Table 11: FM-200® Weight Calculations Imperial
Table 12: Altitude Correction Factor
At elevations above sea-level, FM-200
®
has a greater
specific volume because of the reduced atmospheric
pressure�� A system designed for sea-level conditions will
therefore develop an actual higher concentration at levels
above sea-level and an actual lower concentration at levels
below sea-level�� The adjusted agent quantity is calculated
by multiplying W (from the equation on the left) by the
altitude correction factor�� The design quantity of the
clean agent shall be adjusted to compensate for ambient
pressure that vary more than 11 percent (equivalent to
approximately 915 m (3000 ft) of elevation change) from
standard sea level pressure 760 mm Hg at 0 °C (29��92 in
Hg at 70 °F)��
(BS5306-5��1 / NPFA2001 Table 3-6)
4
SECTION 4 - FLOW CALCULATIONS
FM-200® (UL/FM)
14A-07H
02
2010-03
Temp Specific
Vapor
Volume
Weight Requirements of Hazard Volume, W/V (lb/ft
3
)
Design Concentration (% per volume)
6.4
7
7.17
8
9
10
11
12
13
14
15
t
(°F)
c
s
(ft³/lb)
d
10
1.924
0.034
0.0391
0.0401
0.041
0.013
0.07
0.042
0.070
0.077
0.04
0.091
20
1.973
0.034
0.031
0.0391
0.0441
0.001
0.03
0.02
0.091
0.077
0.02
0.094
30
2.0210
0.033
0.0372
0.032
0.0430
0.049
0.00
0.012
0.07
0.0739
0.00
0.073
40
2.07
0.0330
0.034
0.0373
0.0421
0.047
0.037
0.09
0.09
0.0723
0.077
0.03
0
2.114
0.0323
0.03
0.03
0.0411
0.04
0.02
0.04
0.04
0.0707
0.0770
0.03
0
2.112
0.031
0.034
0.037
0.0402
0.04
0.014
0.072
0.031
0.091
0.073
0.017
70
2.207
0.0310
0.0341
0.0349
0.0394
0.044
0.003
0.0
0.01
0.077
0.0737
0.0799
0
2.23
0.0303
0.0334
0.0342
0.03
0.0439
0.0493
0.04
0.00
0.03
0.0722
0.073
90
2.2994
0.0297
0.0327
0.033
0.037
0.0430
0.043
0.03
0.093
0.00
0.070
0.077
100
2.342
0.0292
0.0321
0.0329
0.0371
0.0422
0.0474
0.027
0.01
0.037
0.094
0.072
110
2.3912
0.02
0.031
0.0323
0.034
0.0414
0.04
0.017
0.070
0.02
0.01
0.073
120
2.43
0.021
0.0309
0.031
0.037
0.040
0.04
0.007
0.00
0.013
0.0
0.0724
130
2.420
0.027
0.0303
0.0311
0.030
0.039
0.044
0.049
0.049
0.002
0.0
0.0711
140
2.72
0.0270
0.029
0.030
0.0344
0.0391
0.0440
0.049
0.040
0.091
0.044
0.09
Altitude above
sea-level
Correction
Factor
ft
(km)
-3000
(-0.92)
1.11
-2000
(-0.1)
1.07
-1000
(-0.30)
1.04
0
(0.00)
1.00
1000
(0.30)
0.9
2000
(0.1)
0.93
3000
(0.91)
0.9
4000
(1.22)
0.
000
(1.2)
0.2
000
(1.3)
0.7
7000
(2.13)
0.7
000
(2.4)
0.72
9000
(2.74)
0.9
10000
(3.0)
0.
