Hawaii Administrative Rules
Title 6 - DEPARTMENT OF BUDGET AND FINANCE
Division - PUBLIC UTILITIES COMMISSION
Chapter 77 - TRANSPORTATION OF NATURAL AND OTHER GAS BY PIPELINE; MINIMUM SAFETY STANDARDS
Subchapter 5 - MINIMUM SAFETY STANDARDS - PIPE DESIGN
Section 6-77-38 - Design limitations for plastic pipe
Universal Citation: HI Admin Rules 6-77-38
Current through August, 2024
(a) The design pressure may not exceed a gauge pressure of 689 kPa (100 p.s.i.g.) for plastic pipe used in:
(1) Distribution systems;
or
(2) Class 3 and 4
locations.
(b) Plastic pipe may not be used where operating temperatures of the pipe will be:
(1) Below minus 29E C (-20E F); or
(2) In the case of thermoplastic pipe, above
the temperature at which the long-term hydrostatic strength used in the design
formula under §6 77-34 is determined, except that pipe manufactured before
May 18, 1978, may be used at temperatures up to 38E C (100E F); or in the case
of reinforced thermosetting plastic pipe, above 66E C (150E F).
(c) The wall thickness for thermoplastic pipe may not be less than 1.57 millimeters (0.062 in.).
(d) The wall thickness for reinforced thermosetting plastic pipe may not be less than that listed in the following table:
| Nominal size in inches | Minimum wall thickness in millimeters (inches) |
| 2....................................... | | 1.52(0.060) |
| 3.......................................| | 1.52(0.060) |
| 4....................................... | | 1.78(0.070) |
| 6....................................... | | 2.54(0.100) I |
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