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Structure and operating principle of fireproof duct EI45

STRUCTURE AND OPERATING PRINCIPLE OF FIREPROOF AIR DUCT EI45

Introduce

EI45 fire-resistant duct is one of the important components in the fire protection system of modern buildings. This product is specially designed to prevent the spread of smoke and fire between areas in the building, ensuring the safety of users and property in case of fire. The EI45 index indicates that the duct is fire-resistant and insulated for a minimum of 45 minutes according to international standards.

Structure of fireproof duct EI45

1. Main materials

EI45 fireproof duct is made from special materials that are heat resistant and non-flammable. Main components include:

  • Galvanized steel sheet: This is the basic material to create the frame and body of the air duct. Galvanized steel has high mechanical strength, good corrosion resistance and especially the ability to withstand high temperatures. The thickness of the steel is usually from 0.8mm to 1.2mm depending on the size and technical requirements of the air duct.
  • Insulation materials: Inside or surrounding the air duct is a layer of special insulation material, usually mineral fiber, fireproof glass wool or calcium silicate. This insulation layer is capable of withstanding temperatures up to 1000°C without deforming or burning.
  • Fireproof coating: The outer surface of the duct is coated with a special fire-resistant material, usually fire-resistant paint, silicate or other fire-resistant compounds. This coating will expand when exposed to high temperatures, forming an additional layer of insulation.

2. Special structure

  • Joints and links: The joints between duct sections are specially designed with fire-resistant materials. Typically, these joints are reinforced with fire-resistant tape, heat-resistant silicone sealant, or other bonding materials that are capable of maintaining their integrity in the event of fire.
  • Flanges and gaskets: The flanges connecting the pipe sections are made of thicker steel and protected with fire-resistant materials. Special gaskets are used at the joints to ensure fire resistance and insulation.
  • Suspension and mounting systems: The EI45 fire rated ductwork suspension and support system is also designed to withstand high temperatures for long periods of time. The suspension bars are usually made from high strength steel and protected with fire resistant materials.

3. Auxiliary components

  • Fire-fighting valve: Fire dampers are installed at strategic locations in the ductwork system. These valves will automatically close when high temperatures or smoke are detected, preventing the spread of fire and smoke.
  • Heat and smoke sensors: EI45 fire-resistant duct systems are often integrated with heat and smoke sensors to detect early signs of fire.
  • Outer protective layer: In some cases, EI45 fire-resistant ductwork is also covered with an additional protective layer on the outside to enhance fire resistance and insulation.

Operating principle of EI45 fireproof duct

1. Basic principles

EI45 fire-resistant duct works based on three basic principles:

  • Integrity (E): Is the ability to maintain the physical structure and prevent fire from passing through for a period of 45 minutes. This ensures that fire cannot spread from one area to another through the duct system.
  • Insulation (Insulation – I): The ability to limit the transfer of heat through the duct wall, ensuring that the temperature on the unburned side does not rise above 140°C (at any point) or 180°C (average temperature) within 45 minutes. This prevents combustible materials near the duct from being heated to the point of ignition.
  • Smoke resistance: Although not specified in the EI45 rating, fire-rated ductwork must also be able to prevent the spread of smoke, a major contributor to fatalities in fires.

2. Fire protection mechanism

In case of fire, EI45 fireproof duct will operate according to the following mechanisms:

  • Active insulation layer: When the temperature increases, the insulation layer will absorb and disperse heat, minimizing heat transfer through the duct wall.
  • Reactive fire retardant coating: The fireproof coating on the duct surface will expand when exposed to heat, forming a thicker insulating layer, further reducing heat transfer.
  • Fire-activated damper: Fire dampers in the system will automatically close when high temperature or smoke is detected, preventing the spread of fire and smoke through the duct system.
  • Maintain structural integrity: Thanks to its special materials and structure, EI45 fire-resistant ducts maintain their shape and integrity for at least 45 minutes when exposed to fire, without collapsing or being seriously damaged.

3. Control and operation system

EI45 fire-resistant ducts are often integrated into the building's overall fire protection system:

  • Connect to the central fire alarm system: Heat and smoke sensors in the duct system are connected to the building's central fire alarm system.
  • Automatic operation: In case of fire, the fire valves will automatically close according to the signal from the fire alarm system or from the heat sensors installed directly on the valve.
  • Smoke exhaust fan system: In many cases, EI45 fire-resistant ducts work in conjunction with exhaust fan systems to remove smoke and toxic gases from the fire area, facilitating evacuation and fire fighting.

Applications and benefits of EI45 fireproof duct

1. Popular applications

EI45 fireproof duct is widely used in many different types of constructions:

  • High-rise buildings: Offices, apartments, hotels where fire safety is a top priority.
  • Hospitals and medical facilities: A place where many people are unable to evacuate themselves in an emergency.
  • Shopping malls and shopping centers: Public spaces with high density of people.
  • Factories and manufacturing facilities: Especially in places with high risk of fire and explosion.
  • Schools and educational institutions: A place where many children and teenagers gather.

2. Main benefits

  • Enhanced safety for users: Prevent the spread of smoke and fire, creating time for safe evacuation.
  • Asset protection: Minimize property damage caused by fire.
  • Comply with legal regulations: Comply with current fire prevention and fighting standards and regulations.
  • Reduce insurance costs: Many insurance companies offer lower rates for buildings with complete fire protection systems, including fire-rated ductwork.
  • Integration capabilities: Easily integrated with other fire protection systems in the building.

Installation and maintenance of EI45 fire-resistant ductwork

1. Installation process

Installation of EI45 fire-resistant ductwork requires strict compliance with the manufacturer's standards and instructions:

  • Survey and design: Assess the needs and actual conditions of the project to design a suitable duct system.
  • Prepare materials: Ensure all materials and components meet EI45 fire resistance standards.
  • Installing the pipe body: Install ductwork sections according to design, ensuring joints are properly treated with fire-resistant materials.
  • Installing the suspension and bracket system: Ensure the suspension system is sufficiently sturdy and fire-protected.
  • Installation of auxiliary components: Install fire valves, sensors and other equipment according to design.
  • Inspection and acceptance: Test the entire system to ensure all components are functioning properly and meet safety standards.

 

 

2. Periodic maintenance and inspection

To ensure that the EI45 fire-resistant duct always operates effectively, periodic maintenance and inspection are required:

  • Visual inspection: Check for signs of damage, leakage or deformation of the ductwork and components.
  • Functional testing: Ensure fire dampers and auxiliary equipment operate properly.
  • Regular maintenance: Clean, repair or replace damaged or deteriorated components.
  • Check the certificate: Ensure the system continues to meet current standards and regulations.

Conclude

EI45 fire-resistant duct is an essential component in modern fire protection systems. With its special structure made of fire-resistant and insulating materials, this product is capable of preventing the spread of fire and smoke for at least 45 minutes, creating favorable conditions for evacuation and fire fighting.

Understanding the structure and operating principles of EI45 fire-resistant ductwork not only helps engineers and designers choose and install suitable products, but also helps investors and users realize the importance of this system in ensuring safety for buildings and people.

With a commitment to constantly improve and enhance product quality, Sao Viet Duct Trading and Manufacturing Company Limited is proud to provide EI45 fireproof duct solutions that meet international standards, contributing to building a safer living and working environment for the community.

Contact information

SAO VIET AIR DUCT MANUFACTURING AND TRADING COMPANY LIMITED

  • Address: 267 Le Thanh Tong, May Chai, Ngo Quyen, Hai Phong
  • Hotline:
  • Mrs. Hang: 0985239838
  • Mrs Giang: 0934559168
  • Customer Service: 0822555659
  • Website: www.onggiosaoviet.vn

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