A blast-relief door is a safety device installed to mitigate the hazards posed by an explosion source. The blast-relief door system must exhibit excellent blast-resistant performance, operate flexibly and reliably, and provide fire protection and resistance to wind pressure. It is designed to withstand accidental explosions occurring in the external environment of industrial buildings, thereby safeguarding human life and preserving the integrity of equipment inside the building, protecting it from damage caused by blast shock waves or from the unintended detonation of flammable materials within the premises, and effectively preventing the propagation of blast-related hazards. A blast-relief door primarily consists of a door frame, door leaf, handwheel lock, load-bearing hinges, and a door closer, and is engineered to meet requirements for blast resistance, shock-wave resistance, operability, stability, and structural integrity.
It is primarily used in petrochemical facilities, main and auxiliary buildings in industrial complexes, various rooms within these structures, and areas with a potential for explosion, such as shelters, substations, control rooms, and passageways.