1、July 2014Translation by DIN-Sprachendienst.English price group 11No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 13
2、.340.30!%7“2206156www.din.deDDIN EN 12021Respiratory equipment Compressed gases for breathing apparatus;English version EN 12021:2014,English translation of DIN EN 12021:2014-07Atemgerte Druckgase fr Atemschutzgerte;Englische Fassung EN 12021:2014,Englische bersetzung von DIN EN 12021:2014-07Apparei
3、ls de protection respiratoire Gaz comprims pour appareil de protection respiratoire;Version anglaise EN 12021:2014,Traduction anglaise de DIN EN 12021:2014-07SupersedesDIN EN 12021:1999-01www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises
4、18 pages06.14 DIN EN 12021:2014-072 A comma is used as the decimal marker. National forewordThis document (EN 12021:2014) has been prepared by Technical Committee CEN/TC 79 “Respiratory protective devices”, Subcommittee SC 7 “Diving apparatus” (Secretariat: DIN, Germany). The responsible German body
5、 involved in its preparation was the Normenausschuss Feinmechanik und Optik (Optics and Precision Mechanics Standards Committee), Working Committee NA 027-02-08 AA Tauchgerte. Amendments This standard differs from DIN EN 12021:1999-01 as follows: a) the title has been changed to include compressed g
6、ases for breathing apparatus; b) relevant definitions have been included; c) tables for breathing gases other than air have been included; d) additional designations have been included. Previous editions DIN 3175: 1987-12 DIN 3188: 1974-01, 1981-09, 1984-09 DIN EN 132: 1991-05 DIN EN 12021: 1999-01
7、EN 12021April 2014 ICS 13.340.30 Supersedes EN 12021:1998English Version Respiratory equipment - Compressed gases for breathing apparatus Appareils de protection respiratoire - Gaz comprims pour appareil de protection respiratoire Atemgerte - Druckgase fr Atemschutzgerte This European Standard was a
8、pproved by CEN on 6 February 2014. CEN members are bound to comply with the CEN/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 nati
9、onal standards may be obtained on application to the CEN-CENELEC Management Centre or to 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 langu
10、age and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,
11、 Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in a
12、ny form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12021:2014 EEUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 12021:2014 (E) 2 Contents PageForeword 3 1 Scope 4 2 Norma
13、tive references 4 3 Terms and definitions .4 4 Units 5 5 Reference conditions 5 6 Requirements .6 6.1 General 6 6.2 Breathing air .6 6.3 Mixing of gases 7 6.3.1 General 7 6.3.2 Oxygen compatible air 7 6.3.3 Nitrogen depleted air and oxygen enriched air 8 6.3.4 Breathing oxygen.8 6.3.5 Oxygen and nit
14、rogen gas mixtures 9 6.3.6 Oxygen and helium gas mixtures 9 6.3.7 Oxygen, helium and nitrogen gas mixtures . 10 6.3.8 Helium 11 6.4 Odour . 11 7 Sampling and testing . 11 8 Designation . 12 Annex A (informative) Natural air 13 Annex B (informative) Details of significant technical changes between th
15、is European Standard and the previous edition 14 Annex ZA (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 89/686/EEC . 15 Bibliography . 16 DIN EN 12021:2014-07EN 12021:2014 (E) 3 Foreword This document (EN 12021:2014) has been prepared by Tec
16、hnical 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 October 2014, and conflicting national standar
17、ds shall be withdrawn at the latest by October 2014. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 12021
18、:1998. Annex B provides details of significant technical changes between this European Standard and the previous edition. This document 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 Directi
19、ve(s). For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulg
20、aria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Tu
21、rkey and the United Kingdom. DIN EN 12021:2014-07EN 12021:2014 (E) 4 1 Scope This European Standard specifies requirements for the quality of compressed gas supplied for mixing or use in respiratory protective devices and hyper- and hypobaric operations. Account is taken of the use of compressed gas
22、es for normal atmospheric pressure as well as for hyper- and hypobaric pressures. This European Standard does not apply to compressed gases used for medical purposes or for aerospace applications. 2 Normative references The following documents, in whole or in part, are normatively referenced in this
23、 document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 132:1998, Respiratory protective devices - Definitions of terms and pictograms 3 Ter
24、ms and definitions For the purposes of this document, the terms and definitions given in EN 132:1998 and the following apply. 3.1 hydrocarbon organic compound consisting of hydrogen and carbon 3.2 oil mixture of hydrocarbons and other organic compounds composed of six or more carbon atoms (C6+) 3.3
25、trimix gas comprising a specified mixture of oxygen, helium and nitrogen, capable of supporting human life under appropriate diving or hyperbaric conditions Note 1 to entry: This includes manufactured gas mixtures made up from combinations of pure oxygen, pure helium and pure nitrogen, with or witho
26、ut compressed air. 3.4 heliox gas comprising a specified mixture of oxygen and helium, capable of supporting human life under appropriate diving or hyperbaric conditions 3.5 oxygen and nitrogen gas mixture gas comprising a specified mixture of oxygen and nitrogen, capable of supporting human life un
27、der appropriate diving or hyperbaric conditions Note 1 to entry: Oxygen and nitrogen gas mixtures are also known as “nitrox”. Note 2 to entry: This definition does not cover gas mixtures produced using oxygen compatible air or nitrogen depleted air. DIN EN 12021:2014-07EN 12021:2014 (E) 5 3.6 oxygen
28、 compatible air compressed natural breathing air where the level of impurities has been reduced to make it suitable for use in gas mixtures including those containing oxygen concentrations greater than 22 % Note 1 to entry: Oxygen compatible air is also known in the diving industry as “oil free air”
29、, “clean air” or “double filtered air”. 3.7 nitrogen depleted air oxygen compatible air from which some nitrogen has been removed to make it suitable for use in, or as, a gas mixture containing oxygen concentrations greater than 22 % Note 1 to entry: Nitrogen depleted air is also known as “nitrox”.
30、3.8 oxygen enriched air compressed natural breathing air to which some oxygen has been added prior to compression and the level of some impurities reduced to make it suitable for use in or as a gas mixture containing oxygen concentrations greater than 22 % Note 1 to entry: Oxygen enriched air is als
31、o known as “nitrox”. 3.9 dewpoint at a specified pressure, the temperature at, or below which, condensation from the gas phase will occur Note 1 to entry: This also includes frost point. 3.10 synthetic air mixture of oxygen and nitrogen that has an oxygen content of (21 1) % Note 1 to entry: Synthet
32、ic air is also known as “nitrox”. 4 Units General use of SI units (see ISO 80000) as given throughout this International Standard is recommended. However, in agreement with accepted practice, some non-preferred SI units accepted by ISO are also used. EXAMPLE 100 kPa = 1,00 bar. IMPORTANT The acronym
33、 ppm (parts per million) is used throughout the world to indicate the absolute content of a substance within a mixture. So in this case the ml m3equivalent notation “ppm” has been used in brackets in the tables. In this European Standard ppm is understood as concentration of a gas in parts per milli
34、on per volume. 5 Reference conditions All data given in the tables or required in this European Standard are valid for normal atmospheric pressure (1 013 mbar absolute, 20 C). All percentage requirements are given in % by volume (dry gas). All pressures in this European Standard are in bar absolute.
35、 Typical composition of natural air is given in Annex A. DIN EN 12021:2014-07EN 12021:2014 (E) 6 Maximum allowable concentrations of impurities for compressed gases are quoted as values calculated at normal atmospheric pressure. 6 Requirements 6.1 General Compressed gas for breathing shall not conta
36、in 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 less than one tenth of a national 8 h exposure limit. For breathing air only the limit shall be less than one sixth of a national 8 h e
37、xposure limit. For breathing at hyperbaric pressures greater than 10 bar or exposure times greater than 8 h the levels shall be revised to take into account the effects of pressure and exposure times. In the absence of more stringent national regulations, the values in Table 1 to Table 10 shall be a
38、pplied. 6.2 Breathing air Typical composition of natural air is given in Annex A. Table 1 Composition of breathing air Component Concentration at 1 013 mbar and 20 C Oxygen (21 1) % Carbon dioxide 500 ml m3(ppm) Carbon monoxide 5 ml m3(ppm) Oil 0,5 mg m3Compressed breathing air shall have a dew poin
39、t sufficiently low to prevent condensation and freezing. Where the apparatus is used and stored at a known temperature the pressure dew point shall be at least 5 C below the likely lowest temperature. Where the conditions of usage and storage of any compressed air supply is not known the pressure de
40、w point shall not exceed 11 C. Table 2 Water content of high pressure breathing air Nominal maximum supply pressure bar Maximum water content of air at atmospheric pressure and 20 C mg m340 to 200 50 200 35 The water content of the air supplied by the compressor for filling 200 bar or 300 bar cylind
41、ers should not exceed 25 mg m3. DIN EN 12021:2014-07EN 12021:2014 (E) 7 Table 3 Water content for supplied breathing air up to 40 bar Nominal maximum supply pressure (bar) Maximum water content of air at atmospheric pressure and 20 C mg m35 290 10 160 15 110 20 80 25 65 30 55 40 50 6.3 Mixing of gas
42、es 6.3.1 General Where any of the gases specified in Table 4 to Table 10 are mixed to produce a breathing gas, the resultant gas mixture shall be tested for oxygen content. The oxygen content shall conform to the relevant value as given for the particular gas mixture, as applicable. Where any of the
43、 gases specified in Table 8 to Table 9 are mixed to create a diving breathing gas, the resultant gas mixture shall also be tested for helium content. The helium content shall conform to the relevant value as given for the particular gas mixture in Table 8 to Table 9, as applicable. As the purity and
44、 contaminant levels of the gases used for mixing are specified in Table 4 to Table 9 it is only the ratio of the mixing that needs to be confirmed. Therefore, post mixing, only the oxygen and, where applicable, the helium content need to be tested to confirm that the correct mixture has been achieve
45、d. 6.3.2 Oxygen compatible air Table 4 Composition of oxygen compatible air Component Concentration at 1 013 mbar and 20 C Oxygen (21 1) % Water 25 mg m3Carbon dioxide 500 ml m3(ppm) Carbon monoxide 5 ml m3(ppm) Oil 0,1 mg m3DIN EN 12021:2014-07EN 12021:2014 (E) 8 6.3.3 Nitrogen depleted air and oxy
46、gen enriched air Table 5 Composition of nitrogen depleted air and oxygen enriched air Component Concentration at 1 013 mbar and 20 C Oxygen (Stated a 1,0) % Water 25 mg m3Carbon dioxide 500 ml m3(ppm) Carbon monoxide 5 ml m3(ppm) Oil 0,1 mg m3aPercentage as stated by the supplier. 6.3.4 Breathing ox
47、ygen Table 6 Composition of breathing oxygen Component Concentration at 1 013 mbar and 20 C Oxygen 99,5 % Water 15 mg m3Carbon dioxide 5 ml m3(ppm) Carbon monoxide 1 ml m3(ppm) Oil 0,1 mg m3Total volatile non-substituted hydrocarbons (vapour or gas) as methane equivalent 30 ml m3(ppm) Total chlorofl
48、uorocarbons and halogenated hydrocarbons 2 ml m3(ppm) Other non-toxic gasesa10 % to 20 % by volume 20 % by volume (Stated a 0,25 b) % (Stated a 0,5 b) % (Stated a 1,0 b) % Helium Remainder Water 15 mg m3Carbon dioxide 5 ml m3(ppm) Carbon monoxide 0,2 ml m3(ppm) Oil 0,1 mg m3Total volatile non-substi
49、tuted hydrocarbons (vapour or gas) as methane equivalent 30 ml m3(ppm) Hydrogen 10 ml m3(ppm) Other non-toxic gases c10 % to 20 % by volume 20 % by volume (Stated a 0,25 b) % (Stated a 0,5 b) % (Stated a 1,0 b) % Helium (Stated a 1,0 b) % Nitrogen Remainder Water 15 mg m3Carbon dioxide 5 ml m3(ppm) Carbon monoxide 0,2 ml m3(ppm) Oil 0,1 mg m3Total volatile no
copyright@ 2008-2019 麦多课文库（www.mydoc123.com）网站版权所有
备案/许可证编号：苏ICP备17064731号-1