GSO ISO 4589-4:2023
ISO 4589-4:2021
Gulf Standard
Current Edition
·
Approved on
03 May 2023
Plastics — Determination of Burning Behaviour by Oxygen Index — Part 4: High Gas Velocity Test
GSO ISO 4589-4:2023 Files
English
29 Pages
Current Edition
Reference Language
71.97 OMR
GSO ISO 4589-4:2023 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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