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

Temp,
Deg 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