What is a Thermal Radiation Flame Spread Tester?

The Thermal Radiation Flame Spread Tester is designed to evaluate the combustion characteristics of building materials, high-speed train materials, and marine materials. It focuses on critical parameters such as flame spread rate, ignition heat, and total heat release. The device measures flame spread, critical heat flux, and sustained burning heat according to standards such as GB/T 28752-2012 and ISO 5658-2. It is widely applied in building construction, transportation, and shipbuilding for material performance testing under fire conditions.

Applications

The tester is widely used in:

(1) Fire performance testing of construction materials, panels, and insulation boards.

(2) Evaluation of flame spread and heat release for railway vehicle interior materials.

(3) Quality control for industrial safety compliance of rigid and elastic polymeric materials.

(4) R&D of fire-retardant treatments and coatings for building and transport applications.

(5) Certification laboratories assessing compliance with international fire safety standards.

(6) Educational and training institutions teaching material combustion behavior and fire dynamics.

Standards

The instrument complies with domestic and international standards, including:

NF P92-501 – Rate of flame spread for building materials

TB/T 2639.1 – Fire performance testing of railway materials – Radiation test method

ISO 5660 series – Reaction-to-fire tests, heat release rate

ASTM E1354 – Standard test method for heat and visible smoke release rates for materials using oxygen consumption calorimeter

EN 13823 – Reaction to fire tests for building products – Building products excluding floorings exposed to the single burning item

GB/T 28752-2012 – Test Method for Lateral Flame Spread on Vertical Surfaces

ISO 5658-2 – Fire Spread Test for Vertical Surfaces of Building Products

IMO Res.A653(16) – Surface Flammability Test for Bulkhead, Ceiling, and Deck Materials

Instrument Features

(1) Stainless Steel Test Chamber – Interior lined with fire-resistant materials and equipped with transparent observation window.

(2) Air Supply System – Stainless steel tubular inlet with filtration to prevent contamination.

(3) 45° Sample Test Holder – Stainless steel ruler for accurate flame spread distance measurement.

(4) Thermal Radiation Source – Provides adjustable 30 kW/m² heat flux; panel displays real-time power output, eliminating frequent calibration.

(5) Top and Bottom Stainless Steel Burners – Ignites volatile gases; needle valves control flame height with flame height gauges.

(6) Pilot Flame System – Convenient ignition before testing for upper and lower burners; quarter-turn plug valve allows easy flame isolation.

(7) Temperature Monitoring – Thermocouples at top and air inlet display real-time temperature differences.

(8) Software Control – Automated calculation of flame indices: Flame Initiation Index (i), Average Flame Height Index (S), Maximum Flame Height Index (h), and Heat Release Index (C); built-in report generation and print capability.

Technical Specifications

Accessories

(1) 45° stainless steel test holder with measurement scale

(2) Transparent observation window

(3) Air filtration unit for clean airflow

(4) Thermocouples and digital display

(5) Software package with automated calculation and reporting

Test Procedures / Maintenance

(1) Mount the sample on the 45° test holder.

(2) Adjust the thermal radiation source to the required 30 kW/m² heat flux.

(3) Ignite top and bottom burners using pilot flame system.

(4) Observe flame propagation and record data via software.

(5) Software automatically calculates flame indices and generates reports.

(6) After testing, extinguish burners, clean chamber interior, and remove residue.

(7) Regularly calibrate radiation flux, thermocouples, and flame height gauges to ensure accurate results.

Core Advantages of the Thermal Radiation Flame Spread Tester

The Thermal Radiation Flame Spread Tester offers a key advantage in its ability to accurately simulate the thermal radiation environment of real fire scenarios, enabling a scientific evaluation of the fire propagation risk of materials under different heat flux conditions.

1. Core Technical Advantages

Realistic Simulation of Fire Thermal Environment:

The device uses a gas radiation panel to generate continuously adjustable radiant heat flux, closely replicating the thermal radiation conditions present in the early stage of a fire.

Precise Quantification of Combustion Behavior:

It can accurately determine the critical heat radiation flux and flame spread rate of materials, providing a scientific basis for fire resistance classification and safety evaluation.

Automation and Standardization:

The tester complies with international testing standards, ensuring that results are objective, highly repeatable, and globally recognized.

2. Wide Industry Applications

Rail Transit and Aviation:

It is used to evaluate the flame retardant and flame spread resistance of high-speed train interiors, aircraft seats, and insulation materials, ensuring sufficient evacuation time in emergencies.

Construction and Building Materials:

The device measures surface burning behavior of wall panels, ceilings, and flooring materials to ensure compliance with fire safety regulations.

Cable and High-Risk Industrial Sectors:

It tests the fire resistance of special cables under external radiant heat conditions, preventing flame propagation along wiring systems.

Conclusion

In summary, the Thermal Radiation Flame Spread Tester plays a crucial role in fire safety evaluation by providing a realistic simulation environment, precise quantitative data, and standardized testing results. It is widely used across transportation, construction, and electrical industries to ensure material safety and regulatory compliance.