L52328 Composite Repair of Mechanically-Damaged Pipes

Abstract

Composite materials continue to gain wider acceptance in the pipeline industry for repairing a range of pipeline anomalies. This success is due in large part to two factors. The first contributor is the execution of comprehensive research programs such as the first PRCI MATR-3-3, State of the Art Assessment of Composite Repair Systems and this second program contained herein focused on evaluating composite materials to repair damaged pipelines. The second factor associated with the widespread use of composite materials is the successful two-decade history that composite materials have had in repairing pipelines. While there have been a few unfortunate incidents in the field (primarily related to poor installation), composite materials have proven themselves to be well suited for repairing high pressure gas and liquid pipelines. The need existed for a set of integrity assessment procedures and guidelines to ensure proper use and application of composite repair materials for mechanically-damaged pipes. The results of this program indicate that when properly designed and installed, composite repair systems are able to restore integrity to mechanically-damaged pipes to a state that makes them fit for continued use at their normal design conditions. When composite materials are used for repairs, whether the repair involves corrosion, dents, or other anomalies, an integrity assessment should be completed. The integrity assessment procedures and guidelines presented in this report include an estimate of the future operating conditions to ensure that the design is adequate for the intended service.