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首页> 外文会议>ASME international pipeline conference 2008 >FAILURES OF WELDING REPAIRED PIPELINE
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FAILURES OF WELDING REPAIRED PIPELINE

机译：修复管道故障

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摘要

Enormous attention has been attracted to the safety issues regarding numerous pipelines that have had to be repaired by welding. The present paper describes experimental and numerical research conducted to assess the structural condition of welding-repaired pipeline, subjected to internal pressure including cyclic load. Six full-scale pipe specimens are tested under pressure to determine their structural capacity. Their stress distributions are measured, and their stress concentrations and yield and burst limit load are analyzed. The results of the present study demonstrate that on the pipelines with a single drilled hole the burst occurred far from the welding sites, whereas on the pipelines with several holes drilled in short span the burst took place between the two adjacent tube caps, suggesting that multi-cap repair is disadvantageous to the loading capability of the pipelines. It is also found that the burst pressure may not be affected by welding either tube-cap or patch and cyclic loading, but the yield limit loads of the repaired pipelines decreased respect to undamaged pipeline, among which the lowest one decreased up to 85% of that of the undamaged pipeline. In addition, using nonlinear finite element tools, stresses state in welding repaired pipeline is calculated. It is showed that bulging occurs in long and narrow area along longitudinal direction, addressing where burst rupture occur.
机译：对于必须通过焊接修复的许多管道的安全问题引起了极大的关注。本文描述了进行实验和数值研究以评估焊接修复管道在承受包括循环载荷在内的内部压力的条件下的结构条件。在压力下测试了六个全尺寸管道样本，以确定它们的结构能力。测量了它们的应力分布，并分析了它们的应力集中，屈服和爆破极限载荷。本研究的结果表明，在具有单个钻孔的管道上，爆裂发生在远离焊接位置的地方，而在具有短跨度的多个钻孔的管道上，爆裂发生在两个相邻的管帽之间，这表明多帽盖维修不利于管道的装载能力。还发现，爆破压力可能不受焊接管盖或补片和循环载荷的影响，但是相对于未损坏的管道，修复后的管道的屈服极限载荷有所降低，其中最低的下降了85％。完好无损的管道。另外，使用非线性有限元工具，计算出焊接修复管道的应力状态。结果表明，鼓胀发生在纵向的长而狭窄的区域，解决了破裂破裂的发生。

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  • 来源
  • 会议地点 Calgary(CA);Calgary(CA);Calgary(CA)
  • 作者

    Jian Shuai; Xiaolin Wang; Xiaomin Wang;

  • 作者单位

    Faculty of Mechanical and Electronic Engineering, China University of Petroleum-Beijing. Beijing, China;

    Faculty of Mechanical and Electronic Engineering, China University of Petroleum-Beijing. Beijing, China;

    Faculty of Mechanical and Electronic Engineering, China University of Petroleum-Beijing. Beijing, China;

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