Recent Advances in the Analysis, Measurement, and Properties …
209
Table 3 Average heat fluxes
at different locations over the
sample area
Location
Distance, x,
mm(in.)
Averaging time
(s)
Average heat
flux (kW/m 2 )
1
0.0 (0.0)
65–85
166
2
12.7 (0.5)
86–105
165
3
25.4 (1.0)
106–125
162
4
38.1 (1.5)
126–145
164
5
50.8 (2.0)
146–165
160
6
76.2 (3.0)
166–185
148
7
101.6 (4.0)
186–205
135
8
127.0 (5.0)
206–225
106
Calibration Test
A test was performed with the instrumented steel plate only (no sample) to demonstrate that the setup meets the torch fire exposure requirements in 49 CFR 179,
Appendix B. In this calibration test, the steel plate was placed on top of the ceramic
board at the sample location, 8.89 cm (3.5 in.) above the jet burner exit. The plate
was exposed to the burner conditions for 30 min. The test specification requires
that two of the thermocouples on the unexposed side of the steel plate reach 427°C
(800°F) within 4.0 ± 0.5 min. Since this is a reduced scale test on smaller panels,
the requirement for the temperature rise was taken for only the center thermocouple
to reach the specified temperature rise in the allotted time.
The temperature rise of the plate is provided in Fig. 5 for thermocouples at the
center of the plate (Thermocouple 5) and the four locations closest to the jet. The
highest temperature is related to the thermocouple at the center of the plate where
the jet burner impinges on the plate. As can be seen in this figure, the temperature
reaches 427°C (800°F) at 4.42 min., which is within the time specified in the test
requirements specified in 49 CFR 179, Appendix B. After a 30 min. exposure, the
center temperature is 725°C (1337°F) while the other thermocouples were ranging
from 600 to 639°C (1112–1182°F).
Torch Fire Tests
Torch fire tests were performed on the two 30.2 cm × 30.2 cm S-S CMF panels.
The sample details are provided in Table 2. Each torch fire test was conducted with
the sample at an initial temperature between 0–37.8 °C (32–100°F) as required by
the test specification in 49 CFR 179, Appendix B. Prior to each test, the accurate
operation of each thermocouple was verified by heating it briefly with a torch. Each
test was video recorded with a view of the exposed sample surface to document
any changes in the sample during the test. A 30 s baseline of data was taken prior
209
Table 3 Average heat fluxes
at different locations over the
sample area
Location
Distance, x,
mm(in.)
Averaging time
(s)
Average heat
flux (kW/m 2 )
1
0.0 (0.0)
65–85
166
2
12.7 (0.5)
86–105
165
3
25.4 (1.0)
106–125
162
4
38.1 (1.5)
126–145
164
5
50.8 (2.0)
146–165
160
6
76.2 (3.0)
166–185
148
7
101.6 (4.0)
186–205
135
8
127.0 (5.0)
206–225
106
Calibration Test
A test was performed with the instrumented steel plate only (no sample) to demonstrate that the setup meets the torch fire exposure requirements in 49 CFR 179,
Appendix B. In this calibration test, the steel plate was placed on top of the ceramic
board at the sample location, 8.89 cm (3.5 in.) above the jet burner exit. The plate
was exposed to the burner conditions for 30 min. The test specification requires
that two of the thermocouples on the unexposed side of the steel plate reach 427°C
(800°F) within 4.0 ± 0.5 min. Since this is a reduced scale test on smaller panels,
the requirement for the temperature rise was taken for only the center thermocouple
to reach the specified temperature rise in the allotted time.
The temperature rise of the plate is provided in Fig. 5 for thermocouples at the
center of the plate (Thermocouple 5) and the four locations closest to the jet. The
highest temperature is related to the thermocouple at the center of the plate where
the jet burner impinges on the plate. As can be seen in this figure, the temperature
reaches 427°C (800°F) at 4.42 min., which is within the time specified in the test
requirements specified in 49 CFR 179, Appendix B. After a 30 min. exposure, the
center temperature is 725°C (1337°F) while the other thermocouples were ranging
from 600 to 639°C (1112–1182°F).
Torch Fire Tests
Torch fire tests were performed on the two 30.2 cm × 30.2 cm S-S CMF panels.
The sample details are provided in Table 2. Each torch fire test was conducted with
the sample at an initial temperature between 0–37.8 °C (32–100°F) as required by
the test specification in 49 CFR 179, Appendix B. Prior to each test, the accurate
operation of each thermocouple was verified by heating it briefly with a torch. Each
test was video recorded with a view of the exposed sample surface to document
any changes in the sample during the test. A 30 s baseline of data was taken prior