New Developments in Pipeline Rehabilitation Technology

The use of no-dig rehabilitation techniques has become of increasing interest and importance over the past two decades in countries and industries with deteriorating pipeline infrastructures. Rehabilitation techniques in general offer pipeline operators a cost-effective alternative to complete pipeline replacement which may be either significantly more costly, or impracticable, or both. The technology has developed in direct response to the changing technical, economic and indeed social issues facing utilities. This paper examines the development and use of two close-fit PE lining techniques developed to meet the needs of the water and gas industries (Rolldown and Subline), and also epoxy resin lining.