Future Hazard Analysis in EN 12845 ‘Occupancy and Storage Classification’ Stuart Lloyd Principal Fire Protection Engineer Zurich Risk Engineering UK
Dec 14, 2015
Future Hazard Analysis in EN 12845‘Occupancy and Storage Classification’
Stuart LloydPrincipal Fire Protection EngineerZurich Risk Engineering UK
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Agenda
EN 12845 status
The past & current hazard analysis
Moving forward– Non Storage– Storage– Special Hazards
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Status
Current EN 12845 issued in 2009 – EN 12845:2004 +A2 – included amendments A1 and A2
Next EN 12845 to be published end 2014– EN 12845 Revision 1 (EN 12845:2014)
Future EN 12845 – EN 12845 Revision 2– In development– focus of this presentation
4January 2008
Occupancy Classification Taken from BS 5306 part 2 1990 (UK)
TYPE OF OCCUPANCY
Non industrial where theamount and combustibility
of the contents is low
Commercial and industrial
Processing and handlingmainly ordinary combustible
materials unlikely todevelop intensely burning
fires in the initial stages
Classification -Ordinary Hazard
Group I,II,III or IIIS (see table 3)
For example,some areas of:HospitalsHotelsLibrariesMuseumsNursing homesOffice buildingsPrisonsSchools,Colleges, etc
Goods storage - with abnormalfire loads likely to produce exceptionally intense fires
with a high rate of heatrelease
Process hazards - extrahazardous, likely todevelop rapidly and
intensely burning fires
Atticsbasementsboiler roomskitchenslaundriesstorage spacesworkrooms
Category of goodstype and height of storage
Classification -Ordinary Hazard
Group III
Classification -High Hazard
high piledstorage
Storage methodsS1 to S8
Type S9 orS10 potablespirit stores
Classification -High Hazard
process hazard
Classification – Light Hazard
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TYPE OF OCCUPANCY
Non industrial (where theamount and combustibilityof the contents is low)
Commercial and industrial
Processing and handlingmainly ordinary combustiblematerials unlikely todevelop intensely burning fires in the initial stages
Classification -Ordinary HazardGroup I,II,III,IV
For example,some areas of:HospitalsHotelsLibrariesMuseumsNursing homesPrisonsetc
Goods storage - with abnormalfire loads likely to produce exceptionally intense fireswith a high rate of heatrelease
Process hazards - extrahazardous, likely todevelop rapidly and intensely burning fires
Atticsbasementsboiler roomskitchenslaundriesstorage spaces*workrooms
Category of goodstype and height of storage
Classification -Ordinary Hazard Group III, IV
Classification -High Hazardhigh piledstorage
Storage methodsST1 to ST6
Classification -High Hazardprocess hazard
Classification – Light Hazard
HHP 1,2,3,4
*Storage may be High Hazard due to storage height/block size
Occupancy Classification (EN & CEA)Developed from text in standards (not illustrated)
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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 Storage
Future (5 options)– Fire Hazard 1– Fire Hazard 2– Fire Hazard 3– Fire Hazard 4– High Hazard Storage
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Future Density/Area for each FH
The most widely used density/areas have been adopted going forward
Fire Hazard Old designation Density mm/min Area wet m² Area dry m²
FH1 LH/OH1 5 72 90
FH2 OH2/OH3 5 216 270
FH3 OH4/HHP1 7,5 260 325
FH4 HHP2/HHP3 12,5 260 325
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Non Storage Occupancies
Figure 2.3 Fire Hazards “Non-Storage” overview:
NON-STORAGE OCCUPANCIES
NON-MANUFACTURING
OCCUPANCIES
MANUFACTURING OCCUPANCIES
Fire Hazard FH4
Fire Hazard FH3
Fire Hazard FH2
Fire HazardFH1
Fire HazardFH1
Fire Hazard FH2
Classification of fire hazard based on
typical occupancies
Classification of fire hazard based
on specified occupancies
The Non-Storage Occupancies have two sub-categories: a. Non-Manufacturing and b. Manufacturing Occupancies.
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Clearer GuidanceNon-manufacturing example
Educational Facilities Universities
Schools
Colleges
Nurseries
Prisons
Gymnasiums
Construction made of concrete or steel, low combustible load, no carpets.
FH1
Construction 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 L
FH2
Storage Rooms. HHS
Some aspects based on construction All aspects based on risk evaluation Tables identify ‘typical risks’ associated with premise type
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Clearer Guidance Manufacturing example
Manufacturing occupancies and their associated Fire Hazard Class continued.
Occupancy Description Special Consideration Fire Hazard
Mechanical Engineering
Or Assembling Plant
-Sheet metal product factories-Metal working-Electric and Electronics equipment factories- White Appliances factories - Circuit board manufacturing- Car workshops- Fire-lighter manufacture
−Water-based emulsion for grinding, drilling, cutting, stamping processes
FH2
−injection molding (plastics) for PP/PE/PS or similar plastics
−Use of plastic logistic aids (baskets, trays, boxes, pallet, etc..)
−Soldering process−Paint application shops with water-based
paint −Electrostatic paint application−Process where combustible liquids or
cutting oils are used
FH3
−Printing works (metal foil)−Paint application shops with solvent−Plating processes−Processes involving corrosive materials
requiring plastic piping−Processes using flammable liquids.−Fire-lighter filling process.
FH4
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Storage Classification
Categories will be called HHS Will include 5 Categories
Figure 2.2 Fire Hazards “Storage” overview:
High Hazard Storage HHS2
High Hazard Storage HHS4
High Hazard Storage HHS3
High Hazard StorageHHS5
High Hazard Storage HHS1
Determination of Storage
Configuration?
STORAGE OCCUPANCIES
Commoditiy and Fire Hazard
Classification Process?
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Storage – Categories of Goods
Category I and II – will remain unchanged and be called HHS 1 and HHS 2
Category III and IV are being evaluated – will be split into three groups HHS 3, HHS 4 and HHS 5
– HHS 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 3.5
New designations will accommodate protection by proven protection schemes such as CMSA from USA
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Special Hazards
Intended to include specific design solutions – Tyre storage– Aerosols– Hanging garments– Etc….
Figure 2.1 – Special Hazards Overview:
SPECIAL HAZARDS
Special Hazards associated to special storage configuration
Special Hazards associated to special storage commodities
Special Hazards associated to special construction properties
Special Hazards associated to special production processes
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Future Flow Chart
FIRE HAZARDS CLASSIFICATION – Basic Evaluation
Is this a Special Hazard
OccupancyYES
Table 3.4 List of Special Hazard associated to special storage configuration.
Table 3.3List of Special Hazard associated to special storage commodities.
Table 3.1 List of Special Hazards associated with building or construction issues.
Table 3.2 List of Special Hazard associated with special production processes.
Is this a storage occupancy?
No
YES
High Hazard Storage HHS2
High Hazard Storage HHS4
High Hazard Storage HHS3
High Hazard StorageHHS5
High Hazard Storage HHS1
STORAGE OCCUPANCIES
Flow Chart 4.2.1.1 Fire
Hazard Classification Process for
Storage Commodities
Evaluation Process of
Special Hazard _ LOOK UP
Table 3.1to 3.4
Is this a non- manufacturing occupancy?
Table 5.2: manufacturing
occupancies and their associated
Fire Hazard Class.
Table 5.1: non-manufacturing
occupancies and their associated
Fire Hazard Class.
YES
NO
NO
Fire Hazard FH4
Fire Hazard FH3
Fire Hazard FH2
Fire HazardFH1
Special Storage Hazard/Special Storage Commodity?
Flow chart 2.1 Basic Evaluation Process:
Storage Configuration?
LOOK UP Section 4.3
Check for Special Storage Configuration?
NON- STORAGE OCCUPANCIES
Special Hazard YES
Special Hazard w Construction and/or Production
Sprinkler Design to adequatly protect associated fire hazards
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Thank You, Any Questions?