ISO 19703:2018
Generation and analysis of toxic gases in fire - Calculation of species yields, equivalence ratios and combustion efficiency in experimental fires

Standard No.

ISO 19703:2018

Release Date

2018

Published By

International Organization for Standardization (ISO)

Latest

ISO 19703:2018

Scope

This document provides definitions and equations for the calculation of toxic product yields and the fire conditions under which they have been derived in terms of equivalence ratio and combustion efficiency. Sample calculations for practical cases are provided. The methods are intended to be used to produce either instantaneous or averaged values for those experimental fires in which time-resolved data are available. This document is intended to provide guidance to fire researchers for — recording appropriate experimental fire data, — calculating average yields of gases and smoke in fire effluents in fire tests and fire-like combustion in reduced scale apparatus, — characterizing burning behaviour in experimental fires in terms of equivalence ratio and combustion efficiency using oxygen consumption and product generation data. This document does not provide guidance on the operating procedure of any particular piece of apparatus or interpretation of data obtained therein (e.g. toxicological significance of results).

ISO 19703:2018 Referenced Document

• ASTM E2058-13 Standard Test Methods for Measurement of Synthetic Polymer Material Flammability Using a Fire Propagation Apparatus (FPA)*， 2024-04-20 Update
• DIN 53436-1:2015 Generation of thermal decomposition products from materials for their analytic-toxicological testing - Part 1: Decomposition apparatus and determination of test temperature
• DIN 53436-2:2015 Generation of thermal decomposition products from materials for their analytic-toxicological testing - Part 2: Thermal decomposition method
• DIN 53436-3:1989 Generation of thermal decomposition products from materials in an air stream for toxicological testing; method for testing the inhalation toxicity
• ISO 13571:2012 Life-threatening components of fire - Guidelines for the estimation of time to compromised tenability in fires
• ISO 13943:2017 Fire safety — Vocabulary
• ISO 19706:2011 Guidelines for assessing the fire threat to people
• ISO 5660-1:2015 Reaction-to-fire tests - Heat release, smoke production and mass loss rate - Part 1: Heat release rate (cone calorimeter method) and smoke production rate (dynamic measurement)
• ISO/IEC GUIDE 98-3:2008 Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in measurement (GUM:1995)
• ISO/TS 19700:2016 Controlled equivalence ratio method for the determination of hazardous components of fire effluents - Steady-state tube furnace
• NFPA 287-2017 Standard Test Methods for Measurement of Flammability of Materials in Cleanrooms Using a Fire Propagation Apparatus (FPA) (Effective Date: 12/1/2016)

ISO 19703:2018 history

• 2018 ISO 19703:2018 Generation and analysis of toxic gases in fire - Calculation of species yields, equivalence ratios and combustion efficiency in experimental fires
• 2010 ISO 19703:2010 Generation and analysis of toxic gases in fire - Calculation of species yields, equivalence ratios and combustion efficiency in experimental fires
• 2005 ISO 19703:2005 Generation and analysis of toxic gases in fire - Calculation of species yields, equivalence ratios and combustion efficiency in experimental fires