StorageofflammableliquidsintanksPage1of69HealthandSafetyExecutiveStorageofflammableliquidsintanksHSEBooksThisguidanceappliestoaboveandbelowgroundfixedbulkstoragetanks.Itappliestopremiseswhereflammableliquidsarestoredinindividualtanksorgroupsoftanks.Itmayalsobeappliedtoportableorskid-mountedvesselswithcapacitiesinexcessof1000litres.Italsogivesguidanceonthedesign,construction,operationandmaintenanceofinstallationusedforthestorageofflammableliquidsinfixedandtransportabletanksoperatingatornearatmosphericpressure.Itwillhelpyouassesstherisksarisingfromtheuseofflammableliquidsanddecidehowtocontrolthoserisks.Theguidanceisoneofthreedocumentsdealingwithfireandexplosionhazardsassociatedwithflammableliquids.Theothertwoare:■StorageofflammableliquidsincontainersHSG51;■SafeuseandhandlingofflammableliquidsHSG140.ItsupplementstheadvicecontainedinDangeroussubstancesandexplosiveatmospheres:DangerousSubstancesandExplosiveAtmospheresRegulations2002.ApprovedCodeofPracticeandguidanceL138.TheguidancehasbeenupdatedtoalignwiththerecommendationsoftheBuncefieldreport.HSG176(Secondedition)Published2015StorageofflammableliquidsintanksPage2of69HealthandSafetyExecutiveContentsIntroduction5Whattheguidancedoesnotapplyto7DangerousSubstancesandExplosiveAtmospheresRegulations2002(DSEAR)7Generalfiresafetylegislation8Hazards9Commoncausesofincidents9Flammablevapours10Healthhazards11Riskassessment12Substitution13Controlmeasures14Containment14Separation14Ventilation14Controlofignitionsources15Hazardousareaclassification15Controlsforoff-siterisks19Recovery19Locationandlayoutoftanks20Tanksaboveground20Separationdistancesfor‘small’tanks22Separationdistancesforgroupsof‘small’tanks22Separationdistancesfor‘large’tanks23Separationfromotherdangeroussubstances24Storageofflammableliquidsinbuildings25Undergroundtanks25Designandconstruction26Thedesignofthetank26Double-skinstoragetanks26Corrosionprotection28Corrosionunderinsulation28Installingthetank29Pipeworktoandfromthetank29Above-groundpipework30Undergroundpipework30Flexiblehoses30Tankconnectionsandfittings31Valves32Pumps32Contentsmeasurement33Tankgaugingsystems34Dipping34Vents34HealthandSafetyExecutiveStorageofflammableliquidsintanksPage3of69HealthandSafetyExecutiveEmergencyreliefventing35Bondingandearthing:Staticelectricity36Bunding36Markingtanksandfittings38Lighting38Testingtanksandpipework39Heatedtanks39Temperaturecontrol39Loadingandunloadingfacilities41Loadingandunloadingroadtankers41Designofaroadtankerloading/unloadingfacility41Railloading/offloading42Operationofroadandrailfacilities43Fireprotection44Passivefireprotection44Firewalls44Watercoolingsystems44Foamsystems45Inspectionandmaintenance46Floating-rooftanks46Permit-to-worksystems47Modifyingthestorageinstallation47Decommissioningtanks48Demolishingtanks48Fireprecautions49Generalfireprecautions49Emergencyprocedures52Security52Informationandtraining52Signage53Higherflashpointliquids55Sourcesofignition55Locationoftanksaboveground55Storageinbuildings56Venting56Markingandlabelling56Roadandrailtankers56AppendixOtherrelevanthealthandsafetylegislation57ManagementofHealthandSafetyatWorkRegulations1999(theManagementRegulations)57ControlofSubstancesHazardoustoHealthRegulations2002(COSHH)57CLPandCHIP57ProvisionandUseofWorkEquipmentRegulations1998(PUWER)58EquipmentandProtectiveSystemsIntendedforUseinPotentiallyExplosi...