Improved Risk Assessment of Pipeline Based on Fault Tree Quantitative Analysis

The fault tree of the pipeline was studied by investigating the failure modes and statistics of pipeline accidents of PetroChina. After a quantitative analysis of the impact factors for different failure modes, a Quantitative method for calculating the failure possibility of pipeline was established. The result was used to improve the most widespread pipeline risk assessment method - Kent scoring method. It can give comparable quantified description of the pipeline risk under current operation condition, and can give further support for decision-making of integrity management.