【正文】 .............................................................................................8 Annex A (normative) Type G testing to determine fire resistance.................................................................9 Principle ..................................................................................................................................................9 Testing apparatus and test methods ...................................................................................................9 Furnace ...................................................................................................................................................9 Measuring equipment............................................................................................................................9 Weighing system ...................................................................................................................................9 Test models ............................................................................................................................................9 Quantity and description of test models .............................................................................................9 Preliminary examination of the test model .......................................................................................10 Preparation of fire test ........................................................................................................................10 Safety cabi.......................................................................................................................................10 Installation of test model ....................................................................................................................10 Temperature measuring device placement.......................................................................................11 Temperature measuring device placement in the fire room ...........................................................11 Fire testing procedure .........................................................................................................................11 Test report ............................................................................................................................................11 Annex B (informative) Approval regarding construction alterations .........................................................15 Bibliography ......................................................................................................................................................16 EN 144702:2020 (E) 3 Foreword This document (EN 144702:2020) 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 2020, and conflicting national standards shall be withdrawn at the latest by February 2020. EN 14470, Fire safety storage cabis, consists of the following parts: ? Part 1: Safety storage cabis for flammable liquids ? Part 2: Safety cabis for pressurised gas cylinders According to the CEN/CENELEC Internal Regulations, the national standards anizations 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 144702:2020 (E) 4 Introduction This European standard describes the design and test criteria for safety cabis used by laboratories to store pressurised gas cylinders at normal room temperature. The cabi is designed and constructed to ensure that in the event of fire, the contents of the cabi do not contribute any additional risks or spread the fire for at least 15 minutes. The cabi is also designed and constructed to ventilate minor gas leakage within the cabi. Testing the cabi 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 bee unstable. EN 144702:2020 (E) 5 1 Scope This European standard is a product specification, giving performance requirements for fire safety cabis used for storing pressurised gas cylinders. It is applicable to cabis 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 cabi. NOTE 2 It is intended that the pressurised gas cylinders can be in use while in the cabi. 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 cabi can be free standing, restrained to a wall or mounted on wheels or castors. This standard is not applicable to brick enclosures, walkin storage rooms or cabis which do not take their weight on their base. Requirements are given in respect to the construction of the cabi 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 144701. The tests described in this European Standard ar