Presentation on theme: "Future Hazard Analysis in EN ‘Occupancy and Storage Classification’"— Presentation transcript:
1 Future Hazard Analysis in EN 12845 ‘Occupancy and Storage Classification’ Stuart LloydPrincipal Fire Protection EngineerZurich Risk Engineering UK
2 Agenda EN 12845 status The past & current hazard analysis Moving forwardNon StorageStorageSpecial Hazards
3 Status Current EN 12845 issued in 2009 EN 12845:2004 +A2 included amendments A1 and A2Next EN to be published end 2014EN Revision 1 (EN 12845:2014)Future EN 12845EN Revision 2In developmentfocus of this presentation
4 Occupancy Classification Taken from BS 5306 part 2 1990 (UK) TYPE OF OCCUPANCYNon industrial where theamount and combustibility of the contents is lowCommercial and industrialProcessing and handlingmainly ordinary combustiblematerials unlikely to develop intensely burningfires in the initial stagesClassification - Ordinary Hazard Group I,II,IIIor IIIS (see table 3)For example, some areas of: HospitalsHotelsLibrariesMuseumsNursing homesOffice buildingsPrisonsSchools,Colleges, etcGoods storage - with abnormalfire loads likely to produceexceptionally intense fireswith a high rate of heatreleaseProcess hazards - extrahazardous, likely todevelop rapidly andintensely burning firesAtticsbasementsboiler roomskitchenslaundriesstorage spacesworkroomsCategory of goods type and height of storageClassification - Ordinary HazardGroup IIIClassification - High Hazardhigh piledstorageStorage methodsS1 to S8Type S9 orS10 potablespirit storesprocess hazardClassification – Light HazardMention that ‘some’ or ‘parts of premises’ are often ignoredJanuary 2008
5 Occupancy Classification (EN & CEA) Developed from text in standards (not illustrated) TYPE OF OCCUPANCYNon industrial (where theamount and combustibility of the contents is low)Commercial and industrialProcessing and handlingmainly ordinary combustiblematerials unlikely to develop intensely burningfires in the initial stagesClassification - Ordinary Hazard Group I,II,III,IVFor example, some areas of: HospitalsHotelsLibrariesMuseumsNursing homesPrisonsetcGoods storage - with abnormalfire loads likely to produceexceptionally intense fireswith a high rate of heatreleaseProcess hazards - extrahazardous, likely todevelop rapidly andintensely burning firesAtticsbasementsboiler roomskitchenslaundriesstorage spaces*workroomsCategory of goods type and height of storageClassification - Ordinary HazardGroup III, IVClassification - High Hazardhigh piledstorageStorage methodsST1 to ST6process hazardClassification – Light HazardMention that this is not illustrated in EN12845, perhaps an oversight?HHP 1,2,3,4*Storage may be High Hazard due to storage height/block size55
6 EN 12845 Revision 2 - Simplification of Hazard Classes Current (10 options)Light Hazard (LH)Ordinary Hazard (OH 1,2,3,4)High Hazard Process (HHP 1,2,3,4)High Hazard StorageFuture (5 options)Fire Hazard 1Fire Hazard 2Fire Hazard 3Fire Hazard 4
7 Future Density/Area for each FH Fire HazardOld designationDensity mm/minArea wet m²Area dry m²FH1LH/OH157290FH2OH2/OH3216270FH3OH4/HHP17,5260325FH4HHP2/HHP312,5The most widely used density/areas have been adopted going forward
9 Clearer Guidance Non-manufacturing example Educational FacilitiesUniversitiesSchoolsCollegesNurseriesPrisonsGymnasiumsConstruction made of concrete or steel, low combustible load, no carpets.FH1Construction other than concrete or steel, combustible load larger than defined as FH1, Typical technical rooms with hydraulic units less than 100 L, laundries with less than hydraulic units of 100 LFH2Storage Rooms.HHSSome aspects based on constructionAll aspects based on risk evaluationTables identify ‘typical risks’ associated with premise type
10 Clearer Guidance Manufacturing example Manufacturing occupancies and their associated Fire Hazard Class continued.OccupancyDescriptionSpecial ConsiderationFire HazardMechanical EngineeringOr Assembling Plant-Sheet metal product factories-Metal working-Electric and Electronicsequipment factories- White Appliances factories- Circuit board manufacturing- Car workshops- Fire-lighter manufactureWater-based emulsion for grinding, drilling, cutting, stamping processesFH2injection molding (plastics) for PP/PE/PS or similar plasticsUse of plastic logistic aids (baskets, trays, boxes, pallet, etc..)Soldering processPaint application shops with water-based paintElectrostatic paint applicationProcess where combustible liquids or cutting oils are usedFH3Printing works (metal foil)Paint application shops with solventPlating processesProcesses involving corrosive materials requiring plastic pipingProcesses using flammable liquids.Fire-lighter filling process.FH4
11 Storage Classification Sprinklers designed and specified against a hazard classification and are proven flexibleWater mist is application specificCategories will be called HHSWill include 5 Categories
12 Storage – Categories of Goods Category I and IIwill remain unchanged and be called HHS 1 and HHS 2Category III and IV are being evaluatedwill be split into three groups HHS 3, HHS 4 and HHS 5HHS 3 - Cartoned Unexpanded Plastics (laptop in box)HHS 4 – Uncartoned Unexpanded Plastics (garden chair)HHS 4 – Cartoned Expanded Plastics (pillows in box)HHS 5 – Uncartoned Expanded Plastics (sheets of polystyrene)You should think of HHS 4 as Category 3.5New designations will accommodate protection by proven protection schemes such as CMSA from USA
13 Special Hazards Intended to include specific design solutions Tyre storageAerosolsHanging garmentsEtc….
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