ADVERTORIAL: PROJECT
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Trenchless plumbing results in low noise and
emissions when fixing burst pipes.
Trenchless technologies offer minimal
interference with existing infrastructure.
Trenchless pipe replacement reduces
intervention in landscapes and protected areas.
Trenchless technologies require smaller
construction sites, which helps to protect
vegetation and native animal species.
Trenchless methods are sustainable and use
existing infrastructure.
HOW THE SYSTEM WORKS
Firstly, the existing pipeline is decommissioned, and the
site is set up. Small construction pits are erected at the
start and end of the pipeline that is being rehabilitated.
The existing pipeline is then emptied and cut. With the
help of a mobile TV camera, the condition of the pipe
is inspected across its entire length. A rope connection
is created between the two construction pits to create
a system that feeds the Primus Line hose through the
existing pipeline. At one end, a pulling head attaches
to Primus Line, which is fed from a transport drum
carrying the coiled and folded hose.
This is connected to a feeder cable that guides Primus
Line into the construction pit using deflection rollers.
From there, Primus Line is fed into the existing pipeline.
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An annulus sits between Primus Line and the host
pipe to ensure the high-pressure hydraulic hose is
self-supported as it is inserted. Once in place, the rope
connections are removed from the Primus Line hose.
Primus Line is then connected to the host pipe using a
unique, high-pressure connector.
Compressed air is applied to Primus Line and a resin
is injected through a valve on the external sleeve. The
pressure forces the steel sleeve and Primus Line into the
contours of the connector core for a durable, pull-proof
connection. A leak test is performed to ensure that the
pressure-resistant seal is complete. Finally, a fitting piece
is inserted before reconnecting the renovated pipeline
to the network. Depending on the project requirements,
the Primus Line hose can be fitted with either a flange or
welded ends. This makes it possible to connect bends,
T-joints, or other fittings and fixtures, regardless of the
materials from which they are made.
The entire project took only three days to complete
in August 2017, with a happy client after completion.
Since the installation of Primus Liner repairs, savings of
up to 84.87% of water at ATE have been realised. PA
www.plumbingafrica.co.za
1. End cap with bypass for compressor, used to
inflate liner from pre-folded U-shape to its
natural round shape.
2. Low-pressure flanged Primus connector,
used at liner end, enables easy connection
to existing pipes or spool pieces.
3. ‘Window’ cut in existing water line to see
pre-folded liner installation — for training and
display purposes.
Rescue Rod’s Primus Line
was used to rehabilitate the
pipeline without obstructing
traffic at the busy factory.
May 2018 Volume 24 I Number 3