Pipeline teleinspection undertaken with the help of a colour video camera could provide with adequate information on the pipeline condition. This technique allows the detection of small cracks and leakage points, blockages and intrusions. It locates the exact place and character of the damage, identifies the condition of the nearby area which provides with appropriate basis for decision on whether the damage could be locally repaired or the pipeline section should be removed altogether. So the detection and sealing of leakages could be undertaken without long distance digging works. Additionally correct detection provides with exact local excavation of the identified site.

Local repair of pipelines

If a damage locates in a pipeline section that is difficult to access, then it could be eliminated by applying in-pipe bandages that is installed with the help of a robot. The robot's usage obviates the need for excavating works on major highways, tram or railway lines, main streets and squares of the city. The robot is inserted into the pipeline at a suitable place (a manhole or such like), goes to inaccessible from above damaged site and fulfils the repair works.

TV-inspection-inspection of sewage mains

Teleinspection can be applied for discovering defects of and repair works on sewage pipelines:

• Identification of destructions in the pipe roof of big-size sewage mains and prevention of depressions and potholes on the roads and in the residential areas;
• Revelation of potential blockages in the mains for timely cleaning works and prevention of sewage spills onto the streets;
• Identification of pipeline junction cracks and sewage pipe destruction for prevention of rainfall infiltration into the sewage mains and subsequent overcharge of purification facilities.

Water wells teleinspection

If a water well has a depressed water discharge rate or low quality of water, teleinspection of the well could save time and money by providing reliable technical data for a reasoned decision on either well reworking or its closure.

TV-inspection at the commencement of water, sewage, central heating and gas utilities pipelines

At the commencement of construction works, teleinspection allows for detection of intrusions and gravel in the commenced pipeline, quality check of the pipe joints, etc. thus providing with higher degree of quality, durability and operational characteristics of new pipelines.

Apart from that teleinspection is intended as a means of revelation of buried wells and determination of pipeline scheme for the purpose of reconstructing lost schemes of infrastructure lines or finding illegal in-cuts as well as increasing budgetary revenues at the expense of unaccounted users of mains.

Additionally, teleinspection could save budgetary funds due to reasoned decision on excluding repair works on pipeline sections that are in a robust condition because it provides with reliable evaluation of the pipeline condition as well as identification of the parts that need urgent repair.

Teleinspection of pipelines, chimneys, airways and other engineering structures.

Teleinspection of small diameter pipelines, chimneys, airways and other structures could be exercised by Portable Push-Up Systems that are available for inspection of pipelines from 35mm and more.

Teleinspection and local repair works during trenchless rehabilitation

If a trenchless pipeline rehabilitation is planned (pipe jacking, Phoenix technique, U-liner technology, grouting, etc.), CCTV robots are available for various purposes:

• CCTV inspection before the renovation allows identification of pipeline condition and decision on adequate repair technique (replacement, local repair or trenchless renovation);
• In-pipe cutting works eliminate intrusions or other sticking-out elements, mill out burrs on welded seams, etc.;
• Reopening of laterals after a pipe has been relined;
• Teleinspection allows for revelating defects after the renovation has been completed as well as establishing conformity of works quality and amount with the terms of the contract.

New developments and joint projects

• Pressing of spigot-and-faucet joints during pipeline construction
• Electromagnetic flaw detection of steel pipes
• Grouting injection system
• Polyethylene pipes lining system
• Pipeline cleaning technique