SIST EN 12845:2005

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Vgrajene naprave za gašenje – Avtomatski sprinklerski sistemi - Projektiranje, vgradnja in vzdrževanjeOrtsfeste Brandbekämpfungsanlagen - Automatische Sprinkleranlagen - Planung, Installation und InstandhaltungInstallations fixes de lutte contre l'incendie - Systemes d'extinction automatiques du type sprinkleur - Calcul, installation et maintenanceFixed firefighting systems - Automatic sprinkler systems - Design, installation and maintenance13.220.20Fire protectionICS:Ta slovenski standard je istoveten z:EN 12845:2004SIST EN 12845:2005en,fr,de01-januar-2005SIST EN 12845:2005SLOVENSKI
STANDARDSIST EN 12845:20031DGRPHãþD



SIST EN 12845:2005



EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12845September 2004ICS 13.220.20Supersedes EN 12845:2003
English versionFixed firefighting systems - Automatic sprinkler systems -Design, installation and maintenanceInstallations fixes de lutte contre l'incendie - Systèmesd'extinction automatiques du type sprinkleur - Calcul,installation et maintenanceOrtsfeste Brandbekämpfungsanlagen - AutomatischeSprinkleranlagen - Planung, Installation und InstandhaltungThis European Standard was approved by CEN on 16 April 2004.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2004 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12845:2004: ESIST EN 12845:2005



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Contents page Foreword.9 Introduction.10 1 Scope.12 2 Normative references.12 3 Terms and definitions.13 4 Contract planning and documentation.20 4.1 General.20 4.2 Initial considerations.20 4.3 Preliminary or estimating stage.21 4.4 Design stage.21 4.4.1 General.21 4.4.2 Summary schedule.21 4.4.3 Installation layout drawings.22 4.4.4 Water supply.25 5 Extent of sprinkler protection.27 5.1 Buildings and areas to be protected.27 5.1.1 Permitted exceptions within a building.27 5.1.2 Necessary exceptions.27 5.2 Storage in the open air.28 5.3 Fire resistant separation.28 5.4 Protection of concealed spaces.28 5.5 Height difference between the highest and lowest sprinklers.28 6 Classification of occupancies and fire hazards.28 6.1 General.28 6.2 Hazard classes.29 6.2.1 Light Hazard - LH.29 6.2.2 Ordinary Hazard - OH.29 6.2.3 High Hazard - HH.30 6.3 Storage.31 6.3.1 General.31 6.3.2 Storage Configuration.32 7 Hydraulic design criteria.34 7.1 LH, OH and HHP.34 7.2 High Hazard Storage - HHS.35 7.2.1 General.35 7.2.2 Ceiling or roof protection only.35 7.2.3 Intermediate level in-rack sprinklers.36 7.3 Pressure and flow requirements for pre-calculated systems.38 7.3.1 LH and OH systems.38 7.3.2 HHP and HHS systems without in-rack sprinklers.39 8 Water supplies.42 8.1 General.42 8.1.1 Duration.42 8.1.2 Continuity.42 8.1.3 Frost protection.42 8.2 Maximum water pressure.42 SIST EN 12845:2005



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8.3 Connections for other services.43 8.4 Housing of equipment for water supplies.44 8.5 Test facility devices.44 8.5.1 At control valve sets.44 8.5.2 At water supplies.45 8.6 Water Supply test.45 8.6.1 General.45 8.6.2 Storage tank and pressure tank supplies.45 8.6.3 Town main, booster pump, elevated private reservoir and gravity tank supplies.45 9 Type of water supply.45 9.1 General.45 9.2 Town mains.45 9.2.1 General.45 9.2.2 Boosted mains.46 9.3 Storage tanks.46 9.3.1 General.46 9.3.2 Water volume.46 9.3.3 Refill rates for full capacity tanks.48 9.3.4 Reduced capacity tanks.48 9.3.5 Effective capacity of tanks and dimensions of suction chambers.49 9.3.6 Strainers.51 9.4 Inexhaustible sources - Settling and suction chambers.51 9.4.1 .51 9.5 Pressure tanks.54 9.5.1 General.54 9.5.2 Housing.54 9.5.3 Minimum capacity (water).54 9.5.4 Air pressure and contents.54 9.5.5 Charging with air and water.55 9.5.6 Control and safety equipment.55 9.6 Choice of water supply.56 9.6.1 Single water supplies.56 9.6.2 Superior water supplies.56 9.6.3 Duplicate water supplies.56 9.6.4 Combined water supplies.57 9.7 Isolation of water supply.57 10 Pumps.58 10.1 General.58 10.2 Multiple pump arrangements.58 10.3 Compartments for pumpsets.58 10.3.1 General.58 10.3.2 Sprinkler protection.58 10.3.3 Temperature.59 10.3.4 Ventilation.59 10.4 Maximum temperature of water supply.59 10.5 Valves and accessories.59 10.6 Suction conditions.59 10.6.1 General.59 10.6.2 Suction pipe.60 10.7 Performance characteristics.63 10.7.1 Pre-calculated systems - LH and OH.63 10.7.2 Pre-calculated systems - HHP and HHS with no in-rack sprinklers.64 10.7.3 Calculated systems.64 10.7.4 Pressure and water capacity of boosted town mains.64 10.7.5 Pressure switches.65 10.8 Electrically driven pumpsets.65 10.8.1 General.65 10.8.2 Electricity supply.65 SIST EN 12845:2005



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10.8.3 Main switchboard.65 10.8.4 Installation between the main switchboard and the pump controller.66 10.8.5 Pump controller.66 10.8.6 Monitoring of pump operation.66 10.9 Diesel engine driven pumpsets.67 10.9.1 General.67 10.9.2 Engines.67 10.9.3 Cooling system.67 10.9.4 Air filtration.67 10.9.5 Exhaust system.67 10.9.6 Fuel, fuel tank and fuel feed pipes.68 10.9.7 Starting mechanism.68 10.9.8 Electric starter motor batteries.69 10.9.9 Battery chargers.69 10.9.10Siting of batteries and chargers.70 10.9.11Starter alarm indication.70 10.9.12Tools and spare parts.70 10.9.13Engine tests and exercising.70 11 Installation type and size.71 11.1 Wet pipe installations.71 11.1.1 General.71 11.1.2 Protection against freezing.71 11.1.3 Size of installations.72 11.2 Dry pipe installations.72 11.2.1 General.72 11.2.2 Size of installations.72 11.3 Alternate installations.73 11.3.1 General.73 11.3.2 Size of installations.73 11.4 Pre-action installations.73 11.4.1 General.73 11.4.2 Automatic detection system.74 11.4.3 Size of installations.74 11.5 Subsidiary dry pipe or alternate extension.74 11.5.1 General.74 11.5.2 Size of subsidiary extensions.74 11.6 Subsidiary water spray extension.74 12
Spacing and location of sprinklers.75 12.1 General.75 12.2 Maximum area of coverage per sprinkler.75 12.3 Minimum distance between sprinklers.77 12.4 Location of sprinklers in relation to building construction.77 12.5 Intermediate sprinklers in HH occupancies.83 12.5.1 General.83 12.5.2 Maximum vertical distance between sprinklers at intermediate levels.83 12.5.3 Horizontal position of sprinklers at intermediate levels.83 12.5.4 Numbers of rows of sprinklers at each level.85 12.5.5 HHS intermediate sprinklers in non-shelved racks.85 12.5.6 HHS intermediate sprinklers below solid or slatted shelves in racks (ST5 and ST6).86 13 Pipe sizing and layout.87 13.1 General.87 13.1.1 Pipe sizing.87 13.2 Calculation of pressure losses in pipework.87 13.2.1 Pipe friction loss.87 13.2.2 Static pressure difference.88 13.2.3 Velocity.88 13.2.4 Pressure loss through fittings and valves.88 13.2.5 Accuracy of calculations.90 SIST EN 12845:2005



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13.3 Pre-calculated systems.90 13.3.1 General.90 13.3.2 Location of Design Points.90 13.3.3 Light Hazard - LH.91 13.3.4 Ordinary Hazard - OH.93 13.3.5 High hazard - HHP and HHS (except intermediate level sprinklers).95 13.4.1 Design density.104 13.4.2 Locations of the area of operation.105 13.4.3 Shape of the area of operation.105 13.4.4 Minimum sprinkler discharge pressure.108 13.4.5 Minimum pipe diameters.108 14 Sprinkler design characteristics and uses.109 14.1 General.109 14.2 Sprinkler types and application.109 14.2.1 General.109 14.2.2 Ceiling, flush, recessed and concealed pattern.110 14.2.3 Sidewall pattern.110 14.2.4 Flat spray pattern.111 14.3 Flow from sprinklers.111 14.4 Sprinkler temperature ratings.111 14.5 Sprinkler thermal sensitivity.111 14.5.1 General.111 14.5.2 Interaction with other measures.112 14.6 Sprinkler guards.112 14.7 Sprinkler water shields.112 14.8 Sprinkler rosettes.113 14.9 Corrosion protection of sprinklers.
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