. It serves as a technical blueprint for engineers and safety professionals to ensure these systems are designed, installed, and maintained to effectively suppress fires while ensuring personnel safety. ISO - International Organization for Standardization Scope and Applicability The latest version, ISO 14520-5:2019 , focuses on systems that use nitrogen as a propellant. ISO - International Organization for Standardization Operating Pressures
: It defines the chemical properties, including its molecular mass, boiling point, and vapor pressure. iso 14520-5 pdf
This section clarifies that the standard defines the specific requirements for HFC 227ea systems. It explains which types of hazards (Class A surface, Class B, and Class C electrical fires) the agent is designed to protect. Use the physical property tables to calculate the
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. including its molecular mass
Here's a full review of the standard:
ISO 14520-5 is a part of the ISO 14520 series, which pertains to "Self-supporting double skin metal faced insulating panels - Factory made products - Specifications."