Regulationhistorical
49 CFR 192.115
Temperature derating factor ( T ) for steel pipe.
Snapshot 2025-10-01 Government source
eCFR editorial compilationAuthoritative but unofficial
View source 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]