Abstract: There are many types of dangerous chemicals，which are flammable. It is difficult to extinguish once the fire starts. The characteristics of hazardous chemical fire accidents were introduced. Flammable gases，flammable liquids，flammable solids and oxidizing substances have different flammable and explosive characteristics. These substances belong to the scope of the supervision and administration of the fire department. Fire hazard parameter test standards and characteristics of different explosive limit test standards were introduced. The fire hazard parameter test standards of flammable liquids were introduced. The scope of different flash point test standard was described. The fire hazard classification standards of flammable solids and oxidizing substances were introduced. Perspective research and standard development were also discussed.

Key words: dangerous chemicals, fire hazard, grading standard

摘要： 危险化学品种类繁多，容易发生火灾，且一旦发生火灾难于扑救。介绍了危险化学品火灾事故的特点。危险品中的易燃气体、易燃液体、易燃固体、氧化类物质具有易燃易爆特点，属于消防监督管理的范围。介绍了易燃气体的火灾危险性参数测试标准及不同爆炸极限测试标准的特点。介绍了可燃液体的火灾危险性参数测试标准，概述了不同闪点测试标准的适用范围。概述了可燃固体、氧化类物质的火灾危险性分级标准。展望了易燃易爆危险品需开展的研究及标准的制定。

关键词: 危险化学品, 火灾危险性, 分级标准