Stuart Lloyd, Zurich Risk Engineering, UK
Future Hazard Analysis in EN 12845 ‘Occupancy and Storage Classification’ Stuart Lloyd Principal Fire Protection Engineer Zurich Risk Engineering UK Agenda EN 12845 status The past & current hazard analysis Moving forward – Non Storage – Storage – Special Hazards 2 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 3 Occupancy Classification Taken from BS 5306 part 2 1990 (UK) TYPE OF OCCUPANCY Non industrial where the amount and combustibility of the contents is low For example, some areas of: Hospitals Hotels Libraries Museums Nursing homes Office buildings Prisons Schools, Colleges, etc Processing and handling mainly ordinary combustible materials unlikely to develop intensely burning fires in the initial stages Attics basements boiler rooms kitchens laundries storage spaces workrooms Classification – Light Hazard January 2008 Commercial and industrial Goods storage - with abnormal fire loads likely to produce exceptionally intense fires with a high rate of heat release Process hazards - extra hazardous, likely to develop rapidly and intensely burning fires Category of goods type and height of storage Classification Ordinary Hazard Group I,II,III or IIIS (see table 3) Classification Ordinary Hazard Group III Classification High Hazard high piled storage Storage methods S1 to S8 Type S9 or S10 potable spirit stores Classification High Hazard process hazard 4 Occupancy Classification (EN & CEA) Developed from text in standards (not illustrated) TYPE OF OCCUPANCY Commercial and industrial Non industrial (where the amount and combustibility of the contents is low) For example, some areas of: Hospitals Hotels Libraries Museums Nursing homes Prisons etc Attics basements boiler rooms kitchens laundries storage spaces* workrooms Processing and handling mainly ordinary combustible materials unlikely to develop intensely burning fires in the initial stages Goods storage - with abnormal fire loads likely to produce exceptionally intense fires with a high rate of heat release Process hazards - extra hazardous, likely to develop rapidly and intensely burning fires Category of goods type and height of storage Classification Ordinary Hazard Group I,II,III,IV Classification Ordinary Hazard Group III, IV Classification – Light Hazard Classification High Hazard high piled storage Classification High Hazard process hazard HHP 1,2,3,4 Storage methods ST1 to ST6 *Storage may be High Hazard due to storage height/block size 5 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 6 Future Density/Area for each FH 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 The most widely used density/areas have been adopted going forward 7 Non Storage Occupancies Figure 2.3 Fire Hazards “Non-Storage” overview: Fire Hazard FH1 Classification of fire hazard based on typical occupancies Fire Hazard FH2 Fire Hazard FH1 NONMANUFACTURING OCCUPANCIES Fire Hazard FH2 NON-STORAGE OCCUPANCIES Fire Hazard FH3 MANUFACTURING OCCUPANCIES Classification of fire hazard based on specified occupancies Fire Hazard FH4 The Non-Storage Occupancies have two sub-categories: a. Non-Manufacturing and b. Manufacturing Occupancies. 8 Clearer Guidance Non-manufacturing example Educational Facilities Universities Schools Colleges Nurseries Prisons Gymnasiums Construction made of concrete or steel, low combustible load, no carpets. 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 FH1 Storage Rooms. HHS FH2 Some aspects based on construction All aspects based on risk evaluation Tables identify ‘typical risks’ associated with premise type 9 Clearer Guidance Manufacturing example Manufacturing occupancies and their associated Fire Hazard Class continued. Occupancy Description Mechanical Engineering -Sheet metal product factories -Metal working Or Assembling Plant -Electric and Electronics equipment factories - White Appliances factories - Circuit board manufacturing - Car workshops - Fire-lighter manufacture Special Consideration Fire Hazard 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 10 Storage Classification Figure 2.2 Fire Hazards “Storage” overview: High Hazard Storage HHS1 High Hazard Storage HHS2 STORAGE OCCUPANCIES Commoditiy and Fire Hazard Classification Process? High Hazard Storage HHS3 Determination of Storage Configuration? High Hazard Storage HHS4 High Hazard Storage HHS5 Categories will be called HHS Will include 5 Categories 11 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 12 Special Hazards Figure 2.1 – Special Hazards Overview: Special Hazards associated to special construction properties Special Hazards associated to special production processes SPECIAL HAZARDS Special Hazards associated to special storage commodities Special Hazards associated to special storage configuration Intended to include specific design solutions – – – – Tyre storage Aerosols Hanging garments Etc…. 13 Future Flow Chart Flow chart 2.1 Basic Evaluation Process: 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. FIRE HAZARDS CLASSIFICATION – Basic Evaluation Special Hazard Is this a Special Hazard Occupancy YES Evaluation Process of Special Hazard _ LOOK UP Table 3.1to 3.4 Table 3.3List of Special Hazard associated to special storage commodities. Table 3.4 List of Special Hazard associated to special storage configuration. YES Special Hazard w Construction and/or Production Special Storage Hazard/Special Storage Commodity? No Is this a storage occupancy? High Hazard Storage HHS1 YES STORAGE OCCUPANCIES High Hazard Storage HHS2 Flow Chart 4.2.1.1 Fire Hazard Classification Process for Storage Commodities High Hazard Storage HHS3 YES Table 5.1: nonmanufacturing occupancies and their associated Fire Hazard Class. Storage Configuration? LOOK UP Section 4.3 High Hazard Storage HHS4 NO NON- STORAGE OCCUPANCIES Check for Special Storage Configuration? Fire Hazard FH1 High Hazard Storage HHS5 Is this a nonmanufacturing occupancy? NO Table 5.2: manufacturing occupancies and their associated Fire Hazard Class. Fire Hazard FH2 Sprinkler Design to adequatly protect associated fire hazards Fire Hazard FH3 Fire Hazard FH4 14 Thank You, Any Questions? 15
© Copyright 2024