Abstract
Numerous pipeline failures have occurred due to the drastic increase in oil and gas product distribution pipelines over the last three decades. Corrosion is a significant factor in the failure of offshore gas pipelines. It is necessary to maintain the integrity of the offshore transmission system, one of which is the riser, for the product to be adequately distributed. The purpose of this study is to ensure the riser's reliability by conducting a risk assessment of the probability and consequences of equipment failure, mitigating the impact of failure risk, and developing a more optimal inspection plan. The API 5L Grade X60 gas riser pipe is the subject of this study. The quantitative Risk-Based Inspection (RBI) technique was used in 2016 following the API 581 standard. This quantitative approach is founded on a numerical value model constructed using validated operational data and inspection results. The risk assessment indicates that the gas riser pipelines will have a high-risk level (5D) for the splash zone segment and a medium-risk level (2D) for the above-and below-water segments. The recommended inspection plan for the gas riser pipeline is one year after the risk-based inspection assessment.
Highlights
Since the 1950s, pipelines have been one of the most practical, cost-effective, and safe methods of transporting large volumes of oil and gas over long distances between platforms
The results indicated that the gas riser pipelines risk value was medium-risk for the above-and below-water segments but high-risk for the splash zone segment
The research is focused on the Riser export of PT XYZ, which is connected to the subsea gas pipeline at an offshore facility
Summary
Since the 1950s, pipelines have been one of the most practical, cost-effective, and safe methods of transporting large volumes of oil and gas over long distances between platforms. There has been a drastic increase in the installation of pipelines to distribute oil and gas over the last three decades [1]–[3]. Corrosion is the most significant percentage contributor to failure in offshore gas pipelines [5]. The system of offshore pipelines is known as a subsea flowline which describes the transmission of underwater pipelines to carry gas products from offshore platforms to onshore facilities [6], [7]. Companies need to make sure proper distribution of products by maintaining the integrity of equipment, some of which is located in offshore facilities. A risk assessment technique that can be used is the risk-based inception (RBI) method
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