Study On Damage Detection Of Anticorrosive Coating For Deep Buried Oil And Gas Pipeline

Pipeline transportation plays an important role in economic construction and national defense industry,because of its unique advantages in oil and gas transportation.Pipeline transportation has gradually become the lifeblood of modern industry and national economy.But at the same time of bringing convenience to people,some of the external anticorrosive coating of large buried pipelines with long service time may have defects and damages,or even leakage due to various reasons.In the long run,it will bring adverse consequences to the safe,efficient and continuous transportation of pipelines,while in severe cases,it will lead to various explosion accidents,resulting in huge economic losses and environmental pollution.Therefore,it is urgent to detect and protect the anticorrosive coating of deep buried pipeline.Generally,the buried depth of transportation pipeline is relatively small,most of the inspectors have a specific and in-depth understanding and research on the shallow pipeline detection,and carry out experimental tests and develop corresponding detection equipment according to its engineering conditions,while the research on the detection of large buried pipeline is less,and there is no clear and full understanding and cognition.This paper mainly focuses on the research on the detection of the damage of the anticorrosive coating of the deep buried pipeline,introduces some common methods of the detection of the pipeline,expounds the problems existing in the detection of the deep buried pipeline,and understands the change law of the damage of the anticorrosive coating of the deep buried pipeline through the theoretical research and simulation analysis of the electromagnetic wave attenuation.Then,Comsol finite element simulation software is used to establish the corresponding three-dimensional simulation model of buried pipeline,and the damage detection of the simulated pipeline anti-corrosion coating is studied.The simulation detection is carried out under the condition of the same buried depth,whether the anticorrosive coating is damaged or not,and the specific change of the detection signal is compared.Then the corresponding results of different buried depth,different damaged area of anticorrosive coating and different frequency are obtained through the analysis of the simulation model.