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sklademVydáno: 2021-05-10
BS ISO 4589-4:2021
Plastics. Determination of burning behaviour by oxygen index High gas velocity test
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| Označení normy: | BS ISO 4589-4:2021 |
| Počet stran: | 38 |
| Vydáno: | 2021-05-10 |
| ISBN: | 978 0 539 01268 2 |
| Status: | Standard |
DESCRIPTION
BS ISO 4589-4:2021
This standard BS ISO 4589-4:2021 Plastics. Determination of burning behaviour by oxygen index is classified in these ICS categories:
- 83.080.01 Plastics in general
- 13.220.40 Ignitability and burning behaviour of materials and products
This document specifies a test method for determining the minimum volume fraction of oxygen, in admixture with nitrogen, at ambient temperature, that supports combustion of small vertical sheet test specimen under a specified gas velocity that is higher than that specified in ISO 4589-2.
NOTE
The result is expressed as a high gas velocity oxygen index (HOI).
In addition, this document specifies the testing apparatus for determining the HOI.
The test method is applicable to materials in the form of sheets up to 2 mm thick. It is also applicable to flexible sheet materials that are supported vertically by a specified specimen holder.