Due to the high number of cases in which fire accidents were initiated from pipe insulation materials installed in small compartments, flame-retardant products should be used in building construction. Typically, standardised rectangular type specimens are used to evaluate the reaction-to-fire performance of pipe insulation without considering the actual installation conditions. In this study, polyethylene (PE) foam pipe insulation materials were tested, taking construction methods into account, according to the NFPA 274 standard. The experimental results showed that the fire growth rate varied from ultrafast to slow, depending on the installation conditions, and that the time to reach the peak heat release rate varied significantly. In particular, the addition of a galvanised steel casing lowered the fire risk even if the same PE foam material was used. Therefore, to improve fire safety in small compartments, such as concealed or interstitial spaces that do not have active fire protection systems, using galvanised steel casings is an alternative method for building construction.

由于安装在小隔间中的管道绝热材料引发火灾的可能性很高，因此在建筑施工中应使用阻燃产品。通常，在不考虑实际安装条件的情况下，使用标准化的矩形样本来评估管道绝缘的起火反应性能。在这项研究中，根据NFPA 274标准，考虑了施工方法，对聚乙烯（PE）泡沫管保温材料进行了测试。实验结果表明，火势的增长速度从超快到慢速不等，具体取决于安装条件，达到峰值放热率的时间也有很大差异。尤其是，即使使用相同的PE泡沫材料，增加镀锌钢外壳也可以降低火灾风险。因此，为了提高小隔间的防火安全性，例如没有主动防火系统的隐蔽或间隙空间，使用镀锌钢制外壳是建筑结构的替代方法。