SIST EN ISO 5923:2013
(Main)Equipment for fire protection and fire fighting - Fire extinguishing media - Carbon dioxide (ISO 5923:2012)
Equipment for fire protection and fire fighting - Fire extinguishing media - Carbon dioxide (ISO 5923:2012)
This International Standard specifies requirements for carbon dioxide for use as a fire extinguishing medium.
Einführendes Element - Haupt-Element - Ergänzendes Element (ISO 5923:2012)
Diese Internationale Norm legt Anforderungen an Kohlenstoffdioxid zur Verwendung als Feuerlöschmittel fest.
Équipement de protection et de lutte contre l'incendie - Agents extincteurs - Dioxyde de carbone (ISO 5923:2012)
L'ISO 5923:2012 spécifie les exigences relatives au dioxyde de carbone lorsqu'il est destiné à être utilisé comme agent extincteur.
Oprema za požarno zaščito in gašenje - Gasila - Ogljikov dioksid (ISO 5923:2012)
Ta mednarodni standard določa zahteve za uporabo ogljikovega dioksida kot sredstva za gašenje požara.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 5923:2013
01-januar-2013
1DGRPHãþD
SIST EN 25923:1997
2SUHPD]DSRåDUQR]DãþLWRLQJDãHQMH*DVLOD2JOMLNRYGLRNVLG ,62
Equipment for fire protection and fire fighting - Fire extinguishing media - Carbon dioxide
(ISO 5923:2012)
Einführendes Element - Haupt-Element - Ergänzendes Element (ISO 5923:2012)
Équipement de protection et de lutte contre l'incendie - Agents extincteurs - Dioxyde de
carbone (ISO 5923:2012)
Ta slovenski standard je istoveten z: EN ISO 5923:2012
ICS:
13.220.10 Gašenje požara Fire-fighting
13.220.20 3RåDUQD]DãþLWD Fire protection
SIST EN ISO 5923:2013 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST EN ISO 5923:2013
---------------------- Page: 2 ----------------------
SIST EN ISO 5923:2013
EUROPEAN STANDARD
EN ISO 5923
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2012
ICS 13.220.10 Supersedes EN 25923:1993
English Version
Equipment for fire protection and fire fighting - Fire extinguishing
media - Carbon dioxide (ISO 5923:2012)
Équipement de protection et de lutte contre l'incendie - Ausrüstung für Brandschutz und Brandbekämpfung -
Agents extincteurs - Dioxyde de carbone (ISO 5923:2012) Löschmittel - Kohlenstoffdioxid (ISO 5923:2012)
This European Standard was approved by CEN on 14 August 2012.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same
status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2012 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 5923:2012: E
worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 5923:2013
EN ISO 5923:2012 (E)
Contents Page
Foreword .3
2
---------------------- Page: 4 ----------------------
SIST EN ISO 5923:2013
EN ISO 5923:2012 (E)
Foreword
This document (EN ISO 5923:2012) has been prepared by Technical Committee ISO/TC 21 "Equipment for
fire protection and fire fighting" in collaboration with Technical Committee CEN/TC 191 “Fixed firefighting
systems” the secretariat of which is held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by February 2013, and conflicting national standards shall be withdrawn
at the latest by February 2013.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 25923:1993.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Endorsement notice
The text of ISO 5923:2012 has been approved by CEN as a EN ISO 5923:2012 without any modification.
3
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SIST EN ISO 5923:2013
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SIST EN ISO 5923:2013
INTERNATIONAL ISO
STANDARD 5923
Third edition
2012-08-15
Equipment for fire protection and fire
fighting — Fire extinguishing media —
Carbon dioxide
Équipement de protection et de lutte contre l’incendie — Agents
extincteurs — Dioxyde de carbone
Reference number
ISO 5923:2012(E)
©
ISO 2012
---------------------- Page: 7 ----------------------
SIST EN ISO 5923:2013
ISO 5923:2012(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2012
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO’s
member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2012 – All rights reserved
---------------------- Page: 8 ----------------------
SIST EN ISO 5923:2013
ISO 5923:2012(E)
Contents Page
Foreword .iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Requirements . 1
5 Sampling . 2
5.1 General . 2
5.2 Sampling equipment . 2
5.3 Procedure . 2
6 Methods of test . 3
6.1 Safety warning . 3
6.2 Purity . 3
6.3 Water content . 3
6.4 Oil content . 3
6.5 Total sulfur compounds content . 3
7 Packaging and labelling . 3
Annex A (informative) Determination of water content . 4
Annex B (normative) Determination of oil content . 6
Annex C (normative) Determination of total sulfur compounds content . 9
Annex D (informative) General properties .12
Annex E (normative) Precautions for handling .13
Annex F (informative) Compatibility .14
Annex G (informative) Toxicology .15
© ISO 2012 – All rights reserved iii
---------------------- Page: 9 ----------------------
SIST EN ISO 5923:2013
ISO 5923:2012(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International
Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 5923 was prepared by Technical Committee ISO/TC 21, Equipment for fire protection and fire fighting,
Subcommittee SC 8, Gaseous media and firefighting systems using gas.
This third edition cancels and replaces the second edition (ISO 5923:1989), which has been technically revised.
iv © ISO 2012 – All rights reserved
---------------------- Page: 10 ----------------------
SIST EN ISO 5923:2013
ISO 5923:2012(E)
Introduction
This International Standard is one of a series of other International Standards giving specifications for fire
extinguishing media in common use and which are in need of a specification for fire fighting purposes. These
specifications are designed to establish that the medium in question has at least a minimum useful fire
extinguishing capability and can therefore be reasonably sold for fire extinguishing purposes.
Requirements for media used in particular equipment will form the subject of future International Standards.
Annexes A to C of this International Standard specify methods for determining, respectively, water, oil and total
sulfur compounds contents. Annexes D to G provide important information on, and give recommendations relating
to, the safety and use of carbon dioxide, and they should be read carefully by all concerned with this medium.
© ISO 2012 – All rights reserved v
---------------------- Page: 11 ----------------------
SIST EN ISO 5923:2013
---------------------- Page: 12 ----------------------
SIST EN ISO 5923:2013
INTERNATIONAL STANDARD ISO 5923:2012(E)
Equipment for fire protection and fire fighting — Fire
extinguishing media — Carbon dioxide
1 Scope
This International Standard specifies requirements for carbon dioxide for use as a fire extinguishing medium.
2 Normative references
The following referenced documents are indispensable for the application 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.
ISO 385:2005, Laboratory glassware — Burettes
ISO 648:2008, Laboratory glassware — Single-volume pipettes
ISO 2591-1:1988, Test sieving — Part 1: Methods using test sieves of woven wire cloth and perforated metal plate
ISO 3310-1:2000, Test sieves — Technical requirements and testing — Part 1: Test sieves of metal wire cloth
3 Terms and definitions
For the purposes of this document, the following definition applies.
3.1
carbon dioxide
C0
2
chemical compound C0 used as a fire extinguishing medium
2
4 Requirements
Carbon dioxide shall comply with the requirements of Table 1 below, when tested by the appropriate method
of test specified in Clause 6.
Table 1 — Requirements for carbon dioxide properties
Property Requirements
Purity, o/o (VI V) min. 99,5
Water content, o/o (m/m) max. 0,015
Oil content, ppm by mass, max. 5
Total sulfur compounds content, expressed as sulfur, ppm by mass, max. 5,0
NOTE Carbon dioxide obtained by converting dry ice to liquid will not usually comply with these requirements unless it
has been properly processed to remove excess water and oil.
© ISO 2012 – All rights reserved 1
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SIST EN ISO 5923:2013
ISO 5923:2012(E)
5 Sampling
5.1 General
Samples of carbon dioxide needed to perform all of the tests required by this International Standard shall be
taken from the same manufacturing lot, using identical sampling procedures.
NOTE Attention is drawn to the need to design equipment for handling carbon dioxide such that it is either capable of
withstanding the pressures involved or is protected from them.
5.2 Sampling equipment
Rigid metal connections or a flexible reinforced nylon hose should be used throughout the sampling equipment
and shall be kept as short as possible. All components shall have a design pressure of not less than 137 bar.
5.3 Procedure
5.3.1 General
Two methods of sampling are specified:
a) direct sampling, in which the sample is passed to an evaporator and then directly to the analytical apparatus;
b) sampling in cylinders, in which case the sample is transferred in a cylinder to a laboratory.
Other methods may be used provided that they are shown to give equally representative samples on analysis
(see Annexes A to C).
5.3.2 Direct sampling
Connect the sampling valve by means of suitable connections (see 5.2) to an evaporating device and then via
a T-piece (the free leg of which is connected to the dip-tube of a Drechsel bottle containing 50 mm of mercury
covered by a layer of water on the carbon dioxide side) to the analytical apparatus. Thoroughly flush the
connections, valves and the evaporating device with carbon dioxide before starting to take the sample.
5.3.3 Sampling in cylinders
Use a cylinder of water capacity 1,4 kg or 2,0 kg and with a valve at each end.
An internal copper dip-tube of diameter at least 5 mm and of length equal to one-third of the length of the cylinder
shall be brazed to the base of one valve, which shall be clearly identified. The cylinder shall be coated internally
with tin [containing 1 % (m/m) of lead] applied by hot dipping the cylinder after the walls have been descaled.
First clean the sampling cylinder by removing both valves and washing the inside of the cylinder with carbon
tetrachloride. Purge with a current of dry filtered air. Wash with methanol and repeat the purging. Degrease the
valves using carbon tetrachloride, then refit them. The methanol and carbon tetrachloride used shall comply
with the requirements specified in B.2.
Support the cylinder vertically with its dip-tube valve uppermost. Before taking the sample, thoroughly flush the
cylinder with a small quantity of liquid carbon dioxide, first through the top valve and then through the bottom
valve. Repeat this flushing procedure, and leave the cylinder connected to the liquid carbon dioxide source via
its lower valve. Then, with the upper valve closed, open the lower valve to admit liquid carbon dioxide to the
cylinder. Partly open the upper (dip-tube) valve and continue filling until carbon dioxide snow is discharged from
this valve. Close both valves. Open the top valve several times for brief intervals until only carbon dioxide gas
is discharged from it. The free end of the dip-tube inside the cylinder will then be just above the liquid carbon
dioxide level in the cylinder.
Samples shall be analysed as soon as reasonably practicable after collection. To withdraw the sample for
analysis, support the sampling cylinder vertically with the dip-tube valve at the top. Connect the bottom valve
2 © ISO 2012 – All rights reserved
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SIST EN ISO 5923:2013
ISO 5923:2012(E)
of the sampling cylinder (liquid carbon dioxide) to an evaporating device and thence via a T-piece, the free
leg of which is connected to a tube as described in 5.3.2, to the analytical apparatus. Thoroughly flush the
connections, valves and the evaporating device with carbon dioxide before starting the analysis.
When sampling for the determination of water content, heat the connections to above the dew point to prevent
condensation during purging.
6 Methods of test
6.1 Safety warning
Attention is drawn to the need to design equipment for handling carbon dioxide such that it is either capable of
withstanding the pressures involved or is protected from them.
6.2 Purity
Determine the purity by gas-liquid chromatography, using generally accepted laboratory techniques, or use a
volumetric analyser.
The method used shall be capable of determining the purity with an accuracy of at least 0,1 %.
The sample shall not constitute more than 10 % of the original quantity of carbon dioxide contained in the
sample container.
6.3 Wat
...
SLOVENSKI STANDARD
kSIST FprEN ISO 5923:2012
01-junij-2012
2SUHPD]DSRåDUQR]DãþLWRLQJDãHQMH*DVLOD2JOMLNRYGLRNVLG ,62)',6
Equipment for fire protection and fire fighting - Fire extinguishing media - Carbon dioxide
(ISO/FDIS 5923:2012)
Einführendes Element - Haupt-Element - Ergänzendes Element (ISO/FDIS 5923:2012)
Équipement de protection et de lutte contre l'incendie - Agents extincteurs - Dioxyde de
carbone (ISO/FDIS 5923:2012)
Ta slovenski standard je istoveten z: FprEN ISO 5923
ICS:
13.220.10 Gašenje požara Fire-fighting
kSIST FprEN ISO 5923:2012 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
kSIST FprEN ISO 5923:2012
---------------------- Page: 2 ----------------------
kSIST FprEN ISO 5923:2012
EUROPEAN STANDARD
FINAL DRAFT
FprEN ISO 5923
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2012
ICS 13.220.10 Will supersede EN 25923:1993
English Version
Equipment for fire protection and fire fighting - Fire extinguishing
media - Carbon dioxide (ISO/FDIS 5923:2012)
Équipement de protection et de lutte contre l'incendie -
Agents extincteurs - Dioxyde de carbone (ISO/FDIS
5923:2012)
This draft European Standard is submitted to CEN members for unique acceptance procedure. It has been drawn up by the Technical
Committee CEN/TC 191.
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, 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
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2012 CEN All rights of exploitation in any form and by any means reserved Ref. No. FprEN ISO 5923:2012: E
worldwide for CEN national Members.
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kSIST FprEN ISO 5923:2012
FprEN ISO 5923:2012 (E)
Contents Page
Foreword .3
2
---------------------- Page: 4 ----------------------
kSIST FprEN ISO 5923:2012
FprEN ISO 5923:2012 (E)
Foreword
This document (FprEN ISO 5923:2012) has been prepared by Technical Committee ISO/TC 21 "Equipment
for fire protection and fire fighting" in collaboration with Technical Committee CEN/TC 191 “Fixed firefighting
systems” the secretariat of which is held by BSI.
This document is currently submitted to the Unique Acceptance Procedure.
This document will supersede EN 25923:1993.
Endorsement notice
The text of ISO/FDIS 5923:2012 has been approved by CEN as a FprEN ISO 5923:2012 without any
modification.
3
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kSIST FprEN ISO 5923:2012
---------------------- Page: 6 ----------------------
kSIST FprEN ISO 5923:2012
FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 5923
ISO/TC21/SC8
Equipment for fire protection and fire
Secretariat: SA
fighting — Fire extinguishing media —
Voting begins on:
Carbon dioxide
2012-03-29
Voting terminates on:
Équipement de protection et de lutte contre l’incendie — Agents
2012-05-29
extincteurs — Dioxyde de carbone
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 SUPPOR
TING DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO
ISO/FDIS 5923:2012(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN
DARDS TO WHICH REFERENCE MAY BE MADE IN
©
NATIONAL REGULATIONS. ISO 2012
---------------------- Page: 7 ----------------------
kSIST FprEN ISO 5923:2012
ISO/FDIS 5923:2012(E)
Copyright notice
This ISO document is a Draft International Standard and is copyrightprotected by ISO. Except as permitted
under the applicable laws of the user’s country, neither this ISO draft nor any extract from it may be reproduced,
stored in a retrieval system or transmitted in any form or by any means, electronic, photocopying, recording
or otherwise, without prior written permission being secured.
Requests for permission to reproduce should be addressed to either ISO at the address below or ISO’s
member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
Email copyright@iso.org
Web www.iso.org
Reproduction may be subject to royalty payments or a licensing agreement.
Violators may be prosecuted.
ii © ISO 2012 – All rights reserved
---------------------- Page: 8 ----------------------
kSIST FprEN ISO 5923:2012
ISO/FDIS 5923:2012(E)
Contents Page
Foreword .iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Requirements . 1
5 Sampling . 2
5.1 General . 2
5.2 Sampling equipment . 2
5.3 Procedure . 2
6 Methods of test . 3
6.1 Safety warning . 3
6.2 Purity . 3
6.3 Water content . 3
6.4 Oil content . 3
6.5 Total sulfur compounds content . 3
7 Packaging and labelling . 3
Annex A (informative) Determination of water content . 4
Annex B (normative) Determination of oil content . 6
Annex C (normative) Determination of total sulfur compounds content . 9
Annex D (informative) General properties .12
Annex E (normative) Precautions for handling .13
Annex F (informative) Compatibility .14
Annex G (informative) Toxicology .15
© ISO 2012 – All rights reserved iii
---------------------- Page: 9 ----------------------
kSIST FprEN ISO 5923:2012
ISO/FDIS 5923:2012(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International
Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 5923 was prepared by Technical Committee ISO/TC 21, Equipment for fire protection and fire fighting ,
Subcommittee SC 8, Gaseous media and firefighting systems using gas .
This third edition cancels and replaces the second edition (ISO 5923:1989), which has been technically revised.
iv © ISO 2012 – All rights reserved
---------------------- Page: 10 ----------------------
kSIST FprEN ISO 5923:2012
ISO/FDIS 5923:2012(E)
Introduction
This International Standard is one of a series of other International Standards giving specifications for fire
extinguishing media in common use and which are in need of a specification for fire fighting purposes. These
specifications are designed to establish that the medium in question has at least a minimum useful fire
extinguishing capability and can therefore be reasonably sold for fire extinguishing purposes.
Requirements for media used in particular equipment will form the subject of future International Standards.
Annexes A to C of this International Standard specify methods for determining, respectively, water, oil and total
sulfur compounds contents. Annexes D to G provide important information on, and give recommendations relating
to, the safety and use of carbon dioxide, and they should be read carefully by all concerned with this medium.
© ISO 2012 – All rights reserved v
---------------------- Page: 11 ----------------------
kSIST FprEN ISO 5923:2012
---------------------- Page: 12 ----------------------
kSIST FprEN ISO 5923:2012
FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 5923:2012(E)
Equipment for fire protection and fire fighting — Fire
extinguishing media — Carbon dioxide
1 Scope
This International Standard specifies requirements for carbon dioxide for use as a fire extinguishing medium.
2 Normative references
The following referenced documents are indispensable for the application 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.
ISO 385:2005, Laboratory glassware — Burettes
ISO 648:2008, Laboratory glassware — Single-volume pipettes
ISO 25911 :1988, Test sieving — Part 1: Methods using test sieves of woven wire cloth and perforated metal plate
ISO 3310 1:2000, Test sieves — Technical requirements and testing — Part 1: Test sieves of metal wire cloth
3 Terms and definitions
For the purposes of this document, the following definition applies.
3.1
carbon dioxide
C0
2
chemical compound C0 used as a fire extinguishing medium
2
4 Requirements
Carbon dioxide shall comply with the requirements of Table 1 below, when tested by the appropriate method
of test specified in Clause 6.
Table 1 — Requirements for carbon dioxide properties
Property Requirements
Purity, o/o (VI V) min. 99,5
Water content, o/o (m/m) max. 0,015
Oil content, ppm by mass, max. 5
Total sulfur compounds content, expressed as sulfur, ppm by mass, max. 5,0
NOTE Carbon dioxide obtained by converting dry ice to liquid will not usually comply with these requirements unless it
has been properly processed to remove excess water and oil.
© ISO 2012 – All rights reserved 1
---------------------- Page: 13 ----------------------
kSIST FprEN ISO 5923:2012
ISO/FDIS 5923:2012(E)
5 Sampling
5.1 General
Samples of carbon dioxide needed to perform all of the tests required by this International Standard shall be
taken from the same manufacturing lot, using identical sampling procedures.
NOTE Attention is drawn to the need to design equipment for handling carbon dioxide such that it is either capable of
withstanding the pressures involved or is protected from them.
5.2 Sampling equipment
Rigid metal connections or a flexible reinforced nylon hose should be used throughout the sampling equipment
and shall be kept as short as possible. All components shall have a design pressure of not less than 137 bar.
5.3 Procedure
5.3.1 General
Two methods of sampling are specified:
a) direct sampling, in which the sample is passed to an evaporator and then directly to the analytical apparatus;
b) sampling in cylinders, in which case the sample is transferred in a cylinder to a laboratory.
Other methods may be used provided that they are shown to give equally representative samples on analysis
(see Annexes A to C).
5.3.2 Direct sampling
Connect the sampling valve by means of suitable connections (see 5.2) to an evaporating device and then via
a T piece (the free leg of which is connected to the dip tube of a Drechsel bottle containing 50 mm of mercury
covered by a layer of water on the carbon dioxide side) to the analytical apparatus. Thoroughly flush the
connections, valves and the evaporating device with carbon dioxide before starting to take the sample.
5.3.3 Sampling in cylinders
Use a cylinder of water capacity 1,4 kg or 2,0 kg and with a valve at each end.
An internal copper dip tube of diameter at least 5 mm and of length equal to one third of the length of the cylinder
shall be brazed to the base of one valve, which shall be clearly identified. The cylinder shall be coated internally
with tin [containing 1 % (m/m) of lead] applied by hot dipping the cylinder after the walls have been descaled.
First clean the sampling cylinder by removing both valves and washing the inside of the cylinder with carbon
tetrachloride. Purge with a current of dry filtered air. Wash with methanol and repeat the purging. Degrease the
valves using carbon tetrachloride, then refit them. The methanol and carbon tetrachloride used shall comply
with the requirements specified in B.2.
Support the cylinder vertically with its dip-tube valve uppermost. Before taking the sample, thoroughly flush the
cylinder with a small quantity of liquid carbon dioxide, first through the top valve and then through the bottom
valve. Repeat this flushing procedure, and leave the cylinder connected to the liquid carbon dioxide source via
its lower valve. Then, with the upper valve closed, open the lower valve to admit liquid carbon dioxide to the
cylinder. Partly open the upper (dip-tube) valve and continue filling until carbon dioxide snow is discharged from
this valve. Close both valves. Open the top valve several times for brief intervals until only carbon dioxide gas
is discharged from it. The free end of the dip tube inside the cylinder will then be just above the liquid carbon
dioxide level in the cylinder.
Samples shall be analysed as soon as reasonably practicable after collection. To withdraw the sample for
analysis, support the sampling cylinder vertically with the dip tube valve at the top. Connect the bottom valve
2 © ISO 2012 – All rights reserved
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kSIST FprEN ISO 5923:2012
ISO/FDIS 5923:2012(E)
of the sampling cylinder (liquid carbon dioxide) to an evaporating device and thence via a T piece, the free
leg of which is connected to a tube as described in 5.3.2, to the analytical apparatus. Thoroughly flush the
connections, valves and the evaporating device with carbon dioxide before starting the analysis.
When sampling for the determination of water content, heat the connections to above the dew point to prevent
condensation during purging.
6 Methods of test
6.1 Safety warning
Attention is drawn to the need to design equipment for handling carbon dioxide such that it is either capable of
withstanding the pressures involved or is protected from them.
6.2 Purity
Determine the purity by gas liquid chromatography, using generally accepted laboratory techniques, or use a
volumetric analyser.
The method used shall be capable of determining the purity with an accuracy of at least 0,1 %.
The sample shall not constitu
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