Fireproof double-opening lead door is a special protective door designed for high-risk scenarios. It integrates fire prevention, radiation protection, airtight isolation and other functions. It is widely used in medical, nuclear industry, laboratory and chemical industries.
1. Structural design
Door body material: Constructed with a composite structure of high-density lead plates (customizable lead equivalent: 0.5–5mmPb) and fireproof materials including galvanized steel sheets and fireproof rock wool. The internally embedded lead layer is uniformly distributed to achieve full-angle radiation shielding without blind spots.
Door leaf type: Adopts a double-leaf opening structure with customizable door width (standard range: 1.5–3m). Supporting bidirectional opening, it allows smooth personnel evacuation and convenient passage for large-sized equipment.
Sealing system: The door frame is fitted with multi-layer fireproof expansion strips and lead rubber airtight strips. Under high-temperature conditions, the sealing materials expand automatically to fully fill gaps, effectively blocking the leakage of smoke, dust and radioactive particulate matter.
2. Functional characteristics
Fireproof performance: The fire resistance limit is 2-4 hours (in accordance with GB 12955-2008 standard), can withstand high temperatures above 800℃, and the door structure is stable and does not deform.Radiation protection: The lead layer shields ionizing radiation such as X-rays and gamma rays, and the protection level is customized according to demand (such as 2-3mmPb commonly used in hospital CT rooms).
Intelligent control: Optional electric opening and closing device, support card swiping, fingerprint or remote control, can switch to manual mode when power is off to ensure emergency passage.
Durability: The surface is sprayed with epoxy resin or coated with stainless steel, which is corrosion-resistant, acid-resistant, and adaptable to harsh environments such as humidity and high radiation, with a service life of more than 20 years.
3. Application scenarios
Medical field: hospital radiology department, PET-CT room, interventional treatment room, etc., to prevent radiation leakage.
Industrial scenarios: nuclear power plant reactors, nuclear waste treatment plants, laboratory radioactive material storage areas.
Special places: chemical fire and explosion-proof areas, high-cleanliness biological laboratories, taking into account fire prevention and closed isolation requirements.
4. Installation and certification
Installation requirements: The steel door frame must be embedded to ensure seamless welding with the wall, and it can be put into use only after passing the airtightness test.
Compliance certification: It complies with GB 50016 "Building Design Fire Protection Code" and GBZ 130-2020 Medical Radiation Protection Standard. Some export products meet NFPA (National Fire Protection Association) and ISO radiation safety certification.
5. Additional functions (optional)
Observation window: Built-in lead glass window (lead equivalent matches the door body) to facilitate safe monitoring of internal conditions.
Alarm linkage: Connected to the fire protection system or radiation monitor, it automatically locks and triggers the sound and light alarm when abnormal.
Barrier-free design: Floor track flat or suspended door leaves, convenient for pushing beds and equipment without thresholds.
Fireproof double-opening lead door balances safety protection and ease of operation through modular design and customized services, and is one of the core equipment for safety protection in high-risk environments.
