Welcome to the ‘Pipeline Defect Assessment Manual’ (PDAM) website. This website gives you information about PDAM: its history; content; sponsors; and how to become a member of the group who sponsor PDAM. PDAM is a 473-page engineering manual that details the ‘best practices’ in pipeline defect assessment, and provides users with detailed procedures, methods and equations for the assessment of defects such as corrosion, gouges and dents.