1、STDvBSI BS EN LqS-ENGL L97B I1624669 0707124 938 m BRITISH STANDARD Respiratory protective devices - Self-contained closed-circuit breathing apparatus compressed oxygen or compressed oxygen-nitrogen type - Requirements, testing, marking The European Standard EN 145 : 1997, with the incorporation of
2、amendment A1:2000, has the status of a British standard ICs 13.340.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMlTED BY COPYRIGHT LAW BS EN 145; : 1998 Ivting AmendmentNo. 1 National foreword Amd. No. Date 13132 May 2001 This British Standard is the English language veision of EN 145 : 1997, i
3、ncluding amendment A1:2000. It supersedes BS 7170 : 1990 and BS EN 1452 : 1993, which are withdrawn. The UK participation in its preparation was entrusted to Technical Committee PW4, Respiratory protection, which has the responsibility to: Text affected Indicated by a sideline - aid enquirers to und
4、erstand the text; - present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; - monitor related international and European developments and promulgate them in the UK. A iist of organizations represented on this com
5、mittee can be obtained on request to ils secrem. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Siandards Catalogue under the section entitied Intemationai Standards Correspondence Index?, or by using
6、 the ?Find? facility of the BSI Standards Electronic Catalogue. 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, the EN title page, pages 2 to 26, an inside back cover and a ba
7、ck cover. The BSI copyright notice dispiayed in this document indicates when the document was last issued. Sidelining in this document indicates the most recent changes by amendment This British Standard, having been prepared under the direction of the Health and Environment Sector Board, was publis
8、hed under the authority of the Standards Board and comes into effect on 15 January 1998 Q BSI 06-2-2001 ISBN O 580 28694 O STD.BS1 BS EN Li15-ENGL L778 Lb24bb9 0907LZb 700 EUROPEAN mm EN 145 EXJROP- NORM +Al NORME EUROPENNI3 August 1997 March ZOO0 ICs Supersedes EN 145 : 1988 and EN 1462 : 1992 Desc
9、riptors: Personal pmkctive equipment, accident prevention, respiratory protective equipment, compressed gas, oxygen, nitmgen, designation, specifications, safety, tests, marking English version Respiratory protective devices - Sekontained cl - specifications for oxygen - nitrogen devices. For relati
10、onship with EU Directive, see informative annex which is an integrai part of this standard. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard Austria, Belgium, Czech Republic, Denmark, Finl
11、and, Fiance, Gem Greece, Iceland, Jrehd, Italy, Luxembourg, Netherlands, Norway, Po-, Spain, Sweden, Switzerland and the United Kingdom. Foreword to amendment Al This European Standard has been prepared by Technical Committee CENAC 79, Respiratory protective devices, the Secretariat of which is held
12、 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 September 2000, and conflicting national standards shall be withdrawn at the latest by September 2000. This European Standard has been prep
13、ared under a mandate given to CEN by the European Commission and the European Free We Association, and supports essential requirements of EU Directive(s). According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this Eu
14、ropean Standard Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Q BSI 052001 Page 3 EN 146 : 1997 STDmBSI BS EN LYS-ENGL 1998 Lb24bb9 0903328 583 9 Intr
15、oduction A given respiratory protective device can oniy be approved when the individual components satisfy the requirements of the test specification whch may be a complete standard or Part of a standard and praccal performance tests have been canied out on complete apparatus where specined in the a
16、ppropriate standard If for any reason a complete apparatus is not tested then simulation of the apparatus is permitted provided the respiratory characteristics and mass distribution are similar to those of the complete apparatus. 1 scope This European Standard specifies minimum requirements for self
17、-contained closed-circuit breathing apparatus, compressed oxygen (w and compressed oxygen-nitrogen (02 - NZ) types, used as respiratory protective devices, except escape apparatus and diving WPW. Laboratory and practical performance tests are included for the assessment of compliance with the requir
18、ements. 2 Normative references This European Standard incorporates by dated or undated reference, provisions hm other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or
19、revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 132 : 1990 EN 134 : 1990 EN 136 : 1997 EN 142 : 1989 EN 1441 : 1991 EN 1481 : 1987 EN 148
20、2 : 1987 EN 1483: 1992 Respiratory protective deuic b) at 30 Vmin continuous flow for sets with a continuous gas flow rate of less than 2 Vmin. Testing shall be done in accordance with 7.12. 6.8.4 Leaktightness of relit$ valve The reiief vaive shal withstand an outside presure of 10 mbar operating a
21、gainst the opening direction of the vaive without exceeding a maximum pressure drop of lmbarinlmin Testing shall be done in accordance with 7.17. - STDOBSI BS EN 345-ENGL 3998 = 1624667 0307333 074 II Page 6 EN 146 : 1997 6.9 Breathing bag 6.9.1 General The breathing bag shail be made of strong flex
22、ible material and shall be protected agauist compression by external forces. The breathuig bag shall be reliably and tightly joined to the connection. The connector at the inhalation side shall be shaped in such a way that its opening mot be closed by the bag itself. 6.9.2 Volume The effective volum
23、e of the breathing bag shall be at least 5 1. It shail be measured between 7,5 mbar and -5 mbar relative to atmospheric pressure. Nm. For apparatus using a constant flow supply it may be necessary to increase the volume of the breathing bag. Testing shail be done in accordance with 7.2 and 7.13. 6.1
24、0 Practical performance In addition to the machine tests described, the apparatus shall also undergo practical performance tests under realistic conditions. These practical performance tests serve the purpose to check the apparatus for imperfections that cannot be determined by the tests described e
25、lsewhere in this European Standard At the time when the apparatus is rejected by the wearer or when the inhalation breathing resistance reaches 35 mbar, the level of oxygen in the inhalation air shall be at least 21 % (by volume) and the level of CO2 shall not exceed 3 % (by volume). Where, in the o
26、pinion of the testing authority, approval is not granted because practical performance tests show the apparatus has imperfections related to the wearers acceptance, the testing authority shall describe the tests which revealed these imperfections. This wili enable other test houses to duplicate the
27、tests and assess the resuits thereof. Testing shall be done in accordance with 7.3. 6.11 Resistance to temperature, flammability and resistance to radiant heat 6.11.1 Resistance to temperature “kouble free operation shall be ensured after storage at temperatures mnging from -30 C to 60 “C. Testing s
28、hall be done in accordance with 7.4.1.1,7.4.1.2,7.4.2.1 and 7.4.2.2. 6.1 1.2 Peflornaance 6.11.2.1 Pmnce at -6 C to 30 C The apparatus shall operate trouble free over the temperature range -6 “C to 30 C. Testing shall be done in accordance with 7.4.1.2 and 7.4.2.2. 6.11.2.2 Low tmperature lxytimnce
29、(0ptma.l) Where the apparatus is designed for low temperatures below -6 “C it shall operate trouble free. Testing shall be done in accordance with 7.4.1.3 and 7.4.2.3. 6.11.3 Conditioning ofthe apparatus 6.11.3.1 Fee connector Subsequent to conditioning in accordance with 7.14 and returning to tempe
30、rature of (20 f 3) “C all connections between apparatus and facepiece shall be checked Where the centre thread is used it shall be checked with thread pitch gauges. After testing, the facepiece connector shail remain dimensionally accurate to gauge. For all facepiece connectors a pull test in accord
31、ance with 7.12.4 of EN 136 : 1997 shall be appiied No separation shail occur. Testing shall be done in accordance with 7.2. 6.11.3.2 firnth of the appamtus Subsequent to conditioning in accordance with 7.14 and returning to ambient temperature the apparatus shal meet the requirements of 6.28 at a mi
32、nute volume of 50 Vmin The materials used shall not show any deterioration, e.g. deformations, craks or corrosion. Testing shail be done in accordance with 7.2 and 7.8. 6.11.4 Flammability The breathing hoses leading to the facepiece, the facepiece connector and the lung governed demand valve (if co
33、nnected to the facepiece) shall be seif+xtinguishing, i.e. the material shall not be of a highly flammable nature and the parts shall not ignite or continue to burn for more than 5 s after removal from the test flame. Testing shall be done in accordance with 7.16. 6.11.6 Resistance to radiant heat T
34、he breathing hoses, the facepiece connector and the lung governed demand valve (if connected to the facepiece) shai be tested for resistance to radiant heat using the test methods described in 8.6 of EN 136 : 1997. The apparatus is considered to be resisant to radiant heat in accordance with this Eu
35、ropean Standard if it continues to function correctly and the components remain leaktight after a test period of 20 min, altho the components may be deformed 6.12 Strength of high and medium pressure P- Metallic high pressure tubes, vaives and connections shall be capable of withstanding a test pres
36、sure of 50 % above the maximum filling pressure of the cylinder(s). Non-metallic high pressure parts shall be capable of withskinding a test pressure of twice the maximum fillingpressure. Ail medium pressure tubes downstream of the pressure reducer shaii be capable of withstanding twice their maximu
37、m attainable working pressure for at least 15 min. Testing shail be done in accordance with 7.2. 6.13 Interchangeability of high, medium and low pressure connections High, medium and low pressure connedons shall not be interchangeable. Testing shall be done in accordance with 7.2, 6.14 Cylinders onl
38、y cylinders of equai maximum filling pressure shall be connected to an apparatus with more than one cylinder. Compressed gas cylinders shall comply with national requiremens. The cylinder shall be approved with respect to the appropriate liing premm. Testing shali be done in accordance with 7.2. 6.1
39、6 Cylinder valve There shaii be oniy one vaive to control the totai gas *red. The vaive shall be so designed that the vaive spindle cannot be completely unscrewed from the assembly during normal operation of the vaive. The de shaii be designed so that it cannot be closed inadvertently by contact wit
40、h a surface by one of the following methods a) the valve shall be designed so that aminimum of two turns of the handwheel are required to fully open the Valve; or b) the valve shaU be lockable in the open position The connection between the cylinder and the cylinder valve shall be achieved by a conn
41、ection defined in EN 144-1 : 1991. Testing shall be done in accordance with 7.2. 6.16 Cylinder valve outlet It shall not be possible to connect cylinders with a higher maximum filling pressure (e.g. 300 bar) to an apparatus which is designed only for a lower maximum filling pressure (e.g. 200 bar).
42、Testing shaii be done in accordance with 7.2. 6.17 Pressure reducer Any adjustable medium pressure stage shall be reiiably secured against accidental alteration and adequately sealed, so that any unauthorized adjustment can be detected The pressure reducer shall maintain a medium pressure of 210% of
43、 the manufacturers design pressure at ali cylinder pressures above 20 bar. Where component parts of the apparatus downstream of the pressure reducer are not capable of withstandmg the full cylinder pressure, a pressure reducer safety valve shall be provided The pressure reducer safety Valve shail be
44、 designed to pass an air flow of at least 100l/min at a medium pressure not exceeding 30 bar. With the pressure reducer safety valve activated, the inhalaton and exhalation breathing resistance shaii not exceed 25 mbar. Testing sha be done in accordance with 7.16. Where a pressure reducer safety Val
45、ve is not provided, the breathing resistance requirements given above shaii be met at a simulated air flow of 100Vmin. Testing shall be done in accordance with 7.16. 6.18 Pressure indicator The apparatus shaii be equipped with a reliable pressure indicator, which will indicate the pressure in the cy
46、linder($) on opening the or 2) the inhalation resistance has reached 35 mbaq the carbon dioxide content of the inhaled gas shall not exceed 3 % (by volume) when tested in accordance with 7.8.2 and table 6. Testing shall be done in accordance with 7.3,7.4 and 7.8.2. 6.28.6.3 Carbon dimie content in f
47、unctioning appamtus The carbon dioxide content of the inhaled gas of the apparatus ready for use shall not exceed 2 % (by volume) during nominal working duration when tested in accordance with 7.8.2 and table 6. Testing shali be done in accordance with 7.3,7.4 andi 7.8.2. Positive pressure apparatus
48、 Oto7 o to 10 I Ible 3. Breathing resistance 50 (25 cycldmjn, 2,O Ystroke) 75 (30 cycles/min, 2,5 Vstroke) Minute volume Ymin 60 5 Test time min 0 MI 052001 STD-BSI BS EN 14s-ENGL 1998 E 162Ybb9 0907335 713 W Negative pressure apparatus Page 10 EN 146 : 1997 Positive pressure apparatus 7Testing 7.1
49、General If no speciai measuring devices or measuring methods are specified, commonly used methods and devices shaU be applied 7.2 Visual inspection visual inspecton shall be carried out where appropriate by the test house prior to laboratory or practical performance tests. The visual inspection shall include marking and the information supplied by the manufacturer. 7.3 Practical performance Practical performance tests shall be performed with at least 2 apparatus and 4 test subjects. 7.3.1 Test subjects The closedcircuit breathing apparatus shail b
