Abstract: Currently, the standards related to liquefied natural gas storage tanks include Code for fire protection design of petroleum and natural gas engineering (GB 50183-2004) and Standard for design of natural gas liquefaction plant (GB 51261-2019). This paper adopts the internationally recognized DNV PHAST fire calculation model to calculate and analyze the fire separation distance of a liquefied natural gas storage station. In terms of station safety and social-economy, the paper explores the fire separation distance of liquefied natural gas storage station suitable for the local environment so as to reduce the risk to the surrounding buildings and provide the basis for the safe production in enterprises.

Key words: LNG storage tank, leakage diffusion, fire separation distance, thermal radiation influence distance, diffusion exclusion zone boundaries