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FC7x0
Operating conditions
Density of gases
Rather than being measured directly, density of gas is usually calculated using its
reference density, process fluid temperature and process pressure.
9.1.3 Pressure
The maximum allowed process pressure depends on the selected process connection
and process temperature.
The given process temperature and process pressure ranges are calculated and
approved without corrosion or erosion effects.
The following diagrams shows the process pressure as a function of process temperature
as well as the process connection used (type and size of process connection).
Calculations for ASME flanges are based on ASME B16.5 Material group 2.2 (316/316L
dual certified).
ASME class 150, EN PN16
Fig. 13: Allowed process pressure as a function of process connection temperature
1
2
3
38 / 180
p in bar
(psi)
20 (290)
18 (261)
16 (232)
14 (203)
12 (174)
10.5 (152)
10 (145)
8.4 (122)
8 (116)
6 (87)
4 (58)
2 (29)
0
-50
0
(-58)
(32)
(122)
-70
38
(-94)
(100)
Process connection compatible to ASME B16.5 class 150
Heat tracing connection compatible to ASME B16.5 class 150
Process connection compatible to EN 1092-1 PN16
A5E52748387-AA, 2023/09
50
100
150
200
(212)
(302)
(392)
Process conditions
3
1
2
250
300
350
T in °C
(482)
(572)
(662)
(°F)
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