prEN 13794

Respiratory protective devices - Self-contained closed-circuit devices for escape - Requirements, testing and marking

This European Standard specifies minimum requirements for self-contained closed-circuit breathing RPDs for escape (short: oxygen escape RPD):
-   chemical oxygen type,
-   Potassium superoxide (KO2),
-   Sodium chlorate (NaClO3) and
-    compressed oxygen type.
This European Standard does not apply to RPD for work and rescue and to diving apparatus.
Laboratory and practical performance tests are included for the assessment of compliance with the requirements.

Atemschutzgeräte - Isoliergeräte für Selbstrettung - Anforderungen, Prüfung und Kennzeichnung

Appareils de protection respiratoire - Appareils de protection respiratoire isolants autonomes à circuit fermé pour l'évacuation - Exigences, essais, marquage

La présente Norme européenne définit les exigences minimales applicables aux appareils de protection respiratoire isolants autonomes à circuit fermé utilisés dans le cadre d'évacuations (abrégés en APR d'évacuation à oxygène) :
-   à oxygène chimique,
-   à superoxyde de potassium (KO2),
-   à chlorure de sodium (NaClO3) et
-   à oxygène comprimé.
La présente Norme européenne ne s'applique ni aux APR pour le travail et le sauvetage, ni aux appareils de plongée.
Elle contient des essais en laboratoire et des essais pratiques de performance pour s'assurer de la conformité aux exigences.

Oprema za varovanje dihal - Samoreševalni avtonomni dihalni aparat z zaprtim krogom - Zahteve, preskušanje, označevanje

General Information

• Status: Not Published
• ICS: 13.340.30 - Respiratory protective devices
• Technical Committee: CEN/TC 79 - Respiratory protective devices
• Drafting Committee: CEN/TC 79/WG 6 - Self-contained breathing apparatus
• Current Stage: 3098 - Decision to reject - Consensus building
• Completion Date: 13-Oct-2015
• Mandate: M/031 - Standardization mandate to CEN/CENELEC concerning standards for Personal Protective Equipment
• Ref Project: oSIST prEN 13794:2014 - Respiratory protective devices - Self-contained closed-circuit devices for escape - Requirements, testing and marking

Overview

The prEN 13794 is a European standard developed by CEN focusing on respiratory protective devices (RPDs) specifically designed for escape situations. It defines the minimum requirements, testing, and marking of self-contained closed-circuit breathing apparatuses intended for emergency escape use. These devices supply oxygen through chemical oxygen sources or compressed oxygen for a temporary safe evacuation atmosphere. Importantly, this standard excludes RPDs designed for work, rescue operations, or diving.

This standard covers four primary types of oxygen escape respirators:

• Chemical oxygen type
• Potassium superoxide (KO2) based devices
• Sodium chlorate (NaClO3) based devices
• Compressed oxygen type devices

By specifying rigorous design, performance, and testing requirements, prEN 13794 ensures that oxygen escape RPDs provide reliable respiratory protection during emergency evacuations in hazardous environments.

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Key Topics

Device Classification and Types

• Devices are classified based on the oxygen supply mechanism including chemical oxygen generation and compressed oxygen storage.
• Specific classes cover different chemical compounds and delivery systems ensuring applicability across varied escape scenarios.

Design and Material Requirements

• Durable and reliable materials that ensure airtightness and resistance to mechanical stress, temperature extremes, and flammability.
• Ergonomic design considerations for ease of handling and secure fitment including facepieces, goggles, valves, and harnesses.

Performance Testing

• Laboratory tests replicate real-world conditions like temperature fluctuations (-5°C to +60°C), shock, vibration, and breathing resistance simulations.
• Practical performance tests include escape simulations to validate operational reliability and oxygen supply endurance.

Marking and Manufacturer Information

• Clear and permanent markings on devices for easy identification and critical safety information.
• Manufacturers must supply comprehensive documentation covering device specifications, usage instructions, and maintenance guidelines.

Additional Requirements

• Supplementary requirements and testing methods exist for devices intended for underground or mining environments to address unique operational challenges.
• Training devices with specific safety and performance criteria are outlined for user familiarization without exposure to actual oxygen sources.

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Applications

prEN 13794 governs the safety standards of self-contained oxygen escape respirators used in a variety of critical scenarios including:

• Industrial facilities with hazardous atmospheres requiring emergency personnel evacuation
• Underground mining operations where breathable air supply is compromised
• Confined or enclosed spaces with high risk of toxic gas exposure or oxygen deficiency
• Emergency escape planning on offshore platforms, chemical plants, and manufacturing environments

The standard ensures that rescue and escape teams have access to reliable respiratory protection enabling safe egress during sudden hazardous events. It directly supports occupational health and safety compliance related to respiratory protection equipment in Europe.

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Related Standards

prEN 13794 complements other key respiratory protective device standards and directives including:

• EN 136: Full face masks requirements and testing for respiratory protection
• EN 137: Self-contained open-circuit compressed air breathing apparatus for firefighting
• EU Directive 89/686/EEC: Personal Protective Equipment (PPE) essential safety requirements
• EN 12941/12942: Powered filtering devices and respiratory protective devices with particle filters

This interconnected framework of standards ensures comprehensive coverage of various types of respiratory protection devices tailored for different industrial, emergency, and rescue applications.

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Keywords: prEN 13794, respiratory protective devices, self-contained closed-circuit, oxygen escape device, chemical oxygen respirator, potassium superoxide, sodium chlorate, compressed oxygen, emergency escape respirator, respiratory protection standards, European standard CEN, PPE standard, escape respiratory apparatus, performance testing respiratory devices, respiratory equipment marking.

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2014
2SUHPD]DYDURYDQMHGLKDO6DPRUHãHYDOQLDYWRQRPQLGLKDOQLDSDUDW]]DSUWLP
NURJRP=DKWHYHSUHVNXãDQMHR]QDþHYDQMH
Respiratory protective devices - Self-contained closed-circuit devices for escape -
Requirements, testing and marking
Atemschutzgeräte - Isoliergeräte für Selbstrettung - Anforderungen, Prüfung,
Kennzeichnung
Appareils de protection respiratoire - Appareils de protection respiratoire isolants
autonomes à circuit fermé pour l'évacuation - Exigences, essais, marquage
Ta slovenski standard je istoveten z: prEN 13794 rev
ICS:
13.340.30 Varovalne dihalne naprave Respiratory protective
devices
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
DRAFT
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2014
ICS 13.340.30 Will supersede EN 13794:2002
English Version
Respiratory protective devices - Self-contained closed-circuit
devices for escape - Requirements, testing and marking
Appareils de protection respiratoire - Appareils de Atemschutzgeräte - Isoliergeräte für Selbstrettung -
protection respiratoire isolants autonomes à circuit fermé Anforderungen, Prüfung, Kennzeichnung
pour l'évacuation - Exigences, essais, marquage
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 79.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.

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 Ref. No. prEN 13794 rev:2014 E
worldwide for CEN national Members.

Contents
Page
Foreword .5
1 Scope .6
2 Normative references .6
3 Terms and definitions .6
4 Description .7
5 Classification .7
5.1 General .7
5.2 Types of oxygen escape devices .7
5.3 Classes of oxygen escape devices .7
6 Requirements .7
6.1 General .7
6.2 Design .8
6.3 Materials .8
6.4 Cleaning and disinfecting .9
6.5 Mass . 10
6.6 Connections (couplings) . 10
6.7 Harness . 10
6.8 Handling . 10
6.9 Leaktightness . 10
6.10 Facepiece [Respiratory Interface (RI)] . 10
6.11 Goggles . 11
6.12 Inhalation and exhalation valves . 11
6.13 Relief valve, if fitted . 12
6.13.1 General . 12
6.13.2 Opening pressure . 12
6.13.3 Tensile force . 12
6.14 Breathing bag . 12
6.15 Flexible hose(s), if fitted . 12
6.16 Mechanical strength . 12
6.17 Resistance to temperature . 13
6.17.1 Pre-conditioning . 13
6.17.2 Performance . 13
6.18 Flammability . 13
6.19 Performance . 13
6.19.1 Rated working duration . 13
6.19.2 Oxygen content . 14
6.19.3 Carbon dioxide content . 14
6.19.4 Temperature and humidity . 14
6.19.5 Breathing resistance . 14
6.20 Surface temperature . 15
6.21 Practical performance . 15
6.22 Specific requirements for escape device C type . 15
6.23 Specific requirements for escape device D type . 15
6.23.1 Protection against particulate matter . 15
6.23.2 High and medium pressure parts. 15
6.23.3 High, medium and low pressure connections . 16
6.23.4 Gas cylinders . 16
6.23.5 Gas cylinder seal . 16
6.23.6 Gas cylinder seal connection . 16
6.23.7 Pressure reducer . 16
6.23.8 Pressure indicator . 16
6.23.9 Oxygen supply . 17
6.24 Specific requirements for escape device K type . 17
6.24.1 Leaktightness . 17
6.24.2 Oxygen supply . 17
7 Testing . 17
7.1 General . 17
7.2 Nominal values and tolerances . 18
7.3 Visual inspection . 18
7.4 Leaktightness . 18
7.4.1 Leaktightness of the carrying container . 18
7.4.2 Leaktightness of the ready-for-use device . 18
7.5 Mechanical strength . 18
7.5.1 Shock . 18
7.5.2 Vibration . 18
7.6 Opening pressure of the relief valve . 19
7.7 Breathing bag . 19
7.8 Resistance to temperature . 19
7.8.1 Pre-conditioning . 19
7.8.2 Temperature tests at -5 °C and +60° C . 20
7.8.3 Low temperature practical performance test . 20
7.9 Laboratory performance tests . 20
7.9.1 General performance . 20
7.9.2 Performance at 70 l/min . 24
7.10 Surface temperature . 25
7.11 Breathing resistance . 25
7.12 Tensile force . 25
7.13 Oxygen supply . 25
7.14 Practical performance . 25
7.14.1 General . 25
7.14.2 Escape tests . 25
7.14.3 Test at rest . 26
8 Marking . 27
9 Information supplied by the manufacturer . 27
Annex A (normative) Additional requirements and methods of testing for devices devices
designed for underground use . 29
A.1 Pre-conditioning by carrying devices in underground mines . 29
A.1.1 General . 29
A.1.2 Requirements . 29
A.2 Pre-conditioning by simulating the carrying of devices in underground mines . 29
A.2.1 Exposure to vibration and shock . 29
A.2.2 Requirements . 30
Annex B (normative) Training device . 31
B.1 Definition . 31
B.2 Requirements . 31
B.2.1 Design . 31
B.2.2 Materials . 31
B.2.3 Cleaning and disinfecting . 31
B.2.4 Mass . 31
B.2.5 Handling . 31
B.2.6 Breathing resistance at 35 l/min . 31
B.2.7 Oxygen content of the inhaled air . 32
B.2.8 CO content of the inhaled air . 32
B.3 Marking . 32
B.4 Information supplied by the manufacturer . 32
Annex C (informative) Marking . 33
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 89/686/EEC on Personal Protective Equipment . 34
Bibliography . 35

Foreword
This document (prEN 13794:2014) has been prepared by Technical Committee CEN/TC 79 “Respiratory
protective devices”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 13794:2002.
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.
1 Scope
This European Standard specifies minimum requirements for self-contained closed-circuit breathing devices,
chemical oxygen (KO , NaClO ) type and compressed oxygen type, for escape (short: oxygen escape device).
2 3
This European Standard does not apply to devices for work and rescue and to diving apparatus.
Laboratory and practical performance tests are included for the assessment of compliance with the
requirements.
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 132, Respiratory protective devices - Definitions of terms and pictograms
EN 134, Respiratory protective devices - Nomenclature of components
EN 136:1998, Respiratory protective devices - Full face masks - Requirements, testing, marking
EN 166:1995, Personal eye protection – Specifications
EN 168:1995, Personal eye protection - Non-optical test methods
EN 13274-1, Respiratory protective devices - Methods of test - Part 1: Determination of inward leakage and
total inward leakage
EN 13274-2:2001, Respiratory protective devices - Methods of test - Part 2: Practical performance tests
EN 13274-3:2002, Respiratory protective devices - Methods of test - Part 3: Determination of breathing
resistance
EN 13274-4:2001, Respiratory protective devices - Methods of test - Part 4: Flame tests
EN 13274-5, Respiratory protective devices - Methods of test - Part 5: Climatic conditions
3 Terms and definitions
For the purposes of this document, the following terms and definitions given in EN 132, EN 134 and the
following apply.
3.1
quick start system
mechanism which activates the oxygen generation/flow whilst opening the storage container or by pulling the
facepiece
3.2
Respiratory Interface
(RI)
part of a respiratory protective device that forms the protective barrier between the wearer’s respiratory tract
and the ambient atmosphere
[SOURCE: ISO 16972, 3.162]
3.3
ready for use device
device where the container is opened
4 Description
An oxygen escape device is designed and constructed so that exhaled breathing gas is ducted from the
facepiece into a circuit which contains a cartridge and a breathing bag where it is available for re-breathing.
device -
The cartridge contains chemicals which absorb exhaled carbon dioxide and - in case of a KO
humidity and generates also oxygen.
In case of a NaClO device, a chemical oxygen source (NaClO candle) generates the oxygen to be needed.
3 3
In case of a compressed oxygen device, oxygen is fed into the circuit at a suitable point by means of a
constant flow device or by a lung governed demand valve or by a suitable combination of both.
The breathing gas flow may be of the pendulum or loop type and excess gas is ejected via a relief valve.
5 Classification
5.1 General
Oxygen escape devices are classified according to their oxygen source and rated working duration in types
and classes.
5.2 Types of oxygen escape devices
 Type C NaClO device;
 Type D Compressed oxygen device;
 Type K KO device.
5.3 Classes of oxygen escape devices
Oxygen escape devices are classified according to the rated working duration (see 6.19.1) which is defined by
performing a breathing machine test in accordance with 7.9.1 after the device is being exposed to shock in
accordance with 7.5.1 and vibration in accordance with 7.5.2.
Rated working duration will be defined in increments of 5 min up to and including duration of 30 min and
thereafter in steps of 10 min.
6 Requirements
6.1 General
All test specimens shall meet all requirements.
Where it is required in a specific clause the manufacturer shall declare that a failure modes and effect analysis
(FMEA) has been conducted.
The FMEA shall at least cover the following areas
 Materials (6.3)
 Cleaning and disinfection (6.4)
The manufacturer shall maintain a copy of the FMEA in their records for a time period of at least 10 years or
for 5 years after the device ceases production whichever is the longest.
NOTE Further information is given in EN 60812 [1].
6.2 Design
The device shall be of reliable construction and as compact as possible.
The device shall be designed so as not to interfere with work activities when being carried. It shall be used in
accordance with the information supplied by the manufacturer.
The device shall be so designed that there are no protruding parts or sharp edges likely to be caught on
projections in narrow passages.
The surface of any part of the device likely to be in contact with the wearer shall be free from sharp edges and
burrs.
The device shall be so designed and constructed as to prevent ingress of external atmosphere within the
limits specified in this European Standard.
The device shall be so designed that the outside of the container can be easily cleaned.
The device shall be so designed as to prevent the chemical from entering the wearer's respiratory tract and
that saliva or condensate shall not interfere with the function of the device or cause any harmful effect to the
wearer.
Check in accordance with 7.3 and test in accordance with 7.14.
It shall not be possible to initiate a quick start system inadvertently, if fitted.
It shall not be possible to don the device without initiating the quick start system, if fitted.
Devices for special use, i.e. in mining, shall meet the requirements specified in Annex A when tested in
accordance with Annex A.
Devices for training purposes only shall meet the requirements specified in Annex C when tested in
accordance with Annex C.
Training may also be carried out with the device specified in this standard.
Check in accordance with 7.3.
6.3 Materials
The carrying container and the locking device, where present, shall be adequately protected against
corrosion. The materials used shall be able to withstand temperatures and mechanical stress to be expected
whilst being carried on the person as well as being stored on machines and vehicles.
Check in accordance with 7.3, test in accordance with 7.8.1 and 7.14.
Exposed parts, i.e. those which can be subjected to impact during use of the device, shall not be made of
aluminium, magnesium, titanium or alloys containing such proportions of these metals as will, on impact, give
rise to frictional sparks capable of igniting flammable gas mixtures.
Check in accordance with 7.3.
Any container or carrying container using such materials shall be adequately protected.
If national regulations allow the use of such containers or carrying containers then when tested for impact and
scraping no metal shall be exposed.
Non-metallic carrying containers shall be antistatic.
If the device is required to be antistatic during escape, materials used shall be antistatic.
Exposed parts shall have a surface resistance of lower than 10 Ω measured in accordance with
IEC 60079-32-2, 4.2. Exposed parts that do not meet this criterion may also be used if the maximum
transferred charge tested in accordance with IEC 60079-32-2, 4.10 does not exceed the maximum acceptable
values for the appropriate explosion group given in IEC 60079-32-1, Table 4 .
A general decision process for evaluating and testing plastic materials is given in Figure 1 (compare cited
documents).
Figure 1 — General decision process
Materials which come into direct contact with the wearer's skin shall not be known to be likely to cause
irritation or any other adverse effect to health.
Check in accordance with 7.3 and test in accordance with 7.14.
Care shall be taken in selecting materials that may come into contact with oxygen to ensure that no oxygen
ignition take place.
Devices using oxygen generating chemicals shall be known not to ignite or combust due to the elevated
temperatures of the device (caused by the exothermic chemical reaction) as a result of foreseeable use
addressed by a FMEA.
Check in accordance with 7.3.
6.4 Cleaning and disinfecting
All parts requiring cleaning and disinfecting shall be able to withstand cleaning and disinfecting agents and
procedures recommended by the manufacturer.
This shall be addressed in the FMEA.
Check in accordance with 7.3.
6.5 Mass
The mass of the complete device including carrying container shall not exceed 5 kg when designed to be
carried for at least 8 h.
The mass of the device excluding any container when stored in ready-for-use condition shall not exceed
7,5 kg.
Check in accordance with 7.3.
6.6 Connections (couplings)
The design and construction of the device shall permit its components to be easily disassembled for cleaning,
inspecting and testing. If demountable connections are used to achieve this, they shall be easily connected
and secured, preferably by hand.
Any means for sealing used shall be retained in position when the connection(s) is (are) disconnected during
normal maintenance.
Check in accordance with 7.3 and test in accordance with 7.14.
6.7 Harness
The device in use shall have a harness, or other means of support, so that the wearers' hands are left free,
when the device is in use.
Any harness shall be designed to allow quick, easy and correct donning of the device without assistance.
Check in accordance with 7.3 and test in accordance with 7.14.
6.8 Handling
The device shall be capable of being donned and simply put into operation without undue exertion under
difficult conditions, e. g. in the dark and in restricted spaces.
If the device container is fitted with a special fastening, the design shall be such that it cannot be opened
inadvertently.
If the device has been opened this shall be obvious by visual inspection.
Check in accordance with 7.3 and test in accordance with 7.14.
6.9 Leaktightness
The ready-for-use device shall be leak tight so that the pressure change does not exceed 0,3 mbar within 1
min.
Testing shall be performed in accordance with 7.4.2.
6.10 Facepiece [Respiratory Interface (RI)]
The facepiece shall be either a mouthpiece assembly or a full face mask and shall be attached securely to the
device.
Type D-device relying only upon a lung governed demand valve shall be fitted with a full face mask.
The mouthpiece assembly shall have two teeth bites and a permanently attached nose clip.
The mouthpiece assembly shall ensure reliable sealing and shall not be able to block inadvertently the
breathing circuit when the device is in operation.
The mouthpiece assembly shall be fitted with an adjustable or self-adjusting head harness if it is likely that an
undue load is exerted on the wearer's mouth.
The nose clip shall provide an airtight seal of the nose. It shall be flexible attached to the mouthpiece
assembly so that, when fitting the mouthpiece, the wearer's attention is automatically drawn to the nose clip.
Check in accordance with 7.3 and test in accordance with 7.14.
If a full face mask is used as a facepiece the following requirements shall be met:
 the full face mask shall be provided with an adjustable or self-adjusting head harness;
 the requirements of EN 136:1998, 7.11.1 and 7.11.3.1 shall be met.
The lens of the full face mask shall meet the requirements for eyepieces and visors of EN 136, except the
requirement for the field of vision.
Check in accordance with 7.3 and test in accordance with 7.14 and the relevant clauses of EN 136.
The face seal leakage of the full face mask shall be tested separately and shall meet the requirements of
EN 136, 7.20, when tested in accordance with EN 13274-1.
6.11 Goggles
If the device is used with goggles, then the lenses of the goggles shall be protected against fogging. The head
straps of the goggles shall be flexible and easy to adjust or self-adjusting.
The goggles shall be attached to the device to prevent loss when opening the carrying container. The goggles
shall not interfere with the donning of the device.
Check in accordance with 7.3 and test in accordance with 7.14.
After the test for mechanical strength of the eyepiece(s) in accordance with EN 136, 8.11, the goggles shall
not be damaged in any way that may make it ineffective or cause injury to the wearer.
Check in accordance with 7.3 and test in accordance with 7.14.
The leaktightness of the goggles shall meet the requirements of EN 166:1995, 7.2.5, when tested in
accordance with EN 168:1995, Clause 13.
6.12 Inhalation and exhalation valves
The valves shall function correctly in all orientations.
Valve assemblies shall be such that they can be readily maintained and cannot be incorrectly replaced.
Inhalation and exhalation valve assemblies, sub-assemblies and piece parts that are identical by the
manufacturers design, are acceptable.
Inhalation and exhalation valves differently designed are acceptable, if an unambiguous description is given in
the information supplied by the manufacturer. The description in the information supplied by the manufacturer
should be supported by illustrations (photographs, drawings) on how to assemble the unit correctly.
To enable correct assembly, the parts shall be unambiguously described or marked.
Means to check the correct assembly shall be described in the manufacturers information.
Check in accordance with 7.3 and test in accordance with 7.14.
6.13 Relief valve, if fitted
6.13.1 General
The relief valve shall be protected against or be resistant to dirt and mechanical damage.
Check in accordance with 7.3.
6.13.2 Opening pressure
A relief valve shall open properly irrespective of the orientation of the device.
The relief valve shall open at a positive pressure of not less than 1 mbar.
If the relief valve is positioned in the breathing circuit before the regeneration cartridge, the pressure drop
between the relief valve and the entry of the breathing bag shall at no time, during the rated working duration
of the set, be greater than the minimum opening pressure of the relief valve.
Testing shall be performed in accordance with 7.6.
6.13.3 Tensile force
The connection between the relief valve housing and the attachment part shall withstand an axial tensile force
of 50 N applied for (10 ± 1) s.
Testing shall be performed in accordance with 7.12.
6.14 Breathing bag
The breathing bag, or additional protective measures provided, shall withstand the foreseeable conditions of
use.
The volume of the breathing bag shall be at least 6 l.
Testing shall be performed in accordance with 7.7.
6.15 Flexible hose(s), if fitted
The breathing hose(s) shall be flexible and non-kinking. The breathing hose(s) shall permit free head
movement and shall not restrict or close-off the gas supply under chin or arm pressure during practical
performance tests.
Testing shall be performed in accordance with 7.14.
The connections shall withstand an axial tensile force of 50 N applied for (10 ±1) s.
Testing shall be performed in accordance with 7.12.
6.16 Mechanical strength
For each of the requirements specified in 6.19.1, the device shall be subjected to shock and vibration test as
specified in 7.5.1 and 7.5.2.
After the exposure to 7.5.1 and 7.5.2 the carrying container shall be leaktight.
Testing shall be performed in accordance with 7.4.1.
After the carrying container has passed the test in accordance with 7.4.1, the device has to provide protection
and shall meet the performance requirements in 6.19.1.
Testing shall be performed in accordance with 7.9.
For devices designed for underground use additional requirements and test methods specified in A.1 or A.2,
as an alternative, shall be fulfilled.
6.17 Resistance to temperature
6.17.1 Pre-conditioning
Six devices shall be pre-conditioned.
After pre-conditioning in accordance with 7.8.1 and being allowed to return to room temperature
 the carrying container shall have no deficiencies that impair its functionality,
 the materials used shall not show substantial deteriorations (severe deformations, cracks, etc.),
Check in accordance with 7.3.
When tested in accordance with 7.5.1 the device shall be leaktight and shall fulfil the requirement of 6.19.
One device shall be tested in accordance with 7.4.2.
6.17.2 Performance
The device shall function correctly within a temperature range of -5 °C to +60 °C and shall meet the
requirements for oxygen content, carbon dioxide content and breathing resistance.
Testing shall be performed in accordance with 7.8.2, 7.8.3 and 7.9.1.
Devices intended for use outside this temperature range shall be tested and marked accordingly.
6.18 Flammability
One ready-for-use device shall be examined and those parts deemed to be of an exposed nature during
normal use shall be tested in accordance with EN 13274-4:2001, method 4.
Components shall be considered to be flame resistant if they do not burn or if they are self-extinguishing
within 5 s after removal from the test flame.
After the test the device shall still be leaktight.
Testing shall be performed in accordance with 7.4.2 and EN 13274-4, method 4.
6.19 Performance
6.19.1 Rated working duration
The device shall meet the duration defined for its class when tested at 35 l/min (see Clause 5). The duration
for type D, lung governed demand compressed oxygen device and for type K, chemical oxygen (KO ) device
shall be at least three times longer when tested at 10 l/min.
The device shall meet the elevated flow of 70 l/min.
Testing shall be performed in accordance with 7.9.1 and 7.9.2.
6.19.2 Oxygen content
The oxygen content of the inhaled gas shall not be below a volume fraction of 21 %. A deviation to a level of
not less than a volume fraction of 17 % for a period of not more than 2 min at the beginning of the test is
permissible.
Testing shall be performed in accordance with 7.9.1.
6.19.3 Carbon dioxide content
Throughout the rated working duration of the device the carbon dioxide content of the inhalation air shall not
exceed an average value of a volume fraction of 1,5 % and shall at no time exceed a volume fraction of 3,0 %.
For devices with a rated working duration of up to and including 15 min, the carbon dioxide content shall not
exceed a volume fraction of 3,0 %.
At the beginning of the test with the breathing machine the carbon dioxide content of inhalation gas may
exceed the average for not more than 2 min but this average value shall not exceed a volume fraction of
3,0 %.
After the rated working duration and up to a breathing resistance for inhalation of 35 mbar the CO content
shall not exceed a volume fraction of 3,0 %.
Testing shall be performed in accordance with 7.9.1.
6.19.4 Temperature and humidity
When tested at a minute volume of 35 l/min the temperature of the inhalation gas shall not exceed +60°C
during the rated working duration and a relative humidity of up to 30 %. For values greater than 30 % relative
humidity the temperature shall not exceed +50°C.
Testing shall be performed in accordance with 7.8.2, 7.8.3, 7.9.1 and 7.14.
6.19.5 Breathing resistance
6.19.5.1 Breathing resistance at 35 l/min
At any point in the rated working duration, a device with a rated working duration of up to and including
30 min, the sum of the inhalation and exhalation resistances shall not exceed 16 mbar and the maximum
individual breathing resistance for inhalation or exhalation shall not exceed 10 mbar when tested in the normal
wearing position.
At any point in the rated working duration, a device with a rated working duration of more than 30 min, the
sum of the inhalation and exhalation resistances shall not exceed 13 mbar and the maximum individual
breathing resistance for inhalation or exhalation shall not exceed 7,5 mbar when tested in the normal wearing
position.
Testing shall be performed in accordance with 7.11 and EN 13274-3:2002, method 2.
6.19.5.2 Breathing resistance at 70 l/min
For devices of all rated working durations the breathing resistance for inhalation as well as for exhalation shall
not exceed 20 mbar when tested in the normal wearing position.
Testing shall be performed in accordance with 7.11 and EN 13274-3, method 2.
6.20 Surface temperature
During laboratory tests in accordance with 7.9 the maximum surface temperature of any part of the device
shall be determined. This value shall be stated in the information supplied by the manufacturer.
Testing shall be performed in accordance with 7.10.
During practical performance tests the surface temperature of the device shall be acceptable to the wearer
when dressed in a simple cotton vest.
Testing shall be performed in accordance with 7.14.
6.21 Practical performance
Practical performance tests shall only be performed following satisfactory results during the laboratory tests.
In addition to the machine tests described, the device shall also undergo practical performance tests under
realistic conditions. These general tests serve the purpose to check the device for imperfections that cannot
be determined by the tests described elsewhere in this European Standard.
At the time when the device is rejected by the wearer or when the inhalation breathing resistance reaches
35 mbar, the level of oxygen in the inhalation gas shall have at least a volume fraction of 17 % and the level of
CO shall not exceed a volume fraction of 5,0 %.
If practical performance tests show the device has imperfections related to wearers' acceptance, the test
house shall describe the tests which revealed these imperfections.
Testing shall be performed in accordance with 7.14 and EN 13274-2.
6.22 Specific requirements for escape device C type
The device shall deliver an adequate flow of oxygen of not less than 4,0 l/min within the rated working
duration. The chlorate candle shall incorporate a pressure safety device (e. g. burst disc).
Testing shall be performed in accordance with 7.13.
6.23 Specific requirements for escape device D type
6.23.1 Protection against particulate matter
The parts of the device supplying compressed oxygen shall be reliable protected against the ingress of
particulate matter that can be contained in the compressed oxygen. This can be achieved by mounting e.g. a
sinter filter.
Check in accordance with 7.3.
6.23.2 High and medium pressure parts
Metallic high pressure tubes, valves and connections shall be capable of withstanding a test pressure of 50 %
above the maximum working pressure of the gas cylinders without damage.
Non-metallic high pressure parts shall be capable of withstanding a test pressure of twice the maximum
working pressure of the gas cylinders without damage.
All medium pressure tubes downstream of the pressure reducer shall be capable of withstanding twice their
maximum attainable working pressure without damage.
Check in accordance with 7.3.
6.23.3 High
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