What are the features of the vertical fire resistance test furnace for building elements?

The Vertical Fire Resistance Test Furnace for Building Components is a specialized testing instrument of vital importance in the field of fire safety. It is primarily used to evaluate the fire resistance performance of walls, doors, windows, fire shutters, and non-load-bearing vertical partition components under standard fire conditions. As a key piece of equipment for determining whether building materials can effectively prevent the spread of fire and provide sufficient evacuation time for occupants, it plays the role of a "gatekeeper" in modern building fire protection systems. This article mainly analyzes the features and advantages of this equipment to provide readers with a deeper understanding of it.

Detailed Features of the Vertical Fire Resistance Test Furnace for Building Components

Box-Type Furnace Body with a Frame Structure and Stable Construction: The interior is insulated using refractory bricks and high-temperature-resistant fibers to ensure the furnace temperature while reducing the impact of high temperatures on the surrounding environment.

Steel Platforms Around the Furnace Body: Steel platforms are installed around the furnace body to facilitate movement and access for operators.

Surface Treatment of Exposed Components: All exposed components of the test furnace are coated with finishes that meet the requirements of the corresponding operating environment, satisfying corrosion resistance and appearance requirements.

Number of Burners: 12 flat-flame proportional burners, with 6 burners on each side (for a 5-meter furnace chamber).

Operating Temperature: Maximum test temperature of 1250°C; design temperature of 1350°C.

Combustion Mode: Low-velocity proportional flat-flame diffusion combustion mode, with gas and air pressures ≤4000 Pa and a flame length ≤500 mm.

Automatic Burner Flameout Protection: If a burner extinguishes itself, the computer immediately displays an indication and triggers audible and visual alarms. The liquefied petroleum gas supply to the extinguished burner is automatically shut off, while the other burners continue operating normally. Operators can go to the furnace to troubleshoot and resolve the problem.

Pressure Relief and Explosion-Proof Systems: The furnace is equipped with a pressure relief device and an explosion-proof system.

Burner Fuel Supply Components: The burner fuel supply system includes gas solenoid valves, gas proportional valves, gas ball valves, gas transmitters, and other components to ensure the control and monitoring of gas supply and the safe operation of the equipment.

Combustion Air Supply System: A combustion air blower is provided to supply air for combustion. A combustion air frequency converter is used to adjust the blower air supply volume to achieve an appropriate air-fuel ratio, and a pneumatic manual valve is provided to control the opening and closing of the air supply.

Main Gas Pipeline Components: The main pipeline is equipped with solenoid valves, ball valves, pressure-reducing valves, filters, and other components to ensure stable overall gas supply pressure and rapidly shut off the gas supply after the test.

Independent Control System: An independent control system with dedicated control components is used to control the combustion process and simulate the combustion curve.

Brick-and-Concrete Exhaust Duct: The exhaust duct adopts a brick-and-concrete structure that can withstand high combustion temperatures.

High-Temperature-Resistant Exhaust Fan: A high-temperature-resistant exhaust fan and frequency converter are provided to discharge combustion exhaust gases during operation.

Furnace Temperature Monitoring Points: 9 temperature monitoring points are provided. Inside the furnace, K-type nickel-chromium/nickel-silicon thermocouples with a wire diameter of 2.0 mm, as specified by the relevant standards, are used. Each thermocouple is covered with a heat-resistant stainless steel protective tube, with heat-resistant material filled in between. The hot junction extends at least 25 mm beyond the protective tube. Temperature accuracy is less than ±15°C.

Control Mode: Computer + intelligent instruments + programmable logic controller (PLC) for automatic control.

Automatic Temperature Curve Tracking and Adjustment: The actual furnace temperature curve can be tracked against the preset curve on the computer screen. The computer automatically corrects temperature deviations by rapidly and automatically adjusting the burners between high-fire and low-fire modes.

Automatic Data Storage and Traceability: All automatically controlled operating data are stored in the computer and can be checked at any time to verify control accuracy.

Advantages of the Vertical Fire Resistance Test Furnace for Building Components

The core advantages of the Vertical Fire Resistance Test Furnace for Building Components lie in its ability to realistically simulate the fire exposure conditions of vertical partition components during a fire, while one furnace can accommodate multiple standards and various component types, with excellent repeatability and reproducibility of test data.It is primarily used to determine the fire resistance limits of vertical components such as fire doors, fire shutters, walls, columns, and beams, directly affecting occupant evacuation and the effectiveness of fire compartmentation in building fires.

Main Advantages

1. Realistic Simulation of Vertical Fire Exposure Conditions

The vertical furnace can reproduce the actual conditions in which walls, doors, fire shutters, and other components are exposed to fire on one side, while flames and hot gases may penetrate through to the opposite side. This is a condition that horizontal furnaces cannot test.

It controls the furnace temperature according to the standard temperature-rise curve while monitoring furnace pressure and the temperature on the unexposed surface, thereby evaluating the integrity, insulation performance, and load-bearing capacity of the components.

2. Multi-Purpose Testing with Broad Standard Coverage

A single piece of equipment can accommodate various components, including fire doors, fire shutters, fire-resistant glass, fire-resistant partitions, fire windows, and fire stopping systems. It can cover multiple national standards and international specifications without requiring separate equipment purchases for different products.

3. Precise Temperature Control and Reliable Data

The equipment adopts fully automatic PID regulation to automatically match the standard temperature-rise curve and collect furnace temperature, pressure, and flow data in real time.

The test temperature can reach 1300°C or even 1600°C. Furnace temperature accuracy is controlled within ±15°C, while unexposed surface temperature accuracy is ±4°C, ensuring repeatable and reproducible test results and meeting the data review requirements of CMA- and CNAS-accredited laboratories.

4. Multiple Safety Protection Mechanisms

The equipment is equipped with multiple safety mechanisms, including gas leakage alarms, overpressure venting, automatic electromagnetic valve shutoff, leakage protection, air duct thermal protection, and pressure release protection.

In abnormal situations, the system automatically triggers alarms and immediately cuts off the gas supply to stop operation.

The furnace body adopts a multilayer composite high-temperature-resistant structure. When the inner layer reaches 1300°C, the outer wall remains at room temperature, eliminating the risk of burns caused by high temperatures.

5. Intelligent Operation and Data Traceability

The fully automatic control system is combined with a visual operating interface to display temperature curves and pressure curves in real time during testing.

Data are automatically saved and can be retrieved at any time. Standard test reports can be generated with one click, reducing errors caused by manual operation.

Conclusion

Based on the above introduction, it can be understood that the Vertical Fire Resistance Test Furnace for Building Components is not merely a precision testing instrument but also a bridge connecting materials science with public safety.With continuous technological advancement, future test furnaces will develop toward higher temperature resistance, more intelligent control, and greater energy efficiency and environmental friendliness, providing solid technical support for building a more resilient urban fire safety system.Behind every precise temperature rise and rigorous test lies a solemn commitment to life safety.