ISO 14520-5 is specifically applicable to , meaning systems designed to discharge agent to achieve a uniform concentration throughout an enclosed space. It covers systems that operate at nominal container pressures of 25 bar, 34.5 bar, 42 bar, and 50 bar , using nitrogen as the propellant.
The standard defines the "Maximum Concentration" safe for human presence.
The standard establishes minimum concentrations based on the specific fuel type involved. iso 14520-5 pdf
If you are designing a system using HFC-227ea, here is what you will reference in the PDF document.
FK-5-1-12 (dodecafluoro-2-methylpentan-3-one) is a fluorinated ketone widely known by its commercial name, 3M™ Novec™ 1230 Fire Protection Fluid. As a "clean agent," it extinguishes fires primarily through heat absorption, leaving no residue and posing minimal risk to sensitive electronics. ISO 14520-5 is specifically applicable to , meaning
Typically 1 (roughly equivalent to CO₂).
The most recent version of this standard is , published in January 2024. The standard establishes minimum concentrations based on the
The is a critical component of the international series dedicated to gaseous fire-extinguishing systems. Specifically, ISO 14520-5:2016 addresses the physical properties and system design for systems utilizing FK-5-1-12 extinguishant .
ISO 14520-5 is part 5 of the ISO 14520 series specifying requirements for gaseous fire-extinguishing systems that use clean agents (gaseous fire extinguishing systems). Part 5 covers requirements specific to halocarbon agents (chemical agents), including design, installation, performance, testing and safety considerations. This report summarizes scope, key technical requirements, typical structure, regulatory and application context, and guidance for locating an official PDF.
HFC 227ea is one of the most popular clean agents in the world. It is a colorless, odorless, electrically non-conductive gas that extinguishes fires primarily through heat absorption (physical mechanism) without leaving a residue. It is safe for occupied spaces at the designed concentration and is ozone-friendly (zero ODP), though it has a Global Warming Potential (GWP).
