Research on Full-Scale Hydrostatic Burst Testing of Different Pipeline Girth Weld Defects

摘要：

　　Recently incidents related to cracking of girth welds in oil and gas pipelines occurred frequently.With highly concentrated stresses,girth weld defects may significantly reduce bearing capacity of pipelines.Many girth weld defects were detected in the in-line inspection and excavated verification.How to assess the severity of these defects to avoid the excessive and unnecessary repair was a technical challenge.Four different kinds of girth weld defects were manufactured in the 32-inch pipeline and full-scale hydrostatic burst testing were carried out to assess the pressure performance of these defects.Many fitness-for-purpose assessment methods were applied to verify the accuracy of experimental results.After the testing,pipelines with failure defects were cut out to carry out the microanalysis.The research results make us understanding the severity of these defects and avoid the excessive and unnecessary repair of these defects to ensure the pipeline safety.

关键词： Girth weld defect Hydrostatic burst testing Burst failure pressure Fitness for purpose assessment

作者: Wenbo Xuan Fuxiang Wang Lijian Zhou Ting Wang Jian Chen Zhengqiang Lei Hui Yang

作者单位: CNPC Key Laboratory of Oil & Gas Storage and Transportation,PetroChina Pipeline R & D Center,Langfang 065000,China

会议类型: 国际会议

会议名称: 2016 International Symposium on Structural Integrity，ISSI—2016(2016国际结构完整性研讨会)

会议地点: 天津

会议语种:英文

页码: 351-355

在线出版日期: 2016-05-26（万方平台首次上网日期，不代表论文的发表时间）