SIST EN 12416-2:2001

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Vgrajeni gasilni sistemi - Sistemi s praškom - 2. del: Projektiranje, izvedba in vzdrževanjeOrtsfeste Brandbekämpfungsanlagen - Pulverlöschanlagen - Teil 2: Planung, Einbau und WartungInstallations fixes de lutte contre l'incendie - Systemes d'extinction a poudre - Partie 2: Conception, construction et maintenanceFixed firefighting systems - Powder systems - Part 2: Design, construction and maintenance13.220.10Gašenje požaraFire-fightingICS:Ta slovenski standard je istoveten z:EN 12416-2:2001SIST EN 12416-2:2001en01-oktober-2001SIST EN 12416-2:2001SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12416-2June 2001ICS 13.220.20English versionFixed firefighting systems - Powder systems - Part 2: Design,construction and maintenanceInstallations fixes de lutte contre l'incendie - Systèmesd'extinction à poudre - Partie 2: Conception, construction etmaintenanceOrtsfeste Brandbekämpfungsanlagen - Pulverlöschanlagen- Teil 2: Planung, Einbau und WartungThis European Standard was approved by CEN on 2 May 2001.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 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 translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2001 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12416-2:2001 ESIST EN 12416-2:2001

Page 2EN 12416-2:2001ContentsForeword.3Introduction.31
Scope.42
Normative references.43
Terms and definitions.54
Expellant gas.55
Extinguishing powder.56
Components.57
Reserve quantity.88
Location of extinguishing powder container and expellant gas container.89
Safety precautions.810
Total flooding systems.811
Local application systems.912
Control and release of powder extinguishing systems.1013
Pipework design.1114
Evaluation of characteristics.1615
Documentation, inspection and maintenance.1616
Evaluation of conformity.18Annex A (informative) Example calculations for local application system - surface fire.19Annex B (informative) Example calculations for local application systems.20Annex C (informative) Minimum design conditions for powder based on sodium bicarbonate.25Annex ZA (informative)
Clauses of this European Standard addressing the provisions of the EU ConstructionProducts Directive.29Bibliography.36SIST EN 12416-2:2001

Page 3EN 12416-2:2001ForewordThis European Standard has been prepared by Technical Committee CEN/TC 191 "Fixed firefighting systems",the secretariat of which is held by BSI.This European Standard shall be given the status of a national standard, either by publication of an identicaltext or by endorsement, at the latest by December 2001, and conflicting national standards shall be withdrawnat the latest by December 2001.This European Standard has the general title "Fixed firefighting systems - Powder systems" and consists of thefollowing two parts:- Part 1: Requirements and test methods for components- Part 2: Design, construction and maintenanceThis European Standard has been prepared under a mandate given to CEN by the European Commission andthe European Free Trade Association, and supports essential requirements of EU Directive(s).For relationship with EU Directives, see informative Annex ZA, which is an integral part of this standard.Annexes A to C are informative annexes.This European standard is included in a series of European Standards planned to cover also:a) gas extinguishing systems (EN 12094 and EN ISO 14520);b) sprinkler systems (EN 12259 and EN 12845);c) smoke control systems (EN 12101);d) explosion protection systems (EN 26184);e) foam systems (EN 13565)f) hydrant and hose reel systems (EN 671-2);g) semi-rigid hose systems (EN 671-1);h) water spray systemsAccording to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countriesare bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France,Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerlandand the United Kingdom.IntroductionIt has been assumed in the preparation of this Standard that the execution of its provisions is entrusted toappropriately qualified and experienced people.Risks which can be protected using powder extinguishing systems include the following:a) Flammable or combustible liquids and combustible gases; andb) Combustible solids having burning characteristics similar to naphthalene and pitch, which melt wheninvolved in a fire; andc) Combustibles such as wood, paper, or cloth arranged in such a way that powder extinguishant could reachall burning surfaces in the event of a fire.Powder extinguishing systems shall not be used to provide protection for the following:d) Chemicals containing their own oxygen supply such as cellulose nitrate;SIST EN 12416-2:2001

Page 4EN 12416-2:2001e) Combustibles arranged in such a way that there is a risk of deep seated or burrowing fires which theextinguishant would not be able to reach;ABC powder should not be used on machinery such as carding equipment in textile operations or delicate electricalequipment because, upon exposure to temperatures in excess of 120 °C or relative humidity in excess of 50 %,deposits will be formed which can be corrosive, conductive and difficult to remove.NOTE 1Powder, when discharged, will drift from the immediate discharge area and settle on surrounding surfaces. Prompt cleaningwill minimize possible staining or corrosion of certain materials which may take place in the presence of moisture.NOTE 2The extinguishing of uncontrolled discharge of flammable liquids or combustible gases may result in a subsequent explosion.Powder systems can consist of the following kits (see Figure 1):- KIT 1: powder container unit including pressure regulator;- KIT 2: expellant gas unit with mechanical and/or electrical delay system;- KIT 3: actuation and control system (manual or automatic release);- KIT 4: distribution header with selector valves assembly;- KIT 5: nozzles for total flooding or local application.- KIT 6: kits for complete powder systems1
ScopeThis European Standard specifies requirements and gives recommendations for the design, construction andmaintenance of kits covering components of powder fire extinguishing systems which discharge powder from acontainer, or centrally grouped containers, through nozzles by means of expellant gas in accordance withEN 12416-1:2001 and the relevant part of EN 54 where required.This European standard covers systems which are suitable for general use in buildings and other constructionworks as well as outdoor hazards.This standard does not cover stored pressure systems or pre-engineered systems up to 150 kg of theextinguishing media quantity, powder hose lines and monitor systems, nor areas with a risk of explosion,earthquake zones or extreme environmental conditions e.g. marine, offshore, mining or aircraft.This European standard does not apply to systems where there is a risk of class "D" fires according to EN 2.2
Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies (including amendments).EN 54 (all relevant parts), Fire detection and fire alarm systemsprEN 54-14:1996, Fire detection and fire alarm systems -
Part 14: Guidelines for planning, design, installation,commissioning, use and maintenanceEN 615, Fire protection - Fire extinguishing media - Specifications for powders (other than class D powders)EN 1092, Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN designatedprEN 12094-9:1999, Fixed firefighting systems - Components for gas extinguishing systems - Part 9:Requirements and test methods for special fire detectorsEN 12416-1:2001, Fixed firefighting systems - Powder systems - Part 1: Requirements and test methods forcomponentsEN 25923, Fire protection - Fire extinguishing media - Carbon dioxide (ISO 5923:1989)EN ISO 9000 (all parts), Quality management and quality assurance standardsSIST EN 12416-2:2001

Page 5EN 12416-2:20013
Terms and definitionsFor the purposes of this Standard the terms and definitions of EN 12416-1:2001 and the following apply:3.1powder system kitset of components which, when installed, form the complete or part of a powder system4
Expellant gas4.1
The expellant gas shall be one of the gases listed in table 1.The quantity of expellant gas shall be calculated for the most hydraulically unfavourable flooding zone such thatthe required powder quantity is discharged in at least the minimum discharge time and an additional expellant gasquantity shall be provided to empty the powder container and to allow the distribution pipe to be flushed at theworking pressure for a period of at least 1 min.4.2
When using CO2 as expellant gas the system shall be carefully designed to ensure that the CO2concentration does not exceed 5 %Vol. in the protected enclosure. CO2 shall be in accordance with EN 25923.Table 1 - Expellant gasesGasMaximum water content%Air0,006Argon0,006CO20,015Helium0,006Nitrogen0,0065
Extinguishing powderThis Standard is based on the use of sodium bicarbonate powder.If other types of powder are used, the complete design and calculation shall be modified proportionally to therelative efficiency of this powder.The powder shall be in accordance with EN 615.WARNING 1
The mixing of different types of powder (ABC and BC) may result in caking, and the production ofgas will increase pressure in the container to an unsafe level. Such increases in pressure have been known tocause containers to rupture, and to cause bodily injury and damage.WARNING 2
Recovered powder may have previously been contaminated, and may have absorbed moisture. If itis then recycled the powder may eventually become lumpy, and interrupt the flow of powder when used on a fire.6
ComponentsMechanical components shall be in accordance with EN 12416-1:2001 and electrical components shall be inaccordance with the relevant part of EN 54 or, in its absence, an appropriate specification valid in the place of useof the kit. The components used in the powder system shall be compatible. The installer shall declare anddocument the compatibility in accordance with EN 12416-1:2001, clause 12. If components are not delivered by asingle manufacturer, a function test without powder discharge shall be carried out in order to confirm thecompatibility of the complete system.A typical arrangement of the components in a powder system is given in Figure 1 and a block diagram for powderextinguishing systems is given in Figure 2.SIST EN 12416-2:2001

Page 6EN 12416-2:2001Key 1 Powder container19 Drain connection 2 Fill opening20 Main powder valve with pneumatic drive 3 Pressure gauge A21 System test valve 4 Pressure regulator22 Main isolating valve 5 Pressure gauge B23 Solenoid valve 6 Expella
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