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ISO 4589-4:2021

Plastics — Determination of burning behaviour by oxygen index — Part 4: High gas velocity test

SKU: iso_075215_175837 Published by ISO Publication Year 2021 1 Edition 29 pages

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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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GST REG No R119441681
QST REG No R1006017360

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ISO 4589-4:2021

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