Hebei Hong'an Fire Door Co., Ltd. is one of the most reliable manufacturers and suppliers of technical analysis of steel fire-resistant doors in China. If you're going to buy durable technical analysis of steel fire-resistant doors made in China, welcome to get free sample from our factory. All customized products are with high quality and low price.
Engineering Application of Steel Fire Doors
-
English Translation
Steel Plate Thickness (GB Mandatory): Frame ≥1.5mm for Grade A, ≥1.2mm for B/C grade, U-fold integrated bending, full welding, epoxy zinc-rich primer anti-rust treatment..
-
English Translation
Sealing System: Full-length fire intumescent strips with 45° joint, expansion ratio ≥5 times; labyrinth rebate structure meets GB12955-2024 smoke leakage standard.
-
English Translation
Internal Well-Shape Grid Keel: Grid spacing ≤300mm, spot welded bent plates for high-temperature anti-deformation.
-
English Translation
Viewing Window Glass: Same grade Class A insulated composite fire glass with retardant liquid, max 15% leaf area, fireproof adhesive sealed.
Principles of Fire & Thermal Resistance
1.Structural rigidity: Thick steel plate + grid keel anti-collapse, full welding prevents core shedding.
2.Thermal barrier: Low-conductivity perlite/aluminium silicate limits back-face temperature rise.
3.Smoke barrier: Intumescent strips + labyrinth rebates block high-temperature smoke leakage.
4.Auto-closing: Closer and linkage device cuts power to shut door automatically for reliable fire separation.
Hot Tags: technical analysis of steel fire-resistant doors, China technical analysis of steel fire-resistant doors manufacturers, suppliers, factory, fire door, Fire Rated Entrance Door, Internal Glazed Fire Doors, Metal Fire Doors, Normally Closed Fire Door, Steel Wood Fire Door
