Gaseous fire-extinguishing systems -- Physical properties and system design

This document contains specific requirements for gaseous fire-extinguishing systems, with respect to FK-5-1-12 extinguishant. It includes details of physical properties, specifications, usage and safety aspects. This document is applicable only to systems operating at nominal pressures of 25 bar, 34,5 bar, 42 bar and 50 bar with nitrogen propellant. This does not preclude the use of other systems.

Systèmes d'extinction d'incendie utilisant des agents gazeux -- Propriétés physiques et conception des systèmes

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Status
Published
Publication Date
30-Jun-2019
Current Stage
6060 - International Standard published
Start Date
24-May-2019
Completion Date
01-Jul-2019
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ISO 14520-5:2019 - Gaseous fire-extinguishing systems -- Physical properties and system design
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INTERNATIONAL ISO
STANDARD 14520-5
Third edition
2019-06
Gaseous fire-extinguishing systems —
Physical properties and system
design —
Part 5:
FK-5-1-12 extinguishant
Systèmes d'extinction d'incendie utilisant des agents gazeux —
Propriétés physiques et conception des systèmes —
Partie 5: Agent extincteur FK-5-1-12
Reference number
ISO 14520-5:2019(E)
ISO 2019
---------------------- Page: 1 ----------------------
ISO 14520-5:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019

All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
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Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 14520-5:2019(E)
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 FK-5-1-12 systems .............................................................................................................................................................. 2

5 Safety of personnel ............................................................................................................................................................................................. 5

6 System design .......................................................................................................................................................................................................... 5

6.1 Fill density................................................................................................................................................................................................... 5

6.2 Superpressurization ........................................................................................................................................................................... 6

6.3 Extinguishant quantity ..................................................................................................................................................................... 6

6.4 Other fill density and superpressurization levels ..................................................................................................... 9

7 Environmental properties .......................................................................................................................................................................... 9

Bibliography .............................................................................................................................................................................................................................11

© ISO 2019 – All rights reserved iii
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ISO 14520-5:2019(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.

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 of the voluntary nature of standards, 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 www .iso

.org/iso/foreword .html.

This document 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 14520-5:2016), which has been

technically revised. The main changes compared to the previous edition are as follows:

— a new subclause 6.4 on fill density and superpressurization levels has been added.

A list of all parts in the ISO 14520 series can be found on the ISO website.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/members .html.
iv © ISO 2019 – All rights reserved
---------------------- Page: 4 ----------------------
INTERNATIONAL STANDARD ISO 14520-5:2019(E)
Gaseous fire-extinguishing systems — Physical properties
and system design —
Part 5:
FK-5-1-12 extinguishant
1 Scope

This document contains specific requirements for gaseous fire-extinguishing systems, with respect

to FK-5-1-12 extinguishant. It includes details of physical properties, specifications, usage and safety

aspects.

This document is applicable only to systems operating at nominal pressures of 25 bar, 34,5 bar, 42 bar

and 50 bar with nitrogen propellant. 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, 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 FK-5-1-12 shall comply with the specification shown in Table 1.

FK-5-1-12 is a clear, colourless, almost odourless, electrically non-conductive gas with a density

approximately 11 times that of air.
The physical properties are shown in Table 2.

FK-5-1-12 extinguishes fires mainly by physical means, but also by some chemical means.

Table 1 — Specification for FK-5-1-12
Property Requirement
Purity 99,0 % mol/mol min.
© ISO 2019 – All rights reserved 1
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ISO 14520-5:2019(E)
Table 1 (continued)
Property Requirement
Acidity 3 × 10 by mass, max.
Water content 0,001 % by mass, max.
Non-volatile residue 0,03 % by mass, max.
Suspended matter or sediment None visible
Table 2 — Physical properties of FK-5-1-12
Property Units Value
Molecular mass n/a 316,04
Boiling point at 1 013 bar (absolute) °C 49,2
Freezing point °C –108,0
Critical temperature °C 168,66
Critical pressure bar 18,646
Critical volume cc/mole 494,5
Critical density kg/m 639,1
Vapour pressure 20 °C bar abs 0,326 0
Liquid density 20 °C g/ml 1,616
Saturated vapour density 20 °C kg/m 4,330 5
Specific volume of superheated
m /kg 0,071 9
vapour at 1 013 bar and 20 °C
Heat of vapourization at boiling
KJ/kg 88,0
point
Chemical formula CF CF C(O)CF(CF )
3 2 3 2
Chemical name
Dodecafluoro-2-methylpentan-3-one
4.2 Use of FK-5-1-12 systems

FK-5-1-12 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 heptane and Surface Class A hazards

are shown in Table 4. Concentrations for other fuels are shown in Table 5 and inerting concentrations

in Table 6.
Table 3 — FK-5-1-12 total flooding quantity
Temperature Specific
FK-5-1-12 mass requirements per unit volume of protected space, m/V (kg/m )
volume
T S Design concentration (by volume)
°C m /kg 3 % 4 % 5 % 6 % 7 % 8 % 9 % 10 %
–20 0,060 9 0,507 7 0,684 0 0,864 0 1,040 7 1,235 7 1,427 5 1,623 6 1,824 1
–15 0,062 3 0,496 5 0,669 0 0,845 0 1,024 8 1,208 4 1,396 1 1,587 9 1,783 9
–10 0,063 7 0,485 9 0,654 5 0,826 8 1,002 7 1,182 4 1,366 0 1,553 7 1,745 5
–5 0,065 0 0,475 6 0,640 7 0,809 4 0,981 6 1,157 5 1,337 2 1,520 9 1,708 7
0 0,066 4 0,465 8 0,627 5 0,792 6 0,961 3 1,133 6 1,309 6 1,489 5 1,673 4
5 0,067 8 0,456 4 0,614 8 0,776 6 0,941 8 1,110 6 1,283 1 1,459 3 1,639 5
2 © ISO 2019 – All rights reserved
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ISO 14520-5:2019(E)
Table 3 (continued)
Temperature Specific
FK-5-1-12 mass requirements per unit volume of protected space, m/V (kg/m )
volume
T S Design concentration (by volume)
°C m /kg 3 % 4 % 5 % 6 % 7 % 8 % 9 % 10 %
10 0,069 1 0,447 3 0,602 6 0,761 2 0,923 2 1,088 6 1,257 6 1,430 4 1,607 0
15 0,070 5 0,438 6 0,590 9 0,746 4 0,905 2 1,067 4 1,233 2 1,402 6 1,575 7
20 0,071 9 0,430 2 0,579 6 0,732 2 0,887 9 1,047 1 1,209 6 1,375 8 1,545 7
25 0,073 3 0,422 2 0,568 8 0,718 4 0,871 3 1,027 5 1,187 0 1,350 0 1,516 7
30 0,074 6 0,414 4 0,558 3 0,705 2 0,855 3 1,008 6 1,165 2 1,325 2 1,488 8
35 0,076 0 0,406 9 0,548 2 0,692 5 0,839 9 0,990 4 1,144 2 1,301 3 1,462 0
40 0,077 4 0,399 7 0,538 5 0,680 2 0,825 0 0,972 8 1,123 9 1,278 3 1,436 1
45 0,078 7 0,392 8 0,529 1 0,668 4 0,810 6 0,9
...

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