Abstract: Corrosion is one of main factors that make buried gas pipeline leak and burst. In this paper, based on the systems analysis of corrosive failure factors of buried gas pipeline, the fault tree of corrosive failure of buried gas pipeline was forward. In addition, on the basis of the theory of corrosion of gas pipeline and the theory of the fault tree fuzzy analysis, factors of corrosive failure of buried gas pipeline were analyzed and each order minimum set was obtained. Finally, some key factors in corrosive failure of buried gas pipeline was also gotten. A practical example indicated that the method is so flexible and adaptive that it is more corresponded to engineering practice and further to improve the traditional fault tree analysis method.

Key words: buried gas pipeline, corrosion failure, fault tree, fuzzy analysis