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Trenchless Automated Leakage Repair (TALR)

Curapipe’s patented Trenchless Automated Leakage Repair (TALR) is an internal pipeline leakage repair solution for multiple leaks in water distribution networks. TALR is especially suited for pipelines with substantial leakage from multiple sources of leaks. For example, these sources could be externally corrosion-induced pinholes, lead-run cast iron joints, longitudinal cracks in PVC pipes and in ferrous pipes caused by hoop stress, split bell caused by transverse stresses on the pipe joint, circumferential breaks due to longitudinal thermal contraction, displaced ‘O’ rings on PVC joints, failed welds on MDPE joints and leaky service connections.

TALR is suitable for a wide range of pipe materials. As a stand-alone system, once launched into the treated pipe section it self-detects water leaks and automatically seals and cures them. An isolated pipe section of mains and service pipes is a requirement. Actual levels of leakage are measured before and after the repair.

TALR is a solution for rapid bulk reduction of unsustainable leakage levels. It is an addition to ongoing active leakage management services (i.e. “find & fix”) and works well with installed network pressure reduction systems.

Key Performance Features

  • Seals a variety of leak types both on water mains and connected service pipes.

  • Meets stringent health requirements for products that come into contact with drinking water.

  • Rapid deployment at a low cost.

  • 75% reduction of overall leakage.

  • Long-term cure


Mode of Operation

  1. A PIG train is launched into an isolated treated section of the water distribution network via an upstream fire hydrant or hot tap.

  2. The PIG train contains a “compartment” consisting of Curapipe’s unique viscous curing substance wedged between two PIGs.

  3. The substance operates under pressure and automatically detects and seals multiple leaky pinholes, joints, fittings and service connections.

  4. The PIG train is typically extracted through a downstream fire hydrant.

  5. The substance within the leakage area hardens and leaks are permanently cured.

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