Pressure - Temperature Ratings - Siemens SITRANS FC430 Operating Instructions Manual

Technical data

13.8 Pressure - temperature ratings

13.8 Pressure - temperature ratings
Pressure - temperature ratings are determined by process connection material and
applicable standards. The tables below detail the allowed maximum process pressure for
sensor variants with stainless steel and Hastelloy measuring tubes.
With two major exceptions, the pressure rating of the flow sensors is independent of the
process medium temperature. Design rules for flange connections in both the EN1092-1 and
ASME B16.5 standards dictate pressure derating with increasing temperature. The charts
below show the effect of process medium temperature on the pressure ratings for the
flanges within the product program.
Figure 13-1
Figure 13-2
Table 13- 14 EN1092-1 [bar]
PN (bar)
16
40
63
100
160
198
Metric flange ratings, EN 1092-1 (P: Process pressure; T: Process temperature)
ANSI flange ratings, ASME B16.5 (P: Process pressure; T: Process temperature)
-50 0
16.0 16.0
40.0 40.0
63.0 63.0
100.0 100.0
100.0 100.0
Temperature TS (°C)
50 100
16.0 15.2
40.0 37.9
63.0 59.7
100.0 94.8
100.0 100.0
Operating Instructions, 05/2015, A5E03361511-AF
150 200
13.8 12.7
34.5 31.8
54.3 50.1
86.2 79.5
100.0 100.0
FC430 with HART