7. Corrosion Protection Practices and Integrity Management Challenges in Oil and Gas Pipeline

The present chapter has presented the root causes and contributing causes of the corrosion in the internal and external surfaces of the underground pipelines and their possible mitigation measures. External coating types, application methods, corrosion monitoring principles, and pipeline health assessment practices are discussed. The external surface is in contact with verities of terrain and corroding environment as it passes through long distances and is therefore vulnerable to greater challenges of pipeline surface corrosion. The internal corrosion rate is dependent on the corrosive properties of the crude oil, petroleum products, or gas being transported and the condition of the internal surface. The conditioning and preparation of the pipeline’s internal surface also help in reducing the drag. Any reduction in drag intern improves the flow rate of the service fluid in the pipeline.