ISO 14520-11:2016
(Main)Gaseous fire-extinguishing systems — Physical properties and system design — Part 11: HFC 236fa extinguishant
Gaseous fire-extinguishing systems — Physical properties and system design — Part 11: HFC 236fa extinguishant
ISO 14520-11:2016 contains specific requirements for gaseous fire-extinguishing systems, with respect to the HFC 236fa extinguishant. It includes details of physical properties, specification, usage and safety aspects. ISO 14520-11:2016 covers systems operating at nominal pressures of 25 bar and 42 bar superpressurized with nitrogen. This does not preclude the use of other systems.
Systèmes d'extinction d'incendie utilisant des agents gazeux — Propriétés physiques et conception des systèmes — Partie 11: Agent extincteur HFC 236fa
Naprave za gašenje s plinom - Fizikalne lastnosti in projektiranje - 11. del: Gasilo HFC 236fa
Ta dokument vsebuje specifične zahteve za naprave za gašenje s plinom v povezavi z gasilom HFC 236fa. Vsebuje podrobnosti o fizičnih lastnostih, specifikacijah, uporabi in varnostnih vidikih.
Ta dokument zajema sisteme, ki delujejo pri nazivnih tlakih 25 in 42 barov, ki so pod izjemnim tlakom, doseženim z dušikom. To ne izključuje uporabe drugih sistemov.
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
01-oktober-2018
Naprave za gašenje s plinom - Fizikalne lastnosti in projektiranje - 11. del: Gasilo
HFC 236fa
Gaseous fire-extinguishing systems -- Physical properties and system design -- Part 11:
HFC 236fa extinguishant
Systèmes d'extinction d'incendie utilisant des agents gazeux -- Propriétés physiques et
conception des systèmes -- Partie 11: Agent extincteur HFC 236fa
Ta slovenski standard je istoveten z: ISO 14520-11:2016
ICS:
13.220.10 Gašenje požara Fire-fighting
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
INTERNATIONAL ISO
STANDARD 14520-11
Third edition
2016-10-01
Gaseous fire-extinguishing systems —
Physical properties and system
design —
Part 11:
HFC 236fa extinguishant
Systèmes d’extinction d’incendie utilisant des agents gazeux —
Propriétés physiques et conception des systèmes —
Partie 11: Agent extincteur HFC 236fa
Reference number
©
ISO 2016
© ISO 2016, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2016 – All rights reserved
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Characteristics and uses . 1
4.1 General . 1
4.2 Use of HFC 236fa systems . 2
5 Safety of personnel . 5
6 System design . 6
6.1 Fill density. 6
6.2 Superpressurization . 7
6.3 Extinguishant quantity . 7
7 Environmental properties . 8
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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment,
as well as information about ISO’s adherence to the World Trade Organization (WTO) principles in the
Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.
The committee responsible for this document is ISO/TC 21, Equipment for fire protection and fire fighting,
Subcommittee SC 8, Gaseous media and fire fighting systems using gas.
This third edition cancels and replaces the second edition (ISO 14520-11:2005), which has been
technically revised with the following changes:
— in Table 5, minimum design data was corrected from previous edition; all but values for ethanol and
methanol were incorrect;
— added Clause 7.
A list of all parts in the ISO 14520 series can be found on the ISO website.
iv © ISO 2016 – All rights reserved
INTERNATIONAL STANDARD ISO 14520-11:2016(E)
Gaseous fire-extinguishing systems — Physical properties
and system design —
Part 11:
HFC 236fa extinguishant
1 Scope
This document contains specific requirements for gaseous fire-extinguishing systems, with respect to
the HFC 236fa extinguishant. It includes details of physical properties, specification, usage and safety
aspects.
This document covers systems operating at nominal pressures of 25 bar and 42 bar superpressurized
with nitrogen. This does not preclude the use of other systems.
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.
ISO 14520-1:2015, Gaseous fire-extinguishing systems — Physical properties and system design —
Part 1: General requirements.
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 14520-1 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
4 Characteristics and uses
4.1 General
Extinguishant HFC 236fa shall comply with the specification shown in Table 1.
HFC 236fa is a colourless, almost odourless, electrically non-conductive gas with a density approximately
five times that of air.
The physical properties are shown in Table 2.
HFC 236fa extinguishes fires mainly by physical means, but also by some chemical means.
Table 1 — Specification for HFC 236fa
Property Requirement
Purity 99,6% by mass, min.
–6
Acidity 3 × 10 by mass, max.
–6
Water content 10 × 10 by mass, max.
Non-volatile residue 0,01 % by mass, max.
Suspended matter or sediment None visible
Table 2 — Physical properties of HFC 236fa
Property Units Value
Molecular mass — 152
Boiling point at 1,013 bar (absolute) °C –1,4
Freezing point °C –103
Critical temperature °C 124,9
Critical pressure bar abs 32,00
Critical volume cm /mol 274,0
Critical density kg/m 551,3
Vapour pressure 20 °C bar abs 2,296
Liquid density 20 °C kg/m 1 377
Saturated vapour density 20 °C kg/m 15,58
Specific volume of superheated vapour m /kg 0,1529
at 1,013 bar and 20 °C
Chemical formula CF CH CF
3 2 3
Chemical name
Hexafluoropropane
4.2 Use of HFC 236fa systems
HFC 236fa total flooding systems may be used for extinguishing fires of all classes within the limits
specified in ISO 14520-1:2015, Clause 4.
The extinguishant requirements per volume of protected space are shown in Table 3 for various levels
of concentration. These are based on methods shown in ISO 14520-1:2015, 7.6.
The extinguishing concentrations and design concentrations for various types of hazard are shown in
Table 4. Concentrations for other fuels are shown in Table 5.
2 © ISO 2016 – All rights reserved
Table 3 — HFC 236fa total flooding quantity
Tempera- Specific HFC 236fa mass requirements per unit volume of protected space, m/V (kg/m )
ture vapour
volume
Design concentration (by volume)
T
S
°C
m /kg 5 % 6 % 7 % 8 % 9 % 10 % 11 % 12 % 13 % 14 % 15 %
0 0,141 3
...
INTERNATIONAL ISO
STANDARD 14520-11
Third edition
2016-10-01
Gaseous fire-extinguishing systems —
Physical properties and system
design —
Part 11:
HFC 236fa extinguishant
Systèmes d’extinction d’incendie utilisant des agents gazeux —
Propriétés physiques et conception des systèmes —
Partie 11: Agent extincteur HFC 236fa
Reference number
©
ISO 2016
© ISO 2016, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2016 – All rights reserved
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Characteristics and uses . 1
4.1 General . 1
4.2 Use of HFC 236fa systems . 2
5 Safety of personnel . 5
6 System design . 6
6.1 Fill density. 6
6.2 Superpressurization . 7
6.3 Extinguishant quantity . 7
7 Environmental properties . 8
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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment,
as well as information about ISO’s adherence to the World Trade Organization (WTO) principles in the
Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.
The committee responsible for this document is ISO/TC 21, Equipment for fire protection and fire fighting,
Subcommittee SC 8, Gaseous media and fire fighting systems using gas.
This third edition cancels and replaces the second edition (ISO 14520-11:2005), which has been
technically revised with the following changes:
— in Table 5, minimum design data was corrected from previous edition; all but values for ethanol and
methanol were incorrect;
— added Clause 7.
A list of all parts in the ISO 14520 series can be found on the ISO website.
iv © ISO 2016 – All rights reserved
INTERNATIONAL STANDARD ISO 14520-11:2016(E)
Gaseous fire-extinguishing systems — Physical properties
and system design —
Part 11:
HFC 236fa extinguishant
1 Scope
This document contains specific requirements for gaseous fire-extinguishing systems, with respect to
the HFC 236fa extinguishant. It includes details of physical properties, specification, usage and safety
aspects.
This document covers systems operating at nominal pressures of 25 bar and 42 bar superpressurized
with nitrogen. This does not preclude the use of other systems.
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.
ISO 14520-1:2015, Gaseous fire-extinguishing systems — Physical properties and system design —
Part 1: General requirements.
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 14520-1 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
4 Characteristics and uses
4.1 General
Extinguishant HFC 236fa shall comply with the specification shown in Table 1.
HFC 236fa is a colourless, almost odourless, electrically non-conductive gas with a density approximately
five times that of air.
The physical properties are shown in Table 2.
HFC 236fa extinguishes fires mainly by physical means, but also by some chemical means.
Table 1 — Specification for HFC 236fa
Property Requirement
Purity 99,6% by mass, min.
–6
Acidity 3 × 10 by mass, max.
–6
Water content 10 × 10 by mass, max.
Non-volatile residue 0,01 % by mass, max.
Suspended matter or sediment None visible
Table 2 — Physical properties of HFC 236fa
Property Units Value
Molecular mass — 152
Boiling point at 1,013 bar (absolute) °C –1,4
Freezing point °C –103
Critical temperature °C 124,9
Critical pressure bar abs 32,00
Critical volume cm /mol 274,0
Critical density kg/m 551,3
Vapour pressure 20 °C bar abs 2,296
Liquid density 20 °C kg/m 1 377
Saturated vapour density 20 °C kg/m 15,58
Specific volume of superheated vapour m /kg 0,1529
at 1,013 bar and 20 °C
Chemical formula CF CH CF
3 2 3
Chemical name
Hexafluoropropane
4.2 Use of HFC 236fa systems
HFC 236fa total flooding systems may be used for extinguishing fires of all classes within the limits
specified in ISO 14520-1:2015, Clause 4.
The extinguishant requirements per volume of protected space are shown in Table 3 for various levels
of concentration. These are based on methods shown in ISO 14520-1:2015, 7.6.
The extinguishing concentrations and design concentrations for various types of hazard are shown in
Table 4. Concentrations for other fuels are shown in Table 5.
2 © ISO 2016 – All rights reserved
Table 3 — HFC 236fa total flooding quantity
Tempera- Specific HFC 236fa mass requirements per unit volume of protected space, m/V (kg/m )
ture vapour
volume
Design concentration (by volume)
T
S
°C
m /kg 5 % 6 % 7 % 8 % 9 % 10 % 11 % 12 % 13 % 14 % 15 %
0 0,141 3 0,372 0,451 0,532 0,615 0,699 0,786 0,874 0,965 1,057 1,152 1,248
5 7 7 4 9 3 7 1 5 1 9
5 0,144 2 0,365 0,442 0,522 0,603 0,686 0,770 0,857 0,945 1,036 1,129 1,224
0 7 0 1 0 6 2 8 4 1 0
10 0,147 1 0,357 0,434 0,511 0,591 0,672 0,755 0,840 0,927 1,016 1,107 1,200
9 0 8 3 5 5 4 3 1 0 0
15 0,149 9 0,351 0,425 0,502 0,579 0,659 0,741 0,824 0,909 0,996 1,085 1,176
0 7 0 9 6 0 3 5 6 7 9
20 0,152 8 0,344 0,417 0,492 0,569 0,647 0,727 0,808 0,892 0,977 1,065 1,154
4 7 5 0 2 1 8 3 8 2 8
25 0,155
...
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