UNE-EN ISO 4589-3:2017
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The latest, up-to-date edition.
Plastics - Determination of burning behaviour by oxygen index - Part 3: Elevated-temperature test (ISO 4589-3:2017)
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Spanish, Castilian, English
04-10-2017
This part of ISO 4589 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 may 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
supporting frame as defined in Table 2 of Part 2. These methods are suitable for solid, laminated or cellular
materials characterized by an apparent density 100 kg/m3 or greater. The methods may also be 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 part of ISO 4589 also includes a method (see Annex A) for determining the temperature at which the
oxygen index 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 oxygen
index of < 20,9 %.
Results obtained in accordance with this part of ISO 4589 is not applicable to describe or appraise the fire
hazard presented by a particular material or shape under actual fire conditions, unless used as one element of
a fire risk assessment which takes into account all of the factors which are pertinent to the assessment of the
fire hazard of a particular application for the material.
NOTE 1 It may 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 of ISO 3582:2000, Flexible cellular polymeric materials çø Laboratory assessment of horizontal burning
characteristics of small specimens subjected to a small flame.
| Committee |
CTN 53/SC 6
|
| DocumentType |
Standard
|
| Pages |
29
|
| PublisherName |
Asociación Española de Normalización
|
| Status |
Current
|
| Standards | Relationship |
| EN ISO 4589-3:2017 | Identical |
| BS EN ISO 4589-3:2017 | Identical |
| I.S. EN ISO 4589-3:2017 | Identical |
| NBN EN ISO 4589-3 : 1996 | Identical |
| ISO 4589-3:2017 | Identical |
| NEN EN ISO 4589-3 : 2017 | Identical |
| NF EN ISO 4589-3 : 2017 | Identical |
| NS EN ISO 4589-3 : 2017 | Identical |
| DIN EN ISO 4589-3:2016-03 (Draft) | Identical |
| ISO 3582:2000 | Flexible cellular polymeric materials — Laboratory assessment of horizontal burning characteristics of small specimens subjected to a small flame |
| ISO 13943:2017 | Fire safety — Vocabulary |
| ISO 4589-2:2017 | Plastics — Determination of burning behaviour by oxygen index — Part 2: Ambient-temperature test |
| ISO 4589-1:2017 | Plastics — Determination of burning behaviour by oxygen index — Part 1: General requirements |
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