Fire Resistance Test Furnace for Building Materials
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The building materials flammability testing furnace is a testing instrument prepared according to GB/T 8625-2005 "Test Method for Flammability of Building Materials". It is used to determine whether building materials are flammable. Materials that pass the test in this combustion furnace and also pass the building materials flammability test can be classified as flame-retardant building materials.
Application
DIN 4102-16 describes the uniform procedure for testing building materials in the "Brandschacht" according to DIN 4102-15. The revision of DIN 4102-16 is carried out in order to update the list of standardised products that are used in the test method. The test method is used for the fire testing of building materials. The Brandschacht is a square housing into which air at a constant flow rate is introduced from below, and from which flue gas escapes from above. It is equipped with a square gas burner by means of which the specimen arranged in a mounting frame so as to form a flue, are exposed to flaming.
Brandschacht Test Apparatus, in accordance with DIN 4102 Part 15. is designed for the fire testing of building materials and elements. The ‘brandschacht’ is a square chamber, which has a constant flow of air introduced from the bottom, and combustion gas escapes from the top of the chamber. The specimens are mounted vertically and exposed to the flame generated by a square gas burner.
Standard
DIN 4102-15/16:Fire behaviour of building materials and elements "Brandschacht"，Fire behaviour of building materials and building components - Part 16: "Brandschacht" tests
EN ISO 11925-1：Reaction to fire tests - Ignitability of building products subjected to direct impingement of flame - Part 1: General
EN ISO 11925-2：Reaction to fire tests - Ignitability of building products subjected to direct impingement of flame - Part 2: Single-flame source test
GB/T 8625:Test method of difficult-flammability for building materials
Features
1. Computer-controlled, with a high degree of automation; the next operation information is displayed, and various data and graphs from the testing process can be printed;
2. During furnace wall preheating, the temperature level is intuitively displayed on the computer screen using bar graphs and different colors;
3. The solenoid valve connects the combustible gas and is controlled by the computer. When the maximum flue gas temperature exceeds 200℃, the computer will automatically close the solenoid valve, ensuring safe and reliable testing;
4. Equipped with a high-power constant temperature and constant flow device, providing fast temperature control and accurate flow rate;
5. An imported airflow sensor is used for online flow monitoring, and the results are displayed digitally.
Parameters
| Item | Specification |
|---|---|
| Gas used - Methane flow rate | (35 ± 0.5) L/min, purity > 95% |
| Gas used - Air flow rate | (17 ± 0.2) L/min |
| Specimen size | 4 specimens per test group |
| Thermocouple type | Nickel-chromium-nickel-silicon, wire diameter 0.5mm, outer diameter ≤ 3mm |
| Furnace wall temperature range | Room temperature to 100°C, ±1°C |
| Intake temperature range | 0 to (50 ± 0.5)°C |
| Pressure difference range | 0 to 30Pa, ±1Pa |
| Pressure difference measurement range | 0-100Pa, accuracy 0.2% |
| Temperature recorder and thermostat | Multi-channel continuous temperature recording and curve display |
| Constant temperature | (23 ± 2)°C |
| Constant current | (10 ± 1) m³/min |
| Ambient temperature range | 19 to 30°C |
| Power supply | 380VAC 50HZ |
| Dimensions of combustion shaft furnace (outer) | 1020mm x 1020mm x 3930mm |
| Dimensions of combustion shaft furnace (inner) | 800mm x 800mm x 2000mm |
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