Section 6-77-160 - Change in class location: required studyWhenever an increase in population density indicates a change in class location for a segment of an existing steel pipeline operating at hoop stress that is more than forty percent of SMYS; or indicates that the hoop stress corresponding to the established maximum allowable operating pressure for a segment of existing pipeline is not commensurate with the present class location, the operator shall immediately make a study to determine:
(1) The present class location for the segment involved;(2) The design, construction, and testing procedures followed in the original construction, and a comparison of these procedures with those required for the present class location by the applicable provisions of this chapter;(3) The physical condition of the segment of the extent it can be ascertained from available records;(4) The operating and maintenance history of the segment;(5) The maximum actual operating pressure and the corresponding hoop stress, taking pressure gradient into account, for the segment of pipeline involved; and(6) The actual area affected by the population density increase, and physical barriers or other factors which may limit further expansion of the more densely populated area.[Eff ] (Auth: HRS § 269-6) (Imp: 49 C.F.R. §192.609, OCT 1, 1990)