HAR 6-77-160
HAR 6-77-160 Change in class location: required study
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#