Engineering Catalog
Featured Architectural Entry & Partition Door Assemblies
Engineered to comply with stringent fire barrier, hurricane resistance, and moisture protection thresholds for commercial complexes, high-end hospitality, and private estates.
25+
Years Engineering R&D
180,000m²
Smart Production Base
600+
Skilled Fabricators
100+
Patents & Global Certs
Enterprise Authority
Guangdong Dejiyoupin: Precision Metallurgy & Structural Integrity
Headquartered in Foshan—China’s epicenter of architectural aluminum—DERCHI sets the industry benchmark for commercial fire dampening, non-combustible core infiltration, and high-frequency cyclical durability.
In modern architectural design, internal fire barriers are no longer restricted to heavy, opaque steel doors that compromise interior aesthetics. As a world-leading China wholesale aluminium internal fire doors manufacturer & exporter, Guangdong Dejiyoupin Doors and Windows Co., Ltd. (DERCHI) leverages advanced multi-cavity aluminum extrusion profiles embedded with specialized non-combustible intumescent materials. Under standard atmospheric conditions, these systems provide panoramic clarity, minimalist sightlines, and effortless mechanical movement. When exposed to flash fires exceeding 1,000°C, the engineered fire core compounds expand rapidly, creating an impermeable thermal and hermetic smoke-containment seal that halts toxic gases and radiative heat flux according to EN 1634-1, UL 10C, and BS 476 protocols.
180,000 m² Mega Industrial Park
DERCHI's intelligent manufacturing cluster utilizes fully automated German CNC cutting centers, computerized composite insertion lines, and automated packaging hubs. With over 600 full-time technical personnel, we maintain complete end-to-end quality jurisdiction—eliminating third-party sub-contracting variances.
8 International Certifications & 30+ Patents
Our engineered internal door assemblies carry certified compliance under CE, ISO 9001, AS 2047, and UL requirements. With more than 30 registered technological and appearance patents, DERCHI supplies fully documented performance reports required by forensic fire safety marshals globally.
100% Free Bespoke CAD & BIM Detailing
Bridging architectural vision with workshop fabrication, our dedicated technical engineering department turns tender schedules and rough site openings into millimeter-perfect, clash-detected CAD shop drawings and Revit BIM parametric models within 24–48 hours at zero cost to our distribution partners.
| Performance Criterion | Commercial Grade Class EI30 | Institutional Grade Class EI60 | High-Risk Infrastructure Class EI90/120 |
|---|---|---|---|
| Integrity (E) & Insulation (I) | 30 Minutes Active Fire Block | 60 Minutes Active Fire Block | 90 to 120 Minutes Thermal Isolation |
| Extruded Alloy Profile | 6063-T6 Architectural Grade (2.0mm) | 6060-T6 High-Strength Alloy (2.5mm) | Reinforced 6061-T6 Thermal Core (3.0mm) |
| Glazing Assembly | 17mm Pyrostop Multi-layer Intumescent | 25mm Gel-Filled Nano-Silica Compound | 35mm Ceramic Fire-Resistant Insulated Unit |
| Acoustic Attenuation (STC) | 34 dB Reduction | 39 dB Sound Transmission Class | 44+ dB Maximum Acoustic Isolation |
| Air Permeability / Smoke Draft | Class 4 (EN 12207) Sealed Gasket | Sa / S200 Smoke Control (EN 1634-3) | Hermetic Drop-Down Auto Sill Seal |
Procurement Intelligence
Future Procurement Trends for Internal Aluminium Fire Doors
Key macro shifts steering institutional specifications, hospitality tenders, and large-scale residential multi-unit construction projects through 2026–2030.
Flush Vision & Ultra-Slim Profiles
Heavy, visionless solid doors are being superseded by minimalist aluminum profiles holding optical fire-resistant glass. Architects now specify unobstructed daylight and sightlines without compromising fire compartmentalization.
Low Carbon Footprint & Circularity
Global procurement criteria mandate certified low-carbon recycled aluminium billets (hydro-powered smelting). DERCHI products integrate circular metallurgy that reduces embodied carbon while fulfilling green-building credits like LEED v4 and BREEAM.
Smart Building BMS & Access Control
Modern fire doors must interface with complex Building Management Systems. Current procurement demands electromagnetic hold-open loops that release instantly upon smoke sensor alerts, combined with smart multi-biometric fail-safe latching.
Direct Factory Sourcing (FOB/CIF)
Developers are bypassing intermediaries. Direct collaboration with experienced Chinese manufacturers ensures full drawing transparency, precise project schedules, and substantial reductions in total procurement costs.
Technological Trajectory
Next-Generation Engineering & Material Innovations
Addressing the critical engineering paradox: maximizing slim aesthetics, reducing frame mass, and boosting thermal resistance.
Ceramic Polymer Thermal Cavity Infills
Traditional polyamide breaks melt at elevated temperatures. DERCHI’s research focuses on hybrid ceramicized silicone barriers that solidify into an impenetrable heat barrier under high temperatures, delaying critical heat transfer across profile profiles.
Multi-Functional Performance Integration
Modern applications demand doors that perform across several metrics simultaneously. DERCHI fire doors integrate acoustic decibel baffling (Rw 42dB), class-4 smoke tightness, anti-panic egress levers, and bullet/burglary deterrence in a cohesive package.
Advanced Non-Toxic Sublimated Finishes
Internal door hardware must withstand strict volatile organic compound (VOC) tests. Our fluorocarbon coatings and 3D architectural woodgrain sublimation finishes maintain high scratch resistance while producing zero toxic off-gassing during high heat incidents.
Procurement FAQ
Frequently Asked Technical Questions
Detailed answers to help structural engineers, building contractors, and commercial developers specify and import directly from China.
What are the differences between Class E, EW, and EI fire door ratings? +
Class E (Integrity) guarantees that the door assembly will stop flames, hot gases, and smoke from penetrating to the unexposed face, but does not limit heat transmission. Class EW (Radiation) adds radiant heat limitation, ensuring radiant flux remains below 15 kW/m² on the safe side. Class EI (Integrity & Thermal Insulation) is the most stringent classification: it maintains structural integrity while restricting the average temperature rise on the protected face to less than 140°C above ambient levels, shielding escaping occupants and preventing combustible materials in escape hallways from spontaneous ignition.
Can an internal aluminium fire door incorporate transparent glass panels? +
Yes. DERCHI manufactures fully glazed internal fire doors utilizing multi-laminated intumescent gel glass or specialized potassium-silicate clear interlayers. In normal day-to-day use, these glass panes maintain over 86% luminous optical clarity. When exposed to fire, the internal interlayers foam up to create a solid, opaque heat shield, delivering complete EI30, EI60, or EI90 fire isolation while satisfying architectural goals for natural light.
What specific details are required to receive a firm FOB or CIF quote? +
To provide an accurate and unalterable production quotation, we request: (1) Schedule of structural wall opening dimensions (width x height x jamb depth); (2) Required fire duration rating (EI30, EI60, EI90); (3) Configuration (single leaf, unequal pair, double leaf, with or without fixed over-transom/sidelights); (4) Surface finishing specification (powder coat RAL number, anodized micron thickness, or architectural wood-grain); and (5) Hardware specifications (panic hardware, concealed door closers, access control interface). Project drawings in DWG or PDF format are welcomed.
How does DERCHI ensure cargo protection during international sea transport? +
Every door frame and leaf undergoes an exhaustive 4-layer packaging process: first, a low-tack protective adhesive PE film prevents surface abrasions; second, heavy-duty molded EPE foam caps protect edges and miter joints; third, corrugated cellular cardboard encases the unit; and fourth, products are loaded into custom fumigated plywood structural crates or steel skeleton pallets built for direct forklift access, preventing racking or shifting during maritime transport.
Are DERCHI internal fire doors compatible with regional building codes (e.g., US, UK, Middle East)? +
Yes. Over our 25-year manufacturing history, DERCHI assemblies have been engineered and tested against worldwide benchmark standards including UL 10B/10C (North America), BS EN 1634-1/3 (United Kingdom & European Union), AS 1530.4 (Australia/New Zealand), and Gulf Building Code requirements throughout the Middle East. Comprehensive test reports and factory-affixed compliance labels are supplied for every certified production run.
Connect Directly with Our Lead Fenestration Engineers
Send us your door schedules, project elevation drawings, or bill of quantities. Our Foshan engineering team will prepare structural CAD shop drawings and factory-direct pricing within 24 hours.
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