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An Overview of the Pipeline Defect Assessment Manual

Lookup NU author(s): Paul Hopkins


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The integrity of oil and gas transmission pipelines is now the subject of new regulations, codes and standards in the USA and elsewhere. A key element of pipeline integrity and these new initiatives is the evaluation of defects that inevitably occur over the lifetime of a pipeline; therefore, assessment methods are needed to determine the severity of defects when they are detected in pipelines. The past 40 years has seen the development of a number of methods for assessing the significance of defects. Some of these methods have been incorporated into industry guidance, others are to be found in the published literature. However, there is no definitive guidance that compares the assessment methods, or assesses each method against the published test data, or recommends best practice in their application. To address this industry need, a Joint Industry Project has been sponsored by sixteen international oil and gas companies to develop a Pipeline Defect Assessment Manual (PDAM). PDAM documents the best available techniques currently available for the assessment of pipeline defects (corrosion, dents, gouges, weld defects, etc.) in a simple and easy-to-use manual, and gives guidance in their use. PDAM is based on an extensive critical review of pipeline ‘fitness-for-purpose’ methods and published test data. The PDAM is now in use, but it is also being updated by the sponsors. This paper presents an overview of PDAM, and describes some of its novel features.

Publication metadata

Author(s): Cosham A, Hopkins P

Publication type: Conference Proceedings (inc. Abstract)

Conference Name: Pipeline Technology Conference

Year of Conference: 2004

Publisher: Scientific Surveys, UK

Series Editor(s): Scientific Surveys, UK