Fire Retardant Coatings Tester, ASTM E84 Tunnel Test Equipment
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Technical parameters
| Item | Description |
|---|---|
| Burner Top Diameter | 20mm |
| Burner Height | Approximately 200mm |
| Burner Blue Flame Temperature | (900±20)°C |
| Combustible Gas Source | Natural gas, liquefied petroleum gas, or city gas |
| Thermocouple | Armored thermocouple with precision of work grade, K type, outer diameter not greater than 3mm |
| Electronic Potentiometer | Error less than ±0.5% of the measured temperature |
| Ignition System | High voltage electronic ignition system |
Test Procedures
Equipment Composition: The tunnel method tester consists of a main control box and a combustion chamber. The combustion chamber is a tunnel furnace welded from a metal steel frame, equipped with natural ventilation ports, gas supply ports, and a graduated observation window. The control box is equipped with a digital display temperature control system, a gas flow rate adjustment device, and a combustion temperature recorder.
Test Conditions: The test uses a standard flame of 900±20℃. Temperature monitoring is achieved through thermocouples and an electronic potentiometer. Environmental conditions must meet the requirements of a temperature of 5–35℃ and a relative humidity of ≤85%.
Test Procedure: Under laboratory conditions, the flame propagation characteristics are tested using the tunnel method tester to evaluate the protective effect of the fire-retardant coating on the substrate and the quality of its flame propagation performance.
Results Analysis: Through quantitative analysis, the performance of the fire-retardant coating is evaluated, providing an objective basis for the use and selection of fire-retardant coatings.
The tunnel method test provides objective experimental evidence for the performance evaluation of fire-retardant coatings and is suitable for quantitatively testing the flame retardant performance of fire-retardant coatings applied to the surface of substrates under laboratory conditions.
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