As a leading China manufacturer and factory, Mingjue specializes in delivering the Heavy-duty Insulated Steel Fireproof Door for Industrial Plant designed to meet strict industrial fire safety standards. Built for heavy-duty environments, this solution integrates fire resistance, thermal insulation, and structural durability, making it an essential component of modern industrial fire protection systems.


The Heavy-duty Insulated Steel Fireproof Door for Industrial Plant is a specialized fire-rated barrier used in industrial buildings to:
● Prevent fire spread across zones
● Block heat transfer and smoke diffusion
● Ensure safe evacuation time during emergencies
● Protects personnel and equipment
Supports compliance with fire safety regulations
Maintains operational safety in high-risk environments
● Multi-layer structure with high-density rock wool core
● Fire rating options: 1.0 to 3.0 hours
● Effectively reduces heat transmission during fire incidents
● Constructed with 1.5–2.5mm cold-rolled steel
● Reinforced frame with channel steel design
● Resistant to impact, deformation, and industrial wear
● Corrosion-resistant coatings (powder or phosphating)
● Suitable for high temperature, humidity, and dust
● Service life exceeding 20 years
● Available in single, double, and unequal leaf designs
● Opening options: swing or sliding
● Custom sizes, vision panels, and access control integration
The following represent standard technical parameters of Heavy-duty Insulated Steel Fireproof Door for Industrial Plant; they can be customized and adjusted for bulk orders to meet the specific requirements of industrial facility projects. All parameters have undergone third-party testing and comply with relevant national standards and fire safety regulations:
| Parameter Name | Standard Specifications | Customization Options | Applicable Standards |
| Fire Rating | Grade A (1.5 hours), Grade B (1.0 hour) | Grade A (2.0–3.0 Hours) | GB 12955-2008 |
| Door Body Material | 1.5mm Cold-Rolled Steel Plate (Door frame reinforced with channel steel) | 1.2–2.5mm Cold-Rolled Steel / Stainless Steel | GB 17565-2022 |
| Core Filling Material | High-Density Fireproof Thermal Insulation Rock Wool (120 kg/m³) | Fire-Resistant Thermal Insulation (Rock Wool / Perlite) | GB/T 11835-2016 |
| Door Body Thickness | 80mm | 60–120mm | Fire Safety Codes + Facility Requirements |
| Opening Method | Swing Type (Single Leaf / Double Leaf) | Sliding / Double-Leaf (Active/Passive) | GB 17565-2022 |
| Standard Dimensions | 1200 × 2100 mm, 1500 × 2100 mm | 1000×2000mm – 2500×2400mm | Standard Door Opening Dimensions for Industrial Facilities |
| Surface Treatment | Electrostatic Spray Coating (Gray, Blue) | Acid Pickling & Phosphating / Fluorocarbon Spray Coating / Custom Colors | GB/T 18593-2018 |
| Hardware accessories | Heavy-Duty Fire-Rated Hinges, Fire-Rated Lock | Heavy-Duty Load-Bearing Hinges / Explosion-Proof Fire-Rated Locks / Access Control Compatibility | GA/T 73-2015 |
The Heavy-duty Insulated Steel Fireproof Door for Industrial Plant is widely used in:
● Metallurgical plants
● Machinery manufacturing workshops
● Power generation facilities
● Warehouses and storage zones
● Equipment rooms and evacuation corridors
1. Jinan Metallurgical Plant Project: Supplied the facility with over 300 heavy-duty, thermally insulated steel fire doors. These units feature 2.0mm cold-rolled steel plates, hold a Class A fire rating, and boast an 80mm door leaf thickness—specifically designed to withstand the plant's high-temperature operating environment. The doors were delivered efficiently and in bulk, successfully passed fire safety inspections, and received unanimous approval from the plant's management.
2. Qingdao Machinery Plant Project: Provided custom-manufactured Class B heavy-duty, thermally insulated steel fire doors. Constructed from 1.5mm cold-rolled steel plates with an electrostatic spray finish, these doors are tailored for fire compartmentalization within workshops and for securing equipment rooms. They effectively balance the requirements for fire and thermal insulation with the need for heavy-duty structural integrity. The doors were installed in batches that aligned perfectly with the construction schedule, resulting in zero quality-related complaints.
3. Yantai Building Materials Plant Project: Based on project specifications, a bulk order of custom, double-leaf, heavy-duty swing fire doors was supplied. These doors feature extra-thick 2.5mm steel plates and door frames reinforced with channel steel, making them ideal for facilitating the movement of large-scale machinery in and out of the facility. Highly durable and built to withstand rigorous use, they effectively contribute to reducing the plant's long-term maintenance and operational costs.