The use of trenchless pipeline installation technology is expected to grow as the need to rehabilitate or replace existing sewer and water pipeline infrastructure increases in importance.
For rehabilitation of our cities aging pipelines located in densely urbanised areas, trenchless PVC technologies make it possible to restore the structural integrity and fluid velocity of the pipeline whilst minimising the financial and social costs.
The PVC pipe industry has developed solutions for the common types of trenchless installations including Sliplining, Horizontal Directional Drilling (HDD), Pipe Bursting, Tight Fit Structural Liner, Jacking and Microtunnelling. Some of these technologies are well established and have been successfully used for many years. In more recent times, the development of restraint joint systems such as Bulldog Restraint System, Certa-Lok and TerraBrute as well as Fusible PVC™ pipe has significantly widened the range of PVC options. To date, whilst New Zealand has successfully installed a number of Fusible PVC™ projects, none of these technologies have been installed in Australia, though this will hopefully change in the near future. Technologies that have been successfully used include jacking pipe, spiral winding profile, fold and form and segmental lining pipe.
The properties and versatility of PVC allow it to be used for a wider range of solutions for trenchless installations than any other material. The advantages of PVC include strength, light weight, hydraulic capacity, crack resistant flexibility, corrosion resistance, chemical resistance including resistance to hydrocarbon permeation, maintainability and environmental performance.
This flexibility and versatility will see the use of PVC expand in this increasingly important sector for the plastic pipes industry. The range of physical properties attainable through formulating and variety of joining techniques allow PVC to have the widest range of options for trenchless pipeline installations of any pipe material.