Paper-faced gypsum board fire stability tester

Paper-Faced Gypsum Board Fire Stability Tester

I. Scope of Application:

The Paper-Faced Gypsum Board Fire Stability Tester, also known as the Paper-Faced Gypsum Board Fire Stability Combustion Test Apparatus, complies with GB/T9775-2008 (ISO6308:1980) "Paper-Faced Gypsum Board". It is used to determine the fire stability of refractory gypsum boards and is also applicable for testing the fire performance of other building materials, decoration, and finishing materials. Complies with GB/T9775-2008 (ISO6308:1980) "Paper-Faced Gypsum Board".

II. Compliance Standards:

Complies with GB/T9775-2008 (ISO6308:1980) "Paper-Faced Gypsum Board".

II. Test Introduction:

The specimen is drilled and conditioned under specified environmental conditions. The specimen is suspended between two flame nozzles using support rods, with the flame nozzles perpendicular to the specimen surface. Using liquefied gas as the heat source, gas is supplied to the two burners of the fire stability tester. The flame nozzles are 30mm away from the board surface. According to the standard, a load is suspended at the lower end of the specimen, and the burners are ignited. A thermocouple is used to measure the temperature 5mm from the board surface. During the initial stage of the test, charred facing paper that falls on the thermocouple should be removed without causing the specimen to shake. Through adjustment, the temperature is controlled to (800±30)°C within 3 minutes, and this temperature is maintained throughout the test. The time is recorded from the moment the specimen is exposed to fire until it fractures and fails. The burning time until fracture is recorded for each specimen, and the minimum value among five specimens is taken as the fire stability of the group, accurate to 1 minute.

III. Main Technical Parameters:

1. Power Supply Voltage: 220V±10% 50Hz Power: 180W

2. Automatic ignition function

3. Dual thermocouple temperature measurement

4. Digital display of temperature and time

5. Dual burners, inner diameter Φ9.5mm±0.5mm, length about 100mm, with air adjustment nut 10mm, flame nozzle diameter (40±1)mm, flame hole diameter (2.5±0.1)mm

6. Flame length adjustable from 20mm to 100mm

7. Flame application time and holding time adjustable from 0 to 99 minutes and 99 seconds

8. Automatic control of the test process.

9. Automatic recording of burning time upon specimen fracture.

10. Gas Source: The test flame gas source uses coal or petroleum gas (it is recommended to use gas with better quality whenever possible).

11. Flow rate adjustment range: 100～1000mL/Min

12. Timing accuracy (resolution): 0.1s

13. Test Temperature: 800±30°C, maximum temperature 900°C, accuracy class 1

14. Temperature stabilization time <3min (800±30)°C

15. Specimen: 300mm (length) × 50mm (width), with holes drilled 25mm from both sides

16. Suspended Load: 7, 10, 12, 15, 17, 20N

17. Dimensions (mm): 700 (width) × 300 (depth) × 600 (height)

18. Outer Packaging Dimensions (mm): 800 (width) × 420 (depth) × 700 (height)