EN 12416-1:2001
(Main)Fixed firefighting systems - Powder systems - Part 1: Requirements and test methods for components
Fixed firefighting systems - Powder systems - Part 1: Requirements and test methods for components
This European standard specifies requirements for materials, construction and performance of components intended for use in powder firefighting systems complying with EN 12416-2, which covers gas container systems with a maximum working pressure not exceeding 25 bar at 20°C. It does not cover stored pressure systems, pre-engineerd systems, powder hose lines and monitor systems. Methods of test are also given.
Ortsfeste Brandbekämpfungsanlagen - Pulverlöschanlagen - Teil 1: Anforderungen und Prüfverfahren für Bauteile
Anwendungsbereich
Die Europäische Norm legt Anforderungen und Prüfverfahren für Werkstoffe, Konstruktion und Leis-tungsmerkmale
von Bauteilen fest, die für die Anwendung in Pulverlöschanlagen nach
EN 12416-2:2001 bestimmt sind.
Folgende Bauteile werden beschrieben:
- Pulverbehälter,
- Treibgasbehältergruppen,
- Druckregler,
- Auslöseeinrichtungen,
- Hauptabsperr- und Bereichsventile,
- Düsen.
Die Bauteile sind für Pulverlöschanlagen für die allgemeine Verwendung in Gebäuden und sonstigen
Bauwerken geeignet. Beim Einsatz in explosionsgefährdeten Bereichen, Erdbebengebieten oder unter
extremen Umweltbedingungen, wie in der Seefahrt, auf Bohrinseln, im Bergbau oder in der Luftfahrt
können weitere Anforderungen gelten.
Diese Norm behandelt Bauteile für die Anwendung in Pulverlöschanlagen nach EN 12416-2:2001. In
der vorliegenden Norm werden z. B. Rohre und Fittings nicht behandelt, die in anderen allgemeinen
Normen beschrieben sind und für die Anforderungen und Empfehlungen in EN 12416-2:2001 gegeben
werden. Außerdem werden weder Brandmelder noch Brandmelderzentralen behandelt.
Installations fixes de lutte contre l'incendie - Systèmes d'extinction à poudre - Partie 1: Exigences et méthodes d'essais des éléments constitutifs
Domaine d'application
La présente norme européenne spécifie les exigences et les méthodes d'essai s'appliquant aux matériaux, à la construction et aux performances des éléments destinés à un usage au sein d'installations de lutte contre l'incendie utilisant la poudre conformes au prEN 12416-2:2000.
Les éléments faisant l'objet de la présente norme sont les suivants :
¾ réservoirs de poudre ;
¾ systèmes de réserve du gaz propulseur ;
¾ régulateurs de pression ;
¾ systèmes de déclenchement ;
¾ vannes d'isolation principales et vannes directionnelles ;
¾ diffuseurs.
Ces éléments sont adaptés aux installations de lutte contre l'incendie d'usage général utilisant la poudre, situées dans les immeubles et autres ouvrages de construction. Les surfaces où existent des risques d'explosion, ainsi que 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, peuvent faire l'objet de dispositions complémentaires.
La présente norme s'applique aux éléments destinés à un usage au sein de systèmes d'extinction à poudre conformes au prEN 12416-2:2000. Elle ne s'applique pas, par exemple, aux tuyaux et raccords faisant l'objet de normes plus générales, dont les exigences et recommandations sont indiquées dans le prEN 12416-2:2000. Par ailleurs, elle ne s'applique pas aux détecteurs ni aux équipements électriques de commande ou d'indication.
Vgrajeni gasilni sistemi - Sistemi s praškom - 1. del: Zahteve in prekusne metode za sestavne dele
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Fixed firefighting systems - Powder systems - Part 1: Requirements and test methods for componentsVgrajeni gasilni sistemi - Sistemi s praškom - 1. del: Zahteve in prekusne metode za sestavne deleInstallations fixes de lutte contre l'incendie - Systemes d'extinction a poudre - Partie 1: Exigences et méthodes d'essais des éléments constitutifsOrtsfeste Brandbekämpfungsanlagen - Pulverlöschanlagen - Teil 1: Anforderungen und Prüfverfahren für BauteileTa slovenski standard je istoveten z:EN 12416-1:2001SIST EN 12416-1:2001en13.220.10Gašenje požaraFire-fightingICS:SLOVENSKI
STANDARDSIST EN 12416-1:200101-oktober-2001
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12416-1March 2001ICS 13.220.20English versionFixed firefighting systems - Powder systems - Part 1:Requirements and test methods for componentsInstallations fixes de lutte contre l'incendie - Systèmesd'extinction à poudre - Partie 1: Exigences et méthodesd'essais des éléments constitutifsOrtsfeste Brandbekämpfungsanlagen - Pulverlöschanlagen- Teil 1: Anforderungen und Prüfverfahren für BauteileThis European Standard was approved by CEN on 18 January 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 12416-1:2001 E
Page 2EN 12416-1:2001ContentspageForeword.3Introduction.31
Scope.42
Normative references.43
Terms and definitions.54 General requirements for components.75
Powder container.76
Expellant gas container assembly.87
Pressure gauges.98
Pressure regulators.99
Actuators.1010
Main isolating valve and selector valve.1211
Nozzles.1312
Documentation.1313
Marking.1414
Type test methods.1515
Evaluation of conformity.17Annex A (normative) Internal pressure test.18Annex B (normative) Internal pressure test.18Annex C (normative) Operating force and function test.18Annex D (normative) Opening and closing times.20Annex E (normative) Low temperature test for actuators and valves.20Annex F (normative) High temperature test.20Annex G (normative) Vibration test.21Annex H (normative) Reliability test.21Annex I (normative) Salt spray corrosion test.22Annex J (normative) Stress corrosion test.22Annex K (normative) Strength test for pressure regulators, main isolating valves and selector valves.22Annex L (normative) Jet velocity test.23Annex M (normative) Flow rate test.24Annex ZA (informative) Clauses of this European Standard addressing the provisions of the EUConstruction Products Directive.25Bibliography.28
Page 3EN 12416-1:2001ForewordThis 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 September 2001, and conflicting national standards shall be withdrawnat the latest by December 2002.This 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 Directive(s), see informative Annex ZA, which is an integral part of this standard.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 componentsPart 2 : Design, construction and maintenanceAnnex A to annex M are normative 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) hydrant and hose reel systems (EN 671-1);g) semi-rigid hose systems (EN 671-2);h) water spray systems.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark,Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain,Sweden, Switzerland and 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.
Page 4EN 12416-1:20011
ScopeThis European Standard specifies requirements and test methods for materials, construction and performance ofcomponents intended for use in powder firefighting systems complying with prEN 12416-2:2000.The components covered are as follows:- powder containers- expellant gas container assemblies- pressure regulators and gauges- actuators- main isolating valves and selector valves- nozzles.The components are suitable for powder firefighting systems for general use in buildings and other constructionworks. In areas with a risk of explosion, earthquake zones, extreme environmental conditions e.g. marine,offshore, mining or aircraft additional considerations apply.This standard covers components for use in powder extinguishing systems complying with prEN 12416-2:2000. Itdoes not cover, for example, pipes and fittings which are covered by more general standards for whichrequirements and recommendations are given in prEN 12416-2:2000. Nor does it cover fire detectors or electricalcontrol and indicating equipment.2
Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited in 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 2, Classification of firesEN 286-1:1998, Simple unfired pressure vessels designed to contain air or nitrogen - Part 1: Pressure vesselsfor general purposesEN 615, Fire protection - Fire extinguishing media - Specifications for powders (other than class D powders)EN 849, Transportable gas cylinders - Cylinder valves - Specification and type testingEN 1964-1, Transportable gas cylinders - Specification for the design and construction of refillable transportableseamless steel gas cylinders of water capacities from 0,5 litre up to and including 150 litres - Part 1: Cylindersmade of seamless steel with an Rm value of less than 1100MPaprEN 1964-2:1998, Transportable gas cylinders - Specification for the design and construction of refillabletransportable seamless steel gas cylinders from 0,5 litre up to and including 150 litres - Part 2: Tensile strength(Rm max.)
1100 N/mm2EN 1964-3, Transportable gas cylinders - Specification for the design and construction of refillable transportableseamless steel gas cylinders of water capacities from 0,5 litre up to and including 150 litres - Part 3: Cylindersmade of seamless stainless steel with an Rm value of less than 1100MPaprEN 12094-4:1998, Fixed firefighting systems - Components for C02 systems - Part 4: Requirements and testmethods for high pressure container valve assemblies and their actuatorsEN 12094-5:2000, Fixed firefighting systems - Components for gas extinguishing systems - Part 5:Requirements and test methods for high and low pressure selector valves and their actuators for CO2 systemsEN 12094-8, Fixed firefighting systems - Components for gas extinguishing systems - Part 8: Requirementsand test methods for flexible connectors for CO2 systems
Page 5EN 12416-1:2001EN 12094-13:2001, Fixed firefighting systems - Components for gas extinguishing systems - Part 13:Requirements and test methods for check valves and non-return valvesEN 60068-2-6:1995, Environmental testing - Part 2: Tests - Test Fc: Vibration (sinusoidal)(IEC 60068-2-6:1995 + Corrigendum 1995)EN 60529:1991, Degrees of protection provided by enclosures (IP Code) (IEC 60529:1989)ISO/DIS 4126-1, Safety devices for the protection against excessive pressure - Part 1: Safety valves (Revisionof ISO 4126-1:1991)ISO/DIS 4126-2, Safety devices for the protection against excessive pressure - Part 2: Bursting disc safetydevicesISO 3864, Safety colour and safety signs3
Terms and definitionsFor the purposes of this European Standard the following terms and definitions apply:3.1actuatorcomponent which when receiving a signal operates another component3.2bursting discdiaphragm designed to burst at a predetermined pressure difference3.3calculation zonezone for which the design quantity of the extinguishing media required is calculated separately3.4diptube (of the powder container)tube through which powder from the lower part of the container is transported into the piping3.5equipment firefire of three dimensional objects, also subject to leakage, dripping or splashing3.6expellant gas containerhigh pressure container to store the expellant gas3.7expellant gas container valvevalve which retains the expellant gas in the expellant gas container, and which releases it when actuated3.8fill ratio (of the expellant gas container)mass of an expellant gas relative to the net capacity of the expellant gas container, expressed in kilograms perlitre (kg/l)3.9flooding zonezone comprising all calculation zones to be flooded simultaneously with the extinguishing media via one selectorvalve3.10local application systemsystem to protect separate objects
Page 6EN 12416-1:20013.11maximum working pressurepressure (at a temperature of 50 °C) at which the system or the component can still work and may be operated3.12minimum release energyenergy which is needed for the operation of a component3.13minimum working pressurepressure (at a temperature of - 20 °C) at which the system or the component can still be operated3.14non-return valvecomponent permitting flow only in one direction3.15nozzlecomponent to achieve determined performance characteristics and a uniform distribution into or at a protectedzone3.16pilot containerpower source for a pneumatic alarm device and for actuation of the expellant gas container3.17(extinguishing) powderextinguishing medium composed of finely divided solid chemical products consisting of one or more principlecomponents, which are combined with additives to improve its characteristics [EN 615]NOTE 1
In North America and some other countries, the term "dry powder" is used to denote special metalfire extinguishing agents and the term "dry chemical extinguishing agent" is used to denote theextinguishing medium specified in this European Standard.NOTE 2
When it is useful to indicate the class of fire for which a powder is designed, capital letters may beadded before the term. The letters used in this European Standard are those defined in EN 2.EXAMPLE
BC powder is designed to extinguish class B (liquids or liquefied solids) and class C (gases)fires; ABC powder is designed to extinguish class A (solids which form glowing members), class B andclass C fires.3.18protected zonethe entire number of flooding zones protected by one system3.19selector valvecomponent which opens or prevents the flow of extinguishing media into a flooding zone3.20surface firefire spreading across horizontal surfaces. A surface fire may be a fire involving flammable liquids, gases or solids,not subjected to smouldering3.21total flooding systemsystem to protect the entire contents of an enclosed space3.22working pressurepressure at which the component is used in the system
Page 7EN 12416-1:20013.23working temperature rangetemperature range at which the system or the component can still work and may be operated4 General requirements for components4.1 Working temperature rangeThe components shall have a working temperature range of - 20 °C to + 50 °C.If CO2 pilot containers or CO2 expellant gas containers are used the working temperature range shall be 0 °C to40 °C.4.2 General test facilitiesIt shall be ensured that the function of all actuators can be tested without discharging the expellant gas.Depending on the type of the system test connectors for an external test cylinder shall be available.4.3
Stress corrosion testIf copper alloy parts are used they shall be subjected to the stress corrosion test in annex J.5
Powder container 5.1
CapacityThe volume shall be not more than 4000 l.5.2
DesignThe powder container shall be designed in accordance with EN 286-1 and shall be made of steel.5.3
Maximum working pressureThe maximum working pressure shall not exceed 25 bar.5.4
ColourThe powder containers shall be coloured red in accordance with ISO 3864.5.5
Fittings5.5.1
Powder filling openingThe powder filling opening of the container shall be not less than DN 100.Sight-holes, handholes, headholes and manholes may be used for filling in accordance with EN 286-1, if they arelocated on the top of the powder container.5.5.2
Drain connectionFor inspection of the interior of the container and testing of the powder, a drain connection to empty the powdercontainer shall be provided.Drain connections shall be not less than:- for V up to 1000 l : R 1/2 or Rp1/2 or G 1/2;- for V above 1000 l :
R 1 or Rp1 or G 1.
Page 8EN 12416-1:20015.5.3
Pressure relief deviceThe powder container shall be fitted with a pressure relief device. The set pressure of the pressure relief device isnever greater than the maximum working pressure, but after pressure relief has commenced the pressure canexceed the maximum working pressure by 10 % maximum. The gas flow rate through the pressure relief deviceshall be greater than the maximum rate of expellant gas entering into the powder container.5.5.4
Connection for the expellant gas tubeThe expellant gas tube shall be fitted to the powder container discharging the gas below the powder surface. Thesystem shall be designed to prevent powder entering the expellant gas system.5.5.5
Powder diptubeThe powder container shall be fitted with a powder diptube.The diptube shall be fixed with sufficient strength to resist damage during operation (filling, emptying of thecontainer or during the discharge of powder).The distance between diptube and the base of the container shall be such that the highest point of the inlet of thediptube is not more than twice the internal diameter of the diptube, see Figure 1:h
2 d.where:his the distance between diptube inlet and container base, in millimetres (mm)dis the internal diameter of the diptube, in millimetres (mm)Figure 1 - Distance between diptube and base of container.6
Expellant gas container assembly6.1
Expellant gas containersExpellant gas containers shall be constructed in accordance with EN 1964-1, prEN 1964-2:1998 and EN 1964-3.To check the contents of the expellant gas container at any time, all individual containers shall be fitted witha) a weighing device in case of pressure liquefied gases to weigh the contents;b) in other cases with a working pressure gauge in accordance with Table 1 to indicate the internal pressureof the container.dh
Page 9EN 12416-1:20016.2
Expellant gas valvesIf the system has an automatic and a manual release, the expellant gas valve shall be in accordance withprEN 12094-4:1998 but without a diptube. If the system has a manual release only, an expellant gas containervalve in accordance with EN 849 may be used, in this case CO2 as expellant gas is not permitted and there is noneed for any safety precautions, such as delay devices.6.3
Actuators for expellant gas valvesActuators for expellant gas valves shall comply with requirements for actuators in prEN 12094-4:1998.6.4
ManifoldsManifolds shall withstand a pressure of 1,5 times the maximum pressure of the gas used at a temperature of50 °C when tested in accordance with annex B.6.5
Flexible connectors and non-return valveExpellant gas containers shall be fitted to the pipework or the manifold by flexible connectors in accordance withEN 12094-8.When more than one container is used, each flexible connection to a manifold shall be fitted with a non-returnvalve in accordance with EN 12094-13:2001.7
Pressure gaugesPressure gauges shall be in accordance with Table 1.Table 1 - Pressure gaugesParameterPressure regulatorsExpellant gas containerAdownstreamBupstreamscale0 to 1,5 times of the working pressuregraduation1 bar5 bar10 baraccuracy> 1,6%> 2%± 5%diameter>38 mm8
Pressure regulators8.1
GeneralPowder containers with a capacity of more than 100 kg shall be fitted with a pressure regulator. A pressureregulator shall be fitted to build-up the necessary expellant gas pressure in the powder container and tomaintain the working pressure of the powder system. The minimum setting of the pressure regulator shall be10 % lower than the maximum working pressure. The pressure gauge shall be installed before (pressuregauge A) and after (pressure gauge B) the pressure regulator and in accordance with Table 1.8.2
MaterialAll mechanical parts of the pressure regulator for the powder discharge valves and powder selector valvesshall be made of metal or other materials which have at least the same performance characteristics.Non-metallic materials and elastomers used in the pressure regulator shall not alter so that the operation isimpaired before or after any of the tests. All materials shall be resistant to the media with which they come intocontact.If copper alloy is used the component shall be tested in accordance with annex J.
Page 10EN 12416-1:20018.3
Corrosion resistanceThe pressure regulator shall be tested in accordance with annex I.8.4
Resistance to internal pressureThe regulator shall be tested in accordance with annex B.8.5
FlowThe pressure regulator shall be designed so that the expellant gas flow ensures the required powder dischargein at least the minimum discharge time.9
Actuators9.1
General9.1.1
MaterialsAll mechanical parts of the actuator for the powder discharge valves and powder selector valves shall be madeof metal or other materials which have at least the same performance characteristics.Non-metallic materials and elastomers used in the actuator shall not alter so that the operation is impairedbefore or after any of the tests. All materials shall be resistant to the media with which they come into contact.If copper alloy is used the component shall be tested in accordance with annex J.9.1.2
Vibration resistanceThe valve assembly including accessories and actuator shall not operate or be damaged when tested inaccordance with annex G.9.1.3
Temperature resistanceThe actuator shall be tested in accordance with annex E and F.9.1.4
Operational reliabilityActuators shall operate together with the associated valve and shall be tested in accordance with annex H.9.1.5
Corrosion resistanceActuators shall operate together with the associated valve and shall be tested in accordance with annex I.9.1.6
Operating forceCorresponding to an opening time of maximum 1 s the effective force of the actuator shall be at least two timesand in the case of pyrotechnic actuators at least three times the force necessary to open the valve under themost severe conditions, when the component is tested as specified in annex C.9.1.7
Electric switch and monitoring equipmentThe degree of protection for enclosures of the switch and monitoring equipment as well as solenoid coils shallcomply with class IP 54 according to EN 60529:1991.9.2
Solenoid operated type actuators9.2.1
The degree of protection for enclosures shall conform to a minimum classification of IP 54 in accordancewith EN 60529:1991.9.2.2
The solenoid operated type actuators shall be tested in accordance with annexes C, D, E, F, G, H and I.
Page 11EN 12416-1:20019.3
Pneumatic powered actuatorsPneumatic actuators of expellant gas containers shall comply with the requirements of prEN 12094-4:1998.Pneumatic actuators of powder container main isolating valves and selector valves shall comply with therequirements of EN 12094-5:2000 but shall operate in a maximum actuating time of 5 s. Pneumatic poweredactuators shall be tested in accordance with annexes C, D, E, F, G, H and I.9.4
Mechanical operated actuatorsThe drop distance shall be at least 75 mm greater than the distance required to open the valve.Springs acting as the prime mover in the release device shall be free to complete their full travel withoutimpedance.9.5
Pyrotechnic actuatorsThe actuator shall be tested in accordance with annex C, D, E, F, G, H and I.The manufacturer shall specify:- minimum all-fire current and its minimum duration and the form of the signal; and- maximum monitoring current; and- range of voltage; and- maximum storage time under specified storage conditions; and- maximum life time under stand-by conditions (50°C and 70% relative humidity)In addition data shall be provided by the manufacturer to show that:a) the failure rate of the device in the energy transfer path does not exceed 1 in 100 000 at therecommended firing current; andb) actuators will achieve the required power output after being subjected to a 90-day ageing test at a testtemperature of (90 ± 2) °C; andc) the power output of the actuator at the end of its service life as recommended by the manufacturer willbe not less than three times that required to operate the valve at the most disadvantageous operatingconditions.9.6
Manually released actuatorsThe manually released actuators shall be protected against unintentional use.The force required to operate a manually released actuator shall not exceed:a)
150 N for hand operated controls; orb)
50 N for finger pull operated controls; orc)
10 N for finger push operated controls;The movement of the release shall not exceed 300 mm to achieve actuation. The manual remote release shallbe tested together with the actuator in accordance with C.1.5.9.7
Use in combinationActuators for use in combination shall comply with the individual requirements of the appropriate clauses whentested as a combined assembly.
Page 12EN 12416-1:200110
Main isolating valve and selector valve10.1
GeneralThe main isolating valves and the selector valve shall have a mechanical indicator to show the open andclosed position.10.2
MaterialAll mechanical parts of main isolating valves and selector valves shall be made of metal or other materialswhich have at least the same performance characteristics.Non-metallic materials and elastomers used in the main isolating valve and selector valve shall not alter so thatthe operation is impaired before or after any of the tests. All materials shall be resistant to the media with whichthey come into contact.If copper alloy is used the component shall be tested in accordance with annex J.10.3
Temperature resistanceMain isolating valves and selector valves shall be tested in accordance with annex E and F.10.4
Resistance to pressureThe valve with actuator shall be tested in accordance with annex B.10.5
Flow characteristicsThe free flow cross section of the valve shall be not less than 95 % of the area given by the inlet pipe nominaldiameter.The flow characteristic of the valve shall be stated by the manufacturer, either as an equivalent length of pipe,equal to the inlet pipe nominal diameter or as a flow resistance coefficient.The valves shall be designed so that during operation no part of the valve or its components shall be ejectedoutside of the confines of the valve or into the discharge pipework.10.6
Corrosion resistanceThe main isolating valves and selector valves shall be tested in accordance with annex I.10.7
Vibration resistanceThe valve assembly including accessories and actuator shall not operate or be damaged when tested inaccordance with annex G.10.8
Operating forceThe effective force of the actuator shall - under the most unfavourable conditions - be at least twice the forcerequired to operate the valve.The valves shall be tested in accordance with annex C.
Page 13EN 12416-1:200111
Nozzles11.1
MaterialThe nozzle and internal parts shall be made of metal or material with equivalent properties.The nozzle protective covers may be made of other materials.11.2
Resistance to pressureThe nozzle shall be tested in accordance with annex B.11.3
Resistance to heatThe nozzle shall be tested in accordance with F.2.11.4
Corrosion resistanceThe nozzles shall be tested in accordance with annex I and if for nozzles copper alloys are used they shall betested in addition in accordance with annex J.11.5
Orifice diameterThe diameter of each orifice shall be not less than 7 mm.11.6
ConnectionsNozzles shall be either threaded or flanged.11.7
Nozzle coversThe nozzle covers shall be tested in accordance with C.4. Provisions shall be made to prevent the covercausing injury or damage when it is blown off.11.8
Discharge characteristics11.8.1
Total
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