Page 7 - BuTech - Technical information

PRESSURE VS TEMPERATURE RATING CURVES

Example: Determine the pressure rating of a 1/4" 30UV valve constructed of Hastelloy C276 with an operat-
o
ing temperature of 600 F.
From the Material vs Pressure Rating chart on page Tech-4, the maximum pressure rating for a 30UV valve
constructed of Hastelloy C276 would be 21,000 PSI at room temperature.
o
Turn to the Pressure vs Temperature rating curves on pages Tech-6 and Tech-7. Find 600 F on the X-axis of
the Hastelloy C-276 chart. Follow the line up to read a value of 95%. Multiplying the room temperature rating by
this reduction factor (21,000 x .95) yields a rating of 19,950 PSI at 600 F.
o

Monel 400 Super Duplex 2507

100 100
90
90
% of Rated Pressure @ Design Temperature 70 % of Rated Pressure @ Design Temperature 70
80
80

60
60
50
50
40
40
30
20
20
10
10 30
0 0
100 200 300 400 500 600 700 800 900 1000 1100 1200 100 200 300 400 500 600 700 800 900 1000 1100 1200
(38) (93) (149) (204) (260) (315) (371) (426) (482) (537) (593) (649) (38) (93) (149) (204) (260) (315) (371) (426) (482) (537) (593) (649)
Temperature ˚F Temperature ˚F
(˚C) (˚C)

Titanium 6AL4V

100

90
% of Rated Pressure @ Design Temperature 70
80

60
50
40

30
20
10

0
100 200 300 400 500 600 700 800 900 1000 1100 1200
(38) (93) (149) (204) (260) (315) (371) (426) (482) (537) (593) (649)
Temperature ˚F
(˚C)

Tech-09 Page Tech-7

2121 EBCO Drive, Suite 1 • Erie, PA 16506 USA • Ph: (814) 833-4904 • Fax: (814) 833-2612 • E-mail: hq@butech-valve.com