We are working on a storage tank for an organic product whose boiling point is 230ºC at atmosphere.
The tank is designed at 7 barg. When we calculate the safety valve (fire case), some issues pop up.
Estimating the reliving condition shows us that 7 barg is close to its critical point.
Further researches show product will start decomposing to different components when temperature is higher than around 190ºC.
How can we calculate the safety valve for the fire case?
Or how can we make the fire case not creditable?