Omega Liner Method for Rehabilitation of Pipelines Using Rigid Polyvinyl Chloride Pipes

A rigid polyvinyl chloride pipe with shape memory properties folded in an omega (Ω) shape is rapidly restored to a circular form by heating it within an existing pipe, thereby constructing a self-supporting pipe.

A rigid polyvinyl chloride pipe with shape memory performance, pre-folded into a ω shape at the factory, is pulled into the existing pipe and restored to a circular shape by heating with steam. It is then closely adhered to the existing pipe using compressed air to construct a strong self-supporting pipe. Since the liner material is a polyvinyl chloride pipe with shape memory performance, there are no chemical reactions on-site, allowing for safe construction. **Features** - Short construction time (restores to a circular shape quickly with just heating). - Consistent quality due to factory production. (Manufactured at a factory certified by the Japan Sewage Works Association and registered as Class II materials) - High seismic resistance recognized through construction technology review certification for compatibility with existing pipes. - Rehabilitates as a self-supporting PVC pipe with excellent strength, durability, corrosion resistance, and hydraulic properties. - Enables shortening of construction periods and cost reduction. - A safe construction method that does not use organic solvents, eliminating concerns about odors or fire hazards. - Follows the bends and steps of existing pipes without wrinkles, allowing for rehabilitation of only the installation pipe. **Applications** - Reconstruction and extension of the lifespan of aging or damaged sewer pipes (Ø150 to 450) - Strength restoration - Improvement of water-tightness against infiltrating water, flow characteristics, corrosion resistance, prevention of root intrusion, and seismic resistance.

Sewerage facilities