Corrosion integrity assessment is a process for improving pipeline safety. Its primary purpose is to prevent future corrosion damage. For accurate and correct application of this standard, the standard shall be used in its entirety. Using or referring to only specific paragraphs or sections may lead to misinterpretation and misapplication of the recommendations and practices contained herein. This standard provides the evaluation methodology, but does not designate practices for every specific or unique situation because of the complexity of conditions to which buried piping systems are exposed. This standard presents a methodology for the selection of integrity assessment methods for external corrosion, internal corrosion, and SCC on onshore ferrous pipelines carrying natural gas and hazardous liquids. This standard provides flexibility for the pipeline operator to tailor the corrosion integrity assessment method to specific pipeline situations. This methodology is a continuous improvement process. Through periodic successive assessments, the process should identify and address locations at which corrosion activity has occurred, is occurring, or may occur, and show the effectiveness of various mitigation programs.