Fixed firefighting systems - Components for gas extinguishing systems - Part 11: Requirements and test methods for mechanical weighing devices

This European Standard specifies requirements and test methods for mechanical weighing devices for continuous monitoring of containers of CO2-, Inert Gas- or Halocarbon Gas-Fire Extinguishing Installations.
This European Standard does not cover weighing devices for non-transportable containers which are filled and refilled on site, e.g. CO2-low-pressure containers.

Ortsfeste Brandbekämpfungsanlagen - Bauteile für Löschanlagen mit gasförmigen Löschmitteln - Teil 11: Anforderungen und Prüfverfahren für mechanische Wägeeinrichtungen

Diese Europäische Norm legt Anforderungen und Prüfverfahren für mechanische Wägeeinrichtungen zur dauernden Überwachung von Behältern für CO2-Feuerlöschanlagen, Inertgas-Feuerlöschanlagen und Feuerlöschanlagen mit halogenierten Kohlenwasserstoffen fest.
Diese Europäische Norm gilt nicht für Wägeeinrichtungen für ortsfeste Behälter, die vor Ort befüllt und wiederbefüllt werden, z. B. CO2-Niederdruckbehälter.

Installations fixes de lutte contre l'incendie - Eléments constitutifs pour installations d'extinction à gaz - Partie 11: Exigences et méthodes d'essai pour dispositifs de pesée mécaniques

La présente Norme européenne décrit les exigences et les méthodes d'essai applicables aux dispositifs de pesée mécaniques pour la surveillance continue de réservoirs de systèmes d'extinction d'incendie à CO2, à gaz inerte ou à gaz halocarboné.
La présente Norme européenne ne s'applique pas les dispositifs de pesée non transportables qui sont remplis et re-remplis sur site, par exemple les réservoirs à CO2 basse pression.

Vgrajeni gasilni sistemi - Sestavni deli sistemov za gašenje s plinom - 11. del: Zahteve in preskusne metode za mehanske naprave za tehtanje

General Information

Status
Published
Publication Date
25-Mar-2003
Current Stage
9093 - Decision to confirm - Review Enquiry
Completion Date
26-Jun-2008

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Vgrajeni gasilni sistemi - Sestavni deli sistemov za gašenje s plinom - 11. del: Zahteve in preskusne metode za mehanske naprave za tehtanjeOrtsfeste Brandbekämpfungsanlagen - Bauteile für Löschanlagen mit gasförmigen Löschmitteln - Teil 11: Anforderungen und Prüfverfahren für mechanische WägeeinrichtungenInstallations fixes de lutte contre l'incendie - Eléments constitutifs pour installations d'extinction a gaz - Partie 11: Exigences et méthodes d'essai pour dispositifs de pesée mécaniquesFixed firefighting systems - Components for gas extinguishing systems - Part 11: Requirements and test methods for mechanical weighing devices13.220.10Gašenje požaraFire-fightingICS:Ta slovenski standard je istoveten z:EN 12094-11:2003SIST EN 12094-11:2003en01-maj-2003SIST EN 12094-11:2003SLOVENSKI

STANDARD
SIST EN 12094-11:2003

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12094-11March 2003ICS 13.220.20English versionFixed firefighting systems - Components for gas extinguishingsystems - Part 11: Requirements and test methods formechanical weighing devicesInstallations fixes de lutte contre l'incendie - Elémentsconstitutifs pour installations d'extinction à gaz - Partie 11:Exigences et méthodes d'essai pour dispositifs de peséemécaniquesOrtsfeste Brandbekämpfungsanlagen - Bauteile fürLöschanlagen mit gasförmigen Löschmitteln - Teil 11:Anforderungen und Prüfverfahren für mechanischeWägeeinrichtungenThis European Standard was approved by CEN on 7 November 2002.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,Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and UnitedKingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36

B-1050 Brussels© 2003 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12094-11:2003 ESIST EN 12094-11:2003

EN 12094-11:2003 (E)2ContentspageForeword......................................................................................................................................................................3Introduction.................................................................................................................................................................51Scope..............................................................................................................................................................62Terms and definitions....................................................................................................................................63Requirements.................................................................................................................................................73.1Compliance.....................................................................................................................................................73.2Design.............................................................................................................................................................73.3Function at normal temperature...................................................................................................................73.4Function at high and low temperature.........................................................................................................73.5Overload..........................................................................................................................................................73.6Corrosion........................................................................................................................................................73.7Documentation...............................................................................................................................................74Test methods..................................................................................................................................................84.1Test conditions..............................................................................................................................................84.2Test samples and order of tests...................................................................................................................84.3Compliance.....................................................................................................................................................94.4Function at normal temperature...................................................................................................................94.5Function at high and low temperature.......................................................................................................104.6Overload........................................................................................................................................................104.7Corrosion......................................................................................................................................................105Marking.........................................................................................................................................................116Evaluation of conformity.............................................................................................................................116.1General..........................................................................................................................................................116.2Initial type testing........................................................................................................................................126.3Factory production control (FPC)..............................................................................................................12Annex ZA (informative)

Clauses of this European Standard addressing essential requirements orother provisions of EU-Directives..............................................................................................................16Bibliography..............................................................................................................................................................19SIST EN 12094-11:2003

EN 12094-11:2003 (E)3ForewordThis document (EN 12094-11:2003) has been prepared by CEN/TC 191 "Fixed firefighting system", the secretariatof which is held by BSI.This European Standard shall be given the status of a national standard, either by publication of an identical text orby endorsement, at the latest by September 2003, and conflicting national standards shall be withdrawn at thelatest by September 2005.This document has been prepared under a mandate given to CEN by the European Commission and the EuropeanFree 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 document.This part of EN 12094 is one of a number of European Standards prepared by CEN/TC 191 covering componentsfor gas extinguishing systems.They are included in a series of European Standards planned to cover:- gas extinguishing systems (EN 12094);- sprinkler systems (EN 12259:1999+A1 and EN 12845);- powder systems (EN 12416);- explosion protection systems (EN 26184);- foam systems (EN 13565);- hose systems (EN 671);- smoke and heat control systems (EN 12101);- water spray systems1).This European Standard has the general title "Fixed firefighting systems – Components for gas extinguishingsystems" and will consist of the following parts:- Part 1: Requirements and test methods for electrical automatic control and delay devices- Part 2: Requirements and test methods for non-electrical automatic control and delay devices- Part 3: Requirements and test methods for manual triggering and stop devices- Part 4: Requirements and test methods for high pressure container valve assemblies and their actuators- Part 5: Requirements and test methods for high and low pressure selector valves and their actuators for CO2systems- Part 6: Requirements and test methods for non-electrical disable devices for CO2 systems

1)Under preparation.SIST EN 12094-11:2003

EN 12094-11:2003 (E)4- Part 7: Requirements and test methods for nozzles for CO2 systems- Part 8: Requirements and test methods for flexible connectors for CO2 systems- Part 9: Requirements and test methods for special fire detectors- Part 10: Requirements and test methods for pressure gauges and pressure switches- Part 11: Requirements and test methods for mechanical weighing devices- Part 12: Requirements and test methods for pneumatic alarm devices- Part 13: Requirements and test methods for check valves and non-return valves- Part 16: Requirements and test methods for odorizing devices for CO2 low pressure systems- Part 17: Pipe hangers- Part 20: Requirements and test methods for the compatibility of componentsAccording 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, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,Slovakia, Spain, Sweden, Switzerland and the United Kingdom.SIST EN 12094-11:2003

EN 12094-11:2003 (E)5IntroductionIt has been assumed in the preparation of this European Standard that the execution of its provisions is entrusted toappropriately qualified and experienced people.All pressure data in this European Standard are given as gauge pressures in bar, unless otherwise stated.NOTE1 bar = 105 N m-2 = 100 kPa.SIST EN 12094-11:2003

EN 12094-11:2003 (E)61 ScopeThis European Standard specifies requirements and test methods for mechanical weighing devices for continuousmonitoring of containers of CO2-, Inert Gas- or Halocarbon Gas-Fire Extinguishing Installations.This European Standard does not cover weighing devices for non-transportable containers which are filled andrefilled on site, e.g. CO2-low-pressure containers.2 Terms and definitionsFor the purposes of this European Standard, the following terms and definitions apply.2.1CO2-high-pressure installationfire extinguishing installation in which the CO2 is stored at ambient temperature. For example, the pressure of theCO2 in storage is pabs = 58,6 bar at 21 °C2.2CO2-low-pressure installationfire extinguishing installation in which the CO2 is stored at low temperature, normally – 19 °C to –21 °C2.3gross loadmass of a container filled with extinguishing medium including valve and actuator2.4fill ratiothe mass of extinguishing medium related to the nominal internal volume of a container expressed in kilograms perlitre2.5halocarbon gasextinguishing agent that contains as primary components one or more organic compounds containing one or moreof the elements fluorine, chlorine, bromine or iodine2.6halocarbon gas installationfire extinguishing installation in which the halocarbon gas is stored at ambient temperature2.7inert gasnon liquefied gas or mixture of gases which extinguish the fire mainly by reducing the oxygen-concentration in theprotected zone, e.g. Argon, Nitrogen or CO2 or mixtures of these gases2.8inert gas installationfire extinguishing installation in which the inert gas is stored at ambient temperature2.9net loadmass of the extinguishing medium in a containerSIST EN 12094-11:2003

EN 12094-11:2003 (E)73 Requirements3.1 ComplianceThe test sample shall comply with the documentation (drawings, parts lists, description of functions, operating andinstallation instructions) when assessed in accordance with 4.3.3.2 DesignA weighing device may be designed for monitoring containers of various sizes, with various fill ratios or with variousgases.NOTE 1Different combinations of size, fill ratio (where applicable) and type of gas result in different values for gross and netload.For each combination of gross load and net load, which the weighing device is used for, the manufacturer shallspecify:a) type of gas;b) nominal internal volume of the container;c) net load;d) gross load;e) fill ratio, if applicable.A weighing device shall be adjustable to give a loss indication when a mass loss between 5 % and 10 % of the netload occurs. The loss indication shall be maintained until corrective action is taken.NOTE 2Normal building movement should not generate a false loss indication.3.3 Function at normal temperatureA weighing device shall respond to a mass loss of between 5 % and 10 % of the net load, when tested inaccordance with 4.4.1.3.4 Function at high and low temperatureA weighing device shall respond to a mass loss of between 5 % and 10 % of the net load, when tested at – 20 °Cand + 50 °C in accordance with 4.5.3.5 OverloadA weighing device shall respond to a mass loss of between 5 % and 10 % of the net load, when tested inaccordance with 4.4.2, after being loaded with twice the maximum gross load in accordance with 4.6.3.6 CorrosionA weighing device shall respond to a mass loss of between 5% and 10% of the net load, when tested inaccordance with 4.4.2, after being subjected to the corrosive atmosphere in accordance with 4.7.3.7 Documentation3.7.1The manufacturer shall prepare and maintain documentation.SIST EN 12094-11:2003

EN 12094-11:2003 (E)83.7.2The manufacturer shall prepare installation and user documentation, which shall be submitted to the testingauthority together with the test sample(s). This documentation shall comprise at least the following:a) a general description of the component, including a list of its features and functions;b) a technical specification including:1) the information mentioned in 3.2;2) sufficient information to permit an assessment of the compatibility with other components of the system (ifapplicable e.g. mechanical, electrical or software compatibility);c) installation instructions including mounting instructions;d) operating instructions;e) maintenance instructions;f) routine testing instructions, if appropriate.3.7.3The manufacturer shall prepare design documentation, which shall be submitted to the testing authoritytogether with the test sample(s). This documentation shall include drawings, parts lists, block diagrams (ifapplicable), circuit diagrams (if applicable) and a functional description to such an extent that compliance with thisEuropean Standard may be checked and that a general assessment of the design is made possible.4 Test methods4.1 Test conditionsThe component shall be assembled for test as specified in the documentation. The tests shall be carried out at atemperature of (25 ± 10) °C, except when otherwise specified for a particular test.The tolerance for all test parameters is 5 %, unless otherwise stated.4.2 Test samples and order of testsFor the tests one sample is needed. The order of tests is shown in Table 1.SIST EN 12094-11:2003

EN 12094-11:2003 (E)9Table 1 — Order of testsOrder of testTest14.3
Compliance24.4.1
Function at normal temperature34.5
Function at high and low temperature44.6
Overload54.4.2
Function at normal temperature64.7
Corrosion74.4.2

Function at normal temperature4.3 ComplianceThis test relates to the requirements of 3.1.A visual and measurement check shall be made to determine that the test sample corresponds to the description inthe drawings, parts lists, description of functions, operating and installation instructions.4.4 Function at normal temperature4.4.1This test relates to the requirements of 3.3.If a weighing device is specified by the manufacturer for one combination of gross load and net load, the followingsequence a) to d) shall be conducted with the specified gross load and net load.If a weighing device is specified by the manufacturer for several combinations of gross load and net load, thefollowing sequence a) to d) shall be conducted with the following combinations of gross load and net load:-

maximum gross load, maximum net load;-
maximum gross load, minimum net load;-
medium gross load, medium net load;-
minimum gross load, maximum net load;-

minimum gross load, minimum net load.a) Load the test sample with the gross load including an amount of water. The mass of the water shall be at least15 % of the net load;b) Adjust the test sample in accordance with the installation instructions of the manufacturer to correspond to theactual test load applied;c) Carry out the following steps:1) decrease the test load corresponding to a loss of 5 % of the net load by draining water in a period of 2 minto 5 min into a collecting container;2) stop when loss is indicated;SIST EN 12094-11:2003

EN 12094-11:2003 (E)103) measure and record the mass or the volume of the water collected (permissible error ± 0,5 % of the netload; 1 l water = 1 kg);4) add the water to the load again and repeat steps c) 1) to c) 3) twice.d) If one or more of the three values is not in the range between 5 % and 10 % of the net load, repeat steps b)and c), carrying out step c) five times (all five values shall be in the range between 5 % and 10 % of the netload).4.4.2This test relates to the requirements of 3.4, 3.5 and 3.6.If a weighing device is specified by the manufacturer for one combination of gross load and net load, the sequencea) to d) of 4.4.1 shall be conducted with the specified gross load and net load.If a weighing device is specified by the manufacturer for several combinations of gross load and net load, thesequence a) to d) of 4.4.1 shall be conducted with the following combinations of gross load and net load:-

maximum gross load, minimum net load;-

minimum gross load, minimum net load.4.5 Function at high and low temperatureThis test relates to the requirements of 3.4.Condition the test sample for at least 4 h at the intended test temperature, i.e. at:a) (0220--) °C for low temperature;b) (3050++) °C for high temperature.Conduct the test described in 4.4.2 at both test temperatures.For the low test temperature a suitable liquid for use at this temperature shall be used instead of water.4.6 OverloadThis test relates to the requirements of 3.5.The test sample shall be statically loaded with twice the maximum gross load for 15 min.The force shall be applied in any way which represents the intended normal use.Conduct the test as described in 4.4.2.4.7 CorrosionThis test relates to the requirements specified in 3.6.A specimen shall be suspended freely in its normal installation attitude.The test set-up comprises a container of 5 l volume, made of heat-resistant glass and with a corrosion-resistantcover which is shaped to prevent condensate dripping onto the specimen. (If a container 10 l in volume is used, thequantities of chemicals given below shall be doubled.) The container is heated electrically and the side walls arecooled with water. A thermostat regulates the heating so as to maintain a temperature of approximately 45 °Cinside the container. During testing water is passed through a cooling coil wrapped around the container; it shallflow fast enough that its temperature at the discharge point is below 30 °C.SIST EN 12094-11:2003

EN 12094-11:2003 (E)11The combination of heating and cooling is designed to ensure that vapours will condense on the surface of thespecimen. The sulphur dioxide atmosphere is generated in the 5 l container with a solution of 20 g of sodiumthiosulphate (Na2S2O3 * 5H2O) in 500 cm3 of distilled water, to which 20 cm3 of dilute sulphuric acid is added daily.The dilute sulphuric acid comprises 128 cm3 of one molar sulphuric acid (H2SO4) dissolved in 1 l of distilled water.The test specimens shall be removed from the container after eight days; the container shall be cleaned. Then theprocedure described above is repeated for a further period of eight days.After a total of 16 days, the specimen is removed from the container and allowed to dry for seven day

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