HAR 6-77-167
HAR 6-77-167 Maximum allowable operating pressure: high-pressure distribution systems
(a)No person may operate a segment of a high pressure distribution system at a pressure that exceeds the lowest of the following pressures, as applicable:#
(1)The design pressure of the weakest element in the segment, determined in accordance with subchapters 5 and 6;#
(2)60 p.s.i.g., for a segment of a distribution system otherwise designed to operate at over 60 p.s.i.g., unless the service lines in the segment are equipped with service regulators or other pressure limiting devices in series that meet the requirements of section 6-77-69(c);#
(3)25 p.s.i.g. in segments of cast iron pipe in which there are unreinforced bell and spigot joints;#
(4)The pressure limits to which a joint could be subjected without the possibility of its parting;#
(5)The pressure determined by the operator to be the maximum safe pressure after considering the history of the segment, particularly known corrosion and the actual operating pressures.#
(b)No person may operate a segment of pipeline to which subsection#
(a)(5)applies, unless overpressure protective devices are installed on the segment in a manner that will prevent the maximum allowable operating pressure from being exceeded, in accordance with section 6-77-68. [Eff ] (Auth: HRS '269-6) (Imp: 49#