[Code of Federal Regulations]
[Title 49, Volume 3]
[Revised as of October 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR192.115]

[Page 41]
 
                        TITLE 49--TRANSPORTATION
 
 CHAPTER I--RESEARCH AND SPECIAL PROGRAMS ADMINISTRATION, DEPARTMENT OF 
                       TRANSPORTATION (CONTINUED)
 
PART 192_TRANSPORTATION OF NATURAL AND OTHER GAS BY PIPELINE: MINIMUM 
FEDERAL SAFETY STANDARDS--Table of Contents
 
                          Subpart C_Pipe Design
 
Sec. 192.115  Temperature derating factor (T) for steel pipe.

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

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