Risk analysis for explosion and burning of compressed natural gas (CNG) station vehicles exclusively

The adjustment of county´s energy strategy, environment protect requirement and the continuous progress of the automobile technology, more and more automobiles were designed on the CNG as their fuel and corresponding CNG stations were increasing at the same time. But the consequential accident such as the leakage of the gas and the fire disaster made the security of the CNG station became a serious problem a problem which people pay more and more attention on it. if the gas was not fired immediately it may construct the gas cloud cluster and will explode when it comes out a fire, and people in a certain distance may wounded by the shockwave also the architectures in the dangerous range will be destroyed. This paper will contribute to formulate the evacuate conditions for pedestrian after the explode accident happening and also will provide the basis for evaluating the new constructed CNG stations.