An explosion-proof door is an anti-explosion protective device typically used in the design of certain specialized buildings. What are the classification standards for explosion-proof doors?

Criteria for the four grades of explosion-proof doors:

Level I—After the explosion-proof door has effectively resisted the design-specified blast wave load, it remains undamaged and undeformed and can continue to be used afterward.

Level II—After the explosion-proof door has effectively resisted the design-specified blast wave load, it exhibits only slight deformation and can still be opened and closed afterward.

Level III—After the explosion-proof door has effectively resisted the design-specified shock wave load, it deforms but can still be opened afterward.

Level IV—After the explosion-proof door has effectively resisted the design-specified blast wave load, it undergoes severe deformation and, as a result, can no longer be reliably opened or closed.

Explosion-proof doors are constructed from specialized industrial steel plates, with meticulously engineered mechanical specifications and equipped with high-performance hardware fittings, ensuring both practicality and aesthetic appeal in use. Primarily designed to safeguard lives and property, these doors are also referred to as blast-resistant doors. In the event of an explosion, they are engineered to withstand the anticipated impact pressure and reflected forces, reliably absorbing explosive pressures within a specified range. This provides essential protection, effectively preventing injury to personnel and damage to property.