标准摘要
[中文适用范围]： 本文件规定了一种测试方法，用于确定在环境温度下与氮气混合的氧气的最小体积分数，该方法支持在高于 ISO 4589-2 中规定的指定气体速度下燃烧小型垂直片状试样。 注：结果以高气速氧指数 (HOI) 表示。 此外，该文件还规定了用于确定HOI的测试装置。 该测试方法适用于厚度不超过2毫米的片状材料。 它还适用于由指定样品架垂直支撑的柔性片材。 [外文原描述]： 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.
英文名称Plastics — Determination of burning behaviour by oxygen index — Part 4: High gas velocity test