Pipeline Rehabilitation

REPLACEMENT OF EXISTING PIPELINE BY MEANS OF PIPE BURSTING

Pipeline rehabilitation is the process of restoring and improving the condition of existing pipelines through various trenchless techniques to extend their lifespan and enhance their performance without the need for conventional open trench pipe replacement.

PIPE
BURSTING

Pipe bursting is a trenchless method used for both size-for-size pipeline replacement and increasing the existing pipeline size by fragmenting the old pipe while simultaneously pulling in a new, larger pipe, all without the need for open trenches.

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PIPE REAMING / PIPE EATING

Pipe reaming is a trenchless method that involves enlarging an existing pipeline's diameter by using a cutting tool or reamer to remove the inner wall of the old pipe while simultaneously installing a new, larger pipe in its place, eliminating the need for extensive excavation. The pipe reaming process is ideal for the replacement of large diameter pipelines or when a big upsize is required.

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NON-DESTRUCTIVE PIPELINE REHABILITATION

SPIRALLY
WOUND PIPE

Spirally wound pipe is a trenchless pipe lining technique where a continuous strip of PVC or HDPE profile is helically wound inside a deteriorated host pipe, creating a new structural liner that reinforces and seals the existing pipe.

Trenchless Technologies is the licensed installer of the Sekisui Ribloc spirally wound trenchless solutions, these include:

• EX – produces a close-fit uPVC liner in diameters from 150 mm to 750 mm. The liner is wound through the host pipe at a smaller diameter and then radially expanded into intimate contact.
• RO – produces a close-fit uPVC liner in diameters from 800 mm to 1800 mm. The Rotaloc machine traverse the host pipe and installs a liner intimate with the pipe wall. The Rotaloc machine adjusts diameter to negotiate line conditions.
• ROS - produces a close-fit uPVC liner in diameters from 800 mm to 1800 mm. The liner is re-enforced with steel encapsulation to offer enhanced stiffness and performance.
• PE – produces a fixed diameter, fully welded, steel reinforced HDPE liner in diameters from 300 mm to 3000 mm

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SLIP LINING

Slip lining is a trenchless pipe rehabilitation method where a new HDPE pipe (smaller than the existing pipe diameter) is inserted into an existing damaged or deteriorated pipe to improve its structural integrity and flow capacity.

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CURED-IN-PLACE PIPE (CIPP)

Cured-In-Place Pipe (CIPP) is a trenchless pipe lining technique where a flexible liner saturated with resin is inserted into a damaged pipeline, and once cured, it forms a seamless, durable, and rehabilitated inner pipe surface.

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PULL-IN FLEXIBLE LINERS

A reinforced fabric hose is pulled into the existing pipelines whilst in a folded configuration. Once inserted, the hose is pressurised and forms a tight fit within the existing pipeline. The reinforced fabric hose liner provides greatly improved burst performance of the rehabilitated pipeline and eliminates leaks. It is specifically designed for water mains and other pressurised pipeline applications.

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JOINT SEALING

Large diameter joint sealing for trenchless pipeline rehabilitation involves the application of specialized sealing materials and techniques to repair and reinforce joints in large-diameter pipelines without the need for excavation, ensuring a watertight and structurally sound system.

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