Abstract: It is very important to consider the impact of potential fire accidents of flammable liquid facilities on railway lines when selecting railway lines. Such accidents not only endanger personnel and equipment but may also cause severe damage to neighboring railway infrastructure. To determine appropriate fire separation distances and assess thermal radiation effects on railway facilities, this study employs consequence analysis methodology. First, potential fire scenarios in flammable liquid facilities were analyzed. Combined with, thermal radiation safety thresholds for railway facilities and regulations on fire separation disfance, an extreme accident consequence model was developed, incorporating three typical flammable liquids. PHAST software simulations were conducted to calculate fire separation distances under two rupture modes. The results demonstrate that thermal radiation impact range primarily correlates with liquid pool area and fuel combustion heat. Fire containment dike dimensions can be utilized to determine corresponding safety distances, enabling the development of a rapid calculation model for fire separation distances.

Key words: railway, flammable liquid, fire separation distance, consequence analysis, fire