49 CFR 192.115 - Temperature derating factor (T) for steel pipe.

Regulations last checked for updates: May 02, 2025

Title 49 - Transportation last revised: Mar 20, 2025

View all text of Subpart C [§ 192.101 - § 192.127]

§ 192.115 - Temperature derating factor (T) for steel pipe.

The temperature derating factor to be used in the design formula in § 192.105 is determined as follows:

Gas temperature in degrees Fahrenheit (Celsius)	Temperature derating factor (T)
250 °F (121 °C) or less	1.000
300 °F (149 °C)	0.967
350 °F (177 °C)	0.933
400 °F (204 °C)	0.900
450 °F (232 °C)	0.867

For intermediate gas temperatures, the derating factor is determined by interpolation. [35 FR 13257, Aug. 19, 1970, as amended by Amdt. 192-85, 63 FR 37502, July 13, 1998]

authority: 30 U.S.C. 185(w)(3), 49 U.S.C. 5103,60101

source: 35 FR 13257, Aug. 19, 1970, unless otherwise noted.

cite as: 49 CFR 192.115