由于市场的多元化，产品的防火性能是人们比较关注的方面。橡胶作为轨道机车常用的弹性材料需要通过ASTM C1166火焰蔓延测试，根据火焰蔓延FP指数来评估。

　　ASTM C1166: Standard test method for flame propagation of dense and cellular elastomeric gaskets and accessories.

    ASTM C1166:密致及多孔弹性体衬垫和附件火焰蔓延的试验方法。

　　橡胶产品ASTM C1166测试方法Calculate the average flame propagation (FP) for R1through R6 according to the following equation:FP= ([R1o-R1 f]+ [R2o-R2f] +[R3o-R3f]+ [R4o-R4f] +[R5o-R5f] +[R6o-R6f]) / 6Where:R1o=original R1R1 f= final R1R2o=original R2R2 f= final R2

　　NFPA130测试数据要求此测试方法被引用于NFPA130弹性体衬垫和附件的防火性能测试部分。Average flame propagation shall be less than 101.6mm (4 in), and no specimen shall be completely consumed. 平均火焰传播距离不超过101.6mm(4英寸)，且无片样品全部燃烧完，即P≤4 inches。