Ameron Saudi Arabia, Ltd.
has the complete facilities to do cement-mortar lining by spraying method,
in-plant and in-situ, for both new pipes and existing pipelines for
S p e c i f i c a t i o n s
Pipe Size Ranges:
4" to 22" (100mm to 550mm)
using remote-controlled machine
24" to 60" (600mm to 1500mm)
using man-operated machine
In-plant -- up to 16 meters
In-situ (in-field) -- up to
300 meters in one run
In accordance with American
Water Works Association -- AWWA C602 and AWWA C-205.
In-situ lining method is
done by hauling the machine with constant speed through the pipe and the
mortar is spinned against the inner pipe surface by an electric-driven,
fast-rotating centrifugal discharge head. The rotating trowels
mounted on axially aligned arms behind the centrifugal head are pressed
with a certain spring tension against the mortar surface granting a smooth
The service lines for
electricity and mortar are pulled through the pipeline by means of a winch
whose speed is adapted to the operating speed of the lining machine.
The otherwise automatic operations performed inside the pipeline are
monitored by a machine operator.
The electric propelled
lining machine mounted on pneumatic tyres passes (at constant speed)
through the pipe at (a constant speed).
The lining machine is
equipped with a funnel-shaped hopper serving as intermediate storage for
the cement-mortar pumped through the pumping hose towards the machine.
A conveyor screw then forces a constant amount of mortar from the hopper
to the centrifugal head. (Consequently), the selected
traveling speed of the machine determines (in consequence) the thickness
of the layer.
with cement mortar
different strains to which underground drinking-water pipelines made of cast
iron, steel or asbestos cement are exposed demands regular inspection and
ongoing maintenance. Yet even optimum servicing may not prevent corrosion,
incrustation and pitting. The consequences are water pollution and capacity
losses, with the risk of pipe fracture rising parallel with running costs.
Relaying may solve the problem -- but this solution is generally expensive
and in all events space-and time-consuming.
versatile, efficient and economical method of pipeline refurbishment, lining
with cement mortar by the projection method represents the state of the art
worldwide. This technology was spearheaded in the USA, where a machine
which applied cement mortar uniformly and fully mechanically to the inside
walls of the pipes by means of a centrifugal head rotating at high speed was
demonstrated in the 1930's. This techniques was originally confined to
large-diameter pipes, but machines designed for lining pipes with smaller
diameter to 80mm were gradually developed.