ISO 14520-15-2015 PDF

Full title and description

ISO 14520-15:2015 — Gaseous fire‑extinguishing systems — Physical properties and system design — Part 15: IG‑541 extinguishant. This part of ISO 14520 gives specific requirements, physical property data, fill/pressure information and guidance for the design and safe use of total‑flooding gaseous fire‑extinguishing systems that use the IG‑541 inert gas mixture.

Abstract

ISO 14520‑15:2015 contains requirements and reference data for systems charged with the IG‑541 extinguishant (an inert gas mixture of nitrogen, argon and carbon dioxide). It includes physical and thermodynamic properties, specification and purity limits, recommended design concentrations for typical fuels, nominal fill pressures (150 bar, 200 bar and 300 bar at 15 °C) and safety guidance for occupiable and unoccupiable areas.

General information

• Status: Published (current edition confirmed in ISO systematic review).
• Publication date: February 2015 (Edition 3, published 13 Feb 2015).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 13.220.10 (Equipment for fire protection and fire fighting — gaseous media systems).
• Edition / version: Edition 3 (2015).
• Number of pages: 8 (third edition PDF/paper format as published by ISO).

All items above are taken from the ISO bibliographic record for ISO 14520‑15:2015.

Scope

This part of ISO 14520 specifies the physical properties, agent specification (composition and purity), storage/fill pressure data and the system‑design information necessary to size and apply IG‑541 total‑flooding systems. It addresses systems filled at nominal pressures of 150 bar, 200 bar and 300 bar (values given at 15 °C) and provides the design concentrations and quantities for extinguishment and inerting applications, plus safety guidance for personnel exposure and system operation.

Key topics and requirements

• Definition and nominal composition of IG‑541 (nominally ~52% nitrogen, ~40% argon, ~8% carbon dioxide) and acceptable component ranges and purity/moisture/oxygen limits for the mixture.
• Physical and thermodynamic properties (molecular mass, densities, vapour/pressure data and values used for container and discharge calculations).
• Nominal fill pressures and container working limits for systems designed at 150 bar, 200 bar and 300 bar (specified at 15 °C) and associated storage/temperature notes.
• Design concentrations and flooding factors for typical fuels (tables for Class A, B and C fuels and example design concentrations for fuels such as n‑heptane are provided or referenced).
• Safety of personnel: physiological guidance and exposure thresholds used in design (NOAEL/LOAEL guidance and oxygen‑depletion hazard considerations) and recommendations for occupiable vs unoccupiable spaces.
• Quality, filling and verification requirements (agent specification, certificates of conformity and periodic verification/refill practices).

Technical details and numerical tables referenced above are drawn from the ISO document and consolidated technical summaries for IG‑541.

Typical use and users

Intended users include fire‑protection designers and engineers, system manufacturers and installers, approving authorities and facility owners/operators who specify or install total‑flooding gaseous suppression for data centres, control rooms, archives, museums, marine spaces, telecommunication hubs and other spaces where a clean, electrically non‑conductive extinguishant is required. The standard supports system design, specification, acceptance testing and safety planning.

Related standards

ISO 14520‑15 is one part of the ISO 14520 series (Gaseous fire‑extinguishing systems — Physical properties and system design). Other parts in the series cover general requirements (Part 1) and a range of other extinguishants (e.g., IG‑01, IG‑100, IG‑55, Halocarbon and halogenated agents). ISO 14520 parts are developed by ISO/TC 21/SC 8 and are commonly used alongside national and industry installation standards (for example NFPA 2001 and EN standards) when designing and approving systems.

Keywords

IG‑541, Inergen, inert gas, gaseous fire‑extinguishing systems, total‑flooding, agent specification, system design, fill pressure, oxygen depletion, NOAEL, LOAEL, ISO 14520.

FAQ

Q: What is this standard?

A: ISO 14520‑15:2015 is the ISO technical specification that provides physical property data, agent specification and system‑design guidance specifically for IG‑541 gaseous fire‑extinguishing systems.

Q: What does it cover?

A: It covers the IG‑541 mixture definition and composition ranges, purity and contaminant limits, thermodynamic data, nominal fill pressures (150/200/300 bar at 15 °C), tables and methods for calculating required agent quantities and design concentrations for extinguishment/inerting, and safety guidance for personnel and installations.

Q: Who typically uses it?

A: Fire‑protection engineers, system manufacturers, installers, certification bodies and facility owners/operators who design, specify, install or approve IG‑541 total‑flooding systems. It is used as a technical reference when preparing specifications, calculation inputs and safety assessments.

Q: Is it current or superseded?

A: The 2015 third edition (ISO 14520‑15:2015) is published and was reviewed/confirmed in ISO’s review cycle (the ISO bibliographic record shows the 2015 edition as published and confirmed in the subsequent review). Users should check with their national standards body or the ISO bibliographic record for any amendments or later revisions before final specification.

Q: Is it part of a series?

A: Yes — ISO 14520 is a multipart series (general requirements and individual parts for different extinguishants); Part 15 addresses IG‑541 specifically. The series is published by ISO/TC 21/SC 8 and other parts cover IG‑01, IG‑100, IG‑55 and various halocarbon or fluorinated agents.

Q: What are the key keywords?

A: IG‑541, inert gas, Inergen, gaseous suppression, total‑flooding, agent composition, design concentration, fill pressure, oxygen depletion, ISO 14520.