ISO 14520-12:2015

INTERNATIONAL ISO
STANDARD 14520-12
Third edition
2015-02-15
Gaseous fire-extinguishing
systems — Physical properties and
system design —
Part 12:
IG-01 extinguishant
Systèmes d’extinction d’incendie utilisant des agents gazeux —
Propriétés physiques et conception des systèmes —
Partie 12: Agent extincteur IG-01
Reference number
©
ISO 2015
© ISO 2015
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ii © ISO 2015 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Normative reference . 1
3 Terms and definitions . 1
4 Characteristics and uses . 1
4.1 General . 1
4.2 Use of IG-01 systems . 2
5 Safety of personnel . 5
6 System design . 6
6.1 Fill pressure . 6
6.2 Superpressurization . 6
6.3 Extinguishant quantity . 6
7 Environmental properties . 7
Foreword
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The committee responsible for this document is ISO/TC 21, Equipment for fire protection and fire fighting,
Subcommittee SC 8, Gaseous media firefighting systems using gas.
This third edition cancels and replaces the second edition (ISO 14520-12:2005), which has been
technically revised.
ISO 14520 consists of the following parts, under the general title Gaseous fire-extinguishing systems —
Physical properties and system design:
— Part 1: General requirements
— Part 2: CF3I extinguishant
— Part 5: FK-5-1-12 extinguishant
— Part 6: HCFC Blend A extinguishant
— Part 8: HFC 125 extinguishant
— Part 9: HFC 227ea extinguishant
— Part 10: HFC 23 extinguishant
— Part 11: HFC 236fa extinguishant
— Part 12: IG-01 extinguishant
— Part 13: IG-100 extinguishant
— Part 14: IG-55 extinguishant
— Part 15: IG-541 extinguishant
Parts 3, 4, and 7, which dealt with FC-2-1-8, FC-3-1-10, and HCFC 124 extinguishants, respectively, have
been withdrawn, as these types are no longer manufactured.
iv © ISO 2015 – All rights reserved

INTERNATIONAL STANDARD ISO 14520-12:2015(E)
Gaseous fire-extinguishing systems — Physical properties
and system design —
Part 12:
IG-01 extinguishant
1 Scope
This part of ISO 14520 contains specific requirements for gaseous fire-extinguishing systems, with
respect to the IG-01 extinguishant. It includes details of physical properties, specification, usage, and
safety aspects.
This part of ISO 14520 covers systems operating at nominal pressures of 160 bar, 200 bar, and 300 bar
at 15 °C. This does not preclude the use of other systems, although design data for other pressures are
not available at this time.
2 Normative reference
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 14520-1:2006, 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.
4 Characteristics and uses
4.1 General
Extinguishant IG-01 shall comply with the specification shown in Table 1.
IG-01 is a colourless, odourless, electrically non-conductive gas at ambient (20 °C) temperatures, with a
density approximately 1,4 times that of air.
The physical properties are shown in Table 2.
IG-01 extinguishes fires mainly by a reduction of the oxygen concentration in the atmosphere of the
hazard enclosure.
Table 1 — Specification for IG-01
Property Requirement
Purity 99,9 % by volume, min.
−6
Moisture 50 × 10 by mass, max.
Suspended matter or sediment None visible
Table 2 — Physical properties of IG-01
Property Units Value
Molecular mass — 39,9
Boiling point at 1,013 bar (absolute) °C –185,9
Freezing point °C –189,4
Critical temperature °C –122,3
Critical pressure bar abs 49,0
Critical volume cm /mol —
Critical density kg/m 536
Vapour pressure 20 °C bar abs —
Liquid density 20 °C kg/m —
Saturated vapour density 20 °C kg/m —
Specific volume of superheated vapour at m /kg 0,602
1,013 bar and 20 °C
Chemical formula Ar
Chemical nam
...