Structural Analysis of Gas Pipeline Repaired by Carbon Fiber Composite Materials

Abstract

-Composite repair methods besides welding methods such as surfacing and sleeve welding have been used as repair of damaged gas pipelines in foreign countries. Importance of safety management of city gas pipelines have been emphasized recently and our own repair manuals and codes for repair of city gas pipelines are required. It is right time to conduct research on the composite repair methods since the composite repair was introduced rather recently compared to the welding repair methods which have been investigated for long time. In this study, as a starting point of safety assessment of gas pipeline repaird by composite materials, structural analysis of gas pipeline repaired by carbon fiber composite materials was conducted using finite element analysis(FEA) method and the results was discussed.

Research on the Performance of a New External Occlusion Device for Pressure Vessel Leakage

“…The system can remotely control and isolate the pipeline with fluid medium [11]. The intelligent intube occlusion developed by Bowie is composed of a traction unit, a plugging unit, and a braking unit, which has the advantages of a simple structure [12]. Due to the different physical and chemical properties of materials and various leakage modes, there are many unforeseen technical problems in the emergency treatment and disposal of leakage accidents at this stage [13] and [14].…”