ISO 4589-4:2021
International Standard
Current Edition
·
Approved on
06 April 2021
Plastics — Determination of burning behaviour by oxygen index — Part 4: High gas velocity test
ISO 4589-4:2021 Files
English
29 Pages
Current Edition
70.84 OMR
ISO 4589-4:2021 Scope
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.
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