SIST EN 14470-2:2007

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EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14470-2August 2006ICS 13.220.40; 71.040.10 English VersionFire safety storage cabinets - Part 2: Safety cabinets forpressurised gas cylindersArmoires de stockage de sécurité incendie - Partie 2 :Armoires de stockage de sécurité pour bouteilles de gazcompriméFeuerwiderstandsfähige Lagerschränke - Teil 2:Sicherheitsschränke für DruckgasflaschenThis European Standard was approved by CEN on 21 July 2006.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 Central Secretariat 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 Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, 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 STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2006 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14470-2:2006: E



EN 14470-2:2006 (E) 2 Contents Page Foreword.3 Introduction.4 1 Scope.5 2 Normative references.5 3 Terms and Definitions.5 4 Classification.6 5 Construction.6 5.1 Fire protection.6 5.2 Ventilation.6 5.3 Gas cylinder restraining.7 5.4 Insertion and removal of
pressurised gas cylinders.7 5.5 Installation of gas pipelines (for gas cylinders in use).7 5.6 Installation of electric cables (where appropriate).7 6 Fire resistance.7 7 Information to be supplied.7 8 Manufacturer's marking and labelling.8 Annex A (normative)
Type G testing to determine fire resistance.9 A.1 Principle.9 A.2 Testing apparatus and test methods.9 A.2.1 Furnace.9 A.2.2 Measuring equipment.9 A.2.3 Weighing system.9 A.3 Test models.9 A.3.1 Quantity and description of test models.9 A.3.2 Preliminary examination of the test model.10 A.4 Preparation of fire test.10 A.4.1 Safety cabinet.10 A.4.2 Installation of test model.10 A.4.3 Temperature measuring device placement.11 A.4.4 Temperature measuring device placement in the fire room.11 A.5 Fire testing procedure.11 A.6 Test report.11 Annex B (informative)
Approval regarding construction alterations.15 Bibliography.16



EN 14470-2:2006 (E) 3 Foreword This document (EN 14470-2:2006) has been prepared by Technical Committee CEN/TC 332 “Laboratory equipment”, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February 2007, and conflicting national standards shall be withdrawn at the latest by February 2007. EN 14470, Fire safety storage cabinets, consists of the following parts:  Part 1: Safety storage cabinets for flammable liquids  Part 2: Safety cabinets for pressurised gas cylinders According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, 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.



EN 14470-2:2006 (E) 4 Introduction This European standard describes the design and test criteria for safety cabinets used by laboratories to store pressurised gas cylinders at normal room temperature. The cabinet is designed and constructed to ensure that in the event of fire, the contents of the cabinet do not contribute any additional risks or spread the fire for at least 15 minutes. The cabinet is also designed and constructed to ventilate minor gas leakage within the cabinet. Testing the cabinet under fire conditions is a normative part of this standard and the procedures and interpretation of the tests are described in detail. The fire rating allows time for personnel to leave and fire fighters to enter the area before the pressurised gas cylinders become unstable.



EN 14470-2:2006 (E) 5 1 Scope This European standard is a product specification, giving performance requirements for fire safety cabinets used for storing pressurised gas cylinders. It is applicable to cabinets with a total internal volume suitable to store pressurised gas cylinders with a total volume not exceeding 220 l, including cylinders of purging gases. NOTE 1 This means that up to four gas cylinders of 50 l or up to three gas cylinders of 70 l can be stored in a single cabinet. NOTE 2 It is intended that the pressurised gas cylinders can be in use while in the cabinet. NOTE 3 Attention is drawn to national regulations which can apply with regard to the storage and use of pressurised gas cylinders. NOTE 4 The safety cabinet can be free standing, restrained to a wall or mounted on wheels or castors.
This standard is not applicable to brick enclosures, walk-in storage rooms or cabinets which do not take their weight on their base. Requirements are given in respect to the construction of the cabinet and its capacity to resist fire conditions on the outside. A type test is included, which is based on the already existing fire resistance (heating curve) tests given in EN 14470-1. The tests described in this European Standard are type tests (for the storage of flammable liquids EN 14470-1 is applicable – the criteria for failure are different – see Annex A).
2 Normative references The following referenced documents are indispensable for the application of this European Standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1363-1:1999, Fire resistance tests — Part 1: General requirements EN ISO 13943:2000, Fire safety — Vocabulary (ISO 13943:2000) ISO 3864 (all parts), Graphical symbols - Safety colours and safety signs 3 Terms and Definitions For the purposes of this document, the terms and definitions given in EN ISO 13943:2000 and the following apply. 3.1 type specimen of a design manufactured with the characteristics intended for serial production 3.2 type testing conformity testing on the basis of one or more specimens of product representative of the production



EN 14470-2:2006 (E) 6 4 Classification A gas cylinder cabinet shall be classified as one of the Types listed in Table 1. Table 1 — Fire safety cabinet for pressurised gas cylinder Type classification Type Time taken for Ta to rise by 50 K min Test according to EN 1363-1:1999 Ventilation connection facility required G15 ≥ 15 Yes Yes G30 ≥ 30 Yes Yes G60 ≥ 60 Yes Yes G90 ≥ 90 Yes Yes a
T is the temperature taken on the surface of the gas cylinder valve spanner flat. 5 Construction 5.1 Fire protection The cabinet shall be designed and constructed to ensure that, in the event of a fire, the contents of the cabinet do not contribute any additional risks or spread the fire for at least 15 minutes. 5.2 Ventilation 5.2.1 Cabinets shall be equipped with openings for inlet and exhaust air, which allows for connection of an exhaust air system to the cabinet. In a ventilated cabinet in which ventilation is taking place, with the doors closed, latched and locked, the following extraction rates shall apply:  when using flammable and fire supporting gas, at least 10 air changes of the cabinet's volume per hour;  when using toxic gas, at least 120 air changes of the cabinet's volume per hour. Under the above conditions the pressure drop shall not exceed 150 Pa. The ventilation system shall maintain a lower pressure in the cabinet than in the surrounding atmosphere. Ventilation shall take place on the top and bottom of the cabinet. Design of the air circulation system within the cabinet shall ensure adequate purging from minor leakage.
This shall be tested by visual inspection and by measuring the air flow and pressure drop while the cabinet is empty. NOTE The inlet pressure drop and the number of air changes have been chosen to provide purging efficiency.
5.2.2 In the event of a fire, the inlet and exhaust vents shall close automatically. The vents' closing system shall be tested as part of the fire-resistance test in Annex A.



EN 14470-2:2006 (E) 7 5.3 Gas cylinder restrai
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