• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>ASME international pipeline conference 2008 >PREDICTIVE ASSESSMENT OF EXTERNAL CORROSION ON TRANSMISSION PIPELINES
【24h】

PREDICTIVE ASSESSMENT OF EXTERNAL CORROSION ON TRANSMISSION PIPELINES

机译：输油管道外部腐蚀的预测评估

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Oil and Gas operators have to deal with the ageing process of their transmission pipeline grid. Some of these pipelines can be inspected using In Line Inspection (ILI) tools. In order to maintain an acceptable integrity level, re-inspection operations have to be performed. This process needs to be optimized in terms of resources and cost.rnGaz de France R&D Division has developed a methodology which prioritizes rehabilitation operations on a pipeline after in-line inspections, and determines the optimal interval for re-inspection. A reliable help decision software tool which applies the methodology has also been developed.rnDealing with defects assimilated to external electrochemical corrosion, the developed methodology is based on :rn1. pigs information in order to assess a probable corrosion growth rate,rn2. probabilistic distribution of input parameters (geometrical characteristics of defects, characteristics of the pipe and corrosion growth rate),rn3. probabilistic methods of calculation : the probability of failure is calculated with the Monte-Carlo method.rnThe convergence of the calculation is accelerated with the Cross Entropy method.rnThe calculation results take the form of three probabilities of failure :rn4. a punctual probability of failure for each defect,rn5. an annual probability of failure for each defect,rn6. an annual probability of failure per kilometer of pipe.rnTo interpret the results, the annual probability of failure per kilometer of pipe is then compared with threshold values.
机译：石油和天然气运营商必须应对其输电管道网的老化过程。可以使用在线检查（ILI）工具检查其中一些管道。为了维持可接受的完整性级别，必须执行重新检查操作。需要在资源和成本方面优化此过程。法国天然气研发部门已经开发出一种方法，该方法可以对在线检查后的管道修复工作进行优先排序，并确定重新检查的最佳间隔。还开发了使用该方法的可靠的帮助决策软件工具。rn由于存在与外部电化学腐蚀相似的缺陷，因此该方法基于：rn1。养猪信息以评估可能的腐蚀增长率rn2。输入参数的概率分布（缺陷的几何特征，管道的特征和腐蚀增长率），rn3。计算的概率方法：使用蒙特卡洛方法计算失败的概率。rn使用交叉熵方法加速计算的收敛。rn计算结果采用三种失败概率的形式：rn4。每个缺陷的准时故障概率，rn5。每个缺陷每年发生故障的概率，rn6。为了解释结果，将每公里管道的年故障概率与阈值进行比较。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号