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.
