1、July 2014 Translation by DIN-Sprachendienst.English price group 17No 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 1
2、3.340.30!%7Ay“2203086www.din.deDDIN EN 250Respiratory equipment Open-circuit self-contained compressed air diving apparatus Requirements, testing and marking;English version EN 250:2014,English translation of DIN EN 250:2014-07Atemgerte Autonome Leichttauchgerte mit Druckluft Anforderungen, Prfung u
3、nd Kennzeichnung;Englische Fassung EN 250:2014,Englische bersetzung von DIN EN 250:2014-07Appareils respiratoires Appareils de plonge autonomes air comprim et circuit ouvert Exigences, essai et marquage;Version anglaise EN 250:2014,Traduction anglaise de DIN EN 250:2014-07SupersedesDIN EN 250:2006-0
4、8www.beuth.deDocument comprises 45 pagesIn case of doubt, the German-language original shall be considered authoritative.06.14 DIN EN 250:2014-07 2 A comma is used as the decimal marker. National foreword This standard includes safety requirements. This document (EN 250:2014) has been prepared by Te
5、chnical Committee CEN/TC 79 “Respiratory protective devices”, Subcommittee SC 7 “Diving apparatus” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was the Normenausschuss Feinmechanik und Optik (Optics and Precision Mechanics Standards Committee), Working Committ
6、ee NA 027-02-08 AA Tauchgerte. Amendments This standard differs from DIN EN 250:2006-08 as follows: a) requirements concerning the auxiliary breathing system have been included; b) requirements on the demand regulator have been changed; c) the upper limit of test temperatures has been increased to 5
7、5 C; d) functional testing has been aligned with EN 14143; e) marking on the demand regulator has been specified; f) requirements and testing have been clearly separated. Previous editions DIN 58640-1: 1976-05, 1986-01 DIN 58640-2: 1979-03, 1985-08 DIN 58641-1: 1981-09 DIN 58641-2: 1983-06 DIN EN 25
8、0: 1993-05, 2000-03, 2006-08 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 250 April 2014 ICS 13.340.30 Supersedes EN 250:2000English Version Respiratory equipment - Open-circuit self-contained compressed air diving apparatus - Requirements, testing and marking Appareils respiratoires - Appar
9、eils de plonge autonomes air comprim et circuit ouvert - Exigences, essai et marquage Atemgerte - Autonome Leichttauchgerte mit Druckluft - Anforderungen, Prfung und Kennzeichnung This European Standard was approved by CEN on 3 February 2014. CEN members are bound to comply with the CEN/CENELEC Inte
10、rnal 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 CEN-CENELEC Management Centre or to any
11、 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 CEN-CENELEC Management Centre has the same status as the official ve
12、rsions. 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, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway
13、, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploit
14、ation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 250:2014 EEN 250:2014 (E) 2 Contents Page Foreword 5 Introduction .6 1 Scope 7 2 Normative references 7 3 Terms and definitions .7 4 Minimum equipment . 10 5 Requirements 10 5.1 Design 10 5.2 Auxiliary emerge
15、ncy breathing system 10 5.3 Materials 11 5.4 Air cylinder(s) 11 5.5 Cylinder valves 11 5.6 High pressure parts and connections 12 5.7 Demand regulator performance 13 5.7.1 General . 13 5.7.2 Cold water 14 5.7.3 Pressure reducer 14 5.7.4 Pressure relief system . 14 5.7.5 Demand valve 14 5.7.6 Exhalat
16、ion valve 14 5.8 Hose assemblies . 15 5.8.1 Tensile strength of high and medium pressure hose assemblies that may be subjected to external tensile force 15 5.8.2 Flexibility of high and medium pressure hoses 15 5.8.3 Leakage of high pressure hose assembly . 15 5.8.4 Leakage of medium pressure hose a
17、ssembly . 15 5.8.5 Burst pressure of high pressure hose assembly 15 5.8.6 Burst pressure of medium pressure hose assembly 16 5.8.7 Kinking of medium pressure hoses 16 5.8.8 Breathing hose 16 5.8.9 Length and arrangement of medium pressure hose assembly . 16 5.9 Safety devices . 16 5.9.1 General . 16
18、 5.9.2 Pressure indicator 17 5.9.3 Reserve valve (if fitted) 18 5.9.4 Other active warning devices 18 5.10 Facepiece . 18 5.10.1 General . 18 5.10.2 Inspired carbon dioxide . 19 5.10.3 Mouthpiece assembly 19 5.10.4 Head harness 19 5.10.5 Full face mask or oro-nasal half mask . 19 5.11 Body harness 2
19、0 5.12 Resistance to temperature . 21 5.12.1 Storage . 21 5.12.2 Performance 21 5.12.3 Cold water performance . 21 DIN EN 250:2014-07 EN 250:2014 (E) 3 5.13 Cleaning and disinfection . 21 5.14 Seawater resistance 21 5.15 Practical performance . 21 6 Testing 22 6.1 General . 22 6.2 Procedure . 22 6.2
20、.1 General . 22 6.2.2 Nominal values and tolerances 22 6.2.3 Breathable air . 22 6.2.4 Test equipment and calibration test procedures . 22 6.3 Visual inspection . 23 6.4 High and medium pressure parts and connections 23 6.5 Hose assemblies . 24 6.5.1 General . 24 6.5.2 Tensile strength of high and m
21、edium pressure hose assemblies that may be subjected to external tensile force . 24 6.5.3 Flexibility of high and medium pressure hoses . 24 6.5.4 Leakage of high pressure hose assembly 24 6.5.5 Leakage of medium pressure hose assembly 24 6.5.6 Burst pressure of high pressure hose assembly . 24 6.5.
22、7 Burst pressure of medium pressure hose assembly 24 6.5.8 Kinking of medium pressure hoses 24 6.5.9 Tensile load of breathing hose connections 24 6.6 Pressure relief system 24 6.6.1 Upstream demand valve . 24 6.6.2 Downstream demand valve 25 6.7 Demand regulator 25 6.7.1 General . 25 6.7.2 Cold wat
23、er performance . 25 6.8 Exhalation valve 26 6.9 Cylinder valve 26 6.10 Facepiece . 26 6.10.1 Mouthpiece . 26 6.10.2 Full face mask or oro-nasal half mask 26 6.10.3 Head harness . 30 6.11 Safety devices 30 6.11.1 Pressure indicator . 30 6.11.2 Reserve valve . 31 6.11.3 Other active warning device . 3
24、1 6.12 Resistance to specific temperatures . 31 6.12.1 Testing after storage at +70 C . 31 6.12.2 Testing after storage at 30 C . 31 6.12.3 Testing at +55 C . 32 6.12.4 Testing at 20 C . 32 6.13 Seawater resistance 32 6.14 Practical performance . 32 6.14.1 General . 32 6.14.2 Test subjects 32 6.14.3
25、 Basic testing 32 6.14.4 Functional testing when diving 33 6.14.5 Pass/fail criteria . 34 6.14.6 Report . 34 7 Marking . 34 7.1 General . 34 7.2 Demand regulator 35 DIN EN 250:2014-07 EN 250:2014 (E) 4 8 Information supplied by the manufacturer 35 Annex A (informative) Requirement clauses and corres
26、ponding test clauses of this European Standard . 37 Annex B (normative) Auxiliary emergency breathing system . 39 B.1 General . 39 B.2 Requirements 39 B.3 Testing . 39 B.4 Practical performance test . 40 Annex C (informative) Artificial seawater 41 Annex D (informative) Details of significant techni
27、cal changes between this European Standard and the previous edition 42 Annex ZA (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 89/686/EEC . 43 DIN EN 250:2014-07 EN 250:2014 (E) 5 Foreword This document (EN 250:2014) has been prepared by Tech
28、nical 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 standard
29、s shall be withdrawn at the latest by October 2014. This document supersedes EN 250:2000. Annex D 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
30、 European Free Trade Association, and supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document. Attention is drawn to the possibility that some of the elements of this document may be the subject o
31、f patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgari
32、a, 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, Turke
33、y and the United Kingdom. DIN EN 250:2014-07 EN 250:2014 (E) 6 Introduction A given self-contained open-circuit compressed air underwater breathing apparatus can only be approved when the individual components satisfy the requirements of the test specification which may be a complete standard or par
34、t of a standard, and practical performance tests have been carried out successfully on complete apparatus where specified in the appropriate standard. If for any reason a complete apparatus is not tested then simulation of the apparatus is permitted provided the respiratory characteristics are simil
35、ar to those of the complete apparatus. DIN EN 250:2014-07 EN 250:2014 (E) 7 1 Scope This European Standard specifies minimum requirements for self-contained open-circuit compressed air underwater breathing apparatus and their sub-assemblies to ensure a minimum level of safe operation of the apparatu
36、s down to a maximum depth of 50 m. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the refer
37、enced document (including any amendments) applies. EN 144-1, Respiratory protective devices - Gas cylinder valves - Part 1: Thread connections for insert connector EN 148-1, Respiratory protective devices - Threads for facepieces - Part 1: Standard thread connection EN 148-2, Respiratory protective
38、devices - Threads for facepieces - Part 2: Centre thread connection EN 148-3, Respiratory protective devices - Threads for facepieces - Part 3: Thread connection M 45 x 3 EN 12021, Respiratory protective devices - Compressed air for breathing apparatus EN ISO 12209, Gas cylinders - Outlet connection
39、s for gas cylinder valves for compressed breathable air (ISO 12209) ISO 263, ISO inch screw threads General plan and selection for screws, bolts and nuts Diameter range 0,06 to 6 in 3 Terms and definitions For the purposes of this document the following terms and definitions apply. 3.1 self-containe
40、d, open-circuit Compressed air Underwater Breathing Apparatus SCUBA apparatus which has a portable supply of compressed air carried by the diver, allowing him to breathe under water and exhale into the ambient water Note 1 to entry: The self-contained, open-circuit compressed air underwater breathin
41、g apparatus, when ready to use, consists of a number of compatible sub-assemblies each of which complies with the appropriate requirements of this standard. When connected together, the complete self-contained, open-circuit compressed air underwater breathing apparatus is designed to enable the wear
42、er to breathe air on demand from a high pressure cylinder (or cylinders) via a demand regulator connected to a facepiece. The exhaled air passes, without recirculation, from the demand regulator via the exhalation valve to ambient water. 3.2 high pressure pressure inside the cylinder(s) and between
43、the cylinder(s) and any pressure reducer 3.3 medium pressure pressure between the pressure reducer and the demand valve DIN EN 250:2014-07 EN 250:2014 (E) 8 3.4 rated working pressure maximum working pressure of the respective components 3.5 reference pressure equilibrium pressure which exists in th
44、e face piece when there is no respiratory flow at the end of exhalation 3.6 respiratory pressure differential pressure in the face piece relative to the reference pressure measured during inhalation and exhalation 3.7 opening negative pressure (cracking pressure) respiratory pressure during inhalati
45、on required to open the inhalation valve 3.8 displaced (tidal) volume volume of breathing gas displaced by the breathing simulator during one half cycle (inhalation or exhalation) measured in litres 3.9 breathing frequency setting of the breathing simulator measured in cycles per minute 3.10 Respira
46、tory Minute Volume (RMV) product of the tidal volume and breathing frequency measured in litres per minute 3.11 pressure volume diagram diagram generated during one breathing cycle by plotting the respiratory pressure against the displaced volume 3.12 Work Of Breathing (WOB) external work expended d
47、uring one breath divided by the tidal volume of that breath, measured in Joule per litre, i.e. specific work Note 1 to entry: This is equivalent to volume average respiratory pressure (kPa). This work of breathing is, in general, proportional to the area bounded by the pressure volume diagram. Work
48、associated with positive pressures during inhalation does not count towards the total work of breathing. 3.13 facepiece device that connects the apparatus to the wearers respiratory tract and isolates the respiratory tract from the environment Note 1 to entry: It may be a mouthpiece assembly, an oro-nasal half mask or a full face mask. 3.14 mouthpiece assembly device usually held by the teeth, sealing against the lips and through which air is inhaled and exhaled 3.15 full face mask facepiece covering mouth, nose, eyes and ch
