According to the management and scheduled inspection of pressure vessels and piping in sulfur recovery unit, it described the evaluation of the failure probability and consequences of pressure vessels and piping by the Risk Based Inspection (RBI). This article focuses on the practical application process of RBI to the Sulfur Recovery Unit. Together with the production crafts and loop medium in pressure vessels and pipes, we could dig out high risk equipment and its’ reasons, therefore, suggest possible precautions. Further precautions will be provided for equipment manufacturers to assure production safety through personal experiential analysis and comparison with the similar product from the aspect of failure mechanism and position. It is aimed to explore the combined method of RBI and personal experiential analysis and it’s practical application.

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