GA 306国家标准修订方案的探讨

Discussion on revise of national standard GA 306

参考国内外现有标准,分别采用IEC标准、英国标准和GB 31247对阻燃耐火电缆进行验证试验,对电缆燃烧时的发热、产烟、完整性等指标进行定量分级,评价阻燃耐火电缆的性能,制定新的分级方法。试验结果表明:阻燃电缆中聚烯烃类电缆在产烟速率和产烟总量方面表现较好,PVC类电缆则在热释放速率、热释放总量和燃烧增长指数等指标方面表现优异。

Referenee to existing domestic and abroad standards, IEC standard, British standard and GB 31247 were used to test the flame retardant refractory cable. The quantitative classification of heating, smoke production and inlegrily of cables during combustion was carried out to evaluate the performance of flame retardarn and refractory cables, and to develop a new classification method. The experimental results showed that polyolefin cables performed better in smoke production rate and total smoke production, and PVC cables performed well in terms of heat release rate, total heat release and combustion growth index.