ISO 14520-5:2024 PDF

Name: ISO 14520-5:2024 — Gaseous fire-extinguishing systems — Physical properties and system design — Part 5: FK-5-1-12 extinguishant
SKU: ISO 14520-5:2024
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Gaseous fire-extinguishing systems — Physical properties and system design — Part 5: FK-5-1-12 extinguishant

Название (английский):

ISO 14520-5:2024

Gaseous fire-extinguishing systems — Physical properties and system design — Part 5: FK-5-1-12 extinguishant

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 11
Дата публикации:: 8 января 2024 г.
Издание:: ISO IS 14520 edition 4 version 1
ICS:: 13.220.10

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Описание (английский):

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[1] with nitrogen propellant. This does not preclude the use of other systems. [1] 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2.

Abstract

Похожие стандарты

Упомянутые в описании и другие стандарты ISO

Overview

ISO 14520-5:2024 - Gaseous fire‑extinguishing systems - Physical properties and system design - Part 5: FK‑5‑1‑12 extinguishant specifies physical, safety and system‑design requirements for using FK‑5‑1‑12 (dodecafluoro‑2‑methylpentan‑3‑one) in gaseous fire‑extinguishing systems. The fourth edition (2024) updates specifications (including dimer limits) and is applicable to total‑flooding systems operating at nominal container pressures of 25, 34.5, 42 and 50 bar using nitrogen propellant. It complements the general requirements in ISO 14520‑1.

Key topics and technical requirements

Extinguishant specifications: minimum purity 99.0% mol/mol; limits on acidity, water, non‑volatile residue, visible sediment and dimer content.

Physical properties: molecular mass (316.04), boiling/freezing points, critical temperature/pressure/density, liquid density and vapour data - used for storage, piping and discharge calculations.

Design concentrations and mass‑per‑volume tables: published m/V values across temperatures (‑20 °C to 100 °C) and concentrations (3–10% by volume), plus reference extinguishing and minimum design concentrations for specific fuels (e.g., n‑heptane extinguishment 4.5% - design 5.9%).

Fuel‑specific guidance: extinguishment/design concentrations for Class B and Class A fuels (heptane, wood crib, PMMA, PP, ABS), other fuels (acetone, ethanol, methanol, diesel) and inerting concentrations (e.g., methane inerting 8.8% - design 9.7%).

System design factors: container fill density limits, superpressurization, extinguishant quantity calculations (m = c·V / [(100 − c)·S]), and alternate fill/superpressurization options.

Safety and toxicology: personnel safety considerations (hazards from the agent, combustion and breakdown products). Toxicological values: 4 h LC50 >10% (rats), NOAEL 10%, LOAEL >10%.

Environmental properties: dedicated section addressing environmental aspects of FK‑5‑1‑12.

Practical applications

Design and specification of total‑flooding gaseous suppression systems for sensitive enclosures where water or powder is unsuitable, such as:

data centres and server rooms
telecommunications equipment rooms
museums, archives and cleanrooms
engine rooms and control centres

Use for both extinguishment and inerting applications where precise concentration control is required.

Related standards

ISO 14520‑1: General requirements for gaseous fire‑extinguishing systems

Other parts of the ISO 14520 series addressing different extinguishants and test methods

Keywords: ISO 14520‑5:2024, FK‑5‑1‑12, gaseous fire‑extinguishing systems, system design, physical properties, fill density, design concentration, total flooding, nitrogen propellant.

ISO 14520-5:2024 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Practical applications

Who should use this standard

Related standards

Технические детали

BS ISO 14520-11:2005

Gaseous fire-extinguishing systems. Physical properties and system design. HFC 236fa extinguishant.

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