Predictive crack growth models for pipeline integrity and risk management - phase III

用于管道完整性和风险管理的预测裂纹扩展模型 - 第三阶段

• 批准号: 485316-2015
• 负责人: Chen, Weixing
• 金额: $ 12.16万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=619294
• 关键词: Predictive; crack; growth; models; pipeline

Pipeline transportation is vital to Canadian economy. In 2013, Canada's oil and gas exports, worth $81 billion, were carried by pipelines. The safety and integrity of pipelines is a matter of paramount importance due to the hazardous nature of the transported substances. Despite the fact that pipeline is the best method of transportation, over the last 20 years, pipeline incidents have caused over $6.3 billion in property damage in Canada. Near-Neutral pH Stress Corrosion Cracking (NNpHSCC) represents a substantial cost to Canadian pipeline companies and hence to Canadian consumers. SCC is controlled from an integrity management point of view by in-line inspection for oil pipelines or by hydrostatic testing for gas pipelines. Either of these techniques provides protection from in-service failures for a number of years and then the process has to be repeated. The testing cycle is particularly troublesome for gas pipelines since only quite large flaws that fail at hydrotest stress are detected by the hydrostatic testing technique. These procedures are also enormously expensive. The re-inspection interval or re-test interval is currently determined based on empirical models, which are rather imprecise. The ultimate goal of the current proposal is to understand the SCC mechanisms and to develop solutions for crack growth control and integrity management. This research builds upon 2 previous NSERC CRD projects. In the current Phase (Phase III), significant efforts will be made to further improve the predictability of Pipe-Online (trade mark-pending) software developed in previous phases, and at the same time, the attention will also be shifted to some new directions. This includes efforts to develop new practical approaches and/or to modify existing approaches for a better management of pipeline integrity and risk during pipeline operation.

管道运输对加拿大经济至关重要。 2013年，加拿大石油和天然气出口价值810亿美元，都是通过管道运输的。由于运输物质的危险性，管道的安全性和完整性至关重要。尽管管道是最好的运输方式，但在过去 20 年里，管道事故已在加拿大造成了超过 63 亿美元的财产损失。近中性 pH 值应力腐蚀开裂 (NNpHSCC) 对加拿大管道公司以及加拿大消费者来说意味着巨大的成本。 SCC是从完整性管理的角度通过石油管道的在线检查或天然气管道的水压测试来控制的。这些技术中的任何一种都可以在数年内提供针对使用中故障的保护，然后必须重复该过程。对于天然气管道来说，测试周期尤其麻烦，因为静水压测试技术只能检测到在水压测试应力下失效的相当大的缺陷。这些程序也非常昂贵。目前，复检间隔或复测间隔是根据经验模型确定的，不够精确。当前提案的最终目标是了解 SCC 机制并开发裂纹扩展控制和完整性管理的解决方案。这项研究建立在之前的 2 个 NSERC CRD 项目的基础上。当前阶段（第三阶段）将着力进一步提高前阶段开发的Pipe-Online（商标待审）软件的可预测性，同时，重点也会转向一些新的方向。这包括努力开发新的实用方法和/或修改现有方法，以更好地管理管道运营期间的管道完整性和风险。