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ILNAS-EN ISO 4589-3:2017
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05/2017
Plastics - Determination of burning behaviour by oxygen index - Part 3: Elevated-temperature test (ISO 4589-3:2017)
Plastics - Determination of burning behaviour by oxygen index - Part 3: Elevated-temperature test (ISO 4589-3:2017)
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Abstract
ISO 4589-3:2017 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.
ISO 4589-3:2017 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 %.
Status
| Standard - Active |
Origin
| Technical Committee : |
| CEN/TC 249 : Plastics |
Implementation
| start of the vote on the project | 18/02/2016 | date of ratification (dor) | 20/03/2017 | |||
| end of the vote on the project | 18/05/2016 | date of anouncement (doa) | 31/08/2017 | |||
| start of the vote on the final project | 22/12/2016 | date of publication (dop) | 30/11/2017 | |||
| end of the vote on the final project | 17/02/2017 | date of withdrawal (dow) | 30/11/2017 |
|
Publication Official Journal
of the Grand-Duchy of Luxembourg |
19/06/2017 |
| Reference | Mémorial A N° 573 |
Relations
| Relations to older standards |
| ILNAS-EN ISO 4589-3:1996 |
| Relations to international standards |
| ISO 4589-3 |
| ISO 4589-3:2017 |
International Classification for Standards (ICS codes) :
| 13.220.40 : Ignitability and burning behaviour of materials and products |
| 83.080.01 : Plastics in general |
