The discussion revolves around the potential implications of replacing a 2-kilometre section of an 80mm asbestos water main with a 150mm PVC pipe, particularly concerning pressure breaks in the remaining old asbestos pipe. The focus includes considerations of pressure dynamics, historical ruptures, and the condition of the old infrastructure.
Participants express uncertainty regarding the effects of the new pipe on the old pipe's integrity, with no consensus reached on whether the increased pressure could lead to further ruptures.
The discussion highlights limitations in available data regarding the historical performance of the old pipe under varying flow conditions and the specific soil conditions affecting its stability.
The old pipe has ruptured many times over the last year with the head pressure being constant with the low flow rate due to its age and deterioration, although the new larger diameter pipe has not been connected yet, it was just my thought that the old pipe would not handle the pressure once it was ?.insightful said:If you're asking whether the reduced pressure drop in the new PVC pipe will increase the pressure in the old pipe enough to rupture it, it's hard to say. Did the replaced old pipe rupture? Was the remaining old pipe commonly subjected to the 50m head when flow was low?
But has the remaining old pipe ever ruptured? Maybe it's lying in more stable soil. Anyway, I'd hope the replacement of the remaining old pipe is "in the works" awaiting funding.Breakorburst said:The old pipe has ruptured many times over the last year with the head pressure being constant with the low flow rate due to its age and deterioration, although the new larger diameter pipe has not been connected yet, it was just my thought that the old pipe would not handle the pressure once it was ?.