Internal corrosion has long been of major concern to pipeline owners, having spent millions of dollars and countless man-hours combating its destructive effects. Pipeline failures, due to internal corrosion, have produced environmental and legal issues that have resulted in huge fines and judgements, creating even greater concerns about its ambiguous nature. Over the years, a number of technologies have been introduced to deal with the variety of corrosion problems that exist in oilfield pipelines. One such option is a 50 year old technology known as in-situ coating. The in-situ coating process is a relatively simple procedure, whereas, the internal pipe wall is thoroughly cleaned, either
by means of abrasive blasting or by a system that combines progressive pigging and chemical cleaning. This is then followed by the application of several coats of a suitable protective coating. The most common coating used is typically a high performance epoxy. The process is unique, whereas, pipeline pigs, instead of conventional spray equipment apply the coating. The objective of this paper is to address the overall process of in-situ coating, which includes; cleaning options and effectiveness, coating selection and application, its limitations and residual benefits and the pipeline owners or operators involvement.