[Code of Federal Regulations]
[Title 49, Volume 3]
[Revised as of October1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR192.123]

[Page 38-39]
 
                        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. 192.123  Design limitations for plastic pipe.

    (a) The design pressure may not exceed a gauge pressure of 689 kPa 
(100 psig) for plastic pipe used in:
    (1) Distribution systems; or
    (2) Classes 3 and 4 locations.
    (b) Plastic pipe may not be used where operating temperatures of the 
pipe will be:
    (1) Below -20 deg.F (-20 deg.C), or -40 deg.F (-40 deg.C) if all 
pipe and pipeline components whose operating temperature will be below -
29 deg.C (-20 deg.F) have a

[[Page 39]]

temperature rating by the manufacturer consistent with that operating 
temperature; or
    (2) Above the following applicable temperatures:
    (i) For thermoplastic pipe, the temperature at which the long-term 
hydrostatic strength used in the design formula under Sec. 192.121 is 
determined. However, if the pipe was manufactured before May 18, 1978 
and its long-term hydrostatic strength was determined at 73 deg.F 
(23 deg.C), it may be used at temperatures up to 100 deg.F (38 deg.C).
    (ii) For reinforced thermosetting plastic pipe, 150 deg.F 
(66 deg.C).
    (c) The wall thickness for thermoplastic pipe may not be less than 
0.062 inches (1.57 millimeters).
    (d) The wall thickness for reinforced thermosetting plastic pipe may 
not be less than that listed in the following table:

------------------------------------------------------------------------
                                                           Minimum wall
                                                             thickness
          Nominal size in inches (millimeters).               inches
                                                          (millimeters).
------------------------------------------------------------------------
2 (51)..................................................   0.060 (1.52)
3 (76)..................................................   0.060 (1.52)
4 (102).................................................   0.070 (1.78)
6 (152).................................................   0.100 (2.54)
------------------------------------------------------------------------


[35 FR 13257, Aug. 19, 1970, as amended by Amdt. 192-31, 43 FR 13883, 
Apr. 3, 1978; Amdt. 192-78, 61 FR 28783, June 6, 1996; Amdt. 192-85, 63 
FR 37502, July 13, 1998]