Abstract: The gasoline torch was used to ignite the ordinary and flame- retardant EPS external insulation material under different distances. The results showed that the two types of EPS could be ignited when they directly contacted to the gasoline torch flame.The surface of EPS only got different degrees of shrinkage and melting when there was a distance between the EPS and the gasoline torch flame, and the material was not ignited. The further the distance was, the smaller the shrinkage range was and the less the melting degree was.

Key words: EPS, gasoline torch, ignition condition