SIST EN 144-3:2003
(Main)Respiratory protective devices - Gas cylinder valves - Part 3: Outlet connections for diving gases Nitrox and oxygen
Respiratory protective devices - Gas cylinder valves - Part 3: Outlet connections for diving gases Nitrox and oxygen
This European Standard is applicable to a thread connection used for the connection between a gas cylinder valve and a pressure reducer for respiratory equipment for diving containing breathable nitrox gas with an oxygen content greater than 22 % or oxygen. This European Standard specifies the dimensions and tolerances for connections which are used for respiratory equipment.
Atemschutzgeräte - Gasflaschenventile - Teil 3: Gewindeverbindungen am Ausgangsstutzen für die Tauchgase Nitrox und Sauerstoff
Appareils de protection respiratoire - Robinets de bouteille a gaz - Partie 3: Raccords de sortie pour gaz de plongée Nitrox et oxygene
La présente Norme européenne s'applique aux raccords filetés utilisés pour le raccordement entre un robinet de bouteille à gaz et un réducteur de pression, sur les appareils de plongée à nitrox respirable ayant une teneur en oxygène supérieure à 22 % ou sur les appareils à oxygène. La présente Norme européenne spécifie les dimensions et les tolérances relatives aux raccords utilisés pour les appareils de protection respiratoire..
Oprema za varovanje dihal - Ventili za plinske jeklenke - 3. del: Izhodni priključki za potapljaška plina Nitrox in kisik
General Information
- Status
- Published
- Publication Date
- 31-Aug-2003
- Technical Committee
- OVP - Personal protecting equipment
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Sep-2003
- Due Date
- 01-Sep-2003
- Completion Date
- 01-Sep-2003
Relations
- Effective Date
- 01-Feb-2004
Overview
EN 144-3:2003 - Respiratory protective devices - Gas cylinder valves - Part 3: Outlet connections for diving gases Nitrox and oxygen (CEN) defines the threaded outlet connections used between a gas cylinder valve and a pressure reducer for diving respiratory equipment containing breathable Nitrox (O2 > 22%) or oxygen. The standard specifies the dimensions, tolerances and marking required to ensure safe, reliable and interoperable connections for diving cylinder valves at specified pressure ranges.
Key topics
- Scope: Connection between cylinder valve and pressure reducer for diving gases (Nitrox, oxygen).
- Pressure ranges: Two nominal pressure classes are addressed:
- Nominal 200 bar (for cylinders with maximum filling pressure up to 250 bar)
- Nominal 300 bar (for cylinders with maximum filling pressure between 250 and 350 bar)
- Dimensional specifications: Detailed drawings and dimensional tolerances (typically ±0.1 mm unless otherwise stated) for the threaded outlet, connector, handwheel and O‑ring interfaces.
- Marking requirements: Valve outlet connection must be permanently marked with "200" or "300" to identify the nominal pressure class.
- Normative references: Incorporates EN 144-1 (threads for insert connectors) and references applicable regulatory provisions.
- Regulatory context: Prepared by CEN and supports essential requirements of EU Directive 89/686/EEC for personal protective equipment (see informative Annex ZA).
- Transitional considerations: Recognises a phased implementation to accommodate existing national thread designs.
Applications
EN 144-3:2003 is practical and directly applicable where consistent, safe connections for breathing gas cylinders are critical:
- Ensures interchangeability of valves and pressure reducers across manufacturers and countries.
- Guides design and manufacture of gas cylinder valves, connectors and service parts for Nitrox and oxygen diving equipment.
- Informs quality control, inspection and testing procedures in production and overhaul facilities.
- Serves procurement specifications for dive centres, professional diving operations and safety regulators seeking compliance with European standards.
- Supports certification bodies and conformity assessment against PPE-related directives.
Who uses this standard
- Valve and cylinder manufacturers
- Diving equipment designers and OEMs
- Repair/maintenance workshops and service technicians
- Certification and conformity assessment bodies
- Dive centres, professional divers and procurement/specification teams
Related standards
- EN 144-1 (Respiratory protective devices - Gas cylinder valves - Part 1: Thread connections for insert connectors)
- Other parts of EN 144 series and CEN guidance on respiratory protective devices and gas cylinder fittings
EN 144-3:2003 provides a concise, engineering-focused specification to improve safety, compatibility and traceability of Nitrox and oxygen cylinder outlet connections used in diving respiratory equipment.
Frequently Asked Questions
SIST EN 144-3:2003 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Respiratory protective devices - Gas cylinder valves - Part 3: Outlet connections for diving gases Nitrox and oxygen". This standard covers: This European Standard is applicable to a thread connection used for the connection between a gas cylinder valve and a pressure reducer for respiratory equipment for diving containing breathable nitrox gas with an oxygen content greater than 22 % or oxygen. This European Standard specifies the dimensions and tolerances for connections which are used for respiratory equipment.
This European Standard is applicable to a thread connection used for the connection between a gas cylinder valve and a pressure reducer for respiratory equipment for diving containing breathable nitrox gas with an oxygen content greater than 22 % or oxygen. This European Standard specifies the dimensions and tolerances for connections which are used for respiratory equipment.
SIST EN 144-3:2003 is classified under the following ICS (International Classification for Standards) categories: 13.340.30 - Respiratory protective devices. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 144-3:2003 has the following relationships with other standards: It is inter standard links to SIST EN 144-3:2003/AC:2004. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN 144-3:2003 is associated with the following European legislation: EU Directives/Regulations: 2016/425, 89/686/EEC, 93/68/EEC, 93/95/EEC, 96/58/EC; Standardization Mandates: M/031. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
SIST EN 144-3:2003 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Atemschutzgeräte - Gasflaschenventile - Teil 3: Gewindeverbindungen am Ausgangsstutzen für die Tauchgase Nitrox und SauerstoffAppareils de protection respiratoire - Robinets de bouteille a gaz - Partie 3: Raccords de sortie pour gaz de plongée Nitrox et oxygeneRespiratory protective devices - Gas cylinder valves - Part 3: Outlet connections for diving gases Nitrox and oxygen13.340.30Varovalne dihalne napraveRespiratory protective devicesICS:Ta slovenski standard je istoveten z:EN 144-3:2003SIST EN 144-3:2003en01-september-2003SIST EN 144-3:2003SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 144-3February 2003ICS 13.340.30English versionRespiratory protective devices - Gas cylinder valves - Part 3:Outlet connections for diving gases Nitrox and oxygenAppareils de protection respiratoire - Robinets de bouteilleà gaz - Partie 3: Raccords de sortie pour gaz de plongéeNitrox et oxygèneAtemschutzgeräte - Gasflaschenventile - Teil 3:Gewindeverbindungen am Ausgangsstutzen für dieTauchgase Nitrox und SauerstoffThis European Standard was approved by CEN on 21 November 2002.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, Slovak Republic, Spain, Sweden, Switzerland andUnited Kingdom.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 144-3:2003 ESIST EN 144-3:2003
Clauses of this European Standard addressing essential requirements or otherprovisions of EU Directives.8SIST EN 144-3:2003
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