1、CEN EN*269 94 W 3404589 008b787 801 BRITISH STANDARD Respiratory protective devices - Powered fresh air hose breathing apparatus incorporating a hood - Requirements , testing, marking The European Standard EN 269 : 1994 has the status of a British Standard UDC 614.894 73 620 1 BS EN 269 : 1995 CEN E
2、Nx269 94 = 3404589 O086788 748 = under the authority of the Standards Board and comes into effect on 15 January 1995 O BSI 1995 Amd. No. The following BSI references relate to the work on this standard: Committee reference PSM/14 Draft for comment 89/38484 DC ISBN O 680 22237 3 BS EN 269 : 1995 Date
3、 Bxt affected Cooperating organizations The European Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries: Austria BeMum Denmark Finland France Germany Greece Iceland Ireland Italy
4、Luxembourg Netherlands Norway Portugal Spain Sweden Switzerland United Kingdom Oesterreichisches Normungsinstitut Institut belge de normalisation Dansk Standard Suomen Standardisoimisliito, r. y. Association franaise de normalisation Deutsches Institut fr Normung e.V. Hellenic Organization for Stand
5、ardization Bchnological Institute of Iceland National Standards Authority of Ireland Ente Nazionale Italiano di Unificazione Inspection du Travail et des Mines Nederlands Normalisatie-instituut Norges Standardiseringsforbund Instituto Portugus da Qualidade Asociacin Espaola de Normalizacin y Certifi
6、cacin Standardiseringskommissionen i Sverige Association suisse de normalisation British Standards Institution CEN EN*Zh 94 3404589 0086789 684 BS EN 269 : 1996 Contents page Cooperating organizations inside front cover National foreword ii Foreword 2 Specification introduction 3 1 scope 3 2 Normati
7、ve references 3 3 Definitions and nomenclature 3 4 Description 3 5 Classification 3 6 Requirements 4 7 %sting 6 8 Marking 18 9 Instructions for use 18 ibles 1 Classification of apparatus 3 2 %sting schedule 7 Figures 1 2 3 4 5 6 7 8 9 10 Wooden blocks as used in practical performance tests Schematic
8、 diagram of flammability test apparatus Basket and hopper, rubber chippings Measurement of strength of couplings Collapse of air supply hose Arrangement of apparatus for assessment of resistance to kinking Arrangement to assess strength of body harness or belt and air supply hose Details of Sheffiel
9、d head and torso Arrangement of Sheffield head for measuring carbon dioxide content of inhalation air Scheme of test rig for carbon dioxide content of the inhalation air 8 9 10 11 13 13 14 15 16 17 National annexes NA (informative) Committees responsible NB (informative) Cross-references inside back
10、 cover Inside back cover i CEN ENaZb7 74 3404589 0086790 3Tb = BS EN 269 : 1995 National foreword This British Standard has been prepared under the direction of the Personal Safety Equipment Standards Policy Committee and is the English language version of EN 269: 1994 Respiratory protective devices
11、 - b) for not less than 4 h but not more than 16 h to a temperature of (- 30 f 3) OC. It shall then be allowed to return to ambient temperature. Page 7 EN 269 : 1994 7.3.2 Laboratory test Mer storage After undergoing the storage procedure in accordance with 7.3.1 the apparatus is tested using a brea
12、thing machine at a minute volume of 50 lmin (25 cycledmin, 2 lstroke) for at least 30 min. Check that the continuous flow valve operates correctly in the closed position. A check of the warning device shall be carried out. 7.3.3 Practical temperature tests at -6 OC 7.3.3.1 With cooled apparatus Prep
13、aration The hoods of two sets of apparatus are cleaned internally, according to the manufacturers instructions, and any excess liquid is removed thoroughly by shaking. The apparatus is then made ready for use. Each apparatus is pre-cooled for not less than 2 h but not more than 3 h to a temperature
14、of (- 6 f 3) OC. Procedure Two warmly clothed subjects don the apparatus in a cold chamber and perform work at an ambient temperature of (- 6 f 3) OC. The test is continuous, without removal of the apparatus, for 30 min. It-Lble 2. Testing schedule Test clause 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 7.10 7.
15、11 7.12 7.13 7.14 7.15 7.16 7.17 Title Visual inspection Resistance to temperature Inward leakage Flammability Practical performance test Strength of breathing hose connections Low air flow indicator device Resistance to collapse of air supply hose Resistance to kinking of air supply hose Strength o
16、f air supply hose, body harness and couplings Heat resistance of air supply hose Mechanical resistance of eyepiece or visor Breathing resistance Carbon dioxide content of inhalation air Noise level inside the hood LeaktiRhtness Temperature conditioning to 7.3.1 Yes Yes Yes No Yes Yes Yes Yes Yes Yes
17、 Yes Yes Yes Yes Yes Yes Requirement clause 6.1, 6.2, 6.7, 6.8, 6.9, 6.10, 6.12.4, 6.13, 6.14, 6.15 6.3 6.4, 6.16 6.5 6.6, 6.7, 6.9, 6.10, 6.13, 6.14, 6.15, 6.16.1, 6.16.2 6.7.3 6.14 6.12.1 6.12.2 6.12.3 6.12.5 6.16.1 6.16.4 6.17 6.18 6.19 Page 8 EN 269 : 1994 CEN ENa269 94 H 3404589 0086798 697 = T
18、he programme is divided into 5 min periods spent: a) walking slowly; b) crawling slowly; e) carrying wooden blocks or similar over a distance of 6 m and stacking them to a height of approximately 1 m in a pattern as shown in figure 1. The wooden block dimensions are approximately 160 mm x 160 mm to
19、give a mass of (7 f 1) kg. At the end of the test each apparatus is examined to check for malfunction due to low temperature. The air flow through the air supply hose shall be measured at the equipment connector prior to the test, after cooling and at the end of the test. 7.3.3.2 With apparatus at r
20、om temperature Preparation Two sets of apparatus are prepared ready for use and conditioned for not less than 2 h but not more than 3 h at (23 f 2) OC. Procedure Two warmly clothed subjects don the apparatus at room temperature (approximately 20 OC) and enter a cold chamber at (- 6 f 3) OC. A simila
21、r test programme to that described in 7.3.3.1 is carried out for 30 min. At the end of the 30 min period examine the apparatus for malfunction. 7.4 Inward leakage Inward leakage shall be measured using the procedures described in clause 5.4 of EN 136 : 1989 with the additional use of a supplementary
22、 fan as described in clause 6.1 of EN 146 : 1991. The experimental plan for the exercises shall be that given in clause 6.1.4 of EN 146 : 1991 and the expression of results as in clause 6.1.5 of EN 146 : 1991. 7.5 Flammability 7.5.1 Principle The hood or component mounted on a dummy head (hood), pas
23、sed through a flame and the effects of the flame on the device observed. 7.5.2 Apparatus 7.5.2.1 A dummy head mounted on a support which enables it to be rotated to describe a horizontal circle (see figure 2). A facility to enable attachment of any other parts of the device to the rotating support.
24、7.5.2.2 Gas supply rig consisting of a propane storage tank with flow control valve and pressure gauge, flashback arrester and a propane burner. The burner shall be adjustable in height. A TEKLU burner or that described in IS0 6941 : 1984/AMD 1 : 1992 has been found suitable1). 7.5.2.3 Themzocouple,
25、 1.5 mm diameter, mineral insulated. Figure 1. Wooden blocks as used in practical performance tests CEN ENx269 94 m 3404589 0086779 523 m 7.5.3 Procedure 7.5.3.1 Hood Fit the hood to the dummy head and ensure that a speed of rotation of (60 f 6) mm/s can be obtained. 7.5.3.2 Other components Fit the
26、 component to the support arm at such a radius that a speed of (60 f 6) mm/s can be obtained. 7.5.3.3 Rotate the head and hood or component so that it is over the burner. Adjust the position of the burner such that the distance between the top of the burner and the lowest part of the apparatus which
27、 is to pass through the flame is (20 f 2) mm. Rotate the head away from the burner. Ignite the gas at the burner. Ensure that the burner air vent is fully closed and adjust the flow control valve to give a flame height of (40 f 4) mm above the burner top. These settings shall give a flame temperatur
28、e of (800 f 50) OC at a point (20 f 2) mm above the burner top. Pass the hood or component once through the flame at the set speed of (60 f 6) mm/s. Repeat the test to enable an assessment to be made of all materials on the exterior of the apparatus. Any one component shall be passed through the fla
29、me once only. 7.5.4 Assessment and test report Examine the device after it has passed through the flame and report whether it continues to burn. Page 9 EN 269 : 1994 7.6 Practical performance test 7.6.1 General Apparatus which has satisfied the laboratory tests shall be used. Practical performance t
30、ests shall be carried out using two sets of apparatus and four different test subjects and a blower operator if necessary. The test plan shall be as shown below: test subjects 1 and 2 use apparatus 1; test subjects 3 and 4 use apparatus 2. 7.6.2 Test subjects Apparatus shall be tested by test subjec
31、ts who practice regularly with breathing apparatus and whose medical history is known to be satisfactory. The test subjects shall have been medically examined and certified fit to undertake the test procedures. The necessity of a medical examination immediately before the tests and medical supervisi
32、on during the tests shall be decided by the testing officer. 7.6.3 Preparation of apparatus to be tested Before each test the apparatus shall be checked for leaktightness. The length of the air supply hose shall be of the maximum specified. 7.6.4 Test conditions All tests shall be carried out at amb
33、ient temperature and the test temperature and humidity shall be recorded. Fia me Pressure gauge ur res ter f - Pressure reducer Valve / C Rotation motor Propane and cylinder - - Speed control Figure 2. Arrangement for testing flammability i) Information on a source of supply of a suitable burner may
34、 be obtained from the Secretariat of CEN/TC 79. CEN ENx269 94 M 3404589 0086800 075 M Page 10 EN 269 : 1994 Figure 3. Basket and hopper, rubber chippings 7.6.6 Work simulation test for class 1 equipment Class 1 equipment shall be assessed using a simulation of the practical use of the apparatus. The
35、 test shall be completed within a working time of 20 min. The sequence of activities is at the discretion of the testing officer. The following activities shall be carried out: a) walking on the level with headroom of (1,3 f 0,2) m for 5 min; b) crawling on the level with headroom of (0,70 f 0,05) m
36、 for 5 min; c) filling a small basket (see figure 3), approximate volume 8 1 with rubber chippings from a hopper which stands 1,5 m high and has an opening at the bottom to allow the contents to be shovelled out and a further opening at the top where the rubber chippings may be returned. The subject
37、 stoops or kneels as he wishes and fills the basket with rubber chippings. He then lifts the basket and empties the contents back into the hopper. This is repeated 20 times in 10 min. 7.6.6 Work simulation test for class 2 equipment Class 2 equipment shall be assessed using a simulation of the pract
38、ical use of the apparatus. The test shall be completed within a total working time of 30 min. The sequence of activities is at the discretion of the testing officer. The following activities shall be carried out: a) 30 pub on a work machine, each pull being vertical from 1,s m towards the ground on
39、a mass of 25 kg; b) walking on the level with full headroom (total distance 125 m)*; c) walking on the level with headroom of (1,3 f 0,2) m (total distance 200 m)*; d) crawling on the level with headroom of (0,70 f 0,05) m (total distance 100 m)*; e) climbing up and down a ladder passing once, in bo
40、th directions, through a 460 mm square opening (total vertical distance 20 m); f) carrying 20 sandbags (12 kg) individually over a distance of 10 m and placing them at arms length on a 1,5 m high wall. This test shall be continuous, without removal of the apparatus. 7.6.7 Ir b) security of fastening
41、s and couplings; c) accessibility of controls and pressure gauge (if fitted); d) clarity of vision from the facepiece; e) accessibility and ease of operation of the supplementary supply (if fitted); f) ease of speech transmission; g) effectiveness of audible warning device (if fitted); h) manoeuvrab
42、ility of the air supply hose; i) comfort of facepiece; j) comments by the wearer on the ease of obtaining ambient air or the use of any emergency system provided; k) any other comments volunteered by the wearer. * These operations may be split for the convenience of the testing officer. CEN EN*Zb 94
43、 3404589 008b80L TOL 7.7 Strength of breathing hose connections Apply the appropriate forces for class 1 and class 2 apparatus for (10 f 1) s to the breathing hose as shown in figures 4a) and 4b). Examine the apparatus for signs of failure. 7.8 Low air flow indicator device 7.8.1 Apparatus 7.8.1.1 S
44、heffield dummy headtorso connected to a variable suction device and flowmeter. 7.8.1.2 Lightweight plastics bag to seal around hood and breathing hose. 7.8.2 Procedure Mount the hood on the dummy head/torso which is connected to the suction device and flowmeter. Seal a lightweight plastics bag aroun
45、d hood and breathing hose. Page 11 EN 269 : 1994 Connect up the air supply system and low air flow indicator device in accordance with the instructions for use. Fuiiy close the supply valve (if fitted) and adjust the supply pressure to the input of the compressed air supply tube until the low flow w
46、arning functions. Adjust the variable suction device connected to the flowmeter until zero pressure is measured in the plastics bag. At this point the flow being measured on the flowmeter is equal to the flow being delivered to the flowmeter. if an audible warning device is incorporated on the equip
47、ment being worn, measure the sound pressure level at a position equivalent to that of the ears of the wearer. Figure 4. Arrangement a) 50 N for class1 250 N for class 2 A W for testing strength of couplings CEN ENx269 94 W 340Li589 0086802 948 W Page 12 EN 269 : 1994 250 N for class1 1000 N for clas
48、s 2 Dimensions in mm Figure 6. Arrangement of testing coliapse of air supply hose 7.8.3 Report 7.8.3.1 Whether or not the flow measured in 7.8.2 is greater or equal to the manufacturers minimum design flow rate. 7.8.3.2 The average sound pressure level measured in 7.8.2. 7.9 Resistance to coiiapse o
49、f air supply hose 7.9.1 Apparatus 7.9.1.1 Two metal plates 100 mm square, or circular 100 mm in diameter, one of which is fixed and the other capable of moving at right angles to the plane of the plates and of being loaded to produce a range of pressures between the plates (see figure 5). 7.9.1.2 F.!Quw 8.3.2 year of manufacture; 8.3.3 class; 8.3.4 if appropriate heat resistant; 8.3.5 if appropriate antistatic. 8.4 The apparatus shall be marked with: 8.4.1 manufacturers name, trade mark or other means of identification; 8.4.2 year of manufacture; 8.4.3 t
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