M00019777
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ISO FDIS 29903 2012 Edition, September 21, 2012 GUIDANCE FOR COMPARISON OF TOXIC GAS DATA BETWEEN DIFFERENT PHYSICAL FIRE MODELS AND SCALES
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Availability date: 07/14/2021
Description / Abstract:
This International Standard provides principles for
characterizing the measured production of toxic gases from a
laboratory fire test and provides bases for comparing the results
between different typesand scales of such tests. It also includes
consideration of the uncertainties in the gas determinations. The
combined uncertainty is a key factor in the ability to establish
similarity or difference of test results.
The sufficiency of the agreement between a bench-scale test and
a real-scale test depends on the precision needed in the fire
hazard or risk assessment, which is not covered by ISO
29903:2012.
This International Standard defines the relevance and
significance of toxic gas data from measurements in different fire
tests. With such a definition it is possible to provide generic
guidance on how such data can be compared between different sizes
and types of fire tests.
The combustion conditions represented by the fire test, other
specific characteristics of the test and the test specimen, the
sampling strategy of the fire effluents, and the analysis technique
for the toxic gas species are the most important factors when
defining the significance of the toxic gas data.
This International Standard is intended to serve as a tool for
the
a) definition of the relevance and significance of toxic gas
data from fire tests,
b) comparison of toxic gas data from fire tests of different
scales and characteristics, and
c) prediction of toxic gas data from a large-scale test based on
small-scale data or vice versa.
This International Standard gives general guidance regarding
comparison of toxic gas data between physical fire models of
different scales, but is principally developed for the gases listed
in ISO 13571, i.e. carbon dioxide (CO2), carbon monoxide
(CO), hydrogen halides (HCl, HBr, HF), sulfur dioxide
(SO2), hydrogen cyanide (HCN), nitrogen oxides (NO,
NO2), formaldehyde (CH2O) and acrolein
(C3H4O).
This International Standard does not cover characterization and
comparisons of the toxicity of the effluents form fire tests.