This is the preferred lining medium specified by designers for potable water services. The system offers an appropriate balance between performance and economic considerations with respect to corrosion, wear protection, ease of installation and final cost.

Hall Longmore has in-house drag trowel facilities for pipe diameters ranging from 200 mm to 660 mm nominal bore. Mortar mix is pumped into the pipe and distributed evenly to the internal circumference by means of a cone shaped vibrating trowel. The trowel is drawn through the pipe with an electric winch during the process.

Lining Capability: Ø200 mm to Ø2100 mm

The centrifugal spinning method is used to line pipes from 711 mm to 2100 mm NB. The Hall Longmore process positions pipe on 3 rotating belts which allows pipe to spin unencumbered by fixed wheels or rotators. The mortar mix is pumped into the pipe through a boom which is gradually withdrawn. Lining thickness is governed by the rate of pumping over the speed at which the boom is withdrawn. Mix batching and placement is computer controlled.

Manufacturing Process