SIST EN 14143:2003

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Respiratory equipment - Self-contained re-breathing diving apparatusOprema za dihala – Samoreševalni dihalni potapljaški aparatiAppareils de protection respiratoire - Appareils de plongée autonomes a circuit ferméAtemgeräte - Autonome Regenerationstauchgeräte13.340.30Varovalne dihalne napraveRespiratory protective devicesICS:SIST EN 14143:2003enTa slovenski standard je istoveten z:EN 14143:200301-december-2003SIST EN 14143:2003SLOVENSKI
STANDARD







EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14143September 2003ICS 13.340.30English versionRespiratory equipment - Self-contained re-breathing divingapparatusApareils respiratoires - Appareils de plongée autonomes àcircuit ferméAtemgeräte - Autonome RegenerationstauchgeräteThis European Standard was approved by CEN on 7 August 2003.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the 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 translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and UnitedKingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2003 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14143:2003 E



EN 14143:2003 (E)2ContentspageForeword.51Scope.72Normative references.73Terms and definitions.84Minimum equipment.95Requirements.95.1Design.95.2Materials.105.3Pressure vessel(s).105.4Pressure vessel valve(s).105.5High and medium pressure parts and connections.115.5.1General.115.5.2Pressure reducer (if fitted).115.5.3Pressure relief system(s).115.6Breathing circuit.115.6.1Performance requirements.115.6.2Inhalation and exhalation valves.135.6.3Breathable volume.135.6.4Breathing circuit burst pressure.145.6.5Exhaust valve.145.6.6Carbon dioxide absorbent canister.145.6.7Inhalation temperature.145.7Gas control or supply system.145.7.1Inspired partial pressure of oxygen.145.7.2Oxygen partial pressure setpoint maintenance.155.7.3Display for inspired partial pressure of oxygen (if fitted).155.7.4Gas endurance.155.8Hoses.155.8.1General.155.8.2Tensile strength of high and medium pressure hoses.155.8.3Flexibility of high and medium pressure hoses.155.8.4High pressure hose assemblies leak test.165.8.5High pressure hose assemblies bursting pressure.165.8.6Medium pressure hose assemblies leak test.165.8.7Medium pressure hose assemblies bursting pressure.165.8.8Breathing hose.165.9Safety devices.165.9.1General.165.9.2Pressure indicator.175.9.3Monitors for inspired gases.175.9.4Active warning devices.185.10Facepiece.185.10.1General.185.10.2Facepiece harness.185.10.3Connection.195.10.4Eyepiece and visors.195.11Body harness.195.12Emergency breathing system.205.13Electrical systems.20



EN 14143:2003 (E)35.13.1Functional safety.205.13.2Programmable systems.205.13.3Electromagnetic compatibility (EMC).205.14Resistance to temperature.205.14.1Storage.205.14.2Leakage.205.15Cleaning and disinfecting.205.16Connectors.215.17Practical Performance.215.18Oxygen compatibility.215.19Pressure resistance of casings and monitors.216Testing.216.1General.216.1.1Procedure.216.1.2Nominal values and tolerances.216.1.3Test equipment and test procedures.226.2Visual Inspection.226.3Breathing circuit.226.3.1General test conditions.226.3.2Breathing performance.226.3.3Volume weighted average inspired carbon dioxide.236.4Hydrostatic imbalance.236.5Breathable volume.236.5.1Volume.236.5.2Breathing circuit burst pressure test.236.5.3Exhaust valve.236.5.4Inhalation and exhalation valves.246.6Apparatus endurance.246.6.1General.246.6.2Carbon dioxide absorption endurance.246.6.3Gas endurance.246.7Inspired oxygen level.256.8Hoses assemblies.256.8.1Tensile strength of high and medium pressure hose assemblies.256.8.2Flexibility of high and medium pressure hoses.256.8.3Leak test of high and medium pressure hose assemblies.256.8.4Burst pressure of high and medium pressure hose assemblies.256.8.5Flexibility of breathing hoses.256.8.6Permanent axial deformation of breathing hoses.256.9Burst pressure of high and medium pressure parts.266.10Safety devices.266.10.1Pressure indicator.266.10.2Monitor for inspired partial pressure of oxygen.266.10.3Monitor for inspired partial pressure of carbon dioxide.266.10.4Active warning devices.266.10.5Pressure relief system(s).276.11Facepiece.276.11.1Mechanical strength of the facepiece.276.11.2Field of vision.276.11.3Impact resistance of the eyepiece(s) or visor(s).276.11.4Facepiece harness.276.12Electrical systems, Electromagnetic compatibility (EMC).276.13Resistance to temperature.286.13.1Testing at - 20 °C and + 50 °C.286.13.2Testing after storage at - 30 °C and + 70 °C.286.14Cleaning and disinfection.286.15Practical performance.286.15.1General.286.15.2Test subjects.28



EN 14143:2003 (E)46.15.3Basic testing.296.15.4Functional testing when diving.296.15.5Report.296.16Oxygen pressure surge test.296.17Sea water resistance.307Marking.318Information supplied by manufacturer.31Annex A (informative)
Artificial sea water.44Annex ZA (informative)
Clauses of this European Standard addressing essential requirements orother provisions of EU Directives.45Bibliography.46



EN 14143:2003 (E)5ForewordThis document (EN 14143:2003) has been prepared by Technical Committee CEN/TC 79 “Respiratoryprotective 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 identicaltext or by endorsement, at the latest by March 2004, and conflicting national standards shall be withdrawn atthe latest by March 2004.This document has been prepared under a mandate given to CEN by the European Commission and theEuropean 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.In this European Standard the annex A is informative.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark,Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands,Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and the United Kingdom.



EN 14143:2003 (E)6IntroductionA given self-contained re-breathing diving apparatus can only be approved when the apparatus or apparatussub-assemblies satisfy the requirements of the tests specified in this standard, and practical performancetests have been carried out successfully on complete apparatus where specified in the standard.The production of the standard has raised new questions regarding the interpretation of the physiological andequipment acceptance limits for the diving application which have not been fully answered. However, thisstandard has been published to provide a level of safety for re-breathing diving apparatus.



EN 14143:2003 (E)71 ScopeThis European Standard specifies minimum requirements for self-contained re-breathing diving apparatus toensure a minimum level of safe operation of the apparatus. It applies to the following: a maximum depth of 6 m for apparatus using pure oxygen; a maximum depth of 40 m for apparatus using oxygen in nitrogen gas mixtures; a maximum depth of 100 m for apparatus using oxygen and helium or oxygen, nitrogen and helium gasmixtures; water temperatures between 4 °C and 34 °C.The requirements of this standard are intended to take account of the interaction between the wearer, theapparatus, and where possible the environment in which the apparatus is likely to be used. See annex ZA.2 Normative referencesThis European Standard incorporates 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 listedhereafter. For dated references, subsequent amendments to or revisions of any of these publications apply tothis European Standard only when incorporated in it by amendment or revision. For undated references thelatest edition of the publication referred to applies (including amendments).EN 132:1998, Respiratory protective devices - Definitions of terms and pictogramsEN 134:1998, Respiratory protective devices - Nomenclature of componentsEN 144-1, Respiratory protective devices - Gas cylinder valves – Part 1: Thread connections for insertconnectorEN 144-3, Respiratory protective devices – Gas cylinder valves – Part 3: Outlet connections for diving gasesNitrox and oxygenEN 250, Respiratory equipment - Open circuit self contained compressed air diving apparatus - Requirements,testing and markingEN 12021, Respiratory protective devices - Compressed air for breathing apparatusEN 61000-6-1, Electromagnetic compatibility - Part 6-1:Generic standards; Immunity for residential,commercial and light industrial environmentsISO/IEC 12207, Information technology – Software life cycle processIEC 61508 (all parts), Functional safety of electrical/electronic/programmable electronic safety-related systemsIEC 60300-3-6, Dependability management - Part 3: Application guide - Section 6: Software aspects ofdependability



EN 14143:2003 (E)83 Terms and definitionsFor the purpose of this European Standard the terms and definitions given in EN 132:1998 and thenomenclature given in EN 134:1998 apply together with the following:3.1 self-contained re-breathing diving apparatusapparatus that has a supply of gas carried by the diver, allowing the diver to breathe under waterThe apparatus is designed and constructed to enable the diver to inspire gas from a facepiece connected to acounterlung and to pass exhaled gas through a carbon dioxide absorption material before it is re-breathedfrom the counterlung. The inspired partial pressure of the gases within the apparatus remain within acceptablephysiological limits. The gas is thus re-circulated within the apparatus.A self-contained re-breathing diving apparatus may also be called a diving Re-breather.3.2 high pressurethe pressure inside the pressure vessel(s) and between the pressure vessel(s) and any pressure reducer3.3 medium pressurethe pressure between the pressure reducer and a gas control systemNOTEThis is sometimes referred to as intermediate pressure.3.4 low pressurethe pressure within the facepiece, breathing hoses, counterlung and absorbent canister, i.e. approximatelyambient pressure3.5 respiratory pressurethe differential pressure in the facepiece relative to the no flow pressures in the facepiece at the end ofinhalation and exhalation (see Figure 1)3.6 rated working pressurethe maximum working pressure of the respective components3.7 hydrostatic imbalancethe difference at end exhalation “no flow” between the pressure within the facepiece (see Figure 1) and that atthe reference point which could either be the suprasternal notch or the lung centroid of the diver (see Figure 2)3.8 displaced (tidal) volumethe volume of respirable gas displaced by the breathing simulator during one half cycle (inhalation orexhalation) measured in l3.9 breathing frequencythe setting of the breathing simulator measured in cycles per minute3.10 respiratory minute volume (RMV)the product of the tidal volume and breathing frequency measured in litres per minute3.11 pressure volume diagramthe diagram generated during one breathing cycle by plotting the respiratory pressure against the displacedvolume (see Figure 1)3.12 work of breathingthe work expended during one breathing cycle measured in Joule per litre. This work is proportional to thearea bounded by the pressure volume diagram (see Figure 1)3.13 breathing hoseflexible low pressure hose(s) connecting the facepiece to either the counterlung(s) or absorbent canister



EN 14143:2003 (E)93.14 counterlungvariable volume container for the diver to inhale from and exhale to3.15 absorbent canistercontainer of absorbent materials which will remove carbon dioxide from the gas passing through them3.16 dead spacethe volume of the cavity formed between the mouth and the inhalation and exhalation parts3.17 body harnesscomponent of the re-breather to attach the apparatus to the body of the diver3.18 facepiecedevice for connecting the apparatus to the wearer. It may be a mouthpiece assembly, a diving half mask or afull face mask4 Minimum equipmentThe apparatus shall comprise at least the following components: breathing circuit comprising e.g. facepiece, breathing hose(s), counterlung(s), exhaust valve, absorbentcanister; gas control or supply system; gas supply pressure vessel(s); safety device(s); body harness.It shall also be delivered with information supplied by the manufacturer.5 Requirements5.1 DesignThe manufacturer shall support the apparatus design by the provision of a failure mode effect and criticalityanalysis (FMECA).The apparatus shall be designed and its components and parts located to provide protection againstmechanical damage caused by external influence and to ensure that it is possible to perform the required pre-dive functional checks.The combination of components and parts shall not adversely affect the safe operation and use of theapparatus, e.g. by incorrect connection of the hoses to the breathing circuit.The apparatus shall not have any sharp edges or protrusions that can injure the diver.All parts, which have to be actuated by the diver during use, shall be accessible and controllable even whenwearing protective gloves (three fingers, with 6 mm to 7 mm padding on either side). They shall be designedsuch that their setting cannot be altered inadvertently during use.The apparatus shall function satisfactorily out of the water and in all orientations in the water.



EN 14143:2003 (E)10The apparatus shall be designed to prevent any chemicals used within the apparatus, saliva, condensation oringress of water from adversely affecting the operation of the apparatus or causing harmful effect to the diverwhen used according to the information supplied by the manufacturer.Any part of the equipment intended for high pressure gas with an oxygen content greater than air as specifiedin EN 12021 shall be designed and selected for use with high pressure oxygen.If the apparatus is intended for use in water temperatures less than 4 °C the manufacturer shall state theminimum temperature and its performance shall be tested at that temperature.Testing shall be done in accordance with 6.2, 6.15 and 6.16.5.2 MaterialsThe parts used shall have adequate mechanical strength, durability and resistance to wear and featuresufficient resistance to changes caused by the effect of temperature individually and when assembled.Any materials that may come into contact with a high pressure gas with an oxygen content greater than air asspecified in EN 12021 shall be compatible for use with high pressure oxygen.Materials that come into direct contact with the wearer's skin and the respirable gas shall not be known to belikely to cause irritation or any other adverse effect to health.Any material that may come into contact with sea water shall be sea water resistant.After testing in accordance with 6.17 the apparatus shall still be fully functional.Testing shall be done in accordance with 6.2, 6.8, 6.9, 6.13, 6.14, 6.15, 6.16 and 6.17.5.3 Pressure vessel(s)The pressure vessel(s) shall comply with regulations appropriate to the country of use and shall be approvedand tested with respect to the rated working pressure and the use of elevated oxygen content if appropriate.The pressure vessel(s) shall be marked with the appropriate neck thread designation according to EN 144-1where the preferred versions are M 18 x 1,5 and M 25 x 2.Test
...