Technical Information - Temperature Derating

Temperature Derating

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.

Temperature in Degrees F	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