ISO 14520-5 provides specific guidelines for systems utilizing HCFC Blend A as the extinguishing agent. It is part of the broader ISO 14520 framework, which replaced the older ISO 14520 standard to encompass newer technologies and environmental considerations. The document covers:
: The standard outlines requirements for the design and construction of BSCs, including materials, airflow characteristics, and HEPA filtration systems. It emphasizes the need for a laminar airflow that ensures a uniform velocity across the working area. iso 14520-5 pdf
The standard provides the specific requirements and physical properties for gaseous fire extinguishing systems using FK-5-1-12 (commonly known by the brand name Novec 1230) as the extinguishant. It serves as a critical supplement to the general requirements found in ISO 14520-1. Key Technical Specifications Chemical Identity : Dodecafluoro-2-methylpentan-3-one. Environmental Profile : Ozone Depletion Potential (ODP): 0. Global Warming Potential (GWP): 1. Atmospheric Lifetime: Approximately 5 days. It emphasizes the need for a laminar airflow
Use the physical property tables to calculate the required agent mass. The formula (derived from the ideal gas law) is provided in clause 5.3. You will need the specific vapor volume (s) for HFC 227ea at 20°C, which the PDF provides as approximately 0.1372 m³/kg. and HEPA filtration systems.
: Engineers use this standard to calculate the mass of gas required for a specific volume and to ensure hardware compliance.