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1、BRITISH STANDARD BS 5499-2: 1986 Fire safety signs, notices and graphic symbols Part 2: Specification for self-luminous fire safety signs Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 09:58:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5499-2:1986 This British Standard, having been prepa
2、red under the direction of the Fire Standards Committee, was published under the authority of the Board of BSI and comes into effect on 28 November 1986 BSI 12-1998 The following BSI references relate to the work on this standard: Committee reference FSM/11 Draft for comment 84/39704 DC ISBN 0 580 1
3、5198 0 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Fire Standards Committee (FSM/-) to Technical Committee FSM/11, upon which the following bodies were represented: Association of British Theatre Technicians Association of Manufactur
4、ers Allied to the Electrical and Electronic Industry (BEAMA Ltd.) British Bingo Association British Entertainment and Dancing Association British Sign Association Chartered Institution of Building Services Engineers Chartered Insurance Institute Chemical Industries Association Chief and Assistant Ch
5、ief Fire Officers Association Defence Manufacturers Association Department of Health and Social Security Department of the Environment (Property Services Agency) Department of the Environment (Building Research Establishment, Fire Research Station) Fire Extinguishing Trades Association Fire Fighting
6、 Vehicle Manufacturers Association Fire Protection Association Guild of Architectural Ironmongers Health and Safety Executive Home Office Institution of Fire Engineers Lighting Industry Federation Ltd. National Radiological Protection Board Royal Institute of British Architects Society of Industrial
7、 Artists and Designers Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 09:58:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5499-2:1986 BSI 12-1998i Contents Page Committees responsibleInside front cover Forewordii 1Scope1 2D
8、efinitions1 3General design and construction1 4Performance1 5Mounting2 6Identification and labelling2 Appendix A Methods of test for performance3 Appendix B Flammability test3 Figure 1 Glow-wire with thermocouple5 Figure 2 Example of a suitable glow-wire test apparatus6 Publications referred toInsid
9、e back cover Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 09:58:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5499-2:1986 ii BSI 12-1998 Foreword This Part of BS 5499 has been prepared under the direction of the Fire Standards Committee. It constitutes a revision of BS 4218:1978, which
10、it supersedes and which is withdrawn. The re-numbering has been carried out in order to align this Part with other Parts of BS 5499 dealing with fire and emergency safety signs. A revision of BS 2560, dealing with internally illuminated signs is also being carried out, and this will form Part 3 of B
11、S 5499. This Part of BS 5499 specifies requirements for self-luminous signs that are independent of any external source of energy. It has been accepted for use in buildings where it is necessary or desirable that indicating signs be illuminated, e.g. bingo halls, ballrooms and other places of public
12、 entertainment. It should be noted that no effective illuminance is emitted from this sign. This Part of BS 5499 differs from BS 4218:1978 in that it applies solely to the construction and performance of this type of sign. The previous edition dealt with graphics requirements, specifically those for
13、 the word “EXIT”. All graphics requirements are now to be included in BS 5499-1. The changes will be given in an amendment to Part 1. This Part of BS 5499 is generally in accordance with the principles and criteria contained in the Nuclear Energy Agency document for Radiation Protection Standards fo
14、r Gaseous Tritium Light Devices1). While properly constructed signs such as those specified in this Part of BS 5499 constitute no significant hazard or risk to personal safety, it has to be recognized that if any sign containing a radioactive gaseous isotope is substantially damaged, the release of
15、the radioactive gas from the sign could give rise to a temporary exposure of personnel, particularly in a confined space, during the period of dispersal of the gas. Moreover, if such a release occurred, part, or all of the sign would no longer be self-energized and might no longer fulfil its purpose
16、 of indication. It is accordingly desirable that all radioactive signs should be manufactured in accordance with this Part of BS 5499, which adequately provides against all personal hazard if the sign is handled with reasonable care during transit and installation. The requirements specified herein
17、are intended to ensure that, in a sign complying with this Part of BS 5499, tritium cannot be released from the gaseous tritium light source(s) GTLS(s) under the most severe conditions that are likely to be encountered in the normal handling of the sign. IMPORTANT NOTEThe use and disposal of fire sa
18、fety signs containing tritium is covered by Exemption Order 1985 No. 1047 (The Radioactive Substances (Gaseous Tritium Light Devices) Exemption Order 1985). Under this order, conditional exemption from registration would be given for signs that comply with this Part of BS 5499, that are securely fix
19、ed or attached to premises, or if stored, that are stored for not more than 1 month, and if certain other conditions are met. The manufacturer of the sign should furnish the purchaser with the necessary details. A British Standard does not purport to include all the necessary provisions of a contrac
20、t. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 6, an inside back cover
21、 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. 1) Published by the Organization for Economic Co-operation and Development, 1973. Licensed Copy: sheffieldun sheff
22、ieldun, na, Fri Dec 01 09:58:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5499-2:1986 BSI 12-19981 1 Scope This Part of BS 5499 specifies requirements for the construction and performance of a type of safety sign which is self-energized in respect of luminosity, and which requires no external so
23、urce of power, and is rigidly fixed in position. It is not intended to apply to smaller signs that may be used in aircraft. NOTEThe titles of the publications referred to in this standard are listed on the inside back cover. 2 Definitions For the purposes of this Part of BS 5499, the following defin
24、itions apply. 2.1 gaseous tritium light source (GTLS) a sealed glass container filled with gaseous tritium and coated internally with a phosphor 2.2 gaseous tritium light device (GTLD) an instrument, piece of equipment, article or subassembly containing one or more GTLS(s) 2.3 sign equipment includi
25、ng graphics (see 2.4) which are luminously self-energized either by GTLD(s) protected within an outer assembly, or by a GTLD alone 2.4 graphics pictures, symbols, letters, figures or a combination of any of these NOTEThe requirements for graphics will be given in an amendment to BS 5499-1. 3 General
26、 design and construction 3.1 Construction of a GTLD 3.1.1 A GTLD shall be so constructed that it cannot be dismantled without the destruction of its enclosure. 3.1.2 The GTLD shall be vented to the atmosphere through two holes of between 2 mm and 3 mm diameter. These holes shall be on the sides whic
27、h are closest to the vertical, and placed such that no GTLS is touched by the rod when tested in accordance with A.2 a). 3.1.3 No individual GTLS shall contain more than 80 GBq (2.16 Ci) of tritium. 3.2 Construction of a sign 3.2.1 Where the GTLD is protected by an outer assembly, the GTLD(s) shall
28、not be accessible or removable from the sign after mounting without the use of special tools and procedures. These tools and procedures shall be declared by the manufacturer. 3.2.2 The sign shall be vented to the atmosphere through holes of between 2 mm and 3 mm diameter, placed such that no GTLS is
29、 touched by the rod when tested in accordance with A.2 a). 3.2.3 The front surface of the sign facing the observer shall have a matt or semi-matt surface. 3.2.4 The total activity of tritium in the sign shall not exceed 1 TBq (27 Ci). 4 Performance 4.1 Physical characteristics When tested in accorda
30、nce with A.1 and A.2, the sign shall show no visual structural failure affecting the mechanical strength or integrity of the sign, or visually apparent loss of light output. 4.2 Luminance When tested in accordance with A.1 and A.3, within 1 month of manufacture, the full stencil outline of each grap
31、hic shall be illuminated, and the luminance at the surface of a sign at any local area of illumination shall be not less than 0.51 cd/m2. For lettered graphics, the variation in luminance between one local area and another shall not exceed a ratio of three to two. For all other graphics, the variati
32、on in luminance between local areas shall not exceed a ratio of five to two. The legibility requirements of the sign, over the lifetime indicated in 6.3, shall be in accordance with BS 5499-1. 4.3 Dose rate The radiation dose rate at the surface of the assembled sign shall not exceed 2.5 Gy/h (0.25
33、mrad/h) in air, when measured in accordance with A.1 and A.4. 4.4 Tritium leakage The tritium activity of the water shall not exceed 10 kBq (270 nCi), when measured in accordance with A.1 and A.5. 4.5 Water-soluble tritium content The manufacturer shall declare the total tritium content of each GTLS
34、. The amount of water-soluble tritium measured for each GTLS in A.6 shall not exceed 2 % of the total activity of that source. Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 09:58:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5499-2:1986 2 BSI 12-1998 4.6 Flammability When tested in accor
35、dance with appendix B, the external enclosure of the sign shall not exhibit any after-flame for a period in excess of 30 s after removal of the glow-wire. 5 Mounting The sign shall incorporate means for secure and rigid fixing of such a type that a special tool(s) and procedure is required for the r
36、emoval of the sign. The special tool(s) and procedure shall be declared by the manufacturer. 6 Identification and labelling 6.1 Manufacturers declaration The manufacturer shall provide written authenticated declarations of the following: a) that the energizing source is tritium gas; b) that no indiv
37、idual GTLS contains more than the amount of tritium specified in 3.1.3, at the date of supply; c) that the total activity of the tritium in the sign does not exceed the amount specified in 3.2.4 at the date of supply. 6.2 Marking Each sign shall be indelibly marked, so that the marking can be seen f
38、rom the front, with the basic radiation symbol given in BS 3510, and adjacent to this symbol in letters and figures not less than 3 mm high, the following: “Replace by: (month and year)” The marks shall be in such a position that no part of them is obscured. NOTEThe presence of the radiation symbol
39、does not imply that the sign constitutes a radiation hazard under normal conditions of use. Its purpose is to call attention to the fact that the sign contains radioactive material. 6.3 Labelling The back of each sign shall bear a label on which is given in permanent lettering the following. a) The
40、word “RADIOACTIVE”. b) The basic radiation symbol (see 6.2). c) The word “TRITIUM” and activity in gigabecquerels at date of supply. d) A serial number. e) The date of supply. f) The number and date of this British Standard, i.e. BS 5499-2:19862). g) The following wording: “Do not open. When this si
41、gn is to be discarded, it has to be despatched to or removed by a manufacturer of such signs, or a person who is authorized under Section 6(3) of the Radioactive Substances Act (1960) to dispose of such radioactive waste”. h) The manufacturers name and address. The difference between the dates refer
42、red to in 6.3 e) and 6.2 shall be 15 years. 2) Marking BS 5499-2:1986 on or in relation to a product is a claim by the manufacturer that the product has been manufactured to the requirements of the standard. The accuracy of such a claim is therefore solely the manufacturers responsibility. Enquiries
43、 as to the availability of third party certification should be addressed to the appropriate certification body. Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 09:58:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5499-2:1986 BSI 12-19983 Appendix A Methods of test for performance A.1 Genera
44、l The methods of test described in A.2 to A.5 shall be carried out in the order given and on the same sign. NOTEThe number of signs to be tested should be agreed between the parties concerned in testing. A.2 Physical characteristics test Carry out the procedures described in a) to e). After each tes
45、t, inspect the sign for visual structural failure affecting the mechanical strength or integrity of the sign and for visually apparent loss of light output. a) Ventilation holes. Insert a rod into the ventilation holes with a force of 10 N until an obstruction is met or to a maximum depth of 15 mm i
46、f no obstruction is evident. Repeat this procedure a total of 30 times at different angles in each vent hole. b) Impact test. Drop the sign on its face, then on its back and then on one side from a height of 1 m onto a smooth, hard, rigid surface. c) Temperature test. Heat the sign in air to a tempe
47、rature of + 80 C within 5 min. Keep the sign at this temperature, then cool to 20 C in less than 45 min. Keep the sign at this temperature for 1 h. d) Vibration test. Subject the sign to three complete cycles in the range 25 Hz to 500 Hz at 5gn. Conduct this test by sweeping through all the frequenc
48、ies in the range at a uniform rate from the minimum to the maximum frequency, and then return to the minimum frequency for 10 min or longer. Test each axis of the sign, and dwell for 30 min at each resonant frequency found. e) External pressure test. Expose the sign in air to pressures of 25 kPa abs
49、olute and 200 kPa absolute for four periods of 15 min each. Return the pressure to atmospheric between each period. A.3 Luminance test Take readings using a photometer in a darkened room and measure over a 9 mm diameter. Make the measurements with in a period of 1 month from the date of manufacture of the sign. A.4 Dose rate measurement Measure the radiation dose rate at the surface of the assembled sign using an appropriate method. NOTEAdvice on appropriate methods for the tests in A.4, A.5 and A.6 can be obtained from the National Radiological Protection Boa
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