The Application Of Fuzzy Collocation Assessment Technique In Urban Natural Gas Pipelines Risk Assessment

With the development of some project, such as Trasport Gas From West To East, Transport Gas From Rusia To South of China, Import LNG, Gas Transport From Sea To Land, more and more cities will use natural gas.But with the development of city and the increment of population density that city construct,a great deal of gas pipelines is operating in cities wihich is a center of ecomomy and popularity. But the accidents, such as leakiness and burst of the natural gas pipelinest and in city usually will bring huge great damage for the city residents'life and properties and result in profound negative influence to the society. This article draws lessons from the domestic and international research result concerning the natural gas pipelines risk assessment, leads into the fuzzy mathematics theories and fuzzy collocation assessment technique, suggests the method of evaluation, based on Fuzzy collocation assessment and researchs the urban gas pipelines generally.(1) Given a complete evaluational indexing system and evaluation model to evaluate the urban gas pipelines risk assessment, based on Fuzzy collocation assessment technique.(2) Based on traditional terms of risk assessment, the third party detreuction, corrosion detreuction, design weakness and improper operation, another two terms, Transmission and Distribution station expiration and accident aftereffect are introduced into the urban gas pipelines risk assessment, which make the result more scientific and resonable.(3) The biggist problem lies in how to eliminate variation caused by estmators subjective consideration.This article combines efffctively the AHP and Fuzzy collocation assessment to provide a more effective,practical and scientific method for the urban gas pipelines risk assessment.