Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
REPAIR OF TROUGH CORROSION DAMAGE IN PIPELINES WITH METALLIC PATCHES BONDED WITH ADHESIVES
Submission Author:
Heraldo da Costa Mattos , RJ , Brazil
Co-Authors:
Fernanda Félix Enne, João Marciano Laredo dos Reis, Heraldo da Costa Mattos
Presenter: Heraldo da Costa Mattos
doi://10.26678/ABCM.COBEM2019.COB2019-0744
Abstract
The present paper is concerned with the repair of through-wall corrosion damage in metallic pipes using a bonded metallic patch. The focus is on the analysis of the influence of the thickness of the patch on the effectiveness of the repair. The goal is to assure that the pipe won’t leak once the repair is completed. The main motivation for the study presented on this paper is the corrosion damage in produced water pipelines used in offshore oil exploitation. Since offshore platforms are hydrocarbon atmospheres, any repair method using equipment that may produce heat and/or sparkling is forbidden. Usually a composite sleeve is used combined with a metallic patch. The main motivation for this study is to show that only a bonded metallic patch can be sufficient to avoid leaking (no composite sleeve is necessary), but the effectiveness of the repair is strongly dependent on the thickness. Normally, most studies are concerned with the bonded area, but experimental results show that the failure pressure using patches with the same area but with different thicknesses can be very different. Burst tests have been performed on API 5L grB steel hydrostatic specimens with a 25,4 mm hole repaired with 100 mm X 100 mm patches. Depending on the thickness, the failure pressure can vary from 70 to 270 bar.
Keywords
metallic patches, Adhesives, pipeline repair
