To calculate a working pressure derated for elevated temperature, multiply the hose working pressure shown in the catalog by the appropriate derating factor below.

Note: The working pressure of an assembly at elevated temperatures may be affected by fitting type, material, and method of attachment.

 

Working Pressure Derating Factor

Temperature
in Degrees F
T304
T301*
T304L T316 T316L T321 T430 Copper C276 Monel 400
& C22
Inconel
600
Inconel
625
Carbon
Steel**
Alum. 3003
H14
100
200
300
400
500
1.0
1.0
1.0
0.94
0.88
1.0
1.0
1.0
0.93
0.86
1.0
1.0
1.0
0.97
0.90
1.0
1.0
1.0
0.93
0.86
1.0
1.0
1.0
1.0
0.96
1.0
1.0
0.98
0.96
0.95
1.0
0.80
0.78
0.50
0.13
1.00
1.00
1.00
1.00
0.99
1.0
0.88
0.82
0.79
0.79
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
0.97
1.00
1.00
1.00
1.00
0.95
1.0
1.0
0.64
0.34
600
650
700
750
0.82
0.81
0.80
0.78
0.81
0.79
0.77
0.75
0.85
0.84
0.82
0.81
0.81
0.79
0.77
0.75
0.91
0.89
0.87
0.86
0.93
0.91
0.88
0.86
0.93
0.90
0.88
0.86
0.79
0.79
0.79
0.79
1.0
1.0
1.0
1.0
0.95
0.94
0.93
0.93
0.87
0.85
0.83
0.65
800
850
900
950
0.76
0.75
0.73
0.72
0.74
0.72
0.71
0.69
0.80
0.79
0.78
0.77
0.74
0.72
0.71
0.69
0.84
0.84
0.83
0.81
0.82
0.52
0.49
0.43
0.84
0.83
0.82
0.81
0.79
0.79
0.76
0.71
1.0
0.99
0.95
0.95
0.93
0.93
0.93
0.93
0.54
0.44
0.33
0.23
1000
1050
1100
1150
0.69
0.61
0.49
0.39
0.67
0.65
0.61
0.53
0.77
0.73
0.62
0.49
0.67
0.65
0.61
0.52
0.81
0.70
0.55
0.41
0.32 0.80
0.68
0.55
0.47
0.48 0.42
0.27
0.20
0.93
0.93
0.69
0.57
1200
1250
1300
0.30
0.24
0.38
0.28
0.21
0.37
0.28
0.21
0.38
0.28
0.21
0.32
0.25
0.36
0.29
0.36
ASTM
Form
A269
Pipe
A269
Pipe
A269
Pipe
A269
Pipe
A312
Pipe
A268
Pipe
B68
Tube
B622
Pipe
B165
Pipe
B167
Pipe
B443
Pipe
A53
Pipe
B210
Pipe
*T301 is not listed in B31.1, but its tensile and yields are identical to T304 per ASM Metals Reference Book 3rd Ed. Pg 364
**Do not use for temperatures lower than 32°F