Research On Ontology Safety Integration Test Method Of Buried Pipeline

With the acceleration of industrialization progress and promotion of energy structure optimization in our country, the long-distance buried pipeline, Especially in the oil refining enterprises, has undertaken vital transport task. But its working environment is relatively poor, there are more than 20% pipeline failure ratio due to corrosion, therefore it is necessary to grasp pipeline running state in time by NDT methods. The characteristic of pipeline body detection methods which are commonly used NDT methods are all point by point scanning, low efficiency, meanwhile the buying pattern of test equipment is imported from the advanced countries, and equipment dimension does not match part domestic buried pipeline. Therefore buried pipeline detection methods which are commonly used in our country are outside detection technique such as PCM, CIPS, DCVG, Although these methods have some advantages like high efficiency, low cost and mature application in our country, their test results can not support quantitative analysis to defect which makes it difficult to formulate maintenance and management strategy based on pipeline body through test result, this paper makes the following research work based on this background:(1) From the perspective of risk assessment, analyze needed test data types in defect evaluation module of two kinds of buried pipeline risk assessment methods commonly used, and analyze the characteristics of outside detection and inner detection. Through that, the establishment principles and implementation steps of integration test method are given, making guidance for later.(2) Setting up a long distance buried pipeline ontology integration testing system. This method is the combination of three test methods, namely, metal magnetic memory testing technology, acoustic emission testing technology and ultrasonic testing technology; By researching the detection mechanism of the three detection methods and analyzing their application examples, it has been established the test order and needed test results of each test method.(3) Designing a set of auxiliary excavation equipment. This equipment can realize through the soil and the anticorrosive layer outside pipeline ontology in a small area and make sure not undermining the pipeline ontology. The instrument can achieve the purpose that the pipeline ontology can be tested directly by using acoustic emission testing technology aided by wave-guiding rod.