ISO 14520-17 pdf download – Gaseous fire-extinguishing systems – Physical properties and system design -一 Part 17: Halocarbon Blend 55.
2 NormatIve references
The following documents are referred to in the text in such a way that same 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 l452O1:, Gaseous flre’excingulshlng systems — Physical properties and system design — Part 1: General requirements
3 Terms and definitions
For the purposes of this document, the terms and delinitions given in ISO 14520-1 apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:J/www.iso.org/obp IEC Electropedla: available at https:/Jwww.electropedia.ore/
4 Chancteristics and uses
4.1 General
Extinguishant 1-lalocarbon Blend 55 shall comply with the specifications shown in Table 1.
Halocarbon Blend 55 blend of SOt 3% HFO-1 233zd(E) and 50 ± 3% FK-S-1-12 (by mass)J is a colourless, almost odourless, electrically non-conductive gas, with a density approximately 6.3B times that of air.
Its physical properties are shown in Table l.
Halocarbon Blend 55 extinguishes fires mainly by physical means, but also by some chemical means.
4.2 Use o(Halocarbon Blend 55
Ilalocarbon Blend 55 total flooding systems may be used for extinguishing fires of all classes within the limits specified in ISO 1452O1:_2J. Clause 4.
The extinguishant requirements per volume of protected space arc shown in Table 3 for various levels of concentration. These are based on methods shown in ISO 14S20-1:—, 7.7.
The extinguishing concentrations and design concentrations for n-heptane and surface class A hazards are shown in Table 4. Concentrations [or other fuels are shown in Table 4.
ISO 14520-17 pdf download – Gaseous fire-extinguishing systems – Physical properties and system design -一 Part 17: Halocarbon Blend 55
