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  • BSI
    BS EN ISO 4589-3:2017 Plastics. Determination of burning behaviour by oxygen index - Elevated-temperature test
    Edition: 2017
    $435.35
    / user per year

Description of BS EN ISO 4589-3:2017 2017

This document specifies methods for determining the minimum volume fraction of oxygen, in a mixture with nitrogen, that will support combustion of small vertical test specimens under specified test conditions over a range of temperatures between 25 °C and 150 °C. The range of temperatures is typically between 40 °C and 150 °C. The results are defined as temperature index values at the test temperature, which is typical of the practical temperature that a plastic material can experience in an overheated service situation.

Methods are provided for testing materials that are self-supporting at the test temperature in the form of vertical bars or sheet up to 10,5 mm thick. However, they are not applicable to form V which requires a supporting frame as defined in ISO 4589‑2:2017, Table 2. These methods are suitable for solid, laminated or cellular materials characterized by an apparent density 100 kg/m3 or higher. The methods are also applicable to some cellular materials having an apparent density of less than 100 kg/m3. A method is provided for testing flexible sheet or film materials while supported vertically.

This document also includes a method (see Annex A) for determining the temperature at which the OI of small vertical test specimens in air is 20,9 % under specified test conditions. The temperature at which this occurs is defined as the flammability temperature (FT) and the method is limited to the determination of temperatures less than 400 °C. The method is not applicable to materials having an OI of <20,9 %.

NOTE 1 It might not be possible to apply these methods satisfactorily to materials that exhibit high levels of shrinkage when heated, e.g. highly oriented thin film.

NOTE 2 For assessing the flame propagation properties of cellular materials of density <100 kg/m3, attention is drawn to the method described in ISO 3582.



Standard NumberBS EN ISO 4589-3:2017
TitlePlastics. Determination of burning behaviour by oxygen index - Elevated-temperature test
StatusConfirmed
Publication Date2017-06-08
ReplacesBS EN ISO 4589-3:1996
Identical National Standard OfEN ISO 4589-3:2017, ISO 4589-3:2017
DescriptorsTests, Temperature, Oxygen index, Polymers, Plastics
ICS13.220.40 Ignitability and burning behaviour of materials and products, 83.080.01 Plastics in general
CommitteePRI/26
ISBN978 0 580 89320 9
PublisherBSI
Pages28

The following editions for this book are also available...

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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