Explosion-proof panels can be categorized into the following types based on their material:
Fiber cement board explosion-proof panels: These panels are made from Portland cement, incorporating natural fibers (such as wood fiber) and minerals (such as silica sand). They are manufactured through processes such as pulping, molding, and autoclaving. These panels offer high strength and excellent fire resistance (with a fire resistance limit of over 4 hours) and can withstand explosion pressures of 0.1-0.3 MPa. Their density typically ranges from 1.6-2.0 g/cm³, meeting the GB/T 9772-2009 "Fiber Cement Flat Panel" standard. They are widely used in high-risk locations such as nuclear power plants and chemical plants.
Vermiculite board explosion-proof panels: The core material is expanded vermiculite (chemical composition: Mg, Fe, Al)₃(Al, Si)₄O₁₀₂·4H₂O), which is expanded at high temperatures (800-1000°C) and then pressed with an inorganic binder. Its thermal conductivity is as low as 0.065-0.09 W/(m·K). When exposed to fire, it releases crystalline water, providing active fire protection. Its porous structure also absorbs shock wave energy. Common thicknesses range from 15-30 mm, meeting EN 13501-1 Class A1 fire protection standards, making it particularly suitable for locations requiring thermal insulation and explosion protection, such as oil tank areas.
Metal explosion-proof panels include:
Steel panels: Mostly made of Q235B or Q345R carbon steel, with a thickness of 6-20mm. Layers of stainless steel (such as 304/316L) are bonded via explosive welding to enhance corrosion resistance. Yield strength ≥ 235MPa.
Aluminum alloy panels: Commonly made of 5052 or 6061-T6 alloys, they have a density of 2.7g/cm³ and a tensile strength ≥ 275MPa. Their honeycomb sandwich structure allows them to achieve an explosion energy absorption rating of 1.5-2.5kJ/m².
This type of panel must be certified according to GB 50779-2012, "Petrochemical Control Room Explosion-Proof Design Code." They are commonly used in extreme environments such as military facilities and LNG storage tanks.
