prEN 13794 rev

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

This document specifies minimum requirements for self-contained closed-circuit breathing RPDs for escape (short: oxygen escape RPD)
a) chemical oxygen type
    ― Potassium superoxide (KO2),
    ― Sodium chlorate (NaClO3) and
b) compressed oxygen type.
This document 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, Kennzeichnung

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

Le présent document 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) relevant des types suivants :
a) à oxygène chimique
⎯ à superoxyde de potassium (KO2) ;
⎯ à chlorure de sodium (NaClO3) ; et
b) à oxygène comprimé.
Le présent document ne s'applique ni aux APR destinés au travail ou au sauvetage ni aux appareils de plongée.
Le présent document contient des essais en laboratoire et des essais pratiques de performance visant à s'assurer de la conformité aux exigences.

Oprema za varovanje dihal - Samoreševalni avtonomni dihalni aparat z zaprtim krogom - Zahteve, preskušanje in 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: 4060 - Closure of enquiry - Enquiry
• Due Date: 19-Jul-2021
• Completion Date: 08-Apr-2021
• Directive: 2016/425 - Regulation (EU) 2016/425 of the European Parliament and of the Council of 9 March 2016 on personal protective equipment and repealing Council Directive 89/686/EEC
• Directive: 2016/797/EU - Directive (EU) 2016/797 of the European Parliament and of the Council of 11 May 2016 on the interoperability of the rail system within the European Union (Text with EEA relevance)
• Mandate: M/031 - Standardization mandate to CEN/CENELEC concerning standards for Personal Protective Equipment
• Mandate: M/571 - COMMISSION IMPLEMENTING DECISION of 19.11.2020 on a standardisation request to the European Committee for Standardization and the European Committee for Electrotechnical Standardization as regards personal protective equipment in support of Regulation (EU) 2016/425 of the European Parliament and of the Council
• Mandate: M/PPE - PPE
• Mandate: M/XXX - Artificial Intelligence
• Ref Project: oSIST prEN 13794:2021 - Respiratory protective devices - Self-contained closed-circuit breathing apparatus for escape - Requirements, testing and marking

Relations

• Revises: EN 13794:2002 - Respiratory protective devices - Self-contained closed-circuit breathing apparatus for escape - Requirements, testing, marking
• Effective Date: 18-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN 13794:2021
01-marec-2021
Oprema za varovanje dihal - Samoreševalni avtonomni dihalni aparat z zaprtim
krogom - Zahteve, preskušanje in označevanje

Respiratory protective devices - Self-contained closed-circuit breathing apparatus for

escape - Requirements, testing and marking
Atemschutzgeräte ¿ Isoliergeräte für Selbstrettung ¿ Anforderungen, Prüfung,
Kennzeichnung

Appareils de protection respiratoire - Appareils isolants autonomes à circuit fermé pour

l'évacuation - Exigences, essais, marquage
Ta slovenski standard je istoveten z: prEN 13794
ICS:
13.340.30 Varovalne dihalne naprave Respiratory protective
devices
oSIST prEN 13794:2021 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 13794:2021
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oSIST prEN 13794:2021
DRAFT
EUROPEAN STANDARD
prEN 13794
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2021
ICS 13.340.30 Will supersede EN 13794:2002
English Version
Respiratory protective devices - Self-contained closed-
circuit breathing apparatus for escape - Requirements,
testing and marking

Appareils de protection respiratoire - Appareils Atemschutzgeräte ¿ Isoliergeräte für Selbstrettung ¿

isolants autonomes à circuit fermé pour l'évacuation - Anforderungen, Prüfung, Kennzeichnung

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, 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: Rue de la Science 23, B-1040 Brussels

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 13794:2021 E

worldwide for CEN national Members.
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oSIST prEN 13794:2021
prEN 13794:2021 (E)
Contents Page

European foreword ....................................................................................................................................................... 4

1 Scope .................................................................................................................................................................... 5

2 Normative references .................................................................................................................................... 5

3 Terms and definitions ................................................................................................................................... 6

4 Description ........................................................................................................................................................ 6

5 Classification ..................................................................................................................................................... 6

5.1 General ................................................................................................................................................................ 6

5.2 Types of oxygen escape RPD ....................................................................................................................... 6

5.3 Classes of oxygen escape RPD ..................................................................................................................... 6

6 Requirements ................................................................................................................................................... 7

6.1 General ................................................................................................................................................................ 7

6.2 Nominal values and tolerances .................................................................................................................. 7

6.3 Design .................................................................................................................................................................. 7

6.4 Materials ............................................................................................................................................................. 8

6.4.1 Corrosion ............................................................................................................................................................ 8

6.4.2 RPD used in potentially explosive atmospheres ................................................................................. 8

6.4.3 Skin compatibility ........................................................................................................................................... 9

6.4.4 Oxygen compatibility .................................................................................................................................. 10

6.5 Mass ................................................................................................................................................................... 10

6.6 Connections .................................................................................................................................................... 10

6.7 Harness ............................................................................................................................................................ 10

6.8 Handling .......................................................................................................................................................... 10

6.9 Leaktightness ................................................................................................................................................. 10

6.10 Respiratory Interface (RI) ......................................................................................................................... 11

6.11 Goggles, if fitted ............................................................................................................................................ 11

6.12 Inhalation and exhalation valves ........................................................................................................... 12

6.13 Relief valve, if fitted ..................................................................................................................................... 12

6.13.1 General ............................................................................................................................................................. 12

6.13.2 Relief valve performance .......................................................................................................................... 12

6.13.3 Tensile force ................................................................................................................................................... 12

6.14 Flexible breathing hose(s), if fitted ....................................................................................................... 12

6.15 Preconditioning by mechanical stress ................................................................................................. 12

6.16 Preconditioning by temperature and humidity ................................................................................ 13

6.17 Flammability .................................................................................................................................................. 13

6.18 Laboratory performance ........................................................................................................................... 13

6.18.1 General ............................................................................................................................................................. 13

6.18.2 Rated working duration ............................................................................................................................ 13

6.18.3 Laboratory performance over the range of operating temperatures ....................................... 14

6.18.4 Oxygen content ............................................................................................................................................. 15

6.18.5 Carbon dioxide content .............................................................................................................................. 15

6.18.6 Temperature and humidity of inhaled breathable gas .................................................................. 16

6.18.7 Breathing resistance ................................................................................................................................... 16

6.19 Surface temperature ................................................................................................................................... 17

6.20 Practical performance ................................................................................................................................ 17

6.21 Specific requirements for escape RPD C type .................................................................................... 17

6.22 Specific requirements for escape RPD D type .................................................................................... 18

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oSIST prEN 13794:2021
prEN 13794:2021 (E)

6.22.1 Protection against particulate matter ................................................................................................... 18

6.22.2 High and medium pressure parts ........................................................................................................... 18

6.22.3 High, medium and low pressure connections .................................................................................... 18

6.22.4 Gas cylinders .................................................................................................................................................. 18

6.22.5 Gas cylinder seal ........................................................................................................................................... 18

6.22.6 Gas cylinder seal connection .................................................................................................................... 18

6.22.7 Pressure reducer .......................................................................................................................................... 19

6.22.8 Pressure indicator ........................................................................................................................................ 19

6.22.9 Oxygen supply ................................................................................................................................................ 19

6.23 Oxygen supply for escape RPD K type ................................................................................................... 20

6.24 Leaktightness for escape RPD K type and C type .............................................................................. 20

7 Testing .............................................................................................................................................................. 20

7.1 General ............................................................................................................................................................. 20

7.2 Inspection ........................................................................................................................................................ 22

7.3 Leaktightness ................................................................................................................................................. 23

7.3.1 Leaktightness of the carrying container .............................................................................................. 23

7.3.2 Leaktightness of the RPD in ready for use configuration ............................................................... 23

7.4 Mechanical strength .................................................................................................................................... 23

7.4.1 Shock ................................................................................................................................................................. 23

7.4.2 Vibration .......................................................................................................................................................... 23

7.5 Resistance to temperature ........................................................................................................................ 24

7.5.1 Pre-conditioning ........................................................................................................................................... 24

7.5.2 Low temperature practical performance test .................................................................................... 24

7.6 Laboratory performance tests ................................................................................................................. 25

7.7 Surface temperature .................................................................................................................................... 28

7.8 Breathing resistance .................................................................................................................................... 29

7.9 Tensile force ................................................................................................................................................... 29

7.10 Oxygen supply ................................................................................................................................................ 29

7.11 Practical performance ................................................................................................................................ 29

7.11.1 General ............................................................................................................................................................. 29

7.11.2 Escape tests ..................................................................................................................................................... 29

7.11.3 Testing of oxygen content, carbon dioxide content and temperature of inhaled gas .......... 30

7.12 Flow measurement....................................................................................................................................... 30

7.13 Pull Force ......................................................................................................................................................... 30

8 Marking ............................................................................................................................................................ 31

9 Information supplied by the manufacturer ........................................................................................ 31

Annex A (normative) Additional requirements and methods of testing for RPD designed for

underground use .......................................................................................................................................... 34

Annex B (informative) Guideline for training RPD ........................................................................................ 35

Annex C (informative) Calculation of the volume flow (V) using the mass flow (m) ......................... 37

Annex ZA (informative) Relationship between this European Standard and the essential

health and safety requirements of Regulation 2016/425/EU [2016 OJ L81] aimed to

be covered ....................................................................................................................................................... 38

Bibliography ................................................................................................................................................................. 40

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oSIST prEN 13794:2021
prEN 13794:2021 (E)
European foreword

This document (prEN 13794:2020) 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 standardization request 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, see informative Annex ZA, which is an integral part of this

document.
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oSIST prEN 13794:2021
prEN 13794:2021 (E)
1 Scope

This document specifies minimum requirements for self-contained closed-circuit breathing RPD for

escape (short: oxygen escape RPD)
a) chemical oxygen type
— potassium superoxide (KO ),
— sodium chlorate (NaClO ) and
b) compressed oxygen type.
This document 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.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

EN 134:1998, Respiratory protective devices - Nomenclature of components

EN 136:1998, Respiratory protective devices - Full face masks - Requirements, testing, marking

EN 13274-1:2001, Respiratory protective devices - Methods of test - Part 1: Determination of inward

leakage and total inward leakage

EN 13274-2:2019, 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 13274-4:2020, Respiratory protective devices - Methods of test - Part 4: Flame test

EN 13274-5:2001, Respiratory protective devices - Methods of test - Part 5: Climatic conditions

EN ISO 16321-1:-, Eye and face protection for occupational use - Part 1: General requirements (ISO/FDIS

16321-1:2020)

EN ISO 16972:2020, Respiratory protective devices - Vocabulary and graphical symbols(ISO 16972:2020)

EN ISO 18526-3:2020, Eye and face protection - Test methods - Part 3: Physical and mechanical

properties (ISO 18526-3:2020)

ISO 80079-36:2016, Explosive atmospheres — Part 36: Non-electrical equipment for explosive

atmospheres — Basic method and requirements
Under preparation. Stage at time of publication: FprEN ISO 16321-1:2020
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oSIST prEN 13794:2021
prEN 13794:2021 (E)
3 Terms and definitions

For the purposes of this document, the following terms and definitions given in EN ISO 16972:2020,

EN 134:1998 and the following apply.
3.1
quick start system

mechanism which activates the generation or flow of breathable gas whilst opening the container or by

pulling the facepiece
3.2
ready for use configuration

complete respiratory protective device, which may not be fully assembled, but is in a state which allows

the immediate start of the donning procedure as described by the manufacturer
4 Description

An oxygen escape RPD 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. The cartridge contains chemicals which absorb exhaled carbon dioxide and - in case of a KO

RPD - humidity and generates also oxygen.

In case of a NaClO RPD, a chemical oxygen source (NaClO candle) generates the oxygen to be needed.

3 3

In case of a compressed oxygen RPD, 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 to the surrounded

atmosphere via a relief valve.
5 Classification
5.1 General

Oxygen escape RPD are classified according to their oxygen source and rated working duration in types

and classes.

RPD intended to be carried on a person, machine or vehicle shall be classified as “M”, otherwise it shall

be classified as “R”.
5.2 Types of oxygen escape RPD
— Type C NaClO RPD;
— Type D Compressed oxygen RPD;
— Type K KO RPD.
5.3 Classes of oxygen escape RPD

Oxygen escape RPD classes are defined by rated working duration with increments of 5 min up to and

including duration of 30 min and thereafter in steps of 10 min.
The minimum class has a rated working duration of 5 min and is class 5.
The classes are assessed by the requirements of 6.18.2.1.
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oSIST prEN 13794:2021
prEN 13794:2021 (E)
6 Requirements
6.1 General

All test samples specified in the related test clauses shall meet the relevant requirements.

Where it is required in a specific clause, the manufacturer shall declare that a risk assessment e.g. a

Failure Modes and Effect Analysis (FMEA) concerning these specific requirements has been conducted.

NOTE Further information is given in EN 60812 [1].
6.2 Nominal values and tolerances

Unless otherwise specified, the values stated in this document are expressed as nominal values. Except

for temperature limits, values which are not stated as maxima or minima shall be subject to a tolerance

of ± 5 %. Unless otherwise specified, the ambient conditions for testing shall be between 16°C and 32°C

and (50 ± 30) % relative humidity. Any temperature limits specified shall be subject to an accuracy

of ± 1°C.
6.3 Design

The RPD 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 surface of any part of the RPD likely to be in contact with the wearer shall be free from sharp edges,

burrs and no protruding parts, that can be caught on projections in narrow passages, or by moving

parts.
Check in accordance with 7.2 and test in accordance with 7.11

The RPD shall be so designed and constructed as to prevent ingress of external atmosphere within the

limits specified in this document.
Testing shall be performed in accordance with 7.3.

The RPD shall be so designed as to prevent that saliva or condensate to interfere with the function of

the RPD or cause any harmful effect to the wearer.
Check in accordance with 7.2 and test in accordance with 7.11.

The RPD shall be so designed to prevent the chemical used in the RPD entering the wearer's respiratory

tract.
No migration to the RI of any powdered chemical shall be possible.

After pre-conditioning in accordance with 7.4, check in accordance with 7.3 using a cotton pad with

chemical reagent which reacts with KO powder e.g. phenolphthalein.

It shall not be possible to initiate a quick start system inadvertently, if fitted.

It shall not be possible to don the RPD without initiating the quick start system, if fitted.

For RPD designed for underground use, the additional requirements specified in Annex A shall be

fulfilled.
Test in accordance with Annex A.

RPD shall be designed in such a way to minimize the risk to be caught up. Special mechanism or

carrying methods can be used to minimize the risk.

The manufacturer shall supply a declaration that this was addressed by a risk assessment, e.g. a FMEA.

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oSIST prEN 13794:2021
prEN 13794:2021 (E)

If a training RPD is available, it shall be clearly distinguishable from the working RPD and shall be

marked as such and explained in the information supplied by the manufacturer.

If a training RPD is available, it shall follow the general guidelines in Annex B.

WARNING —Training RPD according to Annex B are not Personal Protective Equipment and therefore,

they shall never be used in hazardous conditions.
Check in accordance with 7.2.
6.4 Materials
6.4.1 Corrosion

The carrying container and the locking system, where present, shall be adequately protected against

corrosion.

The manufacturer shall supply a declaration that this was addressed by a risk assessment, e.g. a FMEA.

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 7.2 and test in accordance with 7.4, 7.5.1 and 7.11.
6.4.2 RPD used in potentially explosive atmospheres
6.4.2.1 General

If the RPD is intended to be used in potentially explosive atmospheres the RPD shall be marked

accordingly.
6.4.2.2 Exposed components

RPD intended to be used in potentially explosive atmospheres shall not have exposed unprotected

metal components manufactured from Aluminium, Magnesium, Titanium, Zirconium or their alloys

containing such proportions of these metals which, on impact with rusted iron or steel, are likely to

produce sparks capable of igniting flammable gas/air mixtures.

The manufacturer shall supply a declaration that this was addressed by a risk assessment, e.g. a FMEA.

Check in accordance with 7.2.
6.4.2.3 Antistatic properties

RPD and exposed components in the ready for use packaging and during the donning of the RPD and in

the donned configuration shall be tested in accordance with ISO 80079-36:2016. Testing by charging

with a DC high voltage power supply (ISO 80079-36:2016, D.4.2.3,) can be excluded, as long as highly

efficient charge generating mechanisms (fast separation processes, e.g. films moving over rollers, drive

belts, loading arm operation and bulk hydrocarbon transfer) are unlikely to be present. A warning shall

be given in the information supplied by the manufacturer.

Exposed components are those that can be touched, during use, by the exposed surface identification

probe given in Figure 1.
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oSIST prEN 13794:2021
prEN 13794:2021 (E)
Dimensions in millimetres
Key
1 surface, corrugated at the discretion of the manufacturer
Figure 1 — Exposed surface identification probe
6.4.2.4 Use of RPD in potentially explosive atmospheres

If in the information supplied by the manufacturer the RPD is claimed that it can be used in potentially

explosive atmospheres it shall comply with the IEC Ex Certified Equipment Program.

6.4.3 Skin compatibility

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.

The manufacturer shall supply a declaration that this was addressed by a risk assessment, e.g. a FMEA.

Check in accordance with 7.2.
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oSIST prEN 13794:2021
prEN 13794:2021 (E)
6.4.4 Oxygen compatibility

Materials that can come into contact with oxygen shall not cause an oxygen ignition.

The manufacturer shall supply a declaration that this was addressed by a risk assessment, e.g. a FMEA.

RPD using oxygen generating chemicals shall be known not to ignite or combust due to the elevated

temperatures of the RPD (caused by the exothermic chemical reaction) as a result of intended use.

The manufacturer shall supply a declaration that this was addressed by a risk assessment, e.g. a FMEA..

Check in accordance with 7.2.
6.5 Mass

The mass of the RPD in the donned configuration during escape shall not exceed 5 kg.

The mass of the complete RPD including carrying container shall not exceed 5 kg when designed to be

carried.
Check in accordance with 7.2.
6.6 Connections

If the manufacturer claims that parts of the RPD needs to be maintained during lifetime, then the design

and construction of the RPD 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

connect
...