Risk Analysis, Gas and Oil Leakages

摘要

In the process train of offshore production installations, leakages from flanges and gaskets are belived to be one of the most significant contributors to the overall risk. The potential hazards from leakages are fires and explosions. Based on failure frequency data for the connections, comparative risk analysis were to be carried out to show the risk contribution from the different connection methods. The performed analysis has shown, however, that the available failure data for mechanical components in offshore use have a low quality and are consequently a limiting factor for comparing different designs and construction solutions with respect to reliability. In addition to the need for improved data it should be recognized that, in order to reach a more presice conclusion concerning the ranking of different methods for mechanical connections in the process trains, a cost benefit analysis including the maintenance aspects as well as the reliability aspect has to be performed. With the assumptions made for the consequence chains following the leakage/rupture, it is found that the different ventilation system designs may have substantial influence on the risk connected to leakage and rupture in a module on an offshore oil/gas production platform. It is, however, difficult with a reasonable confidence to present a ranking between the different ventilation systems because each des. (ERA citation 08:033143)