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Title: Rehabilitation of corroded steel pipelines with epoxy repair systems
Category: Technical papers from the Journal of Pipeline Engineering
Downloadable: Yes 
Project No.:
Research Agency:
Catalog No.: 2159s
Date of Publication: Mar 1 2009 12:00AM
Price: $25.00 US
Authors: H S Costa-Mattos, J M L Reis, R F Sampaio, and V A Perrut
Abstract: THE REHABILITATION OF corroded pipelines using epoxy repair systems is becoming a well-accepted engineering practice and an interesting alternative to the classic repair methods for metallic pipes in the oil industry, both saving time and allowing safer operation. In these repair systems, a pipe segment is reinforced by wrapping it with concentric coils of composite material after the application of epoxy filler at the corrosion defect. The technical specification ISO 24817 [1] gives requirements and recommendations for the qualification and design, installation, testing, and inspection for the external application of composite repairs to corroded or damaged pipework. Nevertheless, so far, composite repair systems are not totally effective for through-thickness corrosion defects because generally they cannot avoid leaking. The present paper presents a simple and systematic methodology for repairing leaking corrosion defects in metallic pipelines with epoxy resins. The focus is to ensure an adequate application of the epoxy filler such that the pipe will not leak after the repair. Such a procedure can be associated with a composite sleeve that will ensure a satisfactory level of structural integrity. Examples of repair systems in different damage situations are presented and analysed, showing the practical use of the proposed methodology.

References

1. ISO Technical Specification 24817, 2006. Petroleum, petrochemical and natural gas industries - composite repairs for pipework - qualification and design, installation, testing and inspection.
2. C.A.Jaske, B.O.Hart, and W.A.Bruce, 2006. Pipeline repair manual. Pipeline Research Council International, Inc. Virginia.
3. A.T.de Mello dos Santos, 2006. Simplified analysis of the caps influence in elasto-plastic pipe burst tests. MSc Thesis, Universidade Federal Fluminense, January.
4. H.Costa Mattos, R.F.Sampaio, J.M.L.Reis, and V.A.Perrut, 2007. Rehabilitation of corroded steel pipelines with epoxy repair systems. In: Solid mechanics in Brazil 2007, Eds M.Alves and H.S.da Costa Mattos, Brazilian Society of Mechanical Sciences and Engineering, ISBN 978-85-85769-30-7, pp485 – 496.
5. D.R.Stephens and R.B.Francini, 2000. A review and evaluation of remaining strength criteria for corrosion defects in transmission pipelines. ETCE2000/OGPT-10255, Proceedings of ETCE/OMAE2000 Joint Conference, Energy for the New Millenium, New Orleans, USA, 2000.

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