What is the maximum length of Duraliner installed between access pits?
That really depends on a number of factors such as how straight the existing host pipe is laid, the diameter of the host pipe and the wall thickness of the Duraliner starting stock (which is determined by the operating pressures of the system), and the capacity of the equipment available. To date the longest run in commercial service is in the 700 foot range. Duraliner expansion equipment as presently sized was intended for the “city block” length of about 500ft. In most projects, fitting location, pit access points, valve location, etc. are the limiting factors as to how long of a run can be expanded.
