The present paper has introduced three equipments, i.e. Accelerating Rate Calorimeter (ARC), Vent Sizing Package (VSP) and Reactive System Screening Tool (RSST), useful for the study and simulation of runaway reaction. The above equipments can be made use of calculating the relief diameter and the discharged mass flow so as to obtain the expected pressure and temperature data of runaway reaction. In accordance with the DIERS classification, three reacting systems are classified for the venting size purpose,...