本文件规定了一种小规模实验室筛选程序，用于比较根据ISO 845测定的密度小于250 kg？m的水平定向小型多孔塑料试样在暴露于小型火焰点火源时的相对燃烧特性。 注:另一个涵盖柔性多孔塑料和多孔橡胶的国际标准是ISO 3582。 本试验方法旨在在受控实验室条件下对多孔塑料材料进行质量保证和有限产品评估，而不是评估实际火灾条件下建筑材料或家具的火灾行为。 附录A中所述的可选分类系统旨在为产品预先选择泡沫塑料材料，包括确定给出相同分类的材料参数范围（见6）。 1).

This document specifies a small-scale laboratory screening procedure for comparing the relative burning characteristics of horizontally oriented, small cellular plastic specimens having a density less than 250 kg？m^？3 determined in accordance with ISO 845, when exposed to a small-flame ignition source. NOTE Another International Standard which covers flexible cellular plastic and cellular rubber is ISO 3582^[2]. This method of test is intended for quality assurance and limited product evaluation of cellular plastic materials under controlled laboratory conditions, and is not intended to assess the fire behaviour of, for example, building materials or furnishings under actual fire conditions. The optional classification system described in Annex A is intended for the pre-selection of cellular plastic materials for products, including the determination of the ranges of material parameters that give the same classification (see 6.1).