Rehabilitation of Corrosion Protective Coatings on Buried Steel Pipelines

Large oil- and gas-pipeline-networks have been installed with diverse coating systems over the last 50 years. The rehabilitation of those pipelines - and their corrosion protective coatings - has now become a topical challenge. Different advanced materials have been used for rehabilitation of pipe coatings since the beginning of 1929. The experiences are as versatile as the products being used - petrolatum, bitumen, coal tar, sintering processes, PE/Butyl tapes, FBE, liquid coatings and shrink sleeves. In the following a short overview of coating materials to be recently rehabilitated and the respective solution will be presented. Special focus will be laid on the newly designed tape system DENSOLEN® AS50/R20HT by DENSO.