SIST EN 12416-2:2001+A1:2007
(Main)Fixed firefighting systems - Powder systems - Part 2: Design, construction and maintenance
Fixed firefighting systems - Powder systems - Part 2: Design, construction and maintenance
This document specifies requirements and gives recommendations for the design, construction and maintenance of fixed fire extinguishing systems which discharge powder from a container, or centrally grouped containers, through nozzles by means of expellant gas in accordance with EN 12416-1 and the relevant part of EN 54 where required. This European standard covers systems which are suitable for general use in buildings and other construction works as well as outdoor hazards.
Ortsfeste Brandbekämpfungsanlagen - Pulverlöschanlagen - Teil 2: Planung, Einbau und Wartung
!Dieses Dokument legt Anforderungen fest und gibt Empfehlungen für Planung, Einbau und Wartung von Pulverlöschanlagen, die mit Hilfe von Treibgas Löschpulver aus einem Behälter oder zentral angeordneten Behälterbatterien über Düsen nach EN 12416-1 und, wo erforderlich, nach den betreffenden Teilen von EN 54 ausstoßen."
Diese Europäische Norm gilt für Anlagen, die für die allgemeine Anwendung in Gebäuden und anderen Bauwerken, sowie im Freien geeignet sind.
!Diese Norm gilt nicht für Dauerdruckbehälter und vorgeplante Anlagen bis zu 150 kg Löschpulverinhalt, Schlauchleitungsanlagen mit Löschpulver und Anlagen mit Werfern, sowie für den Einsatz in explosions¬gefährdeten Bereichen, Erdbebengebieten oder unter extremen Umweltbedingungen, wie in der Seefahrt, auf Bohrinseln, im Bergbau oder in der Luftfahrt."
Diese Europäische Norm gilt nicht für Anlagen, bei denen die Gefahr eines Brandes der Klasse D nach EN 2 besteht.
Installations fixes de lutte contre l'incendie - Systemes d'extinction a poudre - Partie 2: Conception, construction et maintenance
La présente Norme européenne spécifie les exigences ainsi que les recommandations relatives à la conception, la construction et la maintenance d'ensembles comprenant des éléments de systèmes d'extinction à poudre pour la lutte contre l'incendie, fonctionnant à l'aide de poudre émise à partir d'un réservoir ou de plusieurs réservoirs groupés, au travers de diffuseurs et au moyen d'un gaz propulseur, conformément à l'EN 12416-1:2001 et à la partie concernée de l'EN 54, le cas échéant.
Les installations faisant l'objet de la présente norme sont adaptées à l'usage général à l'intérieur des immeubles et autres ouvrages de construction ainsi qu'aux phénomènes dangereux à l'extérieur.
Les systèmes à pression permanente, les systèmes précalculés pouvant contenir jusqu'à 150 kg d'agents extincteurs, les systèmes flexibles à poudre et systèmes de surveillance ne font pas l'objet de la présente norme, ni les zones où existent des risques d'explosion, les zones de tremblement de terre ou celles dans lesquelles règnent des conditions d'environnement extrêmes, telles les zones marines, de grand large, minières ou aériennes.
La présente Norme européenne ne s'applique pas aux systèmes où existe un risque de feux de classe "D" selon l'EN 2.
Vgrajeni gasilni sistemi - Sistemi s praškom - 2. del: Projektiranje, izvedba in vzdrževanje
General Information
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Standards Content (Sample)
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 12416-2:2001+A1:2007SIST EN 12416-2:2001+A1:2007en,fr,de01-december-2007SIST EN 12416-2:2001+A1:2007SLOVENSKI
STANDARD
SIST EN 12416-2:2001+A1:2007
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12416-2:2001+A1
June 2007 ICS 13.220.20 Supersedes EN 12416-2:2001English Version
Fixed firefighting systems - Powder systems - Part 2: Design, construction and maintenance
Installations fixes de lutte contre l'incendie - Systèmes d'extinction à poudre - Partie 2: Conception, construction et maintenance
Ortsfeste Brandbekämpfungsanlagen -Pulverlöschanlagen - Teil 2: Planung, Einbau und Wartung This European Standard was approved by CEN on 2 May 2001 and includes Amendment 1 approved by CEN on 16 May 2007.
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 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 Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36
B-1050 Brussels © 2007 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12416-2:2001+A1:2007: ESIST EN 12416-2:2001+A1:2007
EN 12416-2:2001+A1:2007 (E)
2 Contents
Foreword.3 Introduction.3 1
Scope.4 2
Normative references.4 3
Terms and definitions.5 4
Expellant gas.5 5
Extinguishing powder.5 6
Components.6 7
Reserve quantity.9 8
Location of extinguishing powder container and expellant gas container.9 9
Safety precautions.9 10
Total flooding systems.9 11
Local application systems.10 12
Control and release of powder extinguishing systems.11 13
Pipework design.12 14
Documentation, inspection and maintenance.17 15
Evaluation of conformity.18 Annex A (informative) Example calculations for local application system - surface fire.19 Annex B (informative) Example calculations for local application systems.20 Annex C (informative) Minimum design conditions for powder based on sodium bicarbonate.25
SIST EN 12416-2:2001+A1:2007
3 EN 12416-2:2001+A1:2007 (E)Foreword
This document (EN 12416-2:2001+A1:2007) has been prepared by Technical Committee CEN/TC 191 "Fixed firefighting systems", the secretariat of which is held by BSI.
This document shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by December 2007 and conflicting national standards shall be withdrawn at the latest by December 2007.
This document includes Amendment 1 approved by CEN on 2007-05-16.
This document supersedes EN 12416-2:2001.
The start and finish of text introduced or altered by amendment is indicated in the text by tags ! ".
This European Standard has the general title "Fixed firefighting systems - Powder systems" and consists of the following two parts:
- Part 1: Requirements and test methods for components - Part 2: Design, construction and maintenance
!deleted text"
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);
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) hose systems (EN 671);
g) water spray systems (EN 14816)."
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Introduction
It has been assumed in the preparation of this Standard that the execution of its provisions is entrusted to appropriately qualified and experienced people.
Risks which can be protected using powder extinguishing systems include the following:
a) Flammable or combustible liquids and combustible gases; and
b) Combustible solids having burning characteristics similar to naphthalene and pitch, which melt when involved in a fire; and
c) Combustibles such as wood, paper, or cloth arranged in such a way that powder extinguishant could reach all 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+A1:2007
EN 12416-2:2001+A1:2007 (E)
4 e) Combustibles arranged in such a way that there is a risk of deep seated or burrowing fires which the extinguishant would not be able to reach;
ABC powder should not be used on machinery such as carding equipment in textile operations or delicate electrical equipment 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 1 Powder, when discharged, will drift from the immediate discharge area and settle on surrounding surfaces. Prompt cleaning will minimize possible staining or corrosion of certain materials which may take place in the presence of moisture.
NOTE 2 The extinguishing of uncontrolled discharge of flammable liquids or combustible gases may result in a subsequent explosion.
!Powder systems can consist of the following components (see Figure 1):
powder container unit including pressure regulator;
expellant gas unit with mechanical and/or electrical delay system;
actuation and control system (manual or automatic release);
distribution header with selector valves assembly;
nozzles for total flooding or local application."
1
Scope
!This document specifies requirements and gives recommendations for the design, construction and maintenance of fixed fire extinguishing systems which discharge powder from a container, or centrally grouped containers, through nozzles by means of expellant gas in accordance with EN 12416-1 and the relevant part of EN 54 where required."
This European standard covers systems which are suitable for general use in buildings and other construction works as well as outdoor hazards.
!This standard does not cover systems with permanently pressurized containers and pre-engineered systems up to 150 kg of the extinguishing 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 references
This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments).
EN 54 (all relevant parts), Fire detection and fire alarm systems
!CEN/TS 54-14", Fire detection and fire alarm systems -
Part 14: Guidelines for planning, design, installation, commissioning, use and maintenance
EN 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 designated
!EN 12094-9", Fixed firefighting systems - Components for gas extinguishing systems - Part 9: Requirements and test methods for special fire detectors
EN 12416-1:2001, Fixed firefighting systems - Powder systems - Part 1: Requirements and test methods for components
SIST EN 12416-2:2001+A1:2007
5 EN 12416-2:2001+A1:2007 (E)EN 25923, Fire protection - Fire extinguishing media - Carbon dioxide (ISO 5923:1989)
!deleted text"
3
Terms and definitions
For the purposes of this Standard the terms and definitions of EN 12416-1:2001 and the following apply:
3.1 !powder system fixed installed system discharging powder as extinguishing media
3.2 discharge time time period, during which the design quantity of extinguishing powder is discharged
3.3 rate of application specific mass of extinguishing media to extinguish a fire in the protected zone
3.4 protected zone area or enclosure which is extinguished by the powder system "
4
Expellant gas
4.1
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 that the required powder quantity is discharged in at least the !maximum discharge time" and an additional expellant gas quantity shall be provided to empty the powder container and to allow the distribution pipe to be flushed at the working 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 CO2 concentration does not exceed 5 %Vol. in the protected enclosure. CO2 shall be in accordance with EN 25923.
Table 1 - Expellant gases
Gas Maximum water content %
Air
0,006 Argon
0,006 CO2
0,015 Helium
0,006 Nitrogen
0,006
5
Extinguishing powder
!This standard is applicable for the use of extinguishing powder based on sodium bicarbonate."
If other types of powder are used, the complete design and calculation shall be modified proportionally to the relative 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 of gas will increase pressure in the container to an unsafe level. Such increases in pressure have been known to cause 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 it is then recycled the powder may eventually become lumpy, and interrupt the flow of powder when used on a fire.
SIST EN 12416-2:2001+A1:2007
EN 12416-2:2001+A1:2007 (E)
6
6
Components
!Mechanical components shall be in accordance with EN 12416-1 and electrical components shall be in accordance with the relevant part of EN 54". The components used in the powder system shall be compatible. The installer shall declare and document the compatibility in accordance with !EN 12416-1". If components are not delivered by a single manufacturer, a function test without powder discharge shall be carried out in order to confirm the compatibility of the complete system.
A typical arrangement of the components in a powder system is given in Figure 1 and a block diagram for powder extinguishing systems is given in Figure 2.
SIST EN 12416-2:2001+A1:2007
7 EN 12416-2:2001+A1:2007 (E)
Key
1 Powder container 19 Drain connection
2 Fill opening 20 Main powder valve with pneumatic drive
3 Pressure gauge A 21 System test valve
4 Pressure regulator 22 Main isolating valve
5 Pressure gauge B 23 Solenoid valve
6 Expellant gas line 24 Control line for selector valve
7 Expellant gas container 25 Selector valve with pneumatic drive
8 Actuator for expellant gas container 26 Flushing valve
9 Flexible connector 27 Vent valve 10 Pilot container 28 Release control valve 11 Actuators for pilot container 29 Control line 12 Solenoid actuator 30 Pressure relief valve 13 Manual actuator 31 Powder nozzle 14 Delay device 32 Pipework 15 Drop weight with wire rope 33 Control panel and interface 16 Non-return valve 34 Fire detector 17 Expellant gas tube 35 Manual release 18 Powder diptube 36 Alarm device
Figure 1 - Typical arrangement of components in a powder system SIST EN 12416-2:2001+A1:2007
EN 12416-2:2001+A1:2007 (E)
8
Figure 2 - Block diagram for powder extinguishing systems
Alarm device B (internal) Alarm device (external) Alarm device A (internal) Control device
Powder container
Distribution pipework
Selector valve
Main pipework
Nozzles * Compulsory in case of danger for people Compulsory Optional Actuator for expellant gas container valve Change over device for automatic and manual release Triggering deviceTime delay device* Shut down device for fans, blowers, enclosure sealing and operation equipmentManual triggering device Automatic fire sensor Emergency triggering device, including power supply, delay and alarm Non-electrical disable device Actuator for selector valve
Non-electrical disable device SIST EN 12416-2:2001+A1:2007
9 EN 12416-2:2001+A1:2007 (E)7
Reserve quantity
When more than five separately released zones are included in the system a reserve quantity of powder and expellant gas of at least the same amount as the supply quantity shall be permanently connected. After manual changeover the reserve quantity and the supply quantity shall be in the fully operational mode. The reserve quantity shall be stored in a separate container.
8
Location of extinguishing powder container and expellant gas container
The extinguishing powder container and expellant gas container as well as the reserve quantities shall be located as close as possible to the flooding zone but not exposed to the risk of fire. The container shall be marked with the wording: ”CONTAINER SHALL NOT BE EXPOSED TO THE RISK OF FIRE”.
9
Safety precautions
In the event that people could be exposed to a powder discharge, appropriate safeguards shall be provided to ensure prompt evacuation of such locations, and to provide means for prompt rescue of any trapped people. Appropriate safeguards include personnel training, warning signs, fire alarms, delay devices and provision of respiratory protection. In any case the national regulations and legislation valid in the place of use shall be considered.
WARNING The discharge of powder can create hazards such as reduced visibility and temporary breathing difficulty.
10
Total flooding systems
10.1
General
In total flooding systems the total area of uncloseable openings shall not exceed 15 % of the total area.
NOTE Loss of powder from the enclosure generally reduces the extinguishing effectiveness of the system and should be minimized by closing openings wherever possible.
10.2
Quantity of powder
The quantity of powder discharged and the rate of application shall be sufficient to build up and maintain the calculated amount (Q) throughout the enclosure with an adequate margin of safety to compensate for any uncloseable openings, and for any ventilation system which is not shut down or closed off when the system is activated. The closure of the openings shall be arranged to occur no later than the start of discharge.
The total minimum quantity of powder shall be calculated with the following formula:
Q = K1 V + K2 AS + K3 AL + K4 RV t where
Q quantity of powder, in kilogram
K1 basic quantity factor, in kilograms per cubic metre
K2 additional quantity factor for openings 1% < AR < 5 % of the total area AR, in kilogram per square metre
K3 additional quantity factor for openings > 5 % of the total area, in kilograms per square metre
K4 additional quantity factor to compensate for any ventilation system which is not shut or closed down during the discharge, in kilograms per cubic metre
V total enclosure volume, in cubic metres
AR total area of enclosure (walls, ceiling, floor), in square metres
AS total area of openings > 5 % of AR, in square metres
AL total area of openings 5% < AR < 15% of AR, in square metres
RV ventilation flow rate, in cubic metres per second
t discharge time, in second.
SIST EN 12416-2:2001+A1:2007
EN 12416-2:2001+A1:2007 (E)
10 For hydrocarbon fires the following K-factor values shall be used:
K1 = 0,65 kg/m3
K2 = 2,5 kg/m2
K3 = 5,0 kg/m2
K4 = 0,65 kg/m3
For other types of fires the K-factors may be determined by fire tests or may be taken from reference installations.
10.3
Maximum discharge time and minimum rate of powder discharge
10.3.1
Maximum discharge time
The period from the release of the powder system to the discharge of the calculated amoun
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