reducingfire

hazardsandprotectingsafetyoflifeandproperty.

1.0.2Thiscodeisapplicabletothefollowingnewlyconstructed，enlargedandalteredbuildings：

1Factorybuildings；

2Storages；

3Civilbuildings；

4ClassA，B，Cliquidtanks（tankfarms）；

5Combustibleandcombustion-supportinggastanks（tankfarms）；

6Stackyardsforcombustibles；

7Urbanroadtunnels.

Ifdedicatednationalstandardsareavailable，thefireprotectiondesignofbuildingsforcivilair

defenseengineering，petroleumandnaturalgasengineering，petrochemicalengineering，fossilfuel

powerplantsandsubstationsshouldcomplywiththerequirementsofthosestandards.

1.0.3Thiscodeisnotapplicabletothefireprotectiondesignofbuildingssuchasfactorybuildings

（storages）forgunpowder，explosivesandtheirproductsaswellasfireworksandfirecrackers.

1.0.4Whereabuildingismulti-used，fireseparationsshallbeprovidedbetweendifferentuses.Fire

protectiondesignofbuildingsandtheareasofdifferentusesshallbedeterminedaccordingtothe

relevantrequirementsofthiscode.

1.0.5Fireprotectiondesignofbuildingsshallcomplywiththerelevantnationalmajorpolicies，and

guarantee，onthewhole，theoverallplanning，safetyandapplicability，advancedtechnologyaswellas

economicalrationalityaccordingtotheoccupanciesandfirehazardsofthebuilding.

1.0.6Inadditiontocomplywiththerequirementsofthiscode，buildingswithheightgreaterthan250m

shallbeprotectedwithstricterfireprotectionmeasuresaccordingtotheactualsituation.Fireprotection

designsolutionsofsuchbuildingsshallbediscussedandreviewedbythenationalfireauthorities.

1.0.7Inadditiontotherequirementsofthiscode，fireprotectiondesignofbuildingsshallalsocomply

withthosespecifiedintherelevantcurrentnationalstandards.

·1·2Termsandsymbols

2.1Terms

2.1.1high-risebuilding

Residentialbuildingswithbuildingheightgreaterthan27mandnon-single-storeyfactory

buildings，storagesandothercivilbuildingswithbuildingheightgreaterthan24m.

Note：ThecalculationofbuildingheightshallcomplywiththosespecifiedinAppendixAofthiscode.

2.1.2podium

Theancillarypartofahigh-risebuilding，whoseheightisnotgreaterthan24m，andisconnectedto

themainbodyofthehigh-risebuildingbutisbeyondtheprojectionrangeofthemainbody.

2.1.3importantpublicbuilding

Thecivilbuildingotherthanresidentialbuildingthatmaycauseheavycasualtiesandproperty

losses，severesocialimpactincaseoffire.

2.1.4smallcommercialspaces

Commercialspacessuchasshops，postoffices，banks，barbershopslocatedonthefirstfloororthe

firstandsecondfloorsoftheresidentialbuildings，withthebuildingareaofeachseparatedunitnot

2

greaterthan300m.

2.1.5highrackstorage

Rackstoragewithrackheightgreaterthan7mandwithmechanicaloperationorautomaticcontrol.

2.1.6semi-basement

Aspacehavingitsaverageclearheightgreaterthan1/3butlessthan1/2belowfinishedgroundlevel.

2.1.7basement

Aspacehavingmorethanhalfitsaverageclearheightbelowfinishedgroundlevel.

2.1.8openflamelocation

Anindoororoutdoorlocationwithopenflameorred-hotsubjects，excludingcookingutensils，

inductioncookerandthelikeinacivilbuilding.

2.1.9sparkingsite

Alocationlikechimneywithflyingfire，orforsuchoperationsasoutdoorgrindingwheel，electric

welding，gasweldingandgascutting.

2.1.10fire-resistancerating

Aperiodoftimethatstartsfromabuildingelement，componentorassemblythatareexposedto

fireunderstandardfireconditions，tothetimethattheylosebearingcapacity，integrityorinsulation，

expressedinhours.

2.1.11firepartitionwall

Noncombustiblewallinabuildingwhichpreventsfirefromspreadingtoadjoiningareaswithfire-

resistanceratingnotlessthanthespecifiedrequirementsofthecode.

2.1.12firewall

Noncombustiblewallwhichpreventsfirefromspreadingtoadjoiningbuildingsoradjoining

horizontalfirecompartmentswithfire-resistanceratingnotlessthan3.00h.

·2·2.1.13refugefloo（rroom）

Afloo（rroom）inabuildingthattemporarilyprotectspeoplefromfireandsmoke.

2.1.14exit

Entrancetoastaircase/externalstairsforevacuationofpeopleorthatdirectlyleadingtointernal

and/orexternalsafeplaces，includingstoreyexitandfinalexit.

2.1.15enclosedstairway

Staircasewithadooratitsentrancetopreventsmokeandheatfromenteringintoit.

2.1.16smokeproofstaircase

Staircasewithsuchfacilitiesassmokeproofvestibule，openbalconyorconcavecorrido（rcollectively

namedas"vestibule"）atitsentrance，allthedoorsleadingtothevestibuleandstaircasearefiredoors，

whichpreventsmokeandheatfromenteringintoit.

2.1.17refugepassageway

Passagewayforpeopletorefugetemporarilyandevacuatesafelytotheoutsidebyproviding

smokeproofmeasuresandfirepartitionwallswithfire-resistanceratingnotlessthan3.00honboth

sides.

2.1.18flashpoint

Underspecifiedtestconditions，theminimumtemperature（determinedbyclosedcupmethod）ofa

liquidorsolidatwhichvaporgivesoffnearthesurfaceoftheliquidorsolidtoformanignitablemixture

withair，andwillflashinthepresenceofanignitionsource.

2.1.19lowerexplosivelimi（tLEL）

Theminimumconcentrationofthemixtureofcombustiblevapor，gasordustwithairthatis

capableofexplodinginthepresenceofanignitionsource.

2.1.20boil-overoil

Oilproductsthatcontainwaterandcanproducethermalwaveduringcombustion.

2.1.21fireseparationdistance

Aspatialseparationthatpreventsaburningbuildingfromignitingitsadjacentbuildingswithin

certaintimeandfacilitatesfire-fighting.

Note：ThecalculationmethodoffireseparationdistanceshallcomplywiththosespecifiedinAppendixBofthecode.

2.1.22firecompartment

Enclosedspacewithinabuildingseparatedfromadjoiningspacesbyfirewalls，floorsandother

constructionshavingaspecifiedfireresistance.

2.1.23solidstream

Ajetlengthfromthehosenozzletotheholewithdiameteras380mm，fromwhich90%ofthe

waterstreampassesthrough.

2.2Symbols

A—Pressurereliefarea；

C—Pressurereliefratio；

D—Diameterofstoragetank；

DN—Nominaldiameterofpipe；

ΔH—Heightdifferenceofbuildings；

·3·L—LengthofEnclosedsectionofatunnel；

N—Numberofpeople；

n—Numberofseats；

K—Characteristicindexofexplosion；

V—Volumeofbuildingandstackyardorthevolumeorcapacityoftankorcylinder；

W—Capacityofstackyardforcombustiblesorgrainsilo，binandbarn.

·4·3Factorybuildingsandstorages

3.1Classificationoffirehazards

3.1.1Firehazardofproductionshallbeclassifiedaccordingtosuchfactorsasthepropertiesand

quantityofsubstancesusedorgeneratedduringproduction.ItisclassifiedintoClassA，B，C，DandE，

andshallbeinaccordancewiththosespecifiedinTable3.1.1.

Table3.1.1Classificationoffirehazardsofproduction

Firehazardclass

Firehazardcharacteristicsofproductionusingorgeneratingthefollowingsubstances

ofproduction

1.Liquidwithflashpointlessthan28℃；

2.GaswithLELlessthan10%；

3.Substancesbeingcapableofspontaneousdecompositionatnormaltemperatureoroxidizingintheairandresultin

rapidspontaneousignitionorexplosion；

4.Substancesbeingcapableofgeneratingcombustiblegasandcausingcombustionorexplosionatnormal

temperatureundertheactionofwaterorthewatervaporintheair；

A

5.Strongoxidizerwhichtendstocausecombustionorexplosionincaseofmeetingacid，heat，impact，friction，

catalysisaswellasorganicsubstanceorflammableinorganicsubstanceslikesulphuretc.；

6.Substanceswhichcancausecombustionorexplosionincaseofbeingimpacted，rubbedorbeingexposedtooxidizer

andorganicsubstances；

7.Productionwheretheoperatingtemperatureinsidetheenclosedequipmentisnotlessthanthespontaneousignition

temperatureofthesubstance

1.Liquidwithflashpointnotlessthan28℃butlessthan60℃；

2.GaswithLELnotlessthan10%；

3.OxidizernotbelongingtoClassA；

B

4.FlammablesolidnotbelongingtoClassA；

5.Combustion-supportinggas；

6.Floatingdust，fiberandliquidfogdropwithflashpointnotlessthan60℃，whichiscapableofformingexplosive

mixturewiththeair

1.Liquidwithflashpointnotlessthan60℃；

C

2.Combustiblesolid

1.Productionwherenoncombustiblesubstanceisprocessed，withstrongradiantheat，sparkorflamefrequently

generatedathightemperatureormoltenstate；

D

2.Variousproductionwheregas，liquidandsolidareusedasfuelorgasandliquidcombustsforotherpurpose；

3.Difficultcombustiblesthatareusedorprocessedatambienttemperature

ENoncombustiblesthatareusedorprocessedatambienttemperature

·5·3.1.2Whenproductionwithdifferentfirehazardsiscarriedoutinthesamefactorybuildingorinany

firecompartmentthereof，thefirehazardclassificationofproductioninthatfactorybuildingorinthatfire

compartmentshallbedeterminedaccordingtothepartwithhigherfirehazard；whenthequantityof

flammablesorcombustiblesusedorgeneratedduringproductionissmallandisinsufficienttocause

explosion/firehazard，thefirehazardclassificationmaybedeterminedaccordingtotheactual

conditions；whenoneofthefollowingconditionsismet，thefirehazardclassificationmaybedetermined

accordingtothepartwithlowerfirehazard：

1Thefloorareaoftheproductionpartwithhigherfirehazardislessthan5%ofthegrossfloor

areaofthefloororthefirecompartmentortheareaofpaintspraysectioninClassDandEfactory

buildingsislessthan10%，andfirecannotspreadtootherpartsduringfireaccidentortheproduction

partwithhigherfirehazardhasbeentakenwitheffectivefirepreventionmeasures；

2TheareaofpaintspraysectioninClassDandEfactorybuildingsisnotlargerthan20%ofthe

grossfloorareaofthefirecompartment，providedthatthesectionisenclosedandnegativelypressurized，

combustiblegasdetectionandalarmsystemorautomaticexplosionsuppressionsystemisinstalled.

3.1.3Thefirehazardofstoredmaterialsshallbeclassifiedaccordingtosuchfactorsastheproperties

ofstoredmaterialsandthequantityofcombustiblesinthestoredmaterials.ItisclassifiedintoClassA，

B，C，DandE，andshallbeinaccordancewiththosespecifiedinTable3.1.3.

Table3.1.3Classificationoffirehazardsofstoredmaterials

Firehazardclassof

Firehazardcharacteristicsofstoredmaterials

storedmaterials

1.Liquidwithflashpointlessthan28℃；

2.GaswithLELlessthan10%，solidsubstancewhichcangenerategaswithLELlessthan10%undertheaction

ofwaterorthewatervaporintheair；

3.Substancesbeingcapableofspontaneousdecompositionatnormaltemperatureoroxidizingintheairandresult

inrapidspontaneousignitionorexplosion；

A4.Substancesbeingcapableofgeneratingcombustiblegasandcausingcombustionorexplosionatnormal

temperatureundertheactionofwaterorthewatervaporintheair；

5.Strongoxidizerwhichisapttocausecombustionorexplosionincaseofmeetingacid，heat，impactandfrictionas

wellasorganicsubstanceorflammableinorganicsubstanceslikesulphuretc.；

6.Substancewhichcancausecombustionorexplosionincaseofbeingimpacted，rubbedorbeingexposedto

oxidizerandorganicsubstance

1.Liquidwithflashpointnotlessthan28℃butlessthan60℃；

2.GaswithLELnotlessthan10%；

3.OxidizernotbelongingtoClassA；

4.FlammablesolidnotbelongingtoClassA；

B

5.Combustion-supportinggas；

6.Materialswhichoxidizeslowlyatnormaltemperatureifbeingexposedtotheairandcausespontaneousignition

duetoaccumulatedheat

1.Liquidwithflashpointnotlessthan60℃；

C

2.Combustiblesolid

D

Difficult-combustibles

ENoncombustibles

·6·3.1.4Whenmaterialswithdifferentfirehazardsarestoredinthesamestorageorinthesamefire

compartmentthereof，thefirehazardofthestorageorthefirecompartmentshallbedetermined

accordingtothestoredmaterialswiththehighestfirehazard.

3.1.5AsforthestoragesofClassDandE，iftheweightofcombustiblepackageislargerthan1/4of

thatofthestoredmaterialsorthevolumeofcombustiblepackageislargerthan1/2ofthatofthestored

materials，theclassificationofthefirehazardshallbeClassC.

3.2Fire-resistanceclassoffactorybuildingsandstorages

3.2.1Thefire-resistanceclassoffactorybuildingsandstoragesareclassifiedintoClassⅠ，Ⅱ，Ⅲand

Ⅳ.Thecombustibilityandfire-resistanceratingofcorrespondingbuildingelementsshallbenotless

thanthosespecifiedinTable3.2.1unlessotherwiserequiredbyprovisionsofthiscode.

Table3.2.1Combustibilityandfire-resistancerating（h）ofbuildingelementsfor

factorybuildingandstoragewithdifferentfire-resistanceclass

Fire-resistanceclass

Elements

ClassⅠClassⅡClassⅢClassⅣ

NoncombustibleNoncombustibleNoncombustibleNoncombustible

Firewall

3.003.003.003.00

NoncombustibleNoncombustibleNoncombustible

Difficult-combustible

Load-bearingwall

3.002.502.00

0.50

WallsofstaircaseandvestibuleNoncombustibleNoncombustibleNoncombustible

Difficult-combustible

Wall

Wallsofelevatorshaft2.002.001.50

0.50

PartitionwallsonbothsidesofNoncombustibleNoncombustibleNoncombustible

Difficult-combustible

exitpassageway1.001.000.50

0.25

NonbearingexteriorwallNoncombustibleNoncombustible

Difficult-combustibleDifficult-combustible

Roompartitionwall0.750.50

0.500.25

NoncombustibleNoncombustibleNoncombustible

Difficult-combustible

Column

3.002.502.00

0.50

NoncombustibleNoncombustibleNoncombustible

Difficult-combustible

Beam

2.001.501.00

0.50

NoncombustibleNoncombustibleNoncombustible

Difficult-combustible

Floor

1.501.000.75

0.50

NoncombustibleNoncombustible

Difficult-combustible

Combustible

Roofload-bearingelements

1.501.00

0.50

NoncombustibleNoncombustibleNoncombustible

ExitstairCombustible

1.501.000.75

Noncombustible

Difficult-combustibleDifficult-combustible

Suspendedceiling（includingceilingjoist）Combustible

0.25

0.250.15

Note：AsforthesuspendedceilingmadeofnoncombustiblematerialsinbuildingswithClassⅡfireresistance，itsfire-resistanceratingis

notrequired.

·7·3.2.2Thefire-resistanceclassofhigh-risefactorybuildingsandClassAandBfactorybuildings

shallbeatleastClassⅡ.Independentsingle-storeyClassAandBfactorybuildingswithbuilding

2

areanotgreaterthan300mmaybeClassⅢ.

3.2.3Thefire-resistanceclassshallbenotlessthanClassⅢforsingle-/multi-storeyClassC

factorybuildingsandmulti-storeyClassDandEfactorybuildings.

Thefire-resistanceclassshallbenotlessthanClassⅡforfactorybuildingswhereClassC

liquidsareusedorgenerated，andClassDfactorybuildingswherespark，red-hotsubjectsoropen

flamearepresent.Thefire-resistanceclassmaybeClassⅢforsingle-storeyClassCfactory

2

buildingswithbuildingareanotgreaterthan500morsingle-storeyClassDfactorybuildingswith

2

buildingareanotgreaterthan1000m.

3.2.4Thefire-resistanceclassshallbenotlessthanClassⅡforbuildingswhereparticularly

valuableequipmentorarticlessuchasmachinery，instrumentsandapparatusesareinstalledor

stored.

3.2.5Fire-resistanceclassshallbenotlessthanClassⅡforboilerroom.Incaseofcoal-firedboiler

roomwithtotalevaporationcapacitynotgreaterthan4t/h，thefire-resistanceclassmaybeClassⅢ.

3.2.6Fire-resistanceclassshallbenotlessthanClassⅡforoil-immersedtransformerroomandhigh-

voltagedistributionsubstation.Theotherfireprotectiondesignshallcomplywiththerequirementsof

currentnationalstandardslikeGB50229StandardforDesignofFireProtectionforFossilFuelPower

PlantsandSubstationsetc.

3.2.7Fire-resistanceclassshallbenotlessthanClassⅡforhighrackstorages，high-rise

storages，ClassAstorages，multi-storeyClassBstorages，multi-storeyClassCstoragesstoring

combustibleliquid.

Fire-resistanceclassshallbenotlessthanClassⅢforsingle-storeyClassBstorages，single-

storeyClassCstorages，multi-storeyClassCstoragesstoringcombustiblesolidsandmulti-storey

ClassDandEstorages.

3.2.8Fire-resistanceclassofgrainsilosshallbenotlessthanClassⅡ；ClassⅡgrainsilocanbe

constructedwithsteel.

Fire-resistanceclassofgrainstorehousesshallbenotlessthanClassⅢ；unprotectedmetalload-

bearingelementscanbeusedforClassⅡbulkgrainstorehouses.

3.2.9Fire-resistanceratingoffirewallsshallbenotlessthan4.00hforClassAandBfactory

buildingsandClassA，BandCstorages.

3.2.10Fire-resistanceratingofcolumnsshallbenotlessthan2.50hand2.00hrespectivelyforClass

ⅠorClassⅡsingle-storeyfactorybuildings（storages）.

3.2.11Fire-resistanceratingofroofload-bearingelementsshallbenotlessthan1.00hforClassⅠ

single-/multi-storeyfactorybuildings（storages）fullyprotectedbysprinklersystem.

3.2.12FornonbearingexteriorwallofClassⅠandClassⅡbuildings，otherthanClassAandB

storagesandhigh-risestorages，whenitisnoncombustible，thefire-resistanceratingshallbenotless

than0.25h；whenitisdifficult-combustible，thefire-resistanceratingshallbenotlessthan0.50h.

Thefire-resistanceratingofthenonbearingexteriorwallisnotrequiredforClassDandEfactory

building（storage），providedthatthefire-resistanceclassofthebuildingisClassⅠorClassⅡ

buildings，theheightofthebuildingis4storeysorless，andnonbearingexteriorwallsare

noncombustible.

·8·3.2.13WhentheroompartitionwallofClassⅡfactorybuildings（storages）isdifficult-combustible，its

fire-resistanceratingshallbeincreasedby0.25h.

3.2.14Whenpre-stressedreinforcedconcretefloorslabisusedinClassⅡmulti-storeyfactory

buildingsandstorages，itsfire-resistanceratingshallbenotlessthan0.75h.

3.2.15FortheaccessibleflatroofofClassⅠorClassⅡfactorybuildings（storages），thefire-

resistanceratingoftheroofslabshallbenotlessthan1.50hand1.00hrespectively.

3.2.16RoofslabofClassⅠorClassⅡfactorybuildings（storages）shallbenoncombustible.

Roofwaterbarriershouldbenoncombustibleordifficult-combustible.Whencombustiblewater

barrierisusedandlaidoncombustibleordifficult-combustiblethermalinsulationmaterials，thewater

barrierorthecombustible，difficult-combustiblethermalinsulationmaterialsshallbeprotectedwith

noncombustiblematerials.

3.2.17Ifitisnecessarytousemetalsandwichboardasnonbearingexteriorwall，roompartitionwallor

roofslab，thecorematerialshallbenoncombustibleanditsfire-resistanceratingshallcomplywiththe

relevantrequirementsofthiscode.

3.2.18Unlessotherwiserequiredbyprovisionsofthiscode，thefire-resistanceclassmaybeclassified

asClassⅣforfactorybuildings（storages）withload-bearingwoodencolumnsandnoncombustible

walls.

3.2.19Fireprotectionmeasuresshallbetakenfortheexposedjointsofprecastreinforcedconcrete

elements，andthefire-resistanceratingofthejointsshallbenotlessthanthatofthecorresponding

elements.

3.3Storeys，areasandplanearrangementoffactorybuildingsandstorages

3.3.1Unlessotherwiserequiredbyprovisionsofthiscode，thenumberofstoreysoffactory

buildingsandthemaximumpermissiblegrossfloorareaofeachfirecompartmentshallbein

accordancewiththosespecifiedinTable3.3.1.

Table3.3.1Numberofstoreysoffactorybuildingsandmaximum

permissiblegrossfloorareaofeachfirecompartment

2

Maximumpermissiblegrossfloorareaofeachfirecompartment（m）

Maximum

Undergroundorsemi-

Firehazard

Fire-resistance

permissible

undergroundfactory

classification

classoffactory

Single-storeyMulti-storeyHigh-rise

numberof

building（including

ofproduction

building

factorybuildingfactorybuildingfactorybuilding

storeys

basementandsemi-

basement）

ClassⅠPreferably40003000----

A

ClassⅡSinglestorey30002000----

ClassⅠUnlimited500040002000--

B

ClassⅡ6400030001500--

ClassⅠUnlimitedUnlimited60003000500

CClassⅡUnlimited800040002000500

ClassⅢ230002000----

·9·Table3.3.1（continued）

2

Maximumpermissiblegrossfloorareaofeachfirecompartment（m）

Maximum

Undergroundorsemi-

FirehazardFire-resistance

permissible

undergroundfactory

classification

classoffactory

Single-storeyMulti-storeyHigh-rise

numberof

building（including

ofproduction

building

factorybuildingfactorybuildingfactorybuilding

storeys

basementandsemi-

basement）

ClassⅠandⅡ

UnlimitedUnlimitedUnlimited40001000

DClassⅢ340002000----

ClassⅣ11000------

ClassⅠandⅡUnlimitedUnlimitedUnlimited60001000

EClassⅢ

350003000----

ClassⅣ11500------

Notes：1Thefirecompartmentsshallbeseparatedbyfirewalls.ClassⅠorClassⅡfactorybuildingsotherthanClassAfactory

buildingmayusefireshutterorwatercurtainasfireseparationifthegrossfloorareaofitsfirecompartmentislarger

thanwhatrequiredinthistableanditisindeeddifficulttobeseparatedbyafirewall.Ifafireshutterisused，itshall

complywiththerequirementsofSection6.5.3ofthiscode；ifwatercurtainisused，itshallcomplywiththerequirements

ofthecurrentnationalstandardGB50084CodeforDesignofSprinklerSystems.

2AsforClassⅠmulti-storeytextilefactorybuildingsandClassⅡsingle-/multi-storeytextilefactorybuildingsotherthan

flaxmills，themaximumpermissiblegrossfloorareaofeachfirecompartmentmaybeincreasedby0.5timesofthose

specifiedinthistable，buttherawcottonunpackingandblowingworkshopsshallbeseparatedfromtheremainderofthe

buildingbyfirepartitionwallswithfire-resistanceratingnotlessthan2.50h；ifopeningssuchasdoors，windowsorthe

likeareprovided，theopeningsshallbeprotectedbyClassAfiredoorsorwindows.

3AsforClassⅠorⅡsingle-/multi-storeypapermillswithmultipleprocesses，themaximumpermissiblegrossfloorarea

ofeachfirecompartmentmaybeincreasedby1.5timesofthosespecifiedinthistable.AsforClassⅠorⅡwetpaper

mills，ifautomaticfireextinguishingsystemisprovidedinthedryerhoodofpapermachineandeffectivefire

extinguishingfacilitiesareprovidedatthefinishingsectionforthepurposeoffireprotection，themaximumpermissible

grossfloorareaofeachfirecompartmentmaybedeterminedaccordingtotheprocessneeds.

4Ifthenumberofworkersateachstoreydoesnotexceed2，thenumberofstoreyofClassⅠorⅡgrainsiloisnotlimited.

5TheproductionareasinClassⅠorⅡmulti-processcigarettefactorybuildingsforrawmaterial，stock，grouping

formulation，cigaretteprocessing，storingandpacking，auxiliarymaterialturnover，temporarystorageoffinished

productsandcarbondioxidedilatatetobaccoshredshallbefireseparatedfromeachother.Firewallsshallbeusedwhen

theprocessconditionspermit.However，thespacesforcigaretteprocessing，storingandpackingmaybearrangedwithin

onefirecompartment.Themaximumpermissiblegrossfloorareaofthefirecompartmentmaybedeterminedaccording

totheneedsoftheprocess，butthespacesforcigaretteprocessing，storingandpackingshallbeseparatedby2.00hfire-

resistance-ratedpartitionwallsand1.00hfire-resistance-ratedfloors.Inaddition，propermeasuresshallbetakento

protecttheopeningsbetweenhorizontalandverticalfireseparationssoastopreventfirespreading.

6Asfortheoperationplatformandrepairplatforminfactorybuildings，iftheoccupantloadislessthan10，theplatform

areamaynotbecountedintothegrossfloorareaofthefirecompartment.

7"--"means"notpermitted".

3.3.2Unlessotherwiserequiredbyprovisionsofthiscode，thenumberofstoreysandareaof

storagesshallbeinaccordancewiththosespecifiedinTable3.3.2.

·10·

·11·

Table3.3.2Numberofstoreysandareaofstorages

2

Maximumpermissiblefirstfloorareaofeachstorageandmaximumpermissiblegrossfloorareaofeachfirecompartment（m）

Undergroundorsemi-

undergroundstorage

FirehazardMaximum

Single-storeystorageMulti-storeystorageHigh-risestorage

Fire-resistance

（includingbasementand

classificationofstoredpermissible

classofstorages

materialsnumberofstoreyssemi-basement）

FireFire

EachstorageFirecompartmentEachstorageEachstorageFirecompartment

compartmentcompartment

Item3and4ClassⅠ118060----------

A

Item1，2，5and6ClassⅠandⅡ1750250----------

ClassⅠandⅡ32000500900300------

Item1，3and4

ClassⅢ1500250----------

B

ClassⅠandⅡ528007001500500------

Item2，5and6

ClassⅢ1900300----------

ClassⅠandⅡ5400010002800700----150

Item1

----

ClassⅢ11200400------

C

ClassⅠandⅡUnlimited600015004800120040001000300

Item2

ClassⅢ321007001200400------

·12·

Table3.3.2（continued）

2

Maximumpermissiblefirstfloorareaofeachstorageandmaximumpermissiblegrossfloorareaofeachfirecompartment（m）

Undergroundorsemi-

undergroundstorage

FirehazardMaximum

Single-storeystorageMulti-storeystorageHigh-risestorage

Fire-resistance

（includingbasementand

classificationofstoredpermissible

classofstorages

materialsnumberofstoreys

semi-basement）

FireFire

EachstorageFirecompartmentEachstorageEachstorageFirecompartment

compartmentcompartment

ClassⅠandⅡUnlimitedUnlimited3000Unlimited150048001200500

DClassⅢ3300010001500500-----

ClassⅣ12100700---------

ClassⅠandⅡUnlimitedUnlimitedUnlimitedUnlimited2000600015001000

EClassⅢ3300010002100700-----

ClassⅣ12100700---------

Notes：1Firecompartmentsinthestoragesmustbeseparatedbyfirewalls.Thereshallbenoopeningslikedoors，windowsandthelikeinthefirewallsofClassAandBstorages.Themaximum

permissiblefirstfloorareaofundergroundorsemi-undergroundstorages（includingbasementandsemi-basement）shallbenotgreaterthanthatoftheabovegroundstoragesofthe

correspondingclass.

2ThebarreloilstoragesinoildepotshallcomplywiththerequirementsofthecurrentnationalstandardGB50074CodeforDesignofOilDepot.

2

3ForClassⅠ，Ⅱcoalhomogenizationsilo，themaximumpermissiblegrossfloorareaofeachfirecompartmentshallbenotgreaterthan12000m.

4Forindependentlybuiltammoniumnitratestorages，calciumcarbidestorages，thestoragesofmoleculeproductssuchaspolyethylene，ureastorages，blendedcoalstorages，independent

finishedproductstoragesofpapermill，whenthefire-resistanceclassofthebuildingisnotlessthanClassⅡ，themaximumpermissiblefirstfloorareaofeachstorageandthemaximum

permissiblegrossfloorareaofeachfirecompartmentmaybeincreasedby1.0timesofthosespecifiedinthistable.

2

5ThemaximumpermissiblefirstfloorareaofClassⅠorⅡgrainstorehouseshallbenotgreaterthan12000m，andthemaximumpermissiblegrossfloorareaofeachfirecompartmentshall

22

benotgreaterthan3000m；themaximumpermissiblefirstfloorareaofClassⅢgrainstorehouseshallbenotgreaterthan3000m，andthemaximumpermissiblegrossfloorareaofeach

2

firecompartmentshallbenotgreaterthan1000m.

2

6ForClassⅠorⅡsingle-storeycottonwarehousewithfirstfloorareanotgreaterthan2000m，themaximumpermissiblegrossfloorareaofeachfirecompartmentshallbenotgreaterthan

2

2000m.

7ThemaximumpermissiblefirstfloorareaofClassⅠorⅡcoldstoreanditsmaximumpermissiblegrossfloorareaoffirecompartmentshallcomplywiththerequirementsofthecurrent

nationalstandardGB50072CodeforDesignofColdStore.

8"--"means"notpermitted".3.3.3Whereautomaticfireextinguishingsystemisprovidedinfactorybuildings，themaximum

permissiblegrossfloorareaofeachfirecompartmentmaybeincreasedby1.0timesofthosespecifiedin

Section3.3.1ofthiscode.WhereautomaticfireextinguishingsystemisprovidedinClassDandE

factorybuildings，themaximumpermissiblegrossfloorareaofeachfirecompartmentisnotlimited.

Whereautomaticfireextinguishingsystemisprovidedinpartofthefactorybuildings，onlytheareaof

thatpartcanbeincreasedby1.0times.

Whereautomaticfireextinguishingsystemisprovidedinthestorages，boththemaximum

permissiblefirstfloorareaofthestoragesandthemaximumpermissiblegrossfloorareaofeachfire

compartmentmaybeincreasedby1.0timesofthosespecifiedinSection3.3.2ofthiscode.The

maximumpermissiblegrossfloorareaofthefirecompartmentofcoldstoreshallnotbeincreasedeven

ifautomaticfireextinguishingsystemisprovided.

3.3.4Placesusing，generatingorstoringClassAandBsubstancesshallnotbepermittedin

undergroundorsemi-undergroundbuildings.

3.3.5Staffdormitorymustbestrictlyprohibitedinfactorybuildings.

OfficesandstaffloungesshallbenotpermittedinClassAandBfactorybuildings；ifoffices

andstaffloungesmustbebuiltadjoiningtothefactorybuildings，thefire-resistanceclassofthe

office（stafflounge）buildingshallbenotlessthanClassⅡ，andthecommonwallshallbe

explosion-proofwallwithfire-resistanceratingnotlessthan3.00h，anddedicatedexitsshallbe

provided.

OfficesandstaffloungeslocatedinClassCfactorybuildingsshallbeseparatedfromthe

remainderofthebuildingbyfirepartitionwallswithfire-resistanceratingnotlessthan2.50hand

floorwithfire-resistanceratingnotlessthan1.00h，andatleast1dedicatedexitshallbeprovided.

DoorsinthefirepartitionwallshallbeClassBfiredoors.

3.3.6Intermediatestorageslocatedinfactorybuildingsshallcomplywiththefollowing

requirements：

1ClassAorBintermediatestoragesshallbeclosetotheexternalwalls，thestoragecapacity

shouldnotexceedthedemandfor24h；

2ClassA，BandCintermediatestoragesshallbeseparatedfromtheremainderofthe

buildingbyfirewallsandnoncombustiblefloorswithfire-resistanceratingnotlessthan1.50h；

3ClassDandEintermediatestoragesshallbeseparatedfromtheremainderofthebuildingby

firepartitionwallswithfire-resistanceratingnotlessthan2.00handfloorswithfire-resistanceratingnot

lessthan1.00h；

4Thefire-resistanceclassandfirstfloorareaofstoragesshallcomplywiththerequirementsof

Article3.3.2andArticle3.3.3ofthiscode.

3.3.7ClassCintermediatetanksinthefactorybuildingsshallbearrangedinaseparatedroomandits

3

capacityshallbenotgreaterthan5m.Theroomswithintermediatetanksshallbeseparatedfromthe

remainderofthebuildingbyfirepartitionwallswithfire-resistanceratingnotlessthan3.00handfloors

withfire-resistanceratingnotlessthan1.50h，thedooroftheroomshallbeClassAfiredoor.

3.3.8Transformeranddistributionsubstationshallnotbepermittedtobeinoradjoiningto

ClassAandBfactorybuildings，andshallnotbeexposedtohazardousareascontainingexplosive

gasordust.Transformeranddistributionsubstationwithcapacityas10kVorlessdedicatedforthe

powersupplyofClassAorBfactorybuildingsmaybeadjoinedtoonlyoneexternalwallofthe

·13·factorybuilding，andthewallshallbefirewallwithoutopeningssuchasdoor，windoworthelike.

Moreover，thesubstationshallcomplywiththerequirementsofthecurrentnationalstandardGB50058

CodeforDesignofElectricalInstallationsinExplosiveAtmospheres，etc..

FordistributionsubstationdedicatedforClassBfactorybuildings，windowsinthefirewall

shallbeClassAfirewindows.

3.3.9Staffdormitorymustbestrictlyprohibitedinthestorages.

OfficesandstaffloungesmustnotbepermittedinoradjoiningtoClassAandBstorages.

WhereofficesandstaffloungesarepermittedinClassCandDstorages，theofficesandstaff

loungesshallbeseparatedfromtheremainderofthebuildingbyfirepartitionwallwithfire-

resistanceratingnotlessthan2.50handfloorwithfire-resistanceratingnotlessthan1.00h，and

dedicatedexitshallbeprovided.Whereitisnecessarytoprovidedoorsinthepartitionwall，Class

Bfiredoorsshallbeinstalled.

3.3.10Fireprotectiondesignoflogisticsbuildingsshallcomplywiththefollowingrequirements：

1Wherethemainfunctionofthebuildingissortingorprocessing，thefireprotectiondesignshall

complywiththerelevantrequirementsoffactorybuildingsofthiscode；thestoragepartshallcomply

withtherequirementsforintermediatestorages.

2Wherethemainfunctionofthebuildingisstorageoritisdifficulttodistinguishitsmain

function，thefireprotectiondesignshallcomplywiththerelevantrequirementsofstoragesofthiscode.

However，wheretheoperatingareassuchassortingareaarecompletelyseparatedfromstorageareas，

thefireprotectionrequirementsofoperatingareasmaycomplywiththerelevantrequirementsoffactory

buildingsandstorageareasmaycomplywiththerequirementsofstoragesofthiscode.

Wheretheoperatingareassuchassortingareaarecompletelyseparatedfromthestorageareasby

firewall，andwhenthefollowingconditionsaremet，exceptClassChighrackstorageswithautomatic

control，themaximumpermissiblegrossfloorareaofthefirecompartmentsinthestorageareaandthe

maximumpermissiblefirstfloorareaofthestoragemaybeincreasedby3.0timesoftherequirements

specifiedinTable3.3.2（notincludethenotes）ofthiscode：

1）StoringClassCmaterialsexceptcombustibleliquid，cotton，linen，silk，woolandother

textiles，foamplastic，andthefire-resistanceclassofthebuildingisnotlessthanClassⅠ；

2）StoringClassDandEmaterialsandthefire-resistanceclassofthebuildingisnotlessthan

ClassⅡ；

3）Thewholebuildingisprotectedbyautomaticwaterfireextinguishingsystemsandfirealarm

systems.

3.3.11NorailwaylineshallbepermittedinClassAandBfactorybuildings（storages）.

ForClassC，DandEfactorybuildings（storages），wheresteamordiesellocomotivesare

permittedtoaccess，theroofshallbenoncombustibleorfireprotectedbyothermeans.

3.4Fireseparationdistanceoffactorybuildings

3.4.1Unlessotherwiserequiredbyprovisionsofthiscode，thefireseparationdistancebetween

anytwofactorybuildings，betweenanyfactorybuildingsandanyClassB，C，DandEstorages，

betweenanyfactorybuildingsandcivilbuildingsetc.shallbenotlessthanthosespecifiedinTable

3.4.1.FireseparationdistancebetweenfactorybuildingandClassAstorageshallcomplywith

thosespecifiedinArticle3.5.1ofthiscode.

·14·

·15·

Table3.4.1Fireseparationdistancebetweenanytwofactorybuildings，factorybuildings

andClassB，C，DandEstorages，factorybuildingsandcivilbuildings（m）

ClassAfactoryClassBfactorybuildingsClassC，DandEfactorybuildings

Civilbuildings

buildings（storages）（storages）

Single/multi-Single-/multi-High-Podiumandsingle-/multi-

Single-/multi-storeyHigh-riseHigh-rise

Name

storeystoreyrisestorey

ClassⅠClassⅠClassClassⅠClassⅠClassⅠClassⅠ

ClassⅢClassⅣClassⅢClassⅣClassⅠClassⅡ

andⅡandⅡⅢandⅡandⅡandⅡandⅡ

ClassAfactory

Single-/multi-

ClassⅠandⅡ1212141312141613

buildings

storey

ClassⅠandⅡ1210121310121413

Single-/multi-2550

ClassBfactory

storey

ClassⅢ1412141512141615

buildings

ClassⅠandⅡ1313151313151713

High-rise

ClassⅠandⅡ1210121310121413101214

2015

Single-/multi-

ClassⅢ1412141512141615121416

ClassCfactory

storey

2520

buildings

ClassⅣ161416171416181714

1618

ClassⅠandⅡ13131513131517131315172015

High-rise

ClassⅠandⅡ1210121310121413

1012141513

Single-/multi-

ClassDandE

ClassⅢ1412141512141615121416

storey

factory

1815

ClassⅣ16141617141618

buildings17141618

ClassⅠandⅡ13131513131517131315171513

High-rise

·16·

Table3.4.1（continued）

ClassAfactoryClassBfactorybuildingsClassC，DandEfactorybuildings

Civilbuildings

buildings（storages）（storages）

Single/multi-Single-/multi-High-Podiumandsingle-/multi-

Single-/multi-storeyHigh-riseHigh-rise

Name

storeystoreyrisestorey

ClassⅠClassⅠClassClassⅠClassⅠClassⅠClassⅠ

ClassⅢClassⅣClassⅢClassⅣClassⅠClassⅡ

andⅡandⅡⅢandⅡandⅡandⅡandⅡ

Outdoor

≥5，≤101215201215202520

transformerandTotaloilmassof

25252525

＞10，≤501520251520253025

distributiontransformer（t）

substation

＞502025302025303530

Notes：1FireseparationdistancebetweenClassBfactorybuildingsandimportantpublicbuildingsshouldnotbelessthan50m；fireseparationdistancebetweenClassBfactorybuildingsand

openflameorsparkingsiteshouldnotbelessthan30m.Fireseparationdistancebetweensingle-/multi-storeyClassEfactorybuildings，ClassEfactorybuildingsandClassEstorages

maybereducedby2mbasedonthosespecifiedinthistable.Fireseparationdistancebetweensingle-/multi-storeyClassEfactorybuildingsandcivilbuildingsmaytakeClassEfactory

buildingsascivilbuildingsandthenbedeterminedaccordingtotherequirementsof5.2.2ofthiscode.TheseparatelivingareaprovidedforClassC，DandEfactorybuildingsshallbe

designedaccordingtotherequirementsforcivilbuildings.Fireseparationdistancebetweenthelivingareasandthefactorybuildingsshallbenotlessthan6m.Ifitisreallynecessaryto

beadjacent，itshallcomplywiththerequirementsofNote2andNote3ofthistable.

2Whenthehigherexteriorwalloftwoadjacentfactorybuildingsisafirewall，oranyoftheexteriorwallsoftwoadjacentClassⅠorClassⅡbuildingswiththesameheightisafirewall

andthefire-resistanceratingoftheroofisnotlessthan1.00h，thefireseparationdistanceisnotlimited，butthedistancebetweenClassAfactorybuildingsmeetingtheaboveconditions

shallbenotlessthan4m.IftwoadjacentexteriorwallsoftwoClassC，DandEfactorybuildingsarenoncombustible，thesumoftheareaofopeningslikedoor，windoworthelikein

eachwallshallbenotgreaterthan5%oftheexteriorwallarea，thereisnoexposedcombustibleeave，andthedoor，windoworotheropeningsinthetwoadjacentwallsarenotright

oppositetoeachother，thenthefireseparationdistancemaybereducedby25%basedonthosespecifiedinthistable.ClassAandBfactorybuildings（storages）shallnotbeadjoining

withthebuildingsnotspecifiedinArticle3.3.5ofthiscode.

3FortwofactorybuildingswithClassⅠ，Ⅱfire-resistanceclass，wherethelowerexteriorwallisafirewallandtheroofofthelowerfactorybuildinghasnoskylightandfire-resistance

ratingoftheroofisnotlessthan1.00h，orClassAfiredoorandwindoworwatercurtainareprovidedfortheopeningsofdoorandwindowinthehigherexteriorwallorfireshutteris

providedforthemaccordingtotherequirementsofArticle6.5.3ofthiscode，thefireseparationdistancebetweenClassAandBfactorybuildingsshallbenotlessthan6m，andnotbe

lessthan4mforClassC，DandEfactorybuildings.

4Thetotaloilamountofmaintransformerinthepowerplantmaybedeterminedbyoneset.

5Fire-resistanceclassoftheexistingfactorybuildingswiththefire-resistanceclasslowerthanⅣmaybedeemedasClassⅣ.

6WhereClassC，DandEfactorybuildingsareadjacenttoClassC，DandEstorages，itshallcomplywiththerequirementsofNote2andNote3ofthistable.3.4.2FireseparationdistancebetweenClassAfactorybuildingandimportantpublicbuilding

shallbenotlessthan50m，andshallbeatleast30mawayfromopenflameorsparkingsite.

3.4.3FireseparationdistancebetweenClassAfactorybuildingswithcombustiblegasorvaporand

railwayorroadshallbenotlessthanthosespecifiedinTable3.4.3.However，ifsafetymeasuresare

takenfortheloadingandunloadinglinesoftherailwayinClassAfactorybuildings，theirfireseparation

distancemaynotbelimitedbythosespecifiedinTable3.4.3.

Table3.4.3FireseparationdistancebetweenClassAfactorybuildingswith

combustiblegasorvaporandrailwayorroad（m）

In-factoryroadside

Centerlineofoff-factoryCenterlineofin-factory

Name

Off-factoryroadside

railwayrailway

PrimarySecondary

ClassAfactorybuilding302015105

3.4.4Fireseparationdistancebetweenhigh-risefactorybuildingandClassA，B，Cliquidtank，

combustibleandcombustion-supportinggastank，LPGtank，stackyardforcombustibles（except

coalandcokeyards）shallcomplywiththerequirementsofChapter4ofthiscode，andshallbenot

lessthan13m.

3.4.5Wherethefire-resistanceclassofClassC，DandEfactorybuildingandcivilbuildingisClassⅠ

orClassⅡ，thefireseparationdistancebetweenthefactorybuildingandcivilbuildingmaybereduced

tosomeextent，butshallcomplywiththefollowingrequirements：

1Wherethehigherexteriorwallisafirewallwithoutdoor，windoworotheropenings，orthe

exteriorwallwithin15mhigherthantheroofingoftheadjacentlowerbuildingandthepartofthe

exteriorwallbelowisfirewallwithoutdoor，windoworotheropenings，thefireseparationdistanceis

notlimited；

2Iftheadjacentlowerexteriorwallisfirewallandtheroofhasnoskylightoropeningandthe

fire-resistanceratingofroofisnotlessthan1.00h，ortheadjacenthigherexteriorwallisfirewallandthe

openinginthewallisproperlyfireprotected，thefireseparationdistancemaybereduced，butshallbe

notlessthan4m.

3.4.6Ifequipmentforchemicalflammablesisprovidedoutsidethefactorybuilding，thefireseparation

distancebetweentheoutersurfaceoftheequipmentandtheoutersurfaceofauxiliaryequipmentofthe

adjacentfactorybuildingortheexteriorwalloftheadjacentfactorybuildingshallbenotlessthanthose

specifiedinArticle3.4.1ofthiscode.Theoutdoorequipmentmadeofnoncombustiblematerialsmay

beregardedasClassⅠorClassⅡbuildingwhendeterminingthefireseparationdistance.

3

IfClassCliquidtankwiththetotalvolumenotgreaterthan15misdirectlyburiedoutsidethe

exteriorwallofthefactorybuildingandtheexteriorwallwithin4.0mfromthetankisfirewall，thefire

separationdistanceisnotlimited.

3.4.7FireseparationdistancebetweentwoadjacentwingsofaU-shapedorW-shapedfactory

buildingshouldnotbelessthanthosespecifiedinArticle3.4.1ofthiscode.However，wherethefirst

floorareaofthefactorybuildingislessthanthemaximumpermissiblegrossfloorareaofeachfire

compartmentspecifiedinArticle3.3.1ofthiscode，thefireseparationdistancemaybenotlessthan

6m.

3.4.8Excepthigh-risefactorybuildingsandClassAfactorybuildings，wherethesumofthefirstfloor

areaofseveralfactorybuildingsislessthanthemaximumpermissiblegrossfloorareaofthefire

·17·compartmentspecifiedinArticle3.3.1ofthiscode（themaximumpermissiblegrossfloorareaoffire

2

compartmentshallbedeterminedaccordingtothesmallerone，butshallbenotgreaterthan10000mif

itisnotlimited），thesefactorybuildingsmaybearrangedbygroup.Wheretheheightoffactory

buildingsisnotgreaterthan7m，thefireseparationdistancebetweenfactorybuildingswithinagroup

shallbenotlessthan4m；otherwisethedistanceshallbenotlessthan6m.

Fireseparationdistancebetweengroupsorbetweenthegroupandadjacentbuildingsshallbe

determinedbasedontheonewithlowerfire-resistanceclassintwoadjacentbuildingsandthose

specifiedinArticle3.4.1ofthiscode.

3.4.9ClassⅠmotorgasand/orgasolinedispensingstationshallnotbelocatedinurbanbuilt-up

areas.

3.4.10Theclassificationofmotorgasand/orgasolinedispensingstation，thefireseparationdistance

frommotorgasand/orgasolinedispensingstationaswellasthegasoline（gas）dispenser，gasoline（gas）

tanktooff-stationopenflamelocation，sparkingsite，building，railwayorroad，andthefireseparation

distancebetweenin-stationbuildingsorfacilities，shallcomplywiththerequirementsofthecurrent

nationalstandardGB50156CodeforDesignandConstructionofFillingStation.

3.4.11Fireseparationdistancefromtheoutdoortransformeranddistributionsubstationwiththe

voltageof35kV-500kVandthecapacityofeachtransformernotlessthan10MV·A，theoutdoorstep-

downsubstationswiththetotaloilamountoftransformersforindustrialenterprisesgreaterthan5tto

theotherbuildingsshallbenotlessthanthosespecifiedinArticle3.4.1andArticle3.5.1ofthiscode，

respectively.

3.4.12Thedistancebetweentheboundingwallofthefactoryandthebuildingsinthefactoryshould

notbelessthan5m.Thedistancebetweentwobuildingsoneachsideofaboundingwallshallcomply

withthefireseparationdistancerequirementsforcorrespondingbuildings.

3.5Fireseparationdistanceofstorages

3.5.1FireseparationdistancebetweenanytwoClassAstorages，ClassAstorageandother

building，openflamelocationorsparkingsite，railway，roadetc.shallbenotlessthanthose

specifiedinTable3.5.1.

Table3.5.1Fireseparationdistance（m）betweenanytwoClassAstorages，ClassAstorageandother

building，openflamelocationorsparkingsite，railway，roadetc（.m）

ClassAstorage（storagecapacity，t）

ClassAstoredmaterialsClassAstoredmaterials

Name

Item3and4Item1，2，5，and6

≤5＞5≤10＞10

High-risecivilbuildingsandimportantpublicbuildings50

Podium，othercivilbuildings，openflamelocationsorsparking

30402530

sites

ClassAstorages20202020

ClassⅠandⅡ15201215

FactorybuildingsandClassB，

ClassⅢ20251520

C，DandEstorages

ClassⅣ25302025

·18·Table3.5.1（continued）

ClassAstorage（storagecapacity，t）

ClassAstoredmaterialsClassAstoredmaterials

Name

Item3and4Item1，2，5，and6

≤5＞5≤10＞10

Outdoortransformeranddistributionsubstationwiththe

voltageof35kVto500kVandthecapacityofeachtransformer

30402530

notlessthan10MV·A，outdoorstep-downelectricpower

substationswiththetotaloilamountoftransformersfor

industrialenterprisesgreaterthan5t

40

Centerlineofoff-factoryrailway

30

Centerlineofin-factoryrailway

20

Off-factoryroadside

Primary10

In-factoryroadside

Secondary5

Note：WherethestoragecapacityofItem3or4isnotgreaterthan2tandthestoragecapacityofItem1，2，5and6isnotgreater

than5t，thefireseparationdistancebetweensuchClassAstoragesshallbenotlessthan12mandthefireseparationdistance

betweensuchClassAstorageandhigh-risestorageshallbenotlessthan13m.

3.5.2Unlessotherwiserequiredbyprovisionsofthiscode，thefireseparationdistancebetween

anytwoClassB，C，D，Estorages，andbetweenanyClassB，C，D，Estoragesandanycivilbuildings

shallbenotlessthanthosespecifiedinTable3.5.2.

Table3.5.2Fireseparationdistance（m）betweenClassB，C，DandEstorages，Class

B，C，DandEstoragesandcivilbuildings（m）

ClassBstorageClassCstorageClassDandEstorage

Single-/multi-High-

High-riseSingle-/multi-storeySingle-/multi-storeyHigh-rise

storeyrise

Name

ClassⅠClassⅠClassⅠClassClassClassⅠClassClassClassClassⅠ

ClassⅢ

andⅡandⅡandⅡⅢⅣandⅡⅠ，ⅡⅢⅣandⅡ

ClassⅠ

1012131012141310121413

andⅡ

ClassB，C，Single-/

DandEClassⅢ1214151214161512141615

multi-

storage

storey

ClassⅣ1416171416181714161817

·19·Table3.5.2（continued）

ClassBstorageClassCstorageClassDandEstorage

Single-/multi-High-

High-riseSingle-/multi-storeySingle-/multi-storeyHigh-rise

storeyrise

Name

ClassⅠClassⅠClassⅠClassClassClassⅠClassClassClassClassⅠ

ClassⅢ

andⅡandⅡandⅡⅢⅣandⅡⅠ，ⅡⅢⅣandⅡ

ClassB，C，

ClassⅠ

High-

DandE

1315131315171313151713

andⅡ

rise

storage

PodiumClassⅠ

1012141310121413

and

andⅡ

single-/

25

ClassⅢ1214161512141615

Civilmulti-

buildingstorey

ClassⅣ1416181714161817

ClassⅠ2025252015181815

High-

50

rise

ClassⅡ1520201513151513

Notes：1Fireseparationdistancebetweensingle-/multi-storeyClassEstoragesmaybereducedby2mbasedonthosespecifiedin

thistable.

2Wheretheadjacentexternalwallsoftwostoragesarebothfirewalls，thefireseparationdistancemaybereduced，butit

shallbenotlessthan6mforClassCstorages，and4mforClassDandEstorages.Wheretheadjacenthigherexterior

wallsoftwostoragesarefirewalls，orwheretheexternalwallonanysideoftwoadjacentClassⅠⅠ，ⅡⅡbuildingswiththe

sameheightisafirewallandthefire-resistanceratingoftheroofisnotlessthan1.00h，andwherethetotalfirstfloor

areaisnotgreaterthanthemaximumpermissiblefirstfloorareaofastoragerequiredinSection3.3.2ofthiscode，the

fireseparationdistanceisnotlimited.

3ThefireseparationdistancefromClassBstorages（exceptthoseforClassBItem6articles）tocivilbuildingsshould

notbelessthan25m，andshallbenotlessthan50mtoimportantpublicbuildings.Thefireseparationdistanceto

railway，roadetc.shouldnotbelessthanthosebetweenClassAstoragesandrailway，roadetc.asspecifiedinTable

3.5.1.

3.5.3Wherethefire-resistanceclassofClassDandEstoragesandcivilbuildingsareClassⅠorⅡ，

thefireseparationdistancebetweenstoragesandcivilbuildingsmaybereduced，butshallcomplywith

thefollowingrequirements：

1Thefireseparationdistanceisnotlimited，providedthatthehigherexteriorwallisafirewall

withoutdoor，windoworotheropenings，ortheexteriorwallwithin15mhigherthantheroofofthe

adjacentlowerbuildingandthepartoftheexteriorwallbelowisafirewallwithoutdoor，windowor

otheropenings；

2Thefireseparationdistancemaybereducedbutshallbenotlessthan4m，providedthatthe

adjacentlowerexteriorwallisafirewall，theroofhasnoskylightoropeningandthefire-resistance

ratingoftheroofisnotlessthan1.00h，ortheadjacenthigherexteriorwallisafirewallandtheopening

inthewallisproperlyfireprotected.

3.5.4Fireseparationdistancebetweenanygrainsilosandotherbuildings，betweenanytwograinsilo

groupsshallbenotlessthanthosespecifiedinTable3.5.4.

·20·Table3.5.4Fireseparationdistancebetweenanygrainsilosandotherbuildings

andbetweenanytwograinsilogroups（m）

GrainsiloGrainsquatsiloOtherbuilding

Totalstored

Namequantityofgrains

W≤40000＜

W＞50000W≤50000W＞50000ClassⅠ，ⅡClassⅢClassⅣ

W（t）

40000W≤50000

500＜W≤10000101520

15

10000＜W≤

1520

25

40000

20252025

Grainsilo

40000＜W≤

20202530

50000

W＞50000252530

-

W≤5000020202520252025

-

Grain

squatsilo

W＞50000252530

-

Notes：1Wheregrainsilo，grainsquatsilo，operationtower，receivingtoweranddistributionstationareanintegralprocessunit，thefire

separationdistancebetweenbuildingswithintheunitdoesn'tneedtofollowthosespecifiedinthistable.

2Thestoredquantityofeachindependentsilointhegrainsquatsiloclustershallbenotgreaterthan10000t.

3.5.5Thedistancebetweentheboundingwallofthestorageareaandthebuildingsinthestoragearea

shouldnotbelessthan5m.Thedistancebetweentwobuildingsoneachsideofaboundingwallshall

complywiththefireseparationdistancerequirementsforcorrespondingbuildings.

3.6Explosionpreventionoffactorybuildingsandstorages

3.6.1ClassAandClassBfactorybuildingswithexplosionhazardshouldbebuiltindependently，and

shouldbeunenclosedorpartiallyenclosed.Theload-bearingstructureshouldbereinforcedconcrete，

steelorbentframestructure.

3.6.2Pressurereliefshallbeprovidedforfactorybuildingswithexplosionhazardoranypart

withexplosionhazardinafactorybuilding.

3.6.3Theareasforpressurereliefshouldbedoors，windows，light-weightedroofslabsorwalls.

Materialsthatmaybreakintosharpfragmentsinexplosionshallnotbeused.

Theareasforpressurereliefshallbeawayfromassemblyplacesormainroads，andshouldbe

closetospaceswithexplosionhazard.

Thedensityoflight-weightedroofslabsorwallsusedastheareaofpressurereliefshouldbeless

2

than60kg/m.

Measuresshallbetakenfortheareaofpressurereliefontherooftoavoidiceandsnow

accumulation.

3.6.4Pressurereliefareaintheroofsorwallsoffactorybuildingsshouldbecalculatedaccordingtothe

followingequation.However，wherethelength-diameterratioofafactorybuildingisgreaterthan3，the

buildingshouldbedividedintoseveralcalculatedsectionwiththelength-diameterrationotgreaterthan

3.Thecross-sectionbetweentwocalculatedsectionshallnotbeusedasthepressurereliefarea：

2

3（3.6.4）

A=10CV

2

where，A—Pressurereliefarea（m）；

3

V—Volumeofthecalculatedsectioninthefactorybuilding（m）；

23

C—Pressurereliefratio，giveninTable3.6.4（m/m）.

·21·Table3.6.4Classificationofsubstanceswithexplosionhazardinfactorybuildings

23

andtheminimumpressurereliefratio（m/m）

ClassificationofsubstanceswithexplosionhazardinfactorybuildingsC

-1

Ammonia，grain，paper，leather，lead，chromiumandcopperetc.withK＜10MPa·m·s≥0.030

dust

-1-1

Woodchip，carbondust，pulverizedcoal，stibiumandtinetc.with10MPa·m·s≤K≤30MPa·m·s≥0.055

dust

Acetone，gasoline，methanol，LPG，methane，paintsprayordryingroom，phenolresin，aluminium，

≥0.110

-1

magnesiumandzirconiumetc.withK＞30MPa·m·s

dust

Ethylene≥0.160

Acetylene≥0.200

Hydrogen≥0.250

Notes：1Thelength-diameterratio=longestdimensionofthebuildingplane×theperimeterofitscross-section÷（4.0×thecalculated

cross-sectionareaofthebuilding）.

2K，thedustexplosionindex.

dust

3.6.5WhereairinsidetheClassAfactorybuildingscontainscombustiblegasorvapor，whosedensity

islessthanthatofair，thelight-weightedroofslabshouldberegardedastheareaforpressurerelief；the

ceilingshallbeflatandsmoothwithoutdeadcorner；theupperspaceofthefactorybuildingsshallbe

wellventilated.

3.6.6TheClassAfactorybuildingswithairinsidecontainingcombustiblegasorvapor，whose

densityismorethanthatofair，andClassBfactorybuildingswithexplosionhazardofdustand

fibershallcomplywiththefollowingrequirements：

1Spark-freefloorshallbeprovided.Whereinsulatingmaterialsareusedasmonolithicfloor

surface，electrostaticprotectionmeasuresshallbetaken.

2Wherethefactorybuildingsgeneratecombustibledustorfiber，theinteriorsurfaceshall

beflat，smoothandeasyforcleaning.

3Trenchshouldnotbeprovidedinthefactorybuildings.Iftrenchmustbeprovided，its

covershallbetightandeffectivemeasuresshallbetakentopreventcombustiblegas，vapor，dust，

fiberfromaccumulatinginthetrench.Inaddition，firestoppingshallbeusedtosealthe

connectionbetweentrenchandadjacentfactorybuildings.

3.6.7ClassAandBproductionpartswithexplosionhazardshouldbearrangedclosetotheareafor

pressurereliefintheexteriorwallforsingle-storeyfactorybuildingsorintheexteriorwallofthetop

storeyformulti-storeyfactorybuildings.

Theequipmentwithexplosionhazardshouldbeinstalledawayfromtheprimaryload-bearing

elementsoffactorybuildings，suchasbeamsandcolumnsetc.

3.6.8ThecentralcontrolroomofClassAandBfactorybuildingswithexplosionhazardshallbe

builtindependentlyoutsidethefactorybuildings.

3.6.9Thesub-controlroomsofClassAandBfactorybuildingswithexplosionhazardshouldbebuilt

independentlyoutsidethefactorybuildings.Ifsuchroomsareadjoiningtotheexteriorwallsofthe

factorybuildings，firepartitionwallswithfire-resistanceratingnotlessthan3.00hshallbeusedto

separatesuchroomsfromotherportionsofthebuilding.

·22·3.6.10Protectivemeasures，likeavestibule，shallbetakenforstaircases，outdoorstairwaysinareas

withexplosionhazardorconnectingpartbetweenareaswithexplosionhazardandadjoiningareas.The

partitionwallsofthevestibuleshallbefireratedandthefire-resistanceratingshallbenotlessthan

2.00h；doorsofthevestibuleshallbeClassAfiredoorsandshallnotbeplacedattherightoppositeof

thedoorleadingtothestaircase.

3.6.11ForfactorybuildingsusingandgeneratingClassA，BandCliquids，thepipesand

trenchesshallnotbeconnectedwiththoseofadjacentfactorybuildings.Greasetrapsand

separatorsshallbeprovidedforthesewers.

3.6.12ThestoragesforClassA，BandCliquidsshallbeprovidedwithfacilitiestopreventliquid

fromdispersion.Storagescontainingmaterialswithcombustionorexplosionhazardinhumid

environmentshallbeprotectedwithwaterproofmeasures.

3.6.13Thecovershallbeprovidedwithproperpressurerelieffacilitiesforsiloswithdustexplosion

hazard.

Pressurereliefareaoftheoperationtowerandupperconnectingcorridoringrainsiloshallbe

calculatedaccordingtoArticle3.6.4ofthiscode.Explosionpreventionmeasuresshallbetakenfor

othergrainstorageswithdustexplosionhazard.

3.6.14Storagesorportionsthereofwithexplosionhazard，explosionpreventionmeasuresshouldbe

takenandpressurerelieffacilitiesshallbeprovidedaccordingtotherequirementsofthissection.

3.7Evacuationoffactorybuildings

3.7.1Exitsoffactorybuildingsshallbeseparatedfromeachother.Foreachfirecompartmentoreach

floorinafirecompartment，thedistancebetweenanytwoadjacentexitsshallbenotlessthan5m.

3.7.2Foreachfirecompartmentinfactorybuildingsoreachfloorinafirecompartment，the

numberofexitsshallbedeterminedbycalculationandshallbenotlessthan2；incasethefollowing

conditionsaremet，1exitispermitted：

2

1ForClassAfactorybuilding，thegrossfloorareaofeachfloorisnotgreaterthan100m

andtheoccupantloadatthesametimeisnotmorethan5；

2

2ForClassBfactorybuilding，thegrossfloorareaofeachfloorisnotgreaterthan150m

andtheoccupantloadatthesametimeisnotmorethan10；

2

3ForClassCfactorybuilding，thegrossfloorareaofeachfloorisnotgreaterthan250m

andtheoccupantloadatthesametimeisnotmorethan20；

4ForClassDandEfactorybuilding，thegrossfloorareaofeachfloorisnotgreaterthan

2

400mandtheoccupantloadatthesametimeisnotmorethan30；

5Forundergroundorsemi-undergroundfactorybuildings（includingbasementandsemi-

2

basement），thegrossfloorareaofeachfloorisnotgreaterthan50mandtheoccupantloadatthe

sametimeisnotmorethan15.

3.7.3Forundergroundorsemi-undergroundfactorybuildings（includingbasementandsemi-

basement），theClassAfiredoorinafirewallofthefirecompartmentthatleadstotheadjoining

firecompartmentmaybeusedasthesecondexit，butatleastoneindependentexitdirectlyleading

totheoutdoorsmustbeprovidedforeachfirecompartment.

3.7.4Thedistancefromanypointtothenearestexitinthefactorybuildingsshallbenotgreaterthan

thosespecifiedinTable3.7.4.

·23·Table3.7.4Distancefromanypointtothenearestexitinthefactorybuildings（m）

Undergroundorsemi-undergroundfactory

Firehazard

Fire-resistanceSingle-storeyMulti-storeyHigh-rise

classification

building（includingbasementandsemi-

classfactorybuildingfactorybuildingfactorybuilding

ofproduction

basement）

AClassⅠandⅡ3025--

BClassⅠandⅡ755030-

ClassⅠandⅡ806030

C40

ClassⅢ6040-

ClassⅠandⅡNotlimitedNotlimited5045

DClassⅢ6050--

ClassⅣ50---

ClassⅠandⅡNotlimitedNotlimited7560

EClassⅢ10075--

ClassⅣ60---

3.7.5Thetotalclearwidthofexitstairway，passagewayanddoorinthefactorybuildingsshallbe

determinedbycalculationbasedontheminimumclearwidthforevacuationper100personsnotless

thanthosespecifiedinTable3.7.5.However，theminimumclearwidthofexitstairway，passageway

anddoorshouldnotbelessthan1.10m，1.40mand0.90m，respectively.Iftheoccupantloadsarenot

equaloneachfloor，thetotalclearwidthofexitstairwayshallbedeterminedbycalculationfloorby

floor.Thetotalclearwidthofstairwaysonanyfloorshallbedeterminedbycalculationaccordingto

maximumoccupantloadsofthisfloorandthefloorsabove.

Table3.7.5Minimumclearwidthforevacuationper100personsofexitstairway，

passagewayanddoorinthefactorybuildings

Numberofstoreysinfactorybuilding（storey）1-23≥4

Minimumclearwidthforevacuation（m/100persons）0.600.801.00

Thetotalclearwidthoftheexteriordooronthefirstfloorshallbedeterminedbycalculation

accordingtotheoccupantloadsonthisfloorandthefloorsabove.Theminimumclearwidthofthedoor

shallbenotlessthan1.20m.

3.7.6Forhigh-risefactorybuildingandClassA，BandCmulti-storeyfactorybuildings，theexit

stairwayshallbeenclosedstairwayoroutdoorstairway.Forfactorybuildingshigherthan32m

andtheoperatorsoneachfloorexceeding10，theexitstairwayshallbesmokeproofstaircaseor

outdoorstairway.

3.8Evacuationofstorages

3.8.1Exitsofstoragesshallbeseparatedfromeachother.Foreachfirecompartmentoreachfloorina

firecompartment，thedistancebetweentwoadjacentexitsshallbenotlessthan5m.

3.8.2Thenumberofexitsforeachstorageshallbenotlessthan2；1exitispermittedprovided

2

thatthefirstfloorareaofastorageisnotgreaterthan300m.Atleast2exitsshouldbeprovided

foreachfirecompartmentinstoragetoleadtoexitpassageway，stairwayortheoutdoors.1exitis

2

permittedprovidedthatthefloorareaofafirecompartmentisnotgreaterthan100m.Thedoor

·24·leadingtotheexitpassagewayorstairwayshallbeClassBfiredoor.

3.8.3Thenumberofexitsofundergroundorsemi-undergroundstorages（includingbasement

andsemi-basement）shallbenotlessthan2；oneexitispermittedprovidedthatthefloorareaisnot

2

greaterthan100m.

Forundergroundorsemi-undergroundstorages（includingbasementandsemi-basement），

theClassAfiredoorinafirewallofthefirecompartmentthatleadstotheadjoiningfire

compartmentmaybeusedasthesecondexit，butatleastoneindependentexitdirectlyleadingto

theoutdoorsmustbeprovidedforeachfirecompartment.

3.8.4Theevacuationarrangementofcoldstore，grainsiloandbankvaultshallcomplywiththe

requirementsofthecurrentnationalstandardsGB50072CodeforDesignofColdStoreandGB50322

CodeforDesignofGrainSteelSilosrespectively.

2

3.8.5Wheretheareaoftheworkingareaatthetopofthegrainsiloislessthan1000mandthe

numberofoperatorsisnotmorethan2，1exitispermitted.

3.8.6TheoutdoormetalstairwayinstorageandsilomeetingtherequirementsofArticle6.4.5ofthis

codemaybepermittedtobetheexitstairway，providedthatthefire-resistanceratingoftheoutdoor

stairwaylandingofthesiloshallbenotlessthan0.25h.

3.8.7Theexitstairwayofhigh-risestorageshallbeenclosedstairway.

3.8.8Verticalliftingfacilityshouldbeinstalledoutsideforstoragesotherthanmulti-storeyClassE

storageswithClassⅠorClassⅡfire-resistanceclass.Ifitmustbeinstalledinside，itshallbeplacedin

ashaftwiththefire-resistanceratingoftheshaftwallnotlessthan2.00h.Thedoortotheindooror

outdoorliftingfacilityleadingtothestorageshallbeClassBfiredoororfireshuttercomplyingwiththe

requirementsofArticle6.5.3.

·25·4ClassA，B，Cliquidandgastanks（tankfarm）and

stackyardforcombustibles

4.1Generalrequirements

4.1.1ClassA，BandCliquidtankfarm，LPGtankfarm，combustibleandcombustion-supportinggas

tankfarmandstackyardforcombustibles，shallbelocatedattheedgeoftheurban（zone）orinthe

relativelyindependentandsafezone，andshouldbelocatedinthedownwinddirectionwiththeannual

minimumfrequency.

ClassA，BandCliquidtanks（tankfarm）shouldbelocatedinplaceswithlowerterrain，otherwise

fireprotectionmeasuresshallbetaken.

LPGtank（tankfarm）shouldbelocatedinflatoropenplaceswhereLPGisnoteasily

accumulated.

4.1.2ClassAliquidinbarrelsorcylindersshallnotbestoredoutdoors.

4.1.3Noncombustiblesolidwallwiththeheightnotlessthan1.0mshallbeprovidedaroundthe

LPGtankgroupsortankfarms.

4.1.4ClassA，BandCliquidtankfarm，LPGtankfarm，combustibleandcombustion-supportinggas

tankfarmandstackyardforcombustiblesshallbearrangedawayfromtheloadingandunloadingarea，

accessoryproductionareaandofficearea.

4.1.5TheminimumdistancebetweenClassA，B，Cliquidtanks，LPGtanks，combustibleor

combustion-supportinggastanks，combustiblesstacksandoverheadpowerlinesshallcomplywiththe

requirementsofArticle10.2.1ofthiscode.

4.2FireseparationdistanceofClassA，B，Cliquidtanks（tankfarm）

4.2.1FireseparationdistancebetweenClassA，B，Cliquidtanks（tankfarm），stacksofClassB，C

liquidbarrelsandotherbuildingsshallbenotlessthanthosespecifiedinTable4.2.1.

Table4.2.1FireseparationdistancebetweenClassA，B，Cliquidtanks（tankfarm），stacksofClassB，

Cliquidbarrelsandotherbuildings（m）

Buildings

Outdoor

ClassⅠandⅡ

Totalvolumeofatank

transformerand

Classfarmorstacksofbarrels

Podium，

distribution

ClassⅢClassⅣ

High-rise

3

V（m）

other

substation

civilbuilding

building

1≤V＜504012152030

ClassAandB

50≤V＜2005015202535

liquidtanks（tank

200≤V＜10006020253040

farms）

1000≤V＜50007025304050

5≤V＜2504012152024

ClassCliquidtank250≤V＜10005015202528

（tankfarm）1000≤V＜50006020253032

5000≤V＜250007025304040

·26·Notes：1WhereClassA，B，Cliquidtanksarearrangedinthesametankfarm，thetotalvolumeofthetankfarmmaybeconverted

33

accordingtothefollowings：1mClassAandBliquidsisequivalentto5mClassCliquid.

2Thedistancebetweentheouteredgeofthefiredikeofthestoragetankandtheadjacentbuildingshallbenotlessthan10m.

3FireseparationdistancefromClassA，B，Cliquidfixedrooftankfarmorsemi-openstackyard，stacksofClassBandC

liquidbarrelstoClassAfactorybuildings（storages）andcivilbuildingsshallbeincreasedby25%%ofthosespecifiedin

thistable.However，thefireseparationdistancefromClassA，Bliquidfixedrooftankfarmsorsemi-openstackyard，

stacksofClassBandCliquidbarrelstoClassAfactorybuildings（storage），podium，singleormulti-storeycivil

buildingsshallbenotlessthan25m，andthedistancetotheopenflameorsparkingsiteshallbeincreasedby25%%ofthose

forClassⅣⅣbuildingspecifiedinthistable.

4Fireseparationdistancebetweenfloatingrooftankfarmortankfarmwithliquid''sflashpointover120℃andother

buildingsmaybereducedby25%%ofthosespecifiedinthistable.

5Incaseseveraltankfarmsarearrangedonthesamelot，thefireseparationdistancebetweentankfarmsshallbenotless

thanthegreatervalueofthefireseparationdistancespecifiedinthistablefortankfarmwithdifferentvolumesand

ClassⅣbuildings.

3

6FordirectlyburiedClassA，BandCliquidhorizontaltanks，wherethevolumeofasingletankisnotgreaterthan50m

3

andthetotalvolumeisnotgreaterthan200m，thefireseparationdistancebetweenthehorizontaltanksandthe

buildingsmaybereducedby50%%ofthosespecifiedinthistable.

7Outdoortransformeranddistributionsubstationarethosewiththevoltageof35kV-500kVandthecapacityofeach

transformernotlessthan10MV·A，oroutdoorstepdownsubstationsforindustrialusewiththetotaloilamountgreater

than5t.

4.2.2FireseparationdistancebetweenanytwoClassA，B，Cliquidtanksshallbenotlessthan

thosespecifiedinTable4.2.2.

Table4.2.2FireseparationdistancebetweenanytwoClassA，B，Cliquidtanks（m）

Fixedrooftank

Floatingrooftankorstorage

Horizontal

Classificationtankwithnitrogen-filling

Semi-

AbovegroundUndergroundtank

undergroundprotectionequipment

V≤10000.75D

ClassAand

0.5D0.4D0.4D

Volume

Bliquidtank

V＞10000.6D

ofsingle

≥0.8m

tank

ClassC

3

V（m）Unlimited0.4DUnlimitedUnlimited--

liquidtank

Notes：1Disthediameter（m）ofthelargeradjacentverticalstoragetank.Thediameteroftherectangularstoragetankishalfof

thesumofthelong-sideandshort-sideoftherectangular.

2Fireseparationdistancebetweenanytwotankswithdifferentliquidsanddifferenttanktypesshallbenotlessthanthe

greatervaluespecifiedinthistable.

3Fireseparationdistancebetweenanytworowsofhorizontaltanksshallbenotlessthan3m.

3

4Wherethevolumeofsingletankisnotgreaterthan1000mandfixedcoolingsystemisprovided，thefireseparation

distancebetweenabovegroundfixedrooftanksofClassAandBliquidsshallbenotlessthan0.6D.

5Whereabovegroundstoragetankisprovidedwithsubsurfaceinjectionfoamextinguishingsystem，fixedcoolingwater

systemandfoamfireextinguishingfacilitiesusedforputtingoutliquidfireinthefiredike，thefireseparationdistance

betweenanytwostoragetanksmaybereduced，butshouldnotbelessthan0.4D.

6Forthecombustibleliquidwiththeflashpointgreaterthan120℃，wherethevolumeofasingletankisgreaterthan

3

1000m，thefireseparationdistancebetweenanytwostoragetanksshallbenotlessthan5m；wherethevolumeofa

3

singletankisnotgreaterthan1000m，thefireseparationdistanceshallbenotlessthan2m.

4.2.3WhereClassA，BandCliquidtanksarearrangedbygroup，thefollowingrequirements

shallbemet：

·27·1Thevolumeofasingletankandthetotalvolumeofthetankgroupshallbenotgreater

thanthosespecifiedinTable4.2.3.

3

Table4.2.3MaximumvolumeofClassA，BandCliquidtanksarrangedbygroup（m）

ClassMaximumvolumeofasingletankMaximumvolumeofatankgroup

1000

ClassAandBliquid200

ClassCliquid5003000

2Thestoragetanksinagroupshallnotbearrangedinmorethantworows.Thefire

separationdistancebetweenverticaltanksforClassAandBliquidsshallbenotlessthan2m，and

thatbetweenhorizontaltanksforClassAandBliquidsshallbenotlessthan0.8m.Thefire

separationdistancebetweenClassCliquidtanksisnotlimited.

3Fireseparationdistancebetweenstoragetankgroupsshallbedeterminedaccordingtothe

requirementsofArticle4.2.2ofthiscodebyfirstlyconvertingthestoragetanksinthegroupbased

onthetypeandtotalvolumeintostandardsingletankofthesameclass.

4.2.4Fortheabovegroundandsemi-undergroundtankfarmsofClassA，BandCliquids，thestorage

tankswiththesameorsimilarfirehazardshouldbearrangedwithinafiredike.Storagetankforboil-

overoilandthatfornon-oil-overoilshallnotbearrangedinthesamefiredike.Abovegroundandsemi-

undergroundstoragetanksshallnotbearrangedinthesamefiredikewiththeundergroundstoragetank.

4.2.5Noncombustiblefiredikeshallbearrangedaroundtheabovegroundandsemi-underground

storagetanksorstoragetankgroupforClassA，BandCliquids.Thearrangementoffiredikeshall

complywiththefollowingrequirements：

1Thestoragetanksinthesamefiredikeshouldnotbearrangedinmorethan2rows.The

3

volumeofasingletanknotgreaterthan1000mandtheliquidtankswiththeflashpointgreaterthan

120℃shouldnotbearrangedinmorethan4rows.

2Theeffectivecapacityofafiredikeshallbenotlessthanthevolumeofthemaximumstorage

tanktherein.Forfloatingrooftank，theeffectivecapacityofafiredikemaybehalfofthevolumeofthe

tankwithmaximumvolume.

3Thehorizontaldistancefromtheinneredgeofthefirediketotheouterwallofthevertical

tankshallbenotlessthanhalfoftheheightofthetankwall.Thehorizontaldistancefromthe

inneredgeofthefirediketothehorizontaltankshallbenotlessthan3m.

4Thedesignedheightofthefiredikeshallbe0.2mhigherthanthecalculatedheight，and

theheightshallbe1.0m--2.2m；thefootboardconvenientforthefire-fightingandrescuestaffgoing

inandoutofthefiredikeshallbeprovidedatreasonablelocation.

5Fortheabovegroundandsemi-undergroundstoragetanksusedforboil-overoil，every

storagetankshallbeprovidedwithafiredikeorfireseparationdike.

6Oilysewershallbeprovidedwithwatersealfacilitiesattheexitofthefiredike；rain

drainagepipesshallbeprovidedwithsealingandisolationdevicessuchasvalves.

4.2.6Forthesemi-openstackyardforClassAliquid，stackyardforbarreledClassBandCliquidsand

liquidtanks（tankfarm）withflashpointgreaterthan120℃，firedikesmaynotberequiredwhen

measurestopreventliquidfromflowinghavebeentaken.

4.2.7FireseparationdistancefromClassA，BandCliquidtankstothepumproomandliquidloading

andunloadingarmsshallbenotlessthanthosespecifiedinTable4.2.7.

·28·Table4.2.7FireseparationdistancefromClassA，BandCliquidtanksandthe

pumproomandliquidloadingandunloadingarms（m）

LiquidclassificationandstoragetanktypePumproomRailwayorautomobileloadingandunloadingarms

Domerooftank1520

ClassAandBliquidtank

Floatingrooftank1215

ClassCliquidtank1012

3

Notes：1ForClassAandBliquidtankswithtotalvolumenotgreaterthan1000mandClassCliquidtankwithtotalvolumenotgreater

3

than5000m，thefireseparationdistancemaybereducedby25%ofthosespecifiedinthistable.

2Thedistancefrompumproomandliquidloadingandunloadingarmstotheouteredgeofthefiredikeofthestoragetankshall

benotlessthan5m.

4.2.8FireseparationdistancefromtheloadingandunloadingarmsofClassA，BandCliquidstothe

buildingorthein-factoryrailwaytrackshallbenotlessthanthosespecifiedinTable4.2.8.

Table4.2.8FireseparationdistancefromtheloadingandunloadingarmsofClassA，

BandCliquidstobuildingorin-factoryrailwaytrack（m）

Building

In-factoryrailway

NamePumproom

track

ClassⅠandⅡClassⅢClassⅣ

Loadingandunloadingarmsof

14161820

ClassAandBliquid

8

Loadingandunloadingarmsof

10121410

ClassCliquid

Note：FireseparationdistancefromtheloadingandunloadingarmstoClassA，BandCliquidloadingandunloadingrailwayusedfor

directlyloadingandunloadingisnotlimited.

4.2.9FireseparationdistancebetweenClassA，BandCliquidtanksandrailway/roadshallbenot

lessthanthosespecifiedinTable4.2.9.

Table4.2.9FireseparationdistancebetweenClassA，BandCliquidtanksandrailway/road（m）

In-factoryroadside

Centerlineof

Centerlineofoff-factory

Name

Off-factoryroadside

railwayin-factoryrailway

MainSecondary

ClassAandBliquidtanks3525201510

ClassCliquidtank302015105

4.2.10Thedistancebetweensurgetankandtheloadingandunloadingrailwaylineshallbenotlessthan6m.

4.2.11Fireseparationdistancebetweenthetanks（tankfarm）oftheoildepotandthebuilding，the

arrangementoftanks，fireseparationdistancebetweenthestoragetanksintheoildepot，fireseparation

distancebetweenstoragetankandsuchbuildingsaspumproomandliquidloadingandunloadingarms

intheoildepotetc.，shallcomplywiththerequirementsofthecurrentnationalstandardGB50074Code

forDesignofOilDepot.

4.3Fireseparationdistanceofcombustibleandcombustion-

supportinggastanks（tankfarm）

4.3.1Fireseparationdistancebetweencombustiblegastankandthebuilding，storagetank，and

stackyardshallcomplywiththefollowingrequirements：

·29·1Fireseparationdistancebetweenwetcombustiblegastankandbuilding，storagetank，

stackyardshallbenotlessthanthosespecifiedinTable4.3.1.

Table4.3.1Fireseparationdistancebetweenwetcombustiblegastankandbuilding/storagetank/stackyard（m）

3

Wetcombustiblegastank（totalvolumeV，m）

Name

1000≤10000≤50000≤100000≤

V＜1000

V＜10000V＜50000V＜100000V＜300000

ClassAstorageClassA，BandCliquidtanks

stackyardforcombustiblesoutdoortransformerand2025303540

distributionsubstationopenflameorsparkingsite

2530354045

High-risecivilbuildings

1820253035

Podium；single-，multi-storeycivilbuildings

ClassⅠandⅡ1215202530

Other

ClassⅢ1520253035

buildings

ClassⅣ2025303540

Note：Thetotalvolumeofcombustiblegastankwithconstantvolumeshallbecalculatedaccordingtotheproductofthegeometrical

35

volumeofthestoragetank（m）andthedesignedstoragepressure（absolutepressure，10Pa）.

2Fireseparationdistancebetweenthecombustiblegastankwithconstantvolumeandthe

building，storagetankandstackyardshallbenotlessthanthosespecifiedinTable4.3.1.

3Fireseparationdistancebetweendrycombustiblegastankandbuilding，storagetank，and

stackyard：wherethedensityofthecombustiblegasisgreaterthanthatoftheair，thedistanceshall

beincreasedby25%%ofthosespecifiedinTable4.3.1；wherethedensityofcombustiblegasissmaller

thanthatoftheair，thedistanceshallbedeterminedaccordingtothosespecifiedinTable4.3.1.

4Fireseparationdistancefromsuchauxiliaryfacilitiesaswatersealedwell，oilpumproom

andelevatorroomofwetordrycombustiblegastanktothestoragetankmaybearranged

accordingtotheprocessrequirements.

5Fireseparationdistancebetweenthecombustiblegastankwithvolumenotgreaterthan

3

20mandthefactorybuildingusingthetankisnotlimited.

4.3.2Fireseparationdistancebetweenthecombustiblegastanks（tankfarms）shallcomplywith

thefollowingrequirements：

1Fireseparationdistancebetweenwetcombustiblegastanksorbetweendrycombustible

gastanksorbetweenwetcombustiblegastankanddrycombustiblegastankshallbenotlessthan

1/2ofthediameterofthelargeradjacenttank.

2Fireseparationdistancebetweencombustiblegastankswithconstantvolumeshallbenot

lessthan2/3ofthediameterofthelargeradjacenttank.

3Fireseparationdistancefromcombustiblegastankwithconstantvolumetothewetordry

combustiblegastankshallbenotlessthan1/2ofthediameterofthelargeradjacenttank.

4Wherethetotalvolumeofseveralcombustiblegastankswithconstantvolumeisgreater

3

than200000m，theyshallbearrangedbygroup.Fireseparationdistancebetweenhorizontaltank

groupsshallbenotlessthanhalfofthelengthofthelargeradjacenttank；fireseparationdistance

betweensphericaltankgroupsshallbenotlessthanthediameterofthelargeradjacenttank，and

shallbenotlessthan20m.

·30·4.3.3Fireseparationdistancebetweentheoxygentankandthebuilding，storagetankand

stackyardshallcomplywiththefollowingrequirements：

1Fireseparationdistancebetweenthewetoxygentankandthebuilding，storagetankand

stackyardshallbenotlessthanthosespecifiedinTable4.3.3.

Table4.3.3Fireseparationdistancebetweenthewetoxygentankandbuilding/storagetank/stackyard（m）

3

Wetoxygentank（totalvolumeV，m）

Name

V≤10001000＜V≤50000V＞50000

Openflameorsparkingsite253035

ClassA，B，Cliquidtanks，combustiblesstackyards，ClassA

202530

storage，outdoortransformeranddistributionsubstations

Civilbuildings182025

ClassⅠandⅡ101214

OtherbuildingsClassⅢ121416

ClassⅣ141618

Note：Thetotalvolumeofoxygentankwithconstantvolumeshallbecalculatedaccordingtotheproductofthegeometricalvolume

35

ofthestoragetank（m

）andthedesignedstoragepressure（absolutepressure，10Pa）.

2Fireseparationdistancebetweentheoxygentanksshallbenotlessthan1/2ofthe

diameterofthelargeradjacenttank.

3Fireseparationdistancebetweentheoxygentankandthecombustiblegastankshallbe

notlessthanthediameterofthelargeradjacenttank.

4Fireseparationdistancefromtheoxygentankwithconstantvolumetothebuilding，tank

andstackyardshallbenotlessthanthosespecifiedinTable4.3.3.

5Fireseparationdistancebetweentheoxygentankandoxygenstationmaybedetermined

accordingtotherequirementsoftheprocesslayout.

3

6Fireseparationdistancebetweentheoxygentankwithvolumenotgreaterthan50mand

thefactorybuildingusingthetankisnotlimited.

33

Note：1mliquidoxygenisconvertedinto800mgaseousoxygenunderstandardcondition.

4.3.4Fireseparationdistancebetweentheliquidoxygentankandthebuilding，storagetankand

stackyardshallcomplywiththerequirementsforthefireseparationdistanceofwetoxygentankswith

thecorrespondingvolumeinArticle4.3.3ofthiscode.Thedistancebetweentheliquidoxygentankand

itspumproomshouldnotbelessthan3m.Thefireseparationdistancefromtheliquidoxygentankwith

3

totalvolumenotmorethan3mtothebuildingusingthetanksshallcomplywiththefollowing

requirements：

1WhenlocatedinthededicatedClassⅠorClassⅡbuildings，thefireseparationdistanceshall

benotlessthan10m.

2WhenlocatedinthededicatedClassⅠorClassⅡbuilding，andthesidefacingtothebuilding

isfirewallwithoutdoor，windoworotheropenings，thefireseparationdistanceisnotlimited.

3Whenmeasureshavebeentakentoprotectthelowtemperatureliquidoxygentank，thefire

separationdistanceshallbenotlessthan5m.

Theliquidoxygentankatthegassupplystationinthemedicalorganizationsshallcomplywiththe

followingrequirements：

·31·3

1Thevolumeofasingletankshallben