Steam traps Thermodynamic
8
Pressure/temperature limits (ISO 6552) - Flanged ASME
Pressure psi g
0
290
580
870 1160
1450
C
A
D
B
450 400 300 200 100 0
32 212 392 572 752 842
Flanged: ASME Class 150 ASME Class 300 ASME Class 600
Steam saturation curve
C
B
D
0
20
40
60
80
99.3
Pressure bar g
The product must not be used in this region or beyond the parameter of the PMA or TMA of the relative end connection.
Body design conditions
ASME Class 600
PMA Maximum allowable pressure TMA Maximum allowable temperature
99.3 bar g @ 38 °C 1440 psi g @ 100 °F
450 °C @ 54.8 bar g
842 °F @ 795 psi g
Minimum allowable temperature
-50 °C
-58 °F
PMO Maximum operating pressure TMO Maximum operating temperature Minimum operating temperature Minimum operating pressure Maximum operating backpressure
46 bar g
667 psi g
A - B - B ASME 600
450 °C @ 46 bar g
842 °F @ 667 psi g
0 °C
32 °F
1.5 bar g
22 psi g
80% of the upstream pressure
5.7.45
Product is safe for use under full vacuum conditions Designed for a maximum cold hydraulic pressure of:
149 bar g
2161 psi g
Body design conditions
ASME Class 300 719 psi g @ 100 °F 842 °F @ 397 psi g
PMA Maximum allowable pressure TMA Maximum allowable temperature
49.6 bar g @ 38 °C 450 °C @ 27.4 bar g
Minimum allowable temperature
-50 °C
-58 °F
PMO Maximum operating pressure for saturated steam service
33 bar g
479 psi g
A - C - C ASME 300
TMO Maximum operating temperature Minimum operating temperature Minimum operating pressure Maximum operating backpressure
450 °C @ 27.4 bar g
842 °F @ 397 psi g
8.7 70
0 °C
32 °F
1.5 bar g
22 psi g
80% of the upstream pressure
Product is safe for use under full vacuum conditions Designed for a maximum cold hydraulic pressure of:
74.4 bar g
1079 psi g
Body design conditions
ASME Class 150
PMA Maximum allowable pressure TMA Maximum allowable temperature
19 bar g @ 38 °C 450 °C @ 4.6 bar g
276 psi g @ 100 °F 842 °F @ 67 psi g
Minimum allowable temperature
-50 °C
-58 °F
PMO Maximum operating pressure for saturated steam service
14 bar g
203 psi g
A - D - D ASME 150
TMO Maximum operating temperature Minimum operating temperature Minimum operating pressure Maximum operating backpressure
450 °C @ 4.6 bar g
842 °F @ 67 psi g
0 °C
32 °F
1.5 bar g
22 psi g
80% of the upstream pressure
Product is safe for use under full vacuum conditions Designed for a maximum cold hydraulic pressure of:
28.5 bar g
22 psi g
TI-P187-02 CMGT Issue 11
Page 4 of 7
TDS46M Thermodynamic Steam Trap with Maintainable Seat
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