Structural Assessment and Rehabilitation of Energy Pipes with Wrinkle-Corrosion Defect

具有皱纹腐蚀缺陷的能源管道的结构评估与修复

• 批准号: RGPIN-2021-02508
• 负责人: Das, Sreekanta
• 金额: $ 2.62万
• 依托单位: University of Windsor
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=742022
• 关键词: Structural; Assessment; Rehabilitation; Energy; Pipes

The oil and gas industry adds about 8% of Canada's GDP and employ over 100,000 Canadians. Canada has the second-largest pipeline network in the world with over 830,000 km of pipelines which moves 99% of all the oil and gas that Canada produces. The majority of these pipelines are buried in the ground and hence, they are subjected to the corrosive environment of soil and complex loads resulting from the soil (ground) movements. The combined effect of the corrosive environment and loads cause the development of defects in the pipe wall such as corrosion and wrinkle. Corrosion causes a loss of pipe wall thickness and it is the most common defect found in buried pipelines. A wrinkle defect is an outward bulging in the pipe wall. These defects or a combination of these defects may cause the pipes to rupture, which would have far-reaching consequences. Depending on the service provided by a pipeline, oil or gas may be released, causing environmental damages, oil and gas supply interruption, property damages, health hazards, and even deaths. Previous research showed that the segment of pipeline that has developed a corrosion defect is also susceptible to the formation of a wrinkle defect within the corroded area when subjected to a ground movement and thus, the pipeline forms a combined wrinkle-corrosion defect. However, no previous researchers investigated the structural performance and safety of oil and gas pipe segments with a combined wrinkle-corrosion defect when it is stressed due to further ground movement and increased internal (operating) pressure. Hence, this NSERC research program is designed to undertake a detailed study to determine the structural performance and failure conditions of buried pipelines that have developed a combined wrinkle-corrosion defect. The outcomes of this research will immensely help the Canadian pipeline industry, engineers, and regulatory governmental bodies who will be able to correctly assess the possibility of ruptures when a combined wrinkle-corrosion defect has formed. Additionally, this NSERC research will also develop an easy-to-apply repair technique for wrinkle-corroded segments of buried pipelines. The repair technique will use flexible and noncorrosive fibre-based fabrics. The new repair technique will not require any welding or application of high heat and thus, this repair technique will not require a shutdown of the pipeline operation saving a significant amount of revenue for the pipeline industries and governments and avoiding interruption of oil and gas to our communities and industries. The goal of this research will be achieved through a large number of complex and time-consuming full-scale tests on oil and gas pipes. Additionally, computer simulations using a finite element program will be undertaken for better insight of the mechanics and reasons for the failures. Seven students will accomplish the research work under the supervision of Dr. S. Das at the University of Windsor.

石油和天然气行业增加了加拿大GDP的8％，并雇用了100,000多名加拿大人。加拿大拥有世界第二大管道网络，拥有超过830,000公里的管道，占加拿大生产的所有石油和天然气的99％。这些管道中的大多数被埋在地面上，因此，它们受到土壤（地面）运动产生的土壤和复杂负荷的腐蚀性环境。腐蚀环境和负载的综合作用会导致管壁中缺陷的发展，例如腐蚀和皱纹。腐蚀会导致管子壁厚的损失，这是埋入管道中最常见的缺陷。皱纹缺陷是管壁上的向外凸起。这些缺陷或这些缺陷的组合可能导致管道破裂，这将带来深远的后果。根据管道提供的服务，可能会释放石油或天然气，从而造成环境损失，石油和天然气供应中断，财产损害，健康危害甚至死亡。先前的研究表明，在经历地面运动时，腐蚀缺陷的管道段也容易受到腐蚀区域内皱纹缺陷的形成，因此，管道形成了合并的皱纹 - 腐蚀缺陷。但是，以前没有研究人员研究了由于进一步的地面运动和内部（操作）压力增加的压力，因此没有研究石油和天然气管段的结构性能和安全性。因此，该NSERC研究计划旨在进行一项详细的研究，以确定掩埋管道的结构性绩效和故障条件，这些管道已经形成了皱纹 - 腐蚀缺陷。这项研究的结果将极大地帮助加拿大管道行业，工程师和监管政府机构，他们将能够正确评估结合皱纹 - 腐败缺陷的可能性。 此外，这项NSERC研究还将开发出一种易于涂层管道的皱纹段的易于应用的维修技术。维修技术将使用柔性和非腐蚀性纤维的织物。新的维修技术将不需要任何高热量的焊接或应用，因此，该维修技术将不需要关闭管道操作，以节省管道行业和政府的大量收入，并避免向我们的社区和行业中断石油和天然气。 这项研究的目的将通过大量的复杂且耗时的全尺度测试来实现。此外，将进行使用有限元程序的计算机模拟，以更好地了解故障的机制和原因。七名学生将在温莎大学的S. Das博士的监督下完成研究工作。