Session: 03-04-01 Advancements in Pipeline Remediation Solutions and Coatings

Paper Number: 86912

86912 - Preparation and Performance Evaluation of Erosion Resistant Lining of Bimetallic Composite Pipeline 

Erosion widely exists in oil and gas production and transmission pipelines, which seriously affects the service life of pipelines. Bimetallic composite pipeline, including outer layer and inner layer, is formed by two different metals through a variety of processing technologies, which has the advantage that a single material does not have. The service life of bimetallic composite pipeline can be 4-6 times longer than that of traditional carbon steel pipeline, and the cost is relatively low, which has good economy. Therefore, it is more and more widely used in oil and gas production and transportation. However, the common problem of bimetal mechanical composite pipeline is the separation of inner layer and outer layer due to insufficient bonding force. The main problem of bimetallic metallurgical composite pipeline is that the bonding interface of composite pipeline is not fully bonded and there has gaps. When subjected to external load, it will lead to stress concentration at the bonding interface, resulting in the reduction of the service life of the pipeline. In this paper, the inner lining of bimetallic composite pipeline was prepared by electromagnetic heating. The prepared bimetallic composite pipeline was processed into a standard tensile sample, and the tensile test was carried out at the joint surface of the outer pipeline and the inner lining with a tensile testing machine. The erosion experiments of bimetallic composite pipeline and outer pipeline were carried out under the same experimental conditions. The tensile fracture and erosion failure morphology were observed and analyzed by scanning electron microscope, and its erosion resistance was evaluated. The results show that the mechanical properties of the joint surface of bimetallic composite pipeline prepared by electromagnetic heating method are better than those prepared by mechanical method. SEM shows that the outer layer and the inner layer penetrated and contacted well at the joint surface. The erosion test shows that the erosion resistance of the bimetallic composite pipeline is greatly improved compared with the outer pipe. Therefore, bimetallic composite pipeline is expected to replace traditional carbon steel pipeline in actual oil and gas production and transportation, and has broad prospects in future application.

Presenting Author: Jianwei Dong China University of Petroleum-Beijing

Presenting Author Biography: Dong Jianwei is a doctoral student in China University of Petroleum-Beijing. The research direction is pipeline erosion wear.