Damage Tolerance Testing of Small-Diameter Pipelines

摘要

Internal and external corrosion, as well as third-party damage such as dents and gouges, are the main causes of pipeline failures worldwide. When such damage is detected by direct inspection, or in-line inspection methods, a decision to replace, repair, or accept and monitor must be made. Over the past few decades, extensive experimental, analytical and numerical work has been undertaken to assess the severity of the different damage types and to quantify their impact on pipeline design and remaining life. This work has resulted in the development of methods such as ASME B31G, modified ASME B31G and DNVGL-RP-F101 for assessing the remaining strength of corrosion damage, the NG-18 equation for assessing the remaining strength of a gouge defect, and the empirical limits that are recommended by EPRG for assessing dent damage.