49 CFR 192.123 - Design limitations for plastic pipe.
Title 49: TransportationSubtitle B: Other Regulations Relating to Transportation (Continued) CHAPTER I: PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) SUBCHAPTER D: PIPELINE SAFETY PART 192: TRANSPORTATION OF NATURAL AND OTHER GAS BY PIPELINE: MINIMUM FEDERAL SAFETY STANDARDS Subpart C: Pipe Design 192.123 - Design limitations for plastic pipe. (a) Except as provided in paragraph (e) and paragraph (f) of this section, the design pressure may not exceed a gauge pressure of 100 psig (689 kPa) 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 ?F (?20 ?C), or ?40 ?F (?40 ?C) if all pipe and pipeline components whose operating temperature will be below ?29 ?C (?20 ?F) have a 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 HDB used in the design formula under ? 192.121 is determined. (ii) For reinforced thermosetting plastic pipe, 150 ?F (66 ?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:
|Nominal size in inches (millimeters).||Minimum wall thickness 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)|