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，加拿大的石油和天然气出口价为81亿加元，由管道携带。由于运输物质的危险性质，管道的安全性和完整性至关重要。尽管管道是过去20年中的最佳运输方法，但管道事件在加拿大造成了超过63亿加元的财产损失。近乎中性的pH应力腐蚀破裂（NNPHSCC）对加拿大管道公司和加拿大消费者来说是巨大的成本。 SCC是通过在线检查油管管道或通过静水气管测试气管管道来控制的SCC。这些技术中的任何一种都可以保护多年来的保护措施，然后必须重复该过程。对于气体管道，测试周期尤其麻烦，因为仅通过静水测试技术检测到在水力发电应力下失败的很大缺陷。这些程序也非常昂贵。当前根据经验模型确定重新测试间隔或重新测试间隔，这些模型相当不精确。当前提案的最终目标是了解SCC机制，并为裂缝增长控制和完整性管理开发解决方案。这项研究基于以前的两个NSERC CRD项目。在当前阶段（第三阶段），将做出重大努力，以进一步提高以前阶段开发的管道通道（商标序列）软件的可预测性，同时，注意力也将转移到一些新的方向上。这包括开发新的实用方法和/或修改现有方法，以更好地管理管道完整性和管道操作期间风险的努力。