SIST EN 250:2014
(Main)Respiratory equipment - Open-circuit self-contained compressed air diving apparatus - Requirements, testing, marking
Respiratory equipment - Open-circuit self-contained compressed air diving apparatus - Requirements, testing, marking
EN 250 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 apparatus down to a maximum depth of 50 m.
Atemgeräte - Autonome Leichttauchgeräte mit Druckluft - Anforderungen, Prüfung, Kennzeichnung
Diese Europäische Norm gilt für Leichttauchgeräte mit Druckluft und ihre Baugruppen. Der Zweck dieser Europäischen Norm ist, ein Mindestmaß an Sicherheit für den Einsatz der Geräte bis zu einer maximalen Tiefe von 50 m sicherzustellen. Laborprüfungen und praktische Leistungsprüfungen sind enthalten, um die Übereinstimmung mit den Anforderungen feststellen zu können.
Appareils respiratoires - Appareils de plongée autonomes à air comprimé et à circuit ouvert - Exigences, essai, marquage
La présente Norme européenne s'applique aux appareils respiratoires autonomes à air comprimé et à circuit ouvert pour la plongée et à leurs sous-ensembles.
La présente Norme européenne vise à assurer un niveau minimal de sécurité dans le fonctionnement des appareils jusqu’à une profondeur maximale de 50 m.
Elle contient des essais en laboratoire et des essais pratiques de performances pour s'assurer de la conformité aux exigences.
Oprema za dihanje - Potapljaški dihalni aparat z odprtim krogom na stisnjen zrak - Zahteve, preskušanje, označevanje
Standard EN 250 določa minimalne zahteve za potapljaške dihalne aparate z odprtim krogom na stisnjen zrak in njihove podsklope za zagotavljanje najmanjše ravni varnega delovanja aparatov na globini do 50 m.
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Atemgeräte - Autonome Leichttauchgeräte mit Druckluft - Anforderungen, Prüfung, KennzeichnungAppareils respiratoires - Appareils de plongée autonomes à air comprimé et à circuit ouvert - Exigences, essai, marquageRespiratory equipment - Open-circuit self-contained compressed air diving apparatus - Requirements, testing, marking13.340.30Varovalne dihalne napraveRespiratory protective devicesICS:Ta slovenski standard je istoveten z:EN 250:2014SIST EN 250:2014en,fr,de01-julij-2014SIST EN 250:2014SLOVENSKI
STANDARDSIST EN 250:2000/A1:2006SIST EN 250:20001DGRPHãþD
SIST EN 250:2014
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE 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 - Appareils de plongée autonomes à air comprimé et à circuit ouvert - Exigences, essai et marquage
Atemgeräte - Autonome Leichttauchgeräte mit Druckluft - Anforderungen, Prüfung und Kennzeichnung This European Standard was approved by CEN on 3 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 national 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 language 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, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 250:2014 ESIST EN 250:2014
EN 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 emergency 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 Exhalation 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 assembly . 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 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 . 20 5.12 Resistance to temperature . 21 5.12.1 Storage . 21 5.12.2 Performance . 21 5.12.3 Cold water performance . 21 SIST EN 250:2014
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 6.2.1 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 medium 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 6.5.7 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 water 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 . 31 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 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 SIST EN 250:2014
EN 250:2014 (E) 4 8 Information supplied by the manufacturer . 35 Annex A (informative)
Requirement clauses and corresponding 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 technical 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
SIST EN 250:2014
EN 250:2014 (E) 5 Foreword This document (EN 250:2014) 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 October 2014, and conflicting national standards 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 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 of 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, 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, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 250:2014
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 part 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 similar to those of the complete apparatus. SIST EN 250:2014
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 apparatus 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 referenced 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 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 connections 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-contained, 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 breathing 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 wearer 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 the cylinder(s) and any pressure reducer 3.3 medium pressure pressure between the pressure reducer and the demand valve SIST EN 250:2014
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 the 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 inhalation 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 Respiratory 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 during 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 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 wearer’s 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 chin which may be fitted with either a mouthpiece or an inner mask SIST EN 250:2014
EN 250:2014 (E) 9 3.16 oro-nasal half mask facepiece, covering mouth, nose and chin and retained by straps 3.17 dead space volume of the cavity formed between the mouth and the inhalation and exhalation parts 3.18 package of air cylinder(s) assembly of one or more air cylinders with cylinder valve(s) and a carrying frame (if applicable) 3.19 demand regulator device which consists of a pressure reducer connected to a demand valve that is fitted to a facepiece 3.20 demand valve that part of a demand regulator which reduces the medium pressure air to approximately ambient pressure 3.21 carrying system carrying frame or holding device for air cylinder(s) with possibility to mount the harness (if applicable) 3.22 pressure reducer that part of a demand regulator which reduces the high pressure air to medium pressure 3.23 auxiliary emergency breathing system additional breathing system as part of the apparatus Note 1 to entry: This can also be referred to as an octopus. 3.24 upstream demand valve demand valve that will close and not let gas out with an increasing medium pressure 3.25 downstream demand valve demand valve that will open and let gas out with an increasing medium pressure 3.26 dive/pre-dive control switch on the demand regulator that in the pre-dive position prevents free-flow when not connected to the respiratory tract 3.27 hose assembly hose with an interface connection at each end that are intended to be fitted to other interfaces 3.28 breathing hose flexible hose that contains air at approximately ambient pressure SIST EN 250:2014
EN 250:2014 (E) 10 4 Minimum equipment The apparatus consists of sub-assemblies. During use the sub-assemblies shall comprise at least: a) cylinder(s) with cylinder valve(s); b) demand regulator; c) pressure indicator; d) facepiece; e) carrying system. The apparatus shall also be delivered with information supplied by the manufacturer. Any further sub-assembly which is integral to the apparatus shall comply with the relevant requirements of this European Standard. The apparatus may also include the following sub-assemblies: f) auxiliary breathing system; g) lifting harness; h) depth/time measuring device; i) additional safety device(s); j) voice communication system. 5 Requirements 5.1 Design The apparatus and sub-assemblies shall be so designed that its components are located so that it is possible to perform the required pre-dive functional checks. The combination of sub-assemblies shall not adversely affect the safe operation and use of the apparatus. The apparatus and sub-assemblies shall not have any projecting parts or corners and edges which may injure the diver. All parts, which have to be manually actuated during use, shall be accessible and controllable even when wearing protective gloves (three fingers, with 6 mm to 7 mm padding on either side). These parts shall be designed such that their setting cannot be altered inadvertently during use. Check compliance by visual inspection (see 6.3) and test in accordance with 6.14. 5.2 Auxiliary emergency breathing system If the manufacturer allows more than one diver to use the apparatus at the same time, to protect the diver, the requirements of Annex B shall apply. SIST EN 250:2014
EN 250:2014 (E) 11 All applicable requirements and tests of this standard shall be applied to each demand regulator when used and tested alone. Test in accordance with Annex B. 5.3 Materials Materials that may come into contact with the wearer’s skin, mouth and/or the respir
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