SIST EN 12845:2015
(Main)Fixed firefighting systems - Automatic sprinkler systems - Design, installation and maintenance
Fixed firefighting systems - Automatic sprinkler systems - Design, installation and maintenance
This European Standard specifies requirements and gives recommendations for the design, installation and maintenance of fixed fire sprinkler systems in buildings and industrial plants, and particular requirements for sprinkler systems that are integral to measures for the protection of life.
This European Standard covers only the types of sprinkler specified in EN 12259 1 (see Annex L).
The requirements and recommendations of this European Standard are also applicable to any addition, extension, repair or other modification to a sprinkler system. They are not applicable to water spray or deluge systems.
It covers the classification of hazards, provision of water supplies, components to be used, installation and testing of the system, maintenance, and the extension of existing systems, and identifies construction details of buildings which are the minimum necessary for satisfactory performance of sprinkler systems complying with this European Standard.
This European Standard does not cover water supplies to systems other than sprinklers. Its requirements can be used as guidance for other fixed firefighting extinguishing systems, provided that any specific requirements for other firefighting extinguishing supplies are taken into account.
This European Standard is intended for use by those concerned with purchasing, designing, installing, testing, inspecting, approving, operating and maintaining automatic sprinkler systems, in order that such equipment will function as intended throughout its life.
This European Standard is intended only for fixed fire sprinkler systems in buildings and other premises on land. Although the general principles might well apply to other uses (e.g. maritime use), For these other uses additional considerations should be taken into account.
The requirements are not valid for automatic sprinkler systems on ships, in aircraft, on vehicles and mobile fire appliances or for below ground systems in the mining industry.
Sprinkler system design deviations might be allowed when such deviations have been shown to provide a level of protection at least equivalent to this European Standard, for example by means of full-scale fire testing where appropriate, and where the design criteria have been fully documented.
Ortsfeste Brandbekämpfungsanlagen - Automatische Sprinkleranlagen - Planung, Installation und Instandhaltung
Diese Europäische Norm legt Anforderungen fest und gibt Empfehlungen für die Planung, den Einbau und die Instand¬haltung von ortsfesten Sprinkleranlagen in Gebäuden und Industrieanlagen. Sie legt Anforderungen an besondere Sprinkleranlagen fest, die für Maßnahmen zum Schutz des menschlichen Lebens wesentlich sind.
Diese Europäische Norm gilt nur für die in EN 12259 1 festgelegten Sprinklerarten (siehe Anhang L).
Die Anforderungen und Empfehlungen dieser Europäischen Norm gelten auch für jede Ergänzung, Erweiterung, Reparatur oder sonstige Veränderung an Sprinkleranlagen. Sie gelten nicht für Sprühwasser Löschanlagen (en: waterspray or deluge systems).
Diese Europäische Norm umfasst die Klassifizierung von Gefahren, die Art der Wasserversorgungen, die zu verwendenden Bauteile, den Einbau und die Prüfung der Anlage, die Instandhaltung und Erweiterung bestehender Anlagen. Sie weist Konstruktionsdetails von Gebäuden aus, die für das ordnungsgemäße Funktionieren von Sprinkleranlagen nach dieser Europäischen Norm erforderlich sind.
Diese Europäische Norm gilt nicht für Wasserversorgungen für andere als Sprinkleranlagen. Ihre Anforderungen können als Leitfaden für andere ortsfeste Brandbekämpfungsanlagen verwendet werden, wobei vorausgesetzt wird, dass für andere Löschmittel besondere Anforderungen zu berücksichtigen sind.
Diese Europäische Norm richtet sich an alle, die mit der Beschaffung, der Planung, dem Einbau, der Prüfung, der Überprüfung, die Anerkennung, dem Betreiben und der Instandhaltung von automatischen Sprinkleranlagen befasst sind, um sicherzustellen, dass diese Einrichtungen wie vorgesehen während ihrer gesamten Lebensdauer ordnungsgemäß arbeiten.
Diese Europäische Norm gilt nur für ortsfeste Sprinkleranlagen in Gebäuden und anderen Einrichtungen auf dem Land. Auch wenn die allgemeinen Prinzipien durchaus auf andere Anwendungen zutreffen (z. B. Einsatz in der See¬schifffahrt), sollten in der Regel für diese Anwendungen zusätzliche Aspekte berücksichtigt werden.
Die Anforderungen gelten nicht für automatische Sprinkleranlagen auf Schiffen, in Flugzeugen, auf Fahrzeugen und mobilen Brandbekämpfungseinrichtungen oder für unterirdische Anlagen in der Bergbauindustrie.
Abweichungen in der Planung von Sprinkleranlagen können zulässig sein, wenn für diese Abweichungen nachgewiesen worden ist, dass ein Schutzniveau erreicht wird, das mindestens dieser Europäischen Norm entspricht, z. B. durch 1:1 Brandversuche, wo angemessen, und wenn die Auslegungskriterien vollständig dokumentiert wurden.
Installations fixes de lutte contre l‘incendie - Systèmes d’extinction automatique du type sprinkleur - Conception, installation et maintenance
La présente Norme européenne spécifie des exigences et fournit des recommandations pour la conception, l'installation et la maintenance d'installations fixes de lutte contre l'incendie de type sprinkleur dans des bâtiments et des installations industrielles et spécifie des exigences particulières pour les systèmes d'extinction de type sprinkleur faisant partie intégrante de mesures de protection des personnes.
La présente Norme européenne ne concerne que les types de sprinkleur spécifiés dans l’EN 12259-1 (voir Annexe L).
Les exigences et recommandations de la présente Norme européenne sont également applicables à tout ajout, extension ou autre modification apportée à un système d'extinction de type sprinkleur. Elles ne sont pas applicables aux installations à pulvérisation d’eau ou de type déluge.
La présente norme couvre la classification des risques, l'installation de sources d'eau, les éléments à utiliser, l'installation et les essais du système, la maintenance et l'extension de systèmes existants, et elle identifie les détails de construction des bâtiments qui sont nécessaires au fonctionnement satisfaisant des systèmes d'extinction de type sprinkleur conformes à la présente Norme européenne.
La présente Norme européenne ne couvre pas les sources d’eau alimentant des systèmes autres que les systèmes de type sprinkleur. Ses exigences peuvent être utilisées comme guide pour les autres installations fixes de lutte contre l'incendie, sous réserve que les exigences spécifiques à ces autres systèmes de lutte contre l’incendie soient prises en compte.
La présente Norme européenne est destinée aux personnes chargées de l'achat, de la conception, de l'installation, des essais, des inspections, de l'approbation, de l'utilisation et de la maintenance des systèmes automatiques de type sprinkleur. Elle les aidera à obtenir de ces équipements un fonctionnement nominal pendant toute leur durée de vie.
La présente Norme européenne ne concerne que les installations fixes de lutte contre l'incendie de type sprinkleur, installées dans des bâtiments et autres locaux sur la terre ferme. Bien que les principes généraux puissent s'appliquer à d'autres usages (par exemple l'usage maritime), il convient de tenir compte d'autres considérations pour ces autres usages.
Les exigences ne sont pas valables pour les systèmes d'extinction automatiques de type sprinkleur installés sur des bateaux, dans des aéronefs, sur des véhicules et des engins mobiles d'incendie, ni pour les systèmes d'extinction souterrains dans l'industrie minière.
Des écarts dans la conception des systèmes de sprinkleurs peuvent être autorisés lorsqu’il a été démontré que ces écarts assurent un niveau de protection au moins équivalent à la présente Norme européenne, par exemple par les essais au feu en vraie grandeur suivant le cas et lorsque les critères de calcul ont été documentés dans leur ensemble.
Vgrajene naprave za gašenje - Avtomatski sprinklerski sistemi - Projektiranje, vgradnja in vzdrževanje
Ta evropski standard določa zahteve in podaja priporočila za projektiranje, vgradnjo in vzdrževanje vgrajenih sprinklerskih sistemov v zgradbah in industrijskih obratih ter posebne zahteve za sprinklerske sisteme, ki so nujni za ukrepe za zaščito življenja.
Ta evropski standard zajema le tipe sprinklerjev, ki so navedeni v standardu EN 12259 1 (glej dodatek L).
Zahteve in priporočila tega evropskega standarda veljajo tudi za vse dodatke, razširitve, popravila ali druge spremembe sprinklerskega sistema. Zahteve ne veljajo za pršilne sisteme za vodo ali sisteme za preplavljanje z vodo.
Standard zajema razvrstitev nevarnosti, zagotavljanje oskrbe z vodo, sestavne dele za uporabo, vgradnjo in testiranje sistema ter vzdrževanje in razširitev obstoječih sistemov ter opredeljuje minimalne konstrukcijske podrobnosti stavb za uspešno izvedbo sprinklerskih sistemov v skladu s tem evropskim standardom.
Ta evropski standard ne zajema zagotavljanja oskrbe z vodo drugih sistemov, razen sprinklerskih. Zahteve standarda se lahko uporabijo kot smernice za druge vgrajene sisteme za gašenje, od pogojem, da so upoštevane katere koli posebne zahteve za druga sredstva za gašenje.
Ta evropski standard je namenjen za uporabo s strani tistih oseb, ki se ukvarjajo z nabavo, projektiranjem, vgradnjo, preskušanjem, pregledovanjem, potrjevanjem, upravljanjem in vzdrževanjem avtomatskih sprinklerskih sistemov, z namenom, da bi taka oprema delovala kot predvideno vso življenjsko dobo.
Ta evropski standard se uporablja samo za vgrajene sprinklerske sisteme v zgradbah in drugih objektih na tleh. Čeprav bi splošna načela verjetno lahko uporabili tudi v druge namene (npr. pomorsko uporabo), je treba za te druge uporabe upoštevati dodatne dejavnike.
Zahteve niso veljavne za avtomatske sprinklerske sisteme na ladjah, vozilih in za mobilne naprave za gašenje ali za podzemne sisteme za rudarsko industrijo.
Odstopanja pri konstrukciji sprinklerskih sistemov so dovoljena, če ta odstopanja dokazano zagotavljajo raven zaščite, ki je najmanj enakovredna zaščiti iz tega evropskega standarda, npr. dokazana s pomočjo požarnega preskusa, kjer je to primerno, in pri kateri so konstrukcijski kriteriji v celoti dokumentirani.
General Information
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Standards Content (Sample)
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 - Systèmes d’extinction automatique du type sprinkleur - Conception, installation et maintenanceFixed firefighting systems - Automatic sprinkler systems - Design, installation and maintenance13.220.10Gašenje požaraFire-fightingICS:Ta slovenski standard je istoveten z:EN 12845:2015SIST EN 12845:2015en,fr,de01-september-2015SIST EN 12845:2015SLOVENSKI
STANDARDSIST EN 12845:2005+A2:20091DGRPHãþD
SIST EN 12845:2015
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12845
June 2015 ICS 13.220.20 Supersedes EN 12845:2004+A2:2009English Version
Fixed firefighting systems - Automatic sprinkler systems - Design, installation and maintenance
Installations fixes de lutte contre l'incendie - Systèmes d'extinction automatique du type sprinkleur - Conception, installation et maintenance
Ortsfeste Brandbekämpfungsanlagen - Automatische Sprinkleranlagen - Planung, Installation und InstandhaltungThis European Standard was approved by CEN on 20 December 2014.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12845:2015 ESIST EN 12845:2015
EN 12845:2015 (E) 2 Contents Page Foreword . 12 Introduction . 13 1 Scope . 15 2 Normative references . 15 3 Terms and definitions . 16 4 Contract planning and documentation . 23 4.1 General . 23 4.2 Initial considerations . 23 4.3 Preliminary or estimating stage . 23 4.4 Design stage . 24 4.4.1 General . 24 4.4.2 Summary schedule . 24 4.4.3 Installation layout drawings . 25 4.4.4 Water supply . 28 5 Extent of sprinkler protection . 30 5.1 Buildings and areas to be protected. 30 5.1.1 General . 30 5.1.2 Permitted exceptions within a building . 30 5.1.3 Necessary exceptions . 30 5.2 Storage in the open air . 30 5.3 Fire resistant separation . 30 5.4 Protection of concealed spaces . 31 5.5 Height difference between the highest and lowest sprinklers . 31 6 Classification of occupancies and fire hazards . 31 6.1 General . 31 6.2 Hazard classes . 31 6.2.1 General . 31 6.2.2 Light Hazard – LH . 31 6.2.3 Ordinary Hazard – OH . 31 6.2.4 High Hazard – HH . 32 6.3 Storage . 33 6.3.1 General . 33 6.3.2 Storage Configuration . 33 7 Hydraulic design criteria . 36 7.1 LH, OH and HHP . 36 7.2 High Hazard Storage – HHS . 37 7.2.1 General . 37 7.2.2 Ceiling or roof protection only . 37 7.2.3 Intermediate level in-rack sprinklers . 38 7.3 Pressure and flow requirements for pre-calculated systems . 40 7.3.1 LH and OH systems . 40 7.3.2 HHP and HHS systems without in-rack sprinklers . 40 8 Water supplies . 42 8.1 General . 42 8.1.1 Duration . 42 8.1.2 Continuity . 42 8.1.3 Frost protection . 43 SIST EN 12845:2015
EN 12845:2015 (E) 3 8.2 Maximum water pressure . 43 8.3 Connections for other services . 44 8.4 Housing of equipment for water supplies . 44 8.5 Test facility devices . 44 8.5.1 General . 44 8.5.2 At pump house . 45 8.5.3 At control valve sets . 45 8.6 Water supply test . 45 8.6.1 General . 45 8.6.2 Storage tank and pressure tank supplies . 46 8.6.3 Town main, booster pump, elevated private reservoir and gravity tank supplies . 46 9 Type of water supply . 46 9.1 General . 46 9.2 Town mains . 46 9.3 Storage tanks . 46 9.3.1 General . 46 9.3.2 Water volume . 47 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 . 50 9.3.6 Strainers . 51 9.4 Inexhaustible sources – settling and suction chambers . 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 . 55 9.6.1 Single water supplies . 55 9.6.2 Superior single water supplies . 56 9.6.3 Duplicate water supplies . 56 9.6.4 Combined water supplies . 56 9.7 Isolation of water supply . 57 10 Pumps . 57 10.1 General . 57 10.2 Multiple pump arrangements . 57 10.3 Compartments for pumpsets . 58 10.3.1 General . 58 10.3.2 Sprinkler protection . 58 10.3.3 Temperature . 58 10.3.4 Ventilation . 58 10.4 Maximum temperature of water supply . 58 10.5 Valves and accessories . 58 10.6 Suction conditions . 59 10.6.1 General . 59 10.6.2 Suction pipe . 59 10.7 Performance characteristics . 62 10.7.1 Pre-calculated systems – LH and OH . 62 10.7.2 Pre-calculated systems – HHP and HHS with no in-rack sprinklers . 63 10.7.3 Calculated systems . 64 10.7.4 Pressure and water capacity of boosted town mains . 65 10.7.5 Pressure switches . 65 10.8 Electrically driven pumpsets . 65 10.8.1 General . 65 SIST EN 12845:2015
EN 12845:2015 (E) 4 10.8.2 Electricity supply . 65 10.8.3 Main switchboard. 66 10.8.4 Installation between the main switchboard and the pump controller . 67 10.8.5 Pump controller . 67 10.8.6 Monitoring of pump operation . 67 10.9 Diesel engine driven pumpsets . 67 10.9.1 General . 67 10.9.2 Engines . 68 10.9.3 Cooling system . 68 10.9.4 Air filtration . 68 10.9.5 Exhaust system. 68 10.9.6 Fuel, fuel tank and fuel feed pipes . 68 10.9.7 Starting mechanism . 69 10.9.8 Electric starter motor batteries . 70 10.9.9 Battery chargers . 70 10.9.10 Siting of batteries and chargers . 70 10.9.11 Starter alarm indication . 71 10.9.12 Tools and spare parts . 71 10.9.13 Engine tests and exercising . 71 11 Installation type and size . 72 11.1 Wet pipe installations . 72 11.1.1 General . 72 11.1.2 Protection against freezing . 72 11.1.3 Size of installations . 72 11.2 Dry pipe installations . 73 11.2.1 General . 73 11.2.2 Size of installations . 73 11.3 Alternate installations . 73 11.3.1 General . 73 11.3.2 Size of installations . 74 11.4 Pre-action installations . 74 11.4.1 General . 74 11.4.2 Automatic detection system . 74 11.4.3 Size of installations . 75 11.5 Subsidiary dry pipe or alternate extension . 75 11.5.1 General . 75 11.5.2 Size of subsidiary extensions . 75 11.6 Subsidiary water spray extension. 75 12 Spacing and location of sprinklers . 75 12.1 General . 75 12.2 Maximum area of coverage per sprinkler . 76 12.3 Minimum distance between sprinklers . 77 12.4 Location of sprinklers in relation to building construction. 78 12.5 Intermediate sprinklers in HH occupancies . 84 12.5.1 General . 84 12.5.2 Maximum vertical distance between sprinklers at intermediate levels . 84 12.5.3 Horizontal position of sprinklers at intermediate levels . 84 12.5.4 Numbers of rows of sprinklers at each level . 86 12.5.5 HHS intermediate sprinklers in non-shelved racks . 86 12.5.6 HHS intermediate sprinklers below solid or slatted shelves in racks (ST5 and ST6) . 87 13 Pipe sizing and layout . 88 13.1 General . 88 13.2 Calculation of pressure losses in pipework . 88 13.2.1 Pipe friction loss . 88 13.2.2 Static pressure difference . 89 SIST EN 12845:2015
EN 12845:2015 (E) 5 13.2.3 Velocity . 89 13.2.4 Pressure loss through fittings and valves . 89 13.2.5 Accuracy of calculations . 90 13.3 Pre-calculated systems. 91 13.3.1 General . 91 13.3.2 Location of Design Points . 91 13.3.3 Light Hazard - LH . 92 13.3.4 Ordinary Hazard - OH . 93 13.3.5 High hazard - HHP and HHS (except intermediate level sprinklers) . 95 13.4 Fully calculated systems . 103 13.4.1 Design density . 103 13.4.2 Locations of the area of operation . 104 13.4.3 Shape of the area of operation . 104 13.4.4 Minimum sprinkler discharge pressure . 108 13.4.5 Minimum pipe diameters . 108 14 Sprinkler design characteristics and uses . 108 14.1 General . 108 14.2 Sprinkler types and application . 108 14.2.1 General . 108 14.2.2 Ceiling, flush, recessed and concealed pattern . 109 14.2.3 Sidewall pattern . 109 14.2.4 Flat spray pattern . 109 14.3 Flow from sprinklers .
...
SLOVENSKI STANDARD
kSIST FprEN 12845:2014
01-september-2014
Vgrajene naprave za gašenje - Avtomatski sprinklerski sistemi - Projektiranje,
vgradnja in vzdrževanje
Fixed firefighting systems - Automatic sprinkler systems - Design, installation and
maintenance
Ortsfeste Brandbekämpfungsanlagen - Automatische Sprinkleranlagen - Planung,
Installation und Instandhaltung
Installations fixes de lutte contre l‘incendie - Systèmes d’extinction automatique du type
sprinkleur - Conception, installation et maintenance
Ta slovenski standard je istoveten z: FprEN 12845
ICS:
13.220.20 3RåDUQD]DãþLWD Fire protection
kSIST FprEN 12845:2014 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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kSIST FprEN 12845:2014
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kSIST FprEN 12845:2014
EUROPEAN STANDARD
FINAL DRAFT
FprEN 12845
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2014
ICS 13.220.20 Will supersede EN 12845:2004+A2:2009
English Version
Fixed firefighting systems - Automatic sprinkler systems -
Design, installation and maintenance
Installations fixes de lutte contre l'incendie - Systèmes Ortsfeste Brandbekämpfungsanlagen - Automatische
d'extinction automatique du type sprinkleur - Conception, Sprinkleranlagen - Planung, Installation und Instandhaltung
installation et maintenance
This draft European Standard is submitted to CEN members for unique acceptance procedure. It has been drawn up by the Technical
Committee CEN/TC 191.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other language
made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2014 CEN All rights of exploitation in any form and by any means reserved Ref. No. FprEN 12845:2014 E
worldwide for CEN national Members.
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kSIST FprEN 12845:2014
FprEN 12845:2014 (E)
Contents Page
Foreword . 12
Introduction . 13
1 Scope . 15
2 Normative references . 15
3 Terms and definitions . 16
4 Contract planning and documentation . 23
4.1 General . 23
4.2 Initial considerations . 23
4.3 Preliminary or estimating stage . 23
4.4 Design stage . 24
4.4.1 General . 24
4.4.2 Summary schedule . 24
4.4.3 Installation layout drawings . 25
4.4.4 Water supply . 28
5 Extent of sprinkler protection . 30
5.1 Buildings and areas to be protected. 30
5.1.1 General . 30
5.1.2 Permitted exceptions within a building . 30
5.1.3 Necessary exceptions . 30
5.2 Storage in the open air . 30
5.3 Fire resistant separation . 30
5.4 Protection of concealed spaces . 31
5.5 Height difference between the highest and lowest sprinklers . 31
6 Classification of occupancies and fire hazards . 31
6.1 General . 31
6.2 Hazard classes . 31
6.2.1 General . 31
6.2.2 Light Hazard – LH . 31
6.2.3 Ordinary Hazard – OH . 31
6.2.4 High Hazard – HH . 32
6.3 Storage . 33
6.3.1 General . 33
6.3.2 Storage Configuration . 33
7 Hydraulic design criteria . 36
7.1 LH, OH and HHP . 36
7.2 High Hazard Storage – HHS . 37
7.2.1 General . 37
7.2.2 Ceiling protection only . 37
7.2.3 Intermediate level in-rack sprinklers . 38
7.3 Pressure and flow requirements for pre-calculated systems . 40
7.3.1 LH and OH systems . 40
7.3.2 HHP and HHS systems without in-rack sprinklers . 40
8 Water supplies . 42
8.1 General . 42
8.1.1 Duration . 42
8.1.2 Continuity . 42
8.1.3 Frost protection . 43
2
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kSIST FprEN 12845:2014
FprEN 12845:2014 (E)
8.2 Maximum water pressure . 43
8.3 Connections for other services . 44
8.4 Housing of equipment for water supplies . 44
8.5 Test facility devices . 44
8.5.1 General . 44
8.5.2 At pump house . 45
8.5.3 At control valve sets . 45
8.6 Water supply test . 45
8.6.1 General . 45
8.6.2 Storage tank and pressure tank supplies . 46
8.6.3 Town main, booster pump, elevated private reservoir and gravity tank supplies . 46
9 Type of water supply . 46
9.1 General . 46
9.2 Town mains . 46
9.3 Storage tanks . 46
9.3.1 General . 46
9.3.2 Water volume . 47
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
9.5 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 . 55
9.6.1 Single water supplies . 55
9.6.2 Superior single water supplies . 56
9.6.3 Duplicate water supplies . 56
9.6.4 Combined water supplies . 56
9.7 Isolation of water supply . 57
10 Pumps . 57
10.1 General . 57
10.2 Multiple pump arrangements . 57
10.3 Compartments for pumpsets . 58
10.3.1 General . 58
10.3.2 Sprinkler protection . 58
10.3.3 Temperature . 58
10.3.4 Ventilation . 58
10.4 Maximum temperature of water supply . 58
10.5 Valves and accessories . 58
10.6 Suction conditions . 59
10.6.1 General . 59
10.6.2 Suction pipe . 59
10.7 Performance characteristics . 62
10.7.1 Pre-calculated systems – LH and OH . 62
10.7.2 Pre-calculated systems – HHP and HHS with no in-rack sprinklers . 63
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
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FprEN 12845:2014 (E)
10.8.2 Electricity supply . 65
10.8.3 Main switchboard. 66
10.8.4 Installation between the main switchboard and the pump controller . 66
10.8.5 Pump controller . 67
10.8.6 Monitoring of pump operation . 67
10.9 Diesel engine driven pumpsets . 67
10.9.1 General . 67
10.9.2 Engines . 67
10.9.3 Cooling system . 68
10.9.4 Air filtration . 68
10.9.5 Exhaust system. 68
10.9.6 Fuel, fuel tank and fuel feed pipes . 68
10.9.7 Starting mechanism . 69
10.9.8 Electric starter motor batteries . 70
10.9.9 Battery chargers . 70
10.9.10 Siting of batteries and chargers . 70
10.9.11 Starter alarm indication . 71
10.9.12 Tools and spare parts . 71
10.9.13 Engine tests and exercising . 71
11 Installation type and size . 72
11.1 Wet pipe installations . 72
11.1.1 General . 72
11.1.2 Protection against freezing . 72
11.1.3 Size of installations . 72
11.2 Dry pipe installations . 73
11.2.1 General . 73
11.2.2 Size of installations . 73
11.3 Alternate installations . 73
11.3.1 General . 73
11.3.2 Size of installations . 74
11.4 Pre-action installations . 74
11.4.1 General . 74
11.4.2 Automatic detection system . 74
11.4.3 Size of installations . 75
11.5 Subsidiary dry pipe or alternate extension . 75
11.5.1 General . 75
11.5.2 Size of subsidiary extensions . 75
11.6 Subsidiary water spray extension. 75
12 Spacing and location of sprinklers . 75
12.1 General . 75
12.2 Maximum area of coverage per sprinkler . 76
12.3 Minimum distance between sprinklers . 77
12.4 Location of sprinklers in relation to building construction. 78
12.5 Intermediate sprinklers in HH occupancies . 84
12.5.1 General . 84
12.5.2 Maximum vertical distance between sprinklers at intermediate levels . 84
12.5.3 Horizontal position of sprinklers at intermediate levels . 84
12.5.4 Numbers of rows of sprinklers at each level . 86
12.5.5 HHS intermediate sprinklers in non-shelved racks . 86
12.5.6 HHS intermediate sprinklers below solid or slatted shelves in racks (ST5 and ST6) . 87
13 Pipe sizing and layout . 88
13.1 General . 88
13.1.1 Pipe sizing . 88
13.2 Calculation of pressure losses in pipework . 88
13.2.1 Pipe friction loss . 88
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kSIST FprEN 12845:2014
FprEN 12845:2014 (E)
13.2.2 Static pressure difference . 89
13.2.3 Velocity . 89
13.2.4 Pressure loss through fittings and valves . 89
13.2.5 Accuracy of calculations . 90
13.3 Pre-calculated systems. 91
13.3.1 General . 91
13.3.2 Location of Design Points . 91
13.3.3 Light Hazard - LH . 92
13.3.4 Ordinary Hazard - OH . 93
13.3.5 High hazard - HHP and HHS (except intermediate level sprinklers) . 95
13.4 Fully calculated systems . 103
13.4.1 Design density . 103
13.4.2 Locations of the area of operation . 104
13.4.3 Shape of the area of operation . 104
13.4.4 Minimum sprinkler discharge pressure . 108
13.4.5 Minimum pipe diameters .
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