Let’s take a look at the blast resistance of explosion-proof door systems.

　　Explosion-proof door systems shall exhibit robust blast resistance, smooth and reliable operation, fire safety, and wind-pressure resistance. They must be capable of withstanding accidental impacts from external equipment in public buildings, thereby ensuring the safety of personnel, the integrity of industrial production facilities and equipment, protection against shock-wave damage, and effective containment of damage caused by the inadvertent release of explosive materials within the building.

　　Explosion-proof doors are primarily composed of a door frame, door leaf, main-axis lock, heavy-duty hinges, and electric strike locks, meeting stringent requirements for blast resistance, seismic wave resistance, fire safety reliability, and structural integrity. The door frame, door leaf control panel, and reinforcing components are fabricated from carbon structural steel plates. The door frame is made from rectangular steel sections with a thickness of 3.0 mm or greater; the door leaf control panel is crafted from hot-rolled square steel plates approximately 3.0 mm thick; and the reinforcing components are constructed from carbon steel plates ranging in thickness from 4.0 to 10.0 mm, with an electrostatic powder-coating finish. These doors are typically installed in petrochemical facilities, main buildings and ancillary structures of public buildings, as well as in various rooms and areas where such protection is required, such as shelters, substations, control rooms, and emergency escape routes.

　　Explosion-proof doors are a superior type of construction that exhibit exceptional resistance to operational pressure. During installation and use, they are typically fabricated from thick industrial-grade steel plates according to rigorously defined structural and mechanical specifications, and are equipped with high-performance hardware components. Moreover, throughout the entire construction process, these doors must comply with relevant standards to ensure their critical functionality is fully realized.

　　Design concept for explosion-proof doors: To withstand accidental or easily triggered incidents in industrial production, chemical plants, and other enterprise facilities, thereby ensuring the safety of personnel, the integrity of building spaces, and the undamaged condition of equipment and machinery, while preventing damage from blast waves.

　　Where is the explosion-proof panel of the explosion-proof door installed?

　　Explosion-resistant panel specifications and models: The explosion-resistant panel has been researched, designed, and developed, and has gained market recognition. Through rigorous testing, it is suitable for use in fortifications, doors, and suspended ceilings, and is available in a wide range of specifications.

　　The blast-resistant panel (also known as an explosion-proof panel) is constructed with a keel framework, featuring a 0.5-mm-thick hot-dip galvanized steel plate as the core layer and a reinforced cement-fiber board as the interlayer. The surface steel plate is arranged in a 20-mm grid pattern, with 5-mm-diameter circular holes; the steel plates within these holes are designed with a serrated profile. A high-pressure process bonds the three layers tightly together, and as the cement sets, the resulting composite panel integrates the functional properties of both steel and concrete to form a true blast-resistant panel.

　　What types of facilities are explosion-proof doors suitable for?

　　(1) Explosion-proof doors shall be installed in the combustion chamber, at the furnace inlet and outlet, in the boiler economizer flue, in the flue upstream of the fan, in the horizontal flue downstream of the fan, or in flue ducts with a slope exceeding 30°.

　　(2) Explosion-proof doors shall be installed in locations that do not pose a hazard to operating personnel and shall be equipped with pressure-relief ducts; flammable and explosive materials shall not be stored in the vicinity.

　　(3) Explosion-proof doors used in emergency evacuation must undergo regular manual functional tests to prevent rust and ensure proper operation. An explosion-proof door is designed to maintain fire-resistance integrity, structural soundness, and adequate pressure-sealing performance for a specified period. It is primarily installed at openings in firewalls, stairwell entrances and exits, evacuation corridors, and service shafts, among other building components. Under normal operating conditions, it facilitates the safe passage of personnel; in the event of a fire, it effectively inhibits the spread of flames and prevents the uncontrolled flow of hot smoke and combustion products, while also contributing positively to the overall air-tightness and ventilation system.