These services include asset condition assessment systems (CCTV, Laser and Sonar) and pipeline rehabilitation systems for pressure and gravity pipelines from 150 mm to 3000 mm in diameter, in most materials and shapes (circular, oviform, box sections, etc). Rehabilitation systems include CIPP, Grundoburst Pipebursting, Panel Lok spiral liners, Sliplining and chemical resistant coatings.

On a recent project Tyco Water conducted an internal survey of approximately 6.5 km of an 1890s 1225 mm wrought iron water main from Chullora to Croydon in Sydney using a combination of CCTV and Laser profiling technologies.

The reason for the project was to provide advice on the condition of the pipe, minimum profiles and the location of bends, valves, etc to provide advice to contractors who were tendering for the insertion of a new pipe in this section of pipeline, as part of a larger project.

Due to the size of the pipe, the potential for flooded sections, inadequate lighting and ventilation, the number of break-ins required, and isolations non man-entry survey was ruled out. Tyco had the CCTV capability with its large steerable mainline system, having 650 m of cable, and laser profiling capability for these large pipelines.

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The surveys were conducted from seven entry locations (approximately 800 m apart). The CCTV camera had the laser attachment mounted on the CCTV tractor. The procedure was to CCTV the pipeline as far as possible (often the limit of the survey was determined by water or tight bends). Once the limit of the survey was reached, the tractor was reversed and laser profiling carried out to the entry location – the equipment was removed and reinserted in the opposite direction enabling a maximum of 800 m of pipeline to be surveyed from one entry location.

CCTV was recorded in mpeg format direct to DVD. Analysis of laser profiling was carried out and a report of the pipes condition, ovality and alignment was compiled for the customer.

Reports were provided showing the minimum and maximum diameters for each of the 25 profiles recorded per second. This is displayed as a percentage change from the expected internal diameter versus distance in the pipe.

A number of report templates are available to advise the asset owner of the shape and condition of the pipeline. This technology is particularly useful for large conduits where man-entry survey is not possible, such as large sewer conduits which cannot be isolated, or large pressure mains, where the risk is too high for man-entry inspection.

For further details on CCTV, Laser or Sonar pipeline inspections, or pipe line rehabilitation, please contact Tyco Water Pipeline Services on (02) 9612 2444.

Tyco Water conducted an internal survey of approximately 6.5 km of an 1890s 1225 mm wrought iron water main from Chullora to Croydon in Sydney using a combination of CCTV and Laser profiling technologies.