BS ISO 14520-8 pdf download Gaseous fire-extinguishing systems — Physical properties and system design — Part 8: HFC 125 extinguishant 1 Scope This part of ISO 14520 gives specific requirements for gaseous fire-extinguishing systems, with respect to the HFC 125 extinguishant. It includes details of physical properties, specification, usage and safety aspects and is applicable to systems operating at nominal...