Product Introduction
According to the requirements of ISO 9239-1, ISO 9239-2, and GB/T 11785-2005, the flooring radiant panel test is conducted in a test chamber under a specified radiant heat environment to determine the critical radiant flux of floor coverings under combustion conditions. It can also be used to determine the critical radiant flux of cellulose insulation materials used in attic floors.
When a building catches fire, flames may spread through compartments or adjacent rooms, or hot gases may be released onto the floor surface. During the early stage of fire spread, radiant heat can accumulate in the upper part of the space. Under these conditions, the test can accurately reflect flame spread behavior over flooring materials under opposed-flow ventilation.
Product Model: FTech-ISO9239
Reference Standards
ISO 9239-1: Reaction to fire tests for floorings - Part 1: Determination of the burning behavior using a radiant heat source
ISO 9239-2: Reaction to fire tests for floorings - Part 2: Determination of flame spread at a heat flux level of 25 kW/m²
ASTM E648: Standard Test Method for Critical Radiant Flux of Floor-Covering Systems Using a Radiant Heat Energy Source
ASTM E970: Standard Test Method for Critical Radiant Flux of Exposed Attic Floor Insulation Using a Radiant Heat Energy Source
NFPA 253: Standard Method of Test for Critical Radiant Flux of Floor Covering Systems Using a Radiant Heat Energy Source
DIN 5510-2: Fire behavior and fire side effects of materials and components
GB/T 11785-2005
Structural Features
1. All structural components are made of stainless steel, offering an attractive appearance and excellent corrosion resistance.
2. The test chamber is made of calcium silicate board with a thickness of 13 ± 1 mm and a nominal density of 650 kg/m³.
3. The volume of circulating gas between the test chamber and the specimen is evenly generated on both sides of the specimen, with a flow area of 0.23 ± 0.03 m².
4. The radiant heat source is a gas-fired panel inclined at 30°, directed toward a horizontally placed flooring specimen. The radiant panel generates a heat flux ranging from 10.9 kW/m² to 1.1 kW/m². It can reach 900°C and should include a safety shut-off function.
Imported heat flux meter from the United States, with a measuring range of 20 kW/m².
5. Ignition burner hole diameter: 0.7 mm, 19 holes per row, positioned 60° from the bottom of each center line.
6. Maximum radiant panel temperature: 900°C.
7. The standard calibration board is made of uncoated calcium silicate board with a thickness of 20 ± 1 mm and a density of 850 ± 100 kg/m³; dimensions: 1050 × 250 mm.
8. Equipped with a small stainless-steel pilot burner to assist specimen ignition. The igniter has an inner diameter of 6 mm and an outer diameter of 10 mm. It has two rows of holes: one row with 19 holes of 0.7 mm diameter, and one row with 16 holes of 0.7 mm diameter.
9. Equipped with a flow control valve to precisely control propane flow at 0.026 ± 0.002 L/s.
10. Imported heat flux meter from the United States, with a measuring range of 20 kW/m².
11. Ignition burner hole diameter: 0.7 mm, 19 holes per row, positioned 60° from the bottom of each center line.
12. Equipped with a flow control valve to precisely control propane flow at 0.026 ± 0.002 L/s.
Smoke Exhaust System
1. The exhaust duct shall be equipped with an exhaust device providing an air velocity of 2.5 ± 0.2 m/s.
2. Smoke exhaust capacity: 85 m³/min.
3. The smoke exhaust anemometer has an accuracy of ±0.1 m/s and is positioned 250 ± 10 mm above the lower edge of the chamber flue.
Radiant Heat System
1. Radiant pyrometer accuracy: ±0.5°C, positioned approximately 1.4 m from the radiant panel.
2. The radiant pyrometer sensitivity remains constant within the wavelength range of 1 μm to 9 μm.
3. High-performance K-type sheathed thermocouple, diameter 3.2 mm, with insulated and ungrounded hot junction; positioned 25 mm below the chamber ceiling and 100 mm behind the inner wall of the chamber flue.
4. Heat flux meter measuring range: 0–15 kW/m²; accuracy: ±2%.
5. A radiant pyrometer capable of detecting a diameter range of 250 mm and a blackbody temperature range of 480°C to 530°C should be used to adjust the surface heat flux of the radiant heat panel within the allowable tolerance. Heat flux is measured from 110 mm to 910 mm from the radiant panel at intervals of 110 mm.
6. Equipped with an angle control plate for convenient instrument observation and control during setup and calibration.
Stainless-steel hood with smoke test probe.
7. Data acquisition and analysis software.
8. Flame length adjustment range of the ignition burner: 60–120 mm.
9. According to the airflow conditions of the radiant panel, the critical temperature of the rear panel can be adjusted to 900°C.
Includes smoke density measurement system.
Control System
Standard control cabinet with computer + LabVIEW intelligent control system:
Control parameter setting and display; test status and fault display/query.
Data acquisition and storage; screen monitoring; real-time temperature curves; historical curve and data query.
USB data export; historical curve and data query/printing.
The machine can be operated independently to complete tests.
Equipped with audible alarm and alarm event display functions.
The control box is equipped with USB/RS232 serial ports, allowing connection to a desktop or laptop computer for operation and control, as well as report printing.
Programmable Logic Controller (PLC) control system:
Automatic ignition with ignition failure detection and protection.
Automatic control and display of propane gas flow.
PLC + frequency converter for automatic control and display of exhaust gas flow.
Specifications
Power supply: AC 220V ±10%, 50 Hz
Maximum power consumption: 5 kW
Timing accuracy: <1 s/h
Heat flux meter measuring range: 0–15 kW/m²
Heat flux meter accuracy: ±0.2 kW/m²
Heat flux meter precision: <±2%
Radiant pyrometer range: 400–600°C
Blackbody temperature deviation: <±5°C
Exhaust velocity: 2.5 ± 0.2 m/s
Exhaust capacity: 39–85 m³/min
Equipment Specifications
| Item | Specification |
|---|---|
| Model | TTech-GBT11785 |
| Test frame dimensions | 1,900(W) × 1,400(D) × 2,750(H) mm |
| Control cabinet dimensions | 600(W) × 800(D) × 1,700(H) mm |
| Installation space | - |
| Power | AC 380V, 50/60 Hz, 20A |
| Weight | 200 kg |
| Manual | Available |
| Exhaust | 30–85 m³/min |
Test Results
The critical heat flux, CHF, in kW/m², corresponding to the flame spread length can be observed through heat flux profile testing.
If the specimen test time exceeds 30 minutes, the extinguishing time and the fastest flame spread rate can be recorded and then converted into critical heat flux.
