Pipeline ancillaries Sight glasses
10
Pressure/temperature limits
A
Steam saturation curve
C
B
Pressure bar g
The product must not be used in this region.
A - B Flanged EN 1092 PN25 A - C Flanged BS 1560 ASME (ANSI) Class 150
Body design conditions
PN25 and ASME (ANSI) 150
PN25
25 bar g @ 100 °C
PMA Maximum allowable pressure
ASME 150
17.2 bar g @ 35 °C
PN25 280°C @ 18 bar g ASME 150 280°C @ 10 bar g
TMA Maximum allowable temperature
Minimum allowable temperature
-10 °C
PN25
21 bar g
PMO Maximum operating pressure for saturated steam service
ASME 150
13.8 bar g
TMO Maximum operating temperature
280 °C
Minimum operating temperature Note: For lower temperatures consult Spirax Sarco.
0 °C
PN25
38 bar g
Designed for a maximum cold hydraulic test pressure of:
ASME 150
30 bar g
7.8.15
PN25
21 bar g
PTMX Maximum test pressure (steam service)
ASME 150
13.8 bar g
10.8 14
TI-P130-01 CMGT Issue 11
Page 2 of 4
SG253 Sight Glass
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