5KW Building Materials Surface Burning Characteristics Testing
Equipment
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.
Features:
1. Measure flame propagation speed is based on the time of flame
through the window to
estimate after lit sample, get flame propagation speed curve, which
method is to draw the
distance and time flame propagation through window. The equipment
should be calibrated firstly
when do test, and then do two preliminary tests. The first
preliminary test is to detect red oak
specimen, artificially set its flame propagation and smoke
generation as 100(this method also
measures material’s smoke generation). The second preliminary test
is to detect asbestos
cement specimen, set its above two values as 0. Then determine
specimen smoke and flame
propagation velocity curve, calculate flam spread index (FSI), the
method is: if this total area is
less than or equal to 29.7m·min, that is FSI=0.515AT; if the total
area is greater than 29.7m·min,
that is FSI=4900／(195-AT).
2. The flame propagation rate of various unprocessed wood is 60 to
230, the smoke generated is
also measured during combustion, and its rank is divided in the
same range.
3. The FSI value of the material measured with tunnel method is
between 0 and 200, the smaller
the FSI value is, the less the fire risk is. The high buildings and
corridor, should use FSI<25
material, 25<FSI<100 material only could be used for fire
requirement not very strict, while
FSI>100 material don’t meet the requirement of flame retardant.
4. Class A is 0-25, Class B is 26-75, Class C is 76-200, the sample
that smoke index less than
450and flame spread rate curve, then calculate flame spread
index(FSI) of the sample, the
method is: if this total area is less than or equal to 29.7m·min,
that is FSI=0.515AT; if the total
area is greater than 29.7m·min, that is FSI=4900／(195-AT).
Procedure:
1. Six pcs samples, placed under 12mm thick calcium silicate
cement.
2. Observe data:
A. Measure the time on flame arrived at each observation point
B. Measure the flame spread distance on the first 1.5 minute
C. Measure the flame spread distance during all the test (10
minutes)
D. Measure the flame spread max distance and time
3. Judgment method:
Classification | Flame spread at 1.5 min (mm) | Final flame spread (mm) |
Class 1 | 165 (+25) | 165 (+25) |
Class 2 | 215 (+25) | 455 (+25) |
Class 3 | 265 (+25) | 710 (+25) |
Class 4 | Exceeding Class 3 limits | |
BS Class 1 judge standard:
①. During six pcs samples, the sample that biggest “1.5 minutes
flame spread value” and “last
flame spread value”, shall not exceed the max allowance (that is
the sum of internal and external
value)
②. The “1.5 minutes flame spread value” and “last flame spread
value” of another five pcs
samples should not exceed standard value (that is the external
value)
Part 6: Fire propagation
①. Test method: measure temperature change (heating) by
thermocouple sensor through
sealing space when burning sample.
②. Observe data: the temperature is measured every 30 seconds
within 0-3 minutes ignition; the
temperature is measured every 1 minute within 4-10 minutes
ignition; the temperature is
measured every 2 minute within 12-20 minutes ignition, and only
measure 3 times.
③. Judgment method:
S1 = S2 = S3 =
S = S1 + S2+ S3
t----- time, in minutes, 0 when ignition
--sample temperature, in ℃, on time t
---standard temperature, in ℃, on time t
BS Class 0 judgment standard: Class 1 material total index S is not
more than 12; the first
sub-index is not more than 6, which could be determined as Class 0.
Environmental conditions:
1. Ground level, well ventilated, non-flammable, explosive,
corrosive gases and dust.
2. There is no strong source of electromagnetic radiation nearby.
3. Leave adequate space around the equipment for maintenance.
4. Temperature: 5 ℃ ~ 30 ℃.
5. Pressure: 86 ~ 106kpa.
6. AC3800V / 50HZ.
7. Fluctuation range: 380V ± 10%.
8. Frequency fluctuation range allowed: 50Hz ± 1%.
9. The user is required to configure the device with the
appropriate capacity of air and power
switches at the installation site, and the equipment must
independently and exclusively use this
switch.
10. If the equipment is not working, the ambient temperature should
be maintained within 0 ~
45 ℃
Parameter:
Model | YYF053 |
Firebrick max temperature | 2500℃ |
Measuring range | ≤1300 ℃ |
Diameter | 406mm |
Test furnace size | L9456*W1067*H1400 |
