Repair systems are used to address localised service problems or structural defects within a pipeline.
The methods of localised repairs can be grouped as stabilisation or structural repair systems. The following sections describe a number of repair systems using trenchless technologies.
In general, a stabilisation technique will address a localised problem, such as infiltration, without adding to the structural integrity of the pipeline.
Typically, stabilisation techniques include chemical stabilisation, joint sealing and resin injection although in some circumstances the latter can also be classed as a structural repair. By definition, a defect addressed by a structural repair method will improve the structural integrity of a pipeline.
Typical structural repair techniques include CIPP patch repair, robotic repairs and pipe re-rounding