CIPP Lining The thermosetting sheaths best known with their English name Cured in Place Pipe (CIPP) and the related technologies without excavation are used for the restoration of sewage pipes, rainwater discharge pipes, aqueducts and pressure pipes in general as well as any pipe or network used for transporting water, gas and wastewater. Their priority field of application ranges from 80 to 2000 mm in diameter and a wide range of circular and non-circular tubes (including ovoid ones). Once polymerised, the liner forms a new tube inside the existing one, without joints.