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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 12021:1999 Incorpor
2、ating Corrigendum No. 1 The European Standard EN 12021:1998 has the status of a British Standard ICS 13.340.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Respiratory protective devices Compressed air for breathing apparatus This British Standard, having been prepared unde
3、r the direction of the Health and Environment Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 April 1999 BSI 04-1999 ISBN 0 580 32082 0 BS EN 12021:1999Issue 2, April 1999 Amendments issued since publication Amd. No.DateText affected 10517 C
4、orrigendum April 1999Indicated by a sideline National foreword This British Standard is the English language version of EN 12021:1998. Clause 6.2.1 of this European Standard requires that, in any event all contaminants shall be kept to as low a level as possible and shall be below the national expos
5、ure limit. National Occupational Exposure Limits (OEL) for substances hazardous to health are published yearly by the Health and Safety Executive and can be found in Guidance Note, Occupational exposure limits (EH40). In the context of this European Standard below the national limit will mean that t
6、he concentration level should not be greater than 10 % of the relevant time (8 h) weighted average OEL. The UK participation in its preparation was entrusted by Technical Committee PH/4, Respiratory protection, to Subcommittee PH/4/1, Selection and terminology, which has the responsibility to: aid e
7、nquirers to understand 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 list of organizations represented
8、on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled International Standards Correspondence I
9、ndex, or by using the Find facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself co
10、nfer immunity from legal obligations. Issue 1, April 1999BS EN 12021:1999 BSI 04-1999a Summary of pages The following table identifies the current issue of each page. Issue 1 indicates that a page has been introduced for the first time by amendment. Subsequent issue numbers indicate an updated page.
11、 Vertical sidelining on replacement pages indicates the most recent changes (amendment, addition, deletion). PageIssuePageIssue Front cover Inside front cover a b EN title page 2 2 1 blank original EN foreword 3 4 Inside back cover Back cover original 2 original original original bblank CEN European
12、 Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12021:1998 E EUROPEAN
13、 STANDARDEN 12021 NORME EUROPE ENNE EUROPA ISCHE NORM December 1998 ICS 13.340.30 Descriptors: personal protective equipment, respiratory protective equipment, compressed air, designation, specifications, quality, composition, determination of content, water English version Respiratory protective de
14、vices Compressed air for breathing apparatus Appareils de protection respiratoire Air comprime pour appareil de protection respiratoire isolant Atemschutzgera te Druckluft fu r Atemschutzgera te This European Standard was approved by CEN on 4 December 1998. CEN members are bound to comply with the C
15、EN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or t
16、o any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official version
17、s. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Page 2 EN 12021:1998 BSI 04-1999 Foreword This European
18、Standard has been prepared by Technical Committee CEN/TC 79, Respiratory protective devices, 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 June 1999, and
19、 conflicting national standards shall be withdrawn at the latest by June 1999. This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). For relationship with EU Di
20、rective(s), see informative Annex ZA, which is an integral 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, Finland, Fran
21、ce, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword2 1Scope3 2Normative references3 3Definitions3 4Designation3 5General3 6Requirements3 6.1Oxygen3 6.2Contaminants3 6.3Water content3 7Sampl
22、ing and testing3 Annex A (informative) Typical composition of natural air (ISO 2533)4 Annex ZA (informative) Clauses of this European Standard addressing essential requirements or other provisions of EU Directives4 Issue 2, April 1999Page 3 EN 12021:1998 BSI 04-1999 1 Scope This European Standard sp
23、ecifies requirements for the quality of compressed air supplied for use with the following types of equipment. a) Respiratory protective devices self-contained open-circuit compressed air breathing apparatus and open-circuit compressed air underwater breathing apparatus (SCUBA). b) Respiratory prote
24、ctive devices compressed air line breathing apparatus and compressed airline breathing apparatus for use under water. c) Respiratory protective devices for escape self-contained open-circuit compressed air breathing apparatus including full face mask or mouthpiece assembly or hoods. The standard als
25、o applies to synthetic air. Account is taken of the use of air at normal ambient pressures and increased pressures. Maximum allowable concentrations of impurity for compressed air are quoted as values calculated at normal atmospheric pressure. This European Standard does not apply to compressed air
26、used for medical purposes, for underwater breathing apparatus specially designed to be used for diving in water and other fluids when the hydrostatic pressure exceeds 6 bar absolute or for breathing apparatus designed for use at high altitudes. 2 Normative references This European standard incorpora
27、tes, by dated or undated reference, provisions from 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 revisions of any of these publications apply to this Europea
28、n Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 132, Respiratory protective devices Definitions of terms and pictograms. ISO 2533, Standard atmosphere. 3 Definitions For the purposes of this standa
29、rd the definitions given in EN 132 apply. 4 Designation Designation of compressed air meeting the requirements of this standard: compressed air for breathing apparatus, EN 12021. 5 General All data given or required in this European Standard are valid for normal atmospheric pressure (1 bar absolute,
30、 20 8C). All percentage requirements are given in % by volume (dry air). Typical composition of natural air is given in annex A. | 6 Requirements 6.1 Oxygen The oxygen content shall be in the range of (211) % by volume (dry air). 6.2 Contaminants 6.2.1 General Compressed air for breathing apparatus
31、shall not contain any contaminants at a concentration which can cause toxic or harmful effects. In any event all contaminants shall be kept to as low a level as possible and shall be far below the national exposure limit. Combination effects of more than one contaminant shall be taken into account.
32、In the absence of more stringent national requirements the values in 6.2.2 to 6.2.5 shall be applied. NOTEThe limit of concentration for any contaminant should be derived from national exposure levels taking into account as far as is reasonably practical the effects of pressure and exposure time. 6.
33、2.2 Lubricants Lubricant content (droplets or mist) shall not exceed 0,5 mg/m3. Where synthetic lubricants are present, 6.2.1 applies. 6.2.3 Odour and taste The air shall be without significant odour or taste. 6.2.4 Carbon dioxide content The carbon dioxide content shall not exceed 500 ml/m3 (500 pp
34、m). 6.2.5 Carbon monoxide content The carbon monoxide content shall be as low as possible but not exceed 15 ml/m3(15 ppm). 6.3 Water content 6.3.1 There shall be no free liquid water. 6.3.2 Air for compressed air line breathing apparatus shall have a dewpoint sufficiently low to prevent condensation
35、 and freezing. Where the apparatus is used and stored at a known temperature the pressure dewpoint shall be at least 5 8C below the likely lowest temperature. Where the conditions of usage and storage of the compressed air supply is not known the pressure dewpoint shall not exceed 211 8C. 6.3.3 The
36、maximum water content of air at atmospheric pressure given in Table 1 shall be used. Table 1 Nominal pressureMaximum water content of air at atmospheric pressure barmg/m3 40 to 20050 20035 NOTEThe water content of the air supplied by the compressor for filling 200 bar or 300 bar cylinders should not
37、 exceed 25 mg/m3. 7 Sampling and testing Any appropriate method may be employed, provided it conforms with the following general requirements: for measuring and assessing results the accuracy of the method shall be taken into consideration, and the detection limit of the method employed shall be bel
38、ow the required limit value. Page 4 EN 12021:1998 BSI 04-1999 Annex A (informative) Typical composition of natural air (ISO 2533) Table A.1 ComponentsMass in % (dry air) Volume in % (dry air) Oxygen (02)23,1420,947 6 Nitrogen (N2)75,5278,084 Argon (Ar)1,2880,934 Carbon dioxide (CO2)0,0480,031 4 Hydr
39、ogen (H2)0,000 0030,000 05 Neon (Ne)0,001 270,001 818 Helium (He)0,000 0730,000 524 Krypton (Kr)0,000 3300,000 114 Xenon (Xe)0,000 0390,000 008 7 Annex ZA (informative) Clauses of this European Standard addressing essential requirements or other provisions of EU Directives. This European Standard ha
40、s been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association and supports essential requirements of EU Directive 89/686/EEC. WARNING: Other requirements and other EU Directives may be applicable to the product(s) falling within the scope of this sta
41、ndard. The clauses of this standard are likely to support requirements of Directive 89/686/EEC, Annex II: EU Directive 89/686/EEC, Annex IIClauses of this standard 1.2.1.16 2.86 3.10.16 3.116 Compliance with this standard provides one means of conforming with the specific essential requirements of t
42、he Directive concerned and associated EFTA regulations. blank BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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