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Products > In-Situ Cement-Mortar Lining

 
 

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 rehabilitation.

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

Pipe Length:

  • In-plant -- up to 16 meters
  • In-situ (in-field) -- up to 300 meters in one run

Standards: 

  • In accordance with American Water Works Association -- AWWA C602 and        AWWA C-205.

Lining Process

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 finish.

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.

Pipe refurbishment

 with cement mortar

The many 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.

As a 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.

 

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