A Calculation of Volume of Explosion Hazard Zone and Explosion Pressure in Oil Storage Tanks

It is shown that for determination of tanks stability to explosion of gas-air mixtures it is important to calculate explosion pressure in dynamics (at filling or emptying of the tank) depending on level of filling. A method for determination of explosion pressure in the tanks is proposed, taking into account the dependency of the volume of hazardous area from time. It is shown that the formation of the zone of explosive concentrations is divided into three types depending on the ratio of saturated vapor concentration to the lower and upper flammability limits, and for RVS-5000 tanks the type II is characteristic. The results of calculations of explosion pressure from the time of evaporation taking into account the volume of explosion-hazardous area for a tank of 5000 m3 are presented.