Haw. Code R. § 6-77-68 - Protection against accidental overpressuring
(a)
General requirements. Except as provided in section 6-77-69, each pipeline that
is connected to a gas source so that the maximum allowable operating pressure
could be exceeded as the result of pressure control failure or of some other
type of failure, must have pressure relieving or pressure limiting devices that
meet the requirements of sections 6-77-70 and 6-77-71.
(b) Additional requirements for distribution
systems. Each distribution system that is supplied from a source of gas that is
at a higher pressure than the maximum allowable operating pressure for the
system must:
(1) Have pressure regulation
devices capable of meeting the pressure, load, and other service conditions
that will be experienced in normal operation of the system, and that could be
activated in the event of failure of some portion of the system; and
(2) Be designed so as to prevent accidental
overpressuring.
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