Metal hose, when temperature increases, working pressure decreases

When ambient temperature increases, the pressure a flexible metal hose assembly withstand decreases. Elevated is one of the factors that cause the loss of working pressures. Tables below assist you with calculating the safe working pressure at high temperatures with welded or mechanically attachments.

Temperature Correction Factors
Temp (°F) Temp (°C) 304, 316L
Stainless
321
Stainless
Bronze Monel Hastelloy Inconel
Room Room 1 1 1 1 1 1
150 65 0.96 0.97 0.92 0.93 0.97 0.99
200 93 0.92 0.94 0.89 0.9 0.94 0.98
250 121 0.91 0.92 0.86 0.87 0.92 0.97
300 149 0.86 0.88 0.83 0.83 0.91 0.97
350 177 0.85 0.86 0.81 0.82 0.89 0.96
400 204 0.82 0.83 0.78 0.79 0.87 0.95
450 232 0.8 0.81 0.75 0.77 0.86 0.94
500 260 0.77 0.78 0.73 0.85 0.94
600 316 0.73 0.74 0.72 0.84 0.92
700 371 0.69 0.7 0.71 0.82 0.9
800 427 0.64 0.66 0.7 0.81 0.89
900 482 0.62 0.79 0.87
1000 538 0.6 0.78 0.86
1100 593 0.58 0.75 0.84
1200 649 0.55 0.73 0.82
1300 704 0.5 0.69 0.79
1400 760 0.44 0.65 0.77
1500 815 0.4 0.74

 

Saturated Steam Pressure To Temperature (PSIG)
Saturated Steam (PSIG) Temp (°F) Saturated Steam (PSIG) Temp (°F) Saturated Steam (PSIG) Temp (°F) Saturated Steam (PSIG) Temp (°F)
0 212 150 366 450 460 29.84 20
10 238 175 377 475 465 29.74 32
20 259 200 388 500 470 29.67 40
30 274 225 397 550 480 29.39 60
40 287 250 406 600 489 28.89 80
50 298 275 414 700 505 27.99 100
60 307 300 422 800 520 26.48 120
75 320 325 429 900 534 24.04 140
80 324 350 436 1000 546 20.27 160
90 331 375 442 1250 574 15.2 180
100 338 400 448 1500 606 6.46 200
125 353 425 454 2500 669    

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