ISO 14520-1-2023 PDF

Full title and description

St ISO 14520-1-2023 — Gaseous fire‑extinguishing systems — Physical properties and system design — Part 1: General requirements. This part sets out general requirements, recommendations and safety considerations for the design, installation, testing, maintenance and validation of total‑flooding gaseous fire‑extinguishing systems using electrically non‑conducting, non‑residual gaseous extinguishants.

Abstract

ISO 14520‑1:2023 specifies requirements and gives recommendations for gaseous fire‑extinguishing systems primarily intended for total flooding of buildings, plant rooms and other enclosures. It describes characteristics of suitable extinguishants and associated design, installation, testing, maintenance and safety provisions. The document excludes CO2 (covered by other standards) and is not intended for explosion suppression; it is to be used together with other parts of the ISO 14520 series that address specific extinguishants.

General information

• Status: Published / Current.
• Publication date: 3 February 2023.
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 13.220.10 (Fire‑fighting).
• Edition / version: Edition 4 (2023).
• Number of pages: 106.

Scope

This part covers total‑flooding systems that employ electrically non‑conducting gaseous extinguishants which do not leave a residue after discharge and for which sufficient data exist to validate performance and safety. It provides guidance and requirements for system design, installation, commissioning, testing, inspection, maintenance and safety arrangements. CO2 systems and explosion suppression applications are outside the scope. ISO 14520‑1:2023 is intended to be read in conjunction with other parts of the ISO 14520 series addressing specific extinguishants.

Key topics and requirements

• Definitions and classifications of gaseous extinguishants suitable for total‑flooding systems.
• Physical properties and performance characteristics that influence system design and agent selection.
• Design principles for total‑flooding systems (room integrity, distribution, nozzle/porting, piping and cylinder arrangements).
• Installation, commissioning and acceptance testing procedures.
• Operational safety measures, personnel protection, warnings and evacuation procedures during discharge.
• Inspection, maintenance and periodic testing requirements to ensure continued system reliability.
• Requirements for validation and verification of extinguishing performance and safety data (use with parts of ISO 14520 covering specific agents).
• Exclusions and interfaces (CO2 covered elsewhere; explosion suppression excluded).

Typical use and users

This standard is used by fire protection engineers, system designers, installers and commissioning agents, testing and inspection bodies, authorities having jurisdiction, product manufacturers, and facility managers to specify, design, install, commission and maintain gaseous total‑flooding extinguishing systems in buildings, data centres, plant rooms and other protected enclosures.

Related standards

ISO 14520‑1:2023 is Part 1 of the ISO 14520 series. Other parts of the series address specific extinguishants and related technical details (individual halocarbon and halocarbon‑blend agents, HFCs, FK‑5‑1‑12 / Novec‑type agents, inert gas mixtures and agent‑specific test methods). Users should consult the complete ISO 14520 series and any applicable national or regional adoption documents for agent‑specific requirements.

Keywords

gaseous fire‑extinguishing systems, clean agent, total flooding, system design, agent properties, installation, commissioning, testing, maintenance, safety, ISO 14520.

FAQ

Q: What is this standard?

A: ISO 14520‑1:2023 is the general requirements part of the ISO 14520 series for gaseous fire‑extinguishing systems, covering design, installation, testing, maintenance and safety for total‑flooding clean‑agent systems.

Q: What does it cover?

A: It covers physical properties relevant to system design, design and installation principles for total‑flooding systems, commissioning and testing procedures, maintenance and safety arrangements. It excludes CO2 systems and explosion suppression and is to be used together with agent‑specific parts of ISO 14520.

Q: Who typically uses it?

A: Fire protection engineers, system designers and manufacturers, installers and commissioning teams, testing/inspection bodies, regulators and facility managers involved with gaseous clean‑agent extinguishing systems.

Q: Is it current or superseded?

A: Current — ISO 14520‑1:2023 was published 3 February 2023 and replaces the withdrawn 2015 edition (ISO 14520‑1:2015).

Q: Is it part of a series?

A: Yes — it is Part 1 of the ISO 14520 series; other parts of the series provide agent‑specific requirements and test methods.

Q: What are the key keywords?

A: clean agent, total flooding, gaseous extinguishant, system design, installation, commissioning, testing, maintenance, safety, ISO 14520.