Blog

The maximum dimensions of a hangar flexible door depend on the manufacturer's engineering capabilities, structural constraints of the hangar, and specific operational requirements. Generally, modern flexible doors can span exceptionally large openings, with widths exceeding 60 meters (197 feet) and heights surpassing 20 meters (66 feet). Below is a detailed breakdown of common door types and their typical size limits, along with design considerations:   1. Sliding Door Maximum Dimensions:   Width: Unlimited (modular designs allow continuous expansion).   Height: Up to 30 meters (98 feet). Features:   Ideal for ultra-wide openings, such as aircraft maintenance hangars.   Utilizes heavy-duty tracks and reinforced panels to withstand wind loads and mechanical stress.   Suitable for environments requiring unobstructed access and rapid deployment.   2. Sliding Folding Door Maximum Dimensions:   Width: Up to 50 meters (164 feet). Height: Up to 16 meters (52 feet). Features:   Combines sliding and folding mechanisms to optimize space efficiency.   Perfect for hangars with lateral space constraints.    Lightweight panels reduce operational wear, enhancing durability in high-frequency usage scenarios.   3. Side Swing Door Maximum Dimensions: Width: Up to 60 meters (197 feet).   Height: Up to **15 meters (49 feet).   Features:   Operates via lateral hinges, enabling full-panel opening for oversized equipment transport.   Reinforced frames and hydraulic dampers ensure stability in extreme weather conditions.   Commonly used in military and industrial hangars requiring rapid access.   4. Overlap Door (Sectional Door) Maximum Dimensions: Single Panel Width: Up to 30 meters (98 feet).   Height: Customizable based on structural design (no fixed limit).   Features:   Modular design with movable columns allows sectional operation, ideal for hangars with limited lateral clearance.   Panels overlap during opening/closing, minimizing space occupancy.   High flexibility for irregularly shaped openings or multi-door configurations.   Key Design Considerations 1.Material Strength:    High-tensile fabrics (e.g., PVC-coated polyester) and aluminum/steel frameworks ensure load-bearing capacity and longevity.   2.Wind Resistance:    Engineering calculations for wind pressure (e.g., EN 12424 standards) dictate reinforcement requirements.   3.Automation Compatibility: Integration with motorized systems for remote operation and safety sensors (e.g., obstacle detection).   4. Customization: Manufacturers often tailor door dimensions, insulation, and sealing solutions to meet specific hangar needs.   Recommendations For precise maximum size specifications, consult certified manufacturers such as Haian Saduqi Intelligence Technology Co., Ltd. (Email :saduqi01@gmail.com). 

In the realm of critical safety infrastructure, explosion-proof fire-resistant rolling shutters (EPFRS) serve as vital protective barriers for industrial facilities, commercial complexes, and specialized containment zones. With diverse market offerings, the selection process requires meticulous technical evaluation through these key parameters:   Certification Compliance & Regulatory Approvals Prioritize manufacturers holding full-system explosion protection certification (e.g., ATEX 114 compliance for EU markets or FM Approvals for North America). Leading production bases like Nantong-certified factories typically maintain comprehensive documentation including: Third-party fire resistance test reports (GB/T 7633 standards) Explosion containment certifications (EN 1127-1:2019) CE/PED certifications for European deployments UL listings for North American markets   Fire Performance Specifications Opt for shutters with multi-layered composite structures: Core: High-density fire-resistant rock wool (≥120kg/m³) with 4-hour minimum fire integrity (BS 476-22 tested) Cladding: Galvanized steel shells (≥1.5mm thickness) with intumescent fire-retardant coatings Integration: Continuous smoke seals meeting EN 1363-1 leakage criteria   Explosion Mitigation Engineering Evaluate blast-resistant engineering features: Reinforced guide channels with shock-absorbing brackets (minimum 6mm steel) Multi-point locking system with blast pressure distribution design Deformation tolerance: ≤3mm/m under 0.3 bar overpressure (EN 14994 compliance)   System Integration Capabilities Verify compatibility with existing safety infrastructure: Interface standards: Modbus RTU protocol for BMS integration Motor specifications: 380V/50Hz explosion-proof motors (Ex d IIC T4 rating) Emergency power: 72-hour battery backup with auto-charging system   Manufacturing Capability Assessment Inspect production facilities for: Automated panel forming lines (minimum 600T hydraulic press) Robotic welding stations with NDT testing Full-scale fire testing chambers (per EN 1634-1) Annual capacity ≥50,000 m² for consistent quality control   Material Traceability Demand material certificates: Steel mill test certificates (EN 10204 3.1) Fire insulation material SDS (Safety Data Sheets) Corrosion protection certifications (ISO 12944 C4-M rating)   Performance Testing Protocols Require witnessed testing of: Cyclic endurance: 10,000 operation cycles (EN 12453) Wind load resistance: Class 8 (EN 12424) Impact resistance: 50kg sandbag drop test from 2m height   Service & Maintenance Provisions Evaluate manufacturer support: On-site load testing equipment Predictive maintenance programs with IoT monitoring   By systematically evaluating these technical parameters, facility managers can procure EPFRS systems that deliver certified explosion containment (up to 2 bar) while maintaining critical fire compartmentalization during extended emergency scenarios. Always insist on factory acceptance testing (FAT) and third-party inspection reports to ensure complete compliance with project-specific safety requirements.

Steel fire-resistant roller shutters and standard steel roller shutters both fall under the category of roller shutters and share the same steel material. Despite their similar names, these two types of shutters serve distinct purposes. Below is an analysis of their key differences:   Different Usage Scenarios Steel fire-resistant roller shutters are primarily installed in commercial spaces such as shopping malls, supermarkets, and underground parking garages. Underground environments are often damp, making inorganic fabric-based shutters unsuitable due to moisture absorption. These shutters are designed to prevent the spread of flames in large fire zones where traditional fire doors cannot be used. They are critical for protecting lives and property and are typically integrated into a building’s internal fire safety partitions. Standard steel roller shutters, on the other hand, are far more common. They are widely used for storefronts and residential garages, primarily serving as security barriers against theft and external threats. They are generally installed on building exteriors.   Motor and Wiring Differences Steel fire-resistant shutters use explosion-proof and fire-resistant motors with a minimum protection rating of IP55. In contrast,standard steel shutters rely on ordinary motors with lower protection ratings (e.g.,IP23 or IP44), which are inadequate for fire hazards. The explosion-proof motor’s wiring system includes a sealed junction box with high-density gaskets, and internal motor windings are fully enclosed to prevent spark generation. Power supply connections feature extended, movable flame-retardant conduits with threaded interfaces, ensuring compatibility with fire-rated electrical conduits. This design achieves complete fire-resistant sealing.   Filler Material Variations Fireproof explosion-proof shutter doors use hollow, bent steel slats without internal fillers.Fire-resistant steel shutters, however, incorporate asbestos—a flame-retardant and heat-insulating material—within their slats. Asbestos is chosen for its high tensile strength, flexibility, resistance to chemical and thermal erosion, and electrical insulation properties. Its presence directly determines the shutter’s fire resistance performance.   Control System Distinctions Standard steel shutters may operate manually or via basic motorized controls, with independent physical or motorized switches. If the motor fails, manual operation remains an option. Fire-resistant steel shutters, however, are integrated into a building’s central fire control system. During emergencies, these shutters automatically activate upon receiving signals from the fire control center, ensuring coordinated fire response. The above points outline the critical differences between steel fire-resistant roller shutters and standard steel roller shutters. Understanding these distinctions helps clarify their respective roles in safety and functionality. Fire-resistant shutters prioritize life safety and regulatory compliance, while standard shutters focus on convenience and basic security.

In industrial environments where hazardous materials are handled,ensuring safety is of utmost importance.Steel explosion-proof rolling shutter doors are designed to provide unparalleled protection against explosions,fires,and structural collapses.But how exactly do they work?Let’s take a closer look.   These doors are made of reinforced steel,capable of withstanding extreme pressures and high temperatures.Their multi-layered structure combines fire-resistant materials with impact-absorbing mechanisms to form a barrier that prevents the spread of explosions.Stainless steel explosion-proof door doors also feature a sealed design that prevents toxic smoke and debris from escaping hazardous areas,protecting personnel and equipment.   A key advantage of these doors is their automatic response system.Equipped with sensors,the doors can be activated immediately in an emergency,closing off the area within seconds.This rapid response helps to minimize damage and ensures compliance with strict safety regulations.Moreover,their durable steel construction is resistant to corrosion,making them ideal for industries such as oil and gas,chemical plants,and pharmaceuticals.   In summary,steel explosion-proof rolling shutter doors are specifically designed to withstand the extreme conditions that may arise from potential explosions.The robust steel structure provides a strong barrier to contain blasts and prevent the spread of dangerous gases or flames.The rolling shutter mechanism allows for quick and efficient operation,enabling the door to close rapidly in emergencies to seal off hazardous areas and protect people and property.

  Industrial high-speed doors are also known as high-speed rolling shutter doors. They are favored for their high opening speed, excellent sealing performance and diverse application fields. Currently, the commonly used high-speed doors mainly include PVC high-speed doors, rigid high-speed doors, cold storage high-speed doors, stacking high-speed doors and anti-collision high-speed doors. PVC High-Speed Doors   The operating speed of PVC high-speed doors can reach 1.2 m/s, and they can be opened 500 - 800 times a day with a long service life. The door curtain is made of single-layer industrial fabric, mainly composed of polyvinyl chloride (PVC). It has the characteristics of high strength, wear resistance, corrosion resistance and good insulation. The door curtain can also be customized in different colors such as blue, white, red, gray and fully transparent. Due to the influence of the door curtain material, it is not used alone as an exterior door. It is suitable for places such as the food, pharmaceutical, precision metal, textile, warehousing and logistics industries to play a role in sealing and partitioning. Various intelligent sensing devices such as radar, remote control, geomagnetic, pull rope, Bluetooth opening, face recognition, card swiping access control and AGV linkage can be optionally installed to meet the needs of various different scenarios. Rigid High-Speed Doors   Rigid high-speed doors are also called turbo rigid shutter doors. The opening speed can reach 1.0 to 1.2 m/s, and the closing speed is 0.6 m/s. The structure of the turbo rigid shutter door mainly consists of the door body, driving device, sealing system, control system and safety protection system. The door panel is made of 0.7 mm thick double-layer high-strength aluminum alloy material. The surface has pressed stripes, and the middle is filled with high-density polyurethane foam. The total thickness of the door panel is 43 mm. The track adopts a galvanized plate double-helix guide rail. The door body has a non-contact rolling-up technology and is safely rolled into the spiral track. There is no friction, the door body runs fast, smoothly and quietly, and there is no wear, which greatly extends the service life of the door body. Multiple opening methods such as radar, geomagnetic, pull rope, remote control, Bluetooth opening and face recognition, card swiping access control can be selected. Cold Storage High-Speed Doors   Cold storage high-speed doors are usually installed in warehouses below zero degrees Celsius. For a normal doorway of 2 - 3 meters, it takes 2 seconds to complete the opening and 3 seconds to complete the closing. Cold storage high-speed doors use multi-layer double-sided high-strength polyester fiber with a thickness of more than 30 mm, which can perform good internal and external heat insulation and heat preservation. Heating wires are installed at the guide rails to effectively prevent water vapor from freezing and affecting the operation of the high-speed rolling shutter door. When the cold storage high-speed rolling shutter door is opened, it is linked with the air curtain machine, which can effectively remove water droplets on the surface of the door curtain and prevent the door curtain from freezing. It can be connected to multiple opening methods such as geomagnetic, radar and pull rope. It is also equipped with various safety devices, such as safety light curtains, airbags, anti-collision columns and door-shaped anti-collision columns, to ensure the safe operation of the door body. Anti-Collision High-Speed Doors   Anti-collision high-speed doors are also called zipper-type high-speed doors. Their opening and closing speeds can reach 1.2 m/s. The appearance of anti-collision high-speed doors is almost the same as that of PVC high-speed doors. The zipper high-speed rolling shutter door adopts a side zipper structure with a reset mechanism. If the door curtain of this structure falls off the track, for example, due to human impact or accidental collision resulting in the derailment of some connections of the door curtain, its self-repairing system will automatically guide the door curtain back onto the track in the next operation cycle. After the track restoration is completed, the door can still operate normally without manual repair. It has high durability and saves maintenance costs. Stacking High-Speed Doors   Stacking high-speed doors are also called wind-resistant stacking doors. The opening speed is generally 0.6 - 0.8 m/s. They adopt a folding lifting method, and the door curtain can be stacked together when opened, reducing the occupied space. Stacking high-speed doors use multiple built-in horizontal wind-resistant levers, and the wind pressure can be evenly distributed across the entire door curtain. This design enables them to resist high wind speeds, and their wind resistance is stronger than that of other high-speed doors. They are especially suitable for logistics passages and large factory openings.   Industrial high-speed doors are a type of doors with diverse functions. According to different application scenarios and requirements, different types of industrial high-speed doors can be selected. The characteristics of these types of industrial high-speed doors are different, but they can all provide users with functions such as fast opening and closing, energy saving and high efficiency, wind protection, dust prevention, insect prevention and heat preservation, providing important guarantees for the industrial and commercial fields.

Fire incidents can cause significant damage to properties and pose a risk to lives. To enhance fire safety, the installation of fire protection and insulation shutter doors is crucial. Fireproof rolling shutter doors require two key characteristics: integrity and insulation. 1. Integrity: Integrity refers to the ability of a fire door to maintain its structural stability during a fire. Fire Protection and Insulation Shutter Doors are designed with materials that can withstand high temperatures and prevent the spread of flames, gases, and smoke to adjacent areas. The integrity of these doors acts as a barrier, limiting the fire's impact and providing valuable time for evacuation. 2. Insulation: Insulation plays a crucial role in minimizing heat transfer during a fire. Fire Protection and Insulation Shutter Doors are constructed with insulating materials that can resist heat transmission. This insulation property helps to control the temperature on the non-fire side of the door, protecting people and property from the intense heat generated by the fire. The integration of integrity and insulation in fireproof rolling shutter doors offers several important benefits: 1. Controlling Fire Spread: Fire Protection and Insulation Shutter Doors with high integrity and insulation significantly reduce the spread of fire, smoke, and heat. This containment limits damage to adjacent areas and allows occupants more time to evacuate safely. 2. Enhancing Evacuation Safety: Fireproof rolling shutter doors with integrity and insulation provide vital escape routes during a fire emergency. They promote safe and efficient evacuation by preventing the rapid spread of flames and reducing the risk of exposure to toxic gases and excessive heat. 3. Protecting Property: The combination of integrity and insulation in Fire Protection and Insulation Shutter Doors helps safeguard property and minimize fire damage. By preventing the fire from spreading rapidly, valuable assets and infrastructure within the building can be preserved to a greater extent.

Fire incidents pose a significant threat to human lives and property safety. In the quest for effective fire safety measures, fireproof roller shutters have emerged as a reliable security solution. This article aims to explore the features and significance of fireproof roller shutters in ensuring the safety and protection of buildings. Features of Fireproof Rolling Shutter Doors: Fireproof roller shutters are specifically designed to prevent the spread of fire in case of an emergency. Compared to regular roller shutters, fireproof roller shutters possess the following features: 1. Fire and Smoke Barrier: Fireproof roller shutters effectively block the spread of fire and toxic smoke, thereby isolating the fire incident and providing a crucial window of time for safe evacuation. 2. High-Temperature Resistance: Constructed with fire-resistant materials, fireproof roller shutters can withstand high temperatures for extended periods, ensuring the structural integrity of buildings. 3. Automatic Control System: Many fireproof roller shutters are equipped with an automatic control system. They can be triggered by fire alarms or manually operated to swiftly close the shutter, preventing the fire from spreading further. Importance and Applications: Fireproof roller shutters play a vital role in numerous types of buildings. They find widespread application in the following contexts: 1. Commercial Buildings: Buildings with high foot traffic such as shopping malls, hotels, and office complexes require fireproof roller shutters to facilitate safe evacuation of employees and customers during fire emergencies. 2. Industrial Facilities: Factories, warehouses, and similar facilities often store flammable materials. Fireproof roller shutters effectively restrict the spread of fire, safeguarding both property and employees. 3. Public Facilities: Safety in public facilities like hospitals, schools, and airports is of paramount importance for protecting lives. Fireproof roller shutters provide emergency evacuation routes, minimizing harm to individuals during fire incidents.