ASTM E84 Building Materials Surface Burning Characteristics Test
Apparatus
Application:
This method is applicable to determine surface burning
characteristics of building materials and flame propagation rate of
exposed surfaces such as walls and ceilings (including solid
plastics), at the same time measure smoke density.
This test method applies to the exposed surface which includes
ceiling or walls, provided that the materials or the whole
assembly, with its own structural quality or the aspect in which is
tested and intended to use is able to support itself in position or
being supported during the period of test. The method is used to
determine the corresponding burning behavior of the material by
observing the flame spread along the test specimen. Reports are
made for the flame spread and smoke density developed and it is not
necessarily a relationship between the two measurements.
Standard:
ASTM E84: standard test method for surface burning characteristics
of building materials
UL723: test for surface burning characteristics of building
materials
Parameters:
1. Power: AC380V±10%
2. Max Power: 5KW
3. Test tunnel furnace: length 7.62M, open end cross section 0.45M
* 0.3M, firebrick max temperature 2500℃
4. The test chamber is made of 16 isometric observation windows,
and one fire observation window, which is a double-layer
high-temperature quartz glass, SUS304 stainless steel frame.
5. Adopt water seal structure, the two sides of sample cover plate
are broken into the tank during test, in order to sealing
performance is better.
6. Air inlet is adjustable shutter, which could control air flow
inside furnace more accurately.
7. Thermocouple: K-type, diameter 3mm, 3 sets, Omega USA imported,
high precision, long service life, measuring range: ≤1300 ℃
8. Exhaust port: which is from rectangle to round, diameter 406mm
9. Smoke density measurement: install position is distance tunnel
furnace 4.9~12.2M.
10. Gas burner installation: the burner shall be spaced 305mm from
the fire end of the test chamber, and 190mm below the under surface
of the test sample.
11. The light source: two gas burners, around nozzle distance
203mm, energy output 5.3Mj/min.
12. Ignition system: high voltage electronic ignition.
13. Component material and function:
①. Test furnace size: L9456*W1067*H1400, not including flue.
②. Furnace base is made of 100*50 channel steel welded together,
surface spray treatment
③. Flue: double-layer flue, the center filled with high temperature
asbestos, inner layer SUS304 stainless steel plate, outer layer
galvanized sheet with T1.2
④. Sample plate: calcium silicate cement board, high temperature
resistant to 1300℃
⑤. Sample cover: T2.0 SUS304 stainless steel
⑥. Control box: adopts T1.2 cold plate, CNC machine tool is formed,
arc shape beautiful, surface is white paint.
14. Gas and gas flow control system:
①. Gas: gas (purity 99%), by your own.
②. Gas control system, includes flow meter, U type pressure gauge,
pressure gauge, pressure regulating valve.
③. Flow meter: domestic brand, range 2~20L/min, accuracy 2%.
④. U type pressure gauge: original from USA, water column 0~36
inches, analysis degree 0.1 inch.
⑤. Pressure gauge: 0~200Kpa(0~30psi), resolution 5Kpa.
⑥. Pressure regulating valve: 0~10kg/min continuously adjustable.
15. Smoke density measurement system:
①. Light source: imported quartz halogen lamp.
②. Nominal power: 100W.
③. Nominal voltage: 12V.
④. Nominal light return amount: 2000~3000Lm.
⑤. Receiver: spectral response matches light meter of international
lighting commissioner (CIE).
⑥. Installation: install at one end of the pipe with length 150,
the other end is a dustproof window, inner wall of pipe is glossy
black and anti-reflection.
⑦. Light transmittance 0% means no light passing, 100% means
without shade, all pass through.
Control system:
1. It adopts computer control system, includes PC and printer,
Windows XP operate system.
2. It also includes light transmittance measurement software, which
could output curves and reports. (curves as Figure 1)
3. All electronic originals are domestic leading brands, and all of
them are directly manufacture by supplier, which could guarantee
quality better.
4. The equipment has the following safety protection devices: power
overload, short circuit protection and overload protection of
control circuit.
1. Chimney 2. Smoke density measurement device 3. Panel
4. Removable sample cover 5. Refractory panel 6. Adjustable air
inlet
7. Sample 8. Seal 9. Gusher 10. Sample holder
11. Combustion furnace 12. Foundation