There exist a number of published sources in the public domain where generic pipeline failure data consolidated for various types of oil and gas pipeline applications can be obtained. The main challenge of using these generic failure databases is to make reasonable estimates of the reduction factors applied in frequency calculation to reflect the specific design of the pipeline. An inappropriately chosen reduction factor can result in overestimation or underestimation of risk arising from the pipeline. It can also causes difficulties to pipeline designers in justifying pipeline integrity. Using PD8010: Part 3, detailed analysis of the historical pipeline failure data were carried out and the contribution from each design parameter was analysed. This provides a realistic approach to calculate the extent of risk reduction from each of the design parameters. Such an approach allows the pipeline operator and designer to make or support decisions on additional mitigation measures that may be necessary to fulfil safety and compliance requirements. Furthermore, it can be used as an input in cost estimation during the early stages of the project.

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