Abstract
Corrosion defects, also called metal loss due to corrosion, are frequently found in carbon steel pipelines. Corrosion defects may occur singly or in colonies. Usually the failure pressure of a colony of closely spaced corrosion defects is smaller than the failure pressures that the defects would attain if they were isolated. This reduction in the corroded pipe pressure strength is due to the interaction between adjacent defects. The interaction of corrosion defects in pipelines is the subject of two companion papers. In the present paper (the Part 1 paper) a literature review and the fundamentals of interaction of corrosion defects in pipelines are presented. In the subsequent paper (the Part 2 paper) initially the database of corroded pipe tests generated during the MTI JIP is described. Then the failure pressures contained in the MTI JIP database of corroded pipe tests are compared with those predicted by six of the currently available assessment methods. MTI JIP is the acronym for Mixed Type Interaction Joint Industry Project.
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