49 CFR § 192.115 - Temperature derating factor () for steel pipe.
---
identifier: "/us/cfr/t49/s192.115"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "49 CFR § 192.115 - Temperature derating factor () for steel pipe."
title_number: 49
title_name: "Transportation"
section_number: "192.115"
section_name: "Temperature derating factor () for steel pipe."
chapter_name: "PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
subchapter_number: "D"
subchapter_name: "PIPELINE SAFETY"
part_number: "192"
part_name: "TRANSPORTATION OF NATURAL AND OTHER GAS BY PIPELINE: MINIMUM FEDERAL SAFETY STANDARDS"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "30 U.S.C. 185(w)(3), 49 U.S.C. 5103, 60101 and 49 CFR 1.97."
regulatory_source: "35 FR 13257, Aug. 19, 1970, unless otherwise noted."
cfr_part: "192"
---
# 192.115 Temperature derating factor () for steel pipe.
The temperature derating factor to be used in the design formula in § 192.105 is determined as follows:
| Gas temperature in degreesFahrenheit (Celsius) | Temperaturederating 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]